/*
Copyright 2019 Google LLC

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package bigtable

import (
	"context"
	"flag"
	"fmt"
	"math"
	"math/rand"
	"sort"
	"strings"
	"sync"
	"testing"
	"time"

	"cloud.google.com/go/internal/testutil"
	"github.com/golang/protobuf/proto"
	"google.golang.org/api/iterator"
	btapb "google.golang.org/genproto/googleapis/bigtable/admin/v2"
)

var presidentsSocialGraph = map[string][]string{
	"wmckinley":   {"tjefferson"},
	"gwashington": {"jadams"},
	"tjefferson":  {"gwashington", "jadams"},
	"jadams":      {"gwashington", "tjefferson"},
}

func populatePresidentsGraph(table *Table) error {
	ctx := context.Background()
	for row, ss := range presidentsSocialGraph {
		mut := NewMutation()
		for _, name := range ss {
			mut.Set("follows", name, 1000, []byte("1"))
		}
		if err := table.Apply(ctx, row, mut); err != nil {
			return fmt.Errorf("Mutating row %q: %v", row, err)
		}
	}
	return nil
}

var instanceToCreate string
var instanceToCreateZone string

func init() {
	// Don't test instance creation by default, as quota is necessary and aborted tests could strand resources.
	flag.StringVar(&instanceToCreate, "it.instance-to-create", "",
		"The id of an instance to create, update and delete. Requires sufficient Cloud Bigtable quota. Requires that it.use-prod is true.")
	flag.StringVar(&instanceToCreateZone, "it.instance-to-create-zone", "us-central1-b",
		"The zone in which to create the new test instance.")
}

func TestIntegration_ConditionalMutations(t *testing.T) {
	ctx := context.Background()
	_, _, table, _, cleanup, err := setupIntegration(ctx, t)
	if err != nil {
		t.Fatal(err)
	}
	defer cleanup()

	if err := populatePresidentsGraph(table); err != nil {
		t.Fatal(err)
	}

	// Do a conditional mutation with a complex filter.
	mutTrue := NewMutation()
	mutTrue.Set("follows", "wmckinley", 1000, []byte("1"))
	filter := ChainFilters(ColumnFilter("gwash[iz].*"), ValueFilter("."))
	mut := NewCondMutation(filter, mutTrue, nil)
	if err := table.Apply(ctx, "tjefferson", mut); err != nil {
		t.Fatalf("Conditionally mutating row: %v", err)
	}
	// Do a second condition mutation with a filter that does not match,
	// and thus no changes should be made.
	mutTrue = NewMutation()
	mutTrue.DeleteRow()
	filter = ColumnFilter("snoop.dogg")
	mut = NewCondMutation(filter, mutTrue, nil)
	if err := table.Apply(ctx, "tjefferson", mut); err != nil {
		t.Fatalf("Conditionally mutating row: %v", err)
	}

	// Fetch a row.
	row, err := table.ReadRow(ctx, "jadams")
	if err != nil {
		t.Fatalf("Reading a row: %v", err)
	}
	wantRow := Row{
		"follows": []ReadItem{
			{Row: "jadams", Column: "follows:gwashington", Timestamp: 1000, Value: []byte("1")},
			{Row: "jadams", Column: "follows:tjefferson", Timestamp: 1000, Value: []byte("1")},
		},
	}
	if !testutil.Equal(row, wantRow) {
		t.Fatalf("Read row mismatch.\n got %#v\nwant %#v", row, wantRow)
	}
}

func TestIntegration_PartialReadRows(t *testing.T) {
	ctx := context.Background()
	_, _, table, _, cleanup, err := setupIntegration(ctx, t)
	if err != nil {
		t.Fatal(err)
	}
	defer cleanup()

	if err := populatePresidentsGraph(table); err != nil {
		t.Fatal(err)
	}

	// Do a scan and stop part way through.
	// Verify that the ReadRows callback doesn't keep running.
	stopped := false
	err = table.ReadRows(ctx, InfiniteRange(""), func(r Row) bool {
		if r.Key() < "h" {
			return true
		}
		if !stopped {
			stopped = true
			return false
		}
		t.Fatalf("ReadRows kept scanning to row %q after being told to stop", r.Key())
		return false
	})
	if err != nil {
		t.Fatalf("Partial ReadRows: %v", err)
	}
}

func TestIntegration_ReadRowList(t *testing.T) {
	ctx := context.Background()
	_, _, table, _, cleanup, err := setupIntegration(ctx, t)
	if err != nil {
		t.Fatal(err)
	}
	defer cleanup()

	if err := populatePresidentsGraph(table); err != nil {
		t.Fatal(err)
	}

	// Read a RowList
	var elt []string
	keys := RowList{"wmckinley", "gwashington", "jadams"}
	want := "gwashington-jadams-1,jadams-gwashington-1,jadams-tjefferson-1,wmckinley-tjefferson-1"
	err = table.ReadRows(ctx, keys, func(r Row) bool {
		for _, ris := range r {
			for _, ri := range ris {
				elt = append(elt, formatReadItem(ri))
			}
		}
		return true
	})
	if err != nil {
		t.Fatalf("read RowList: %v", err)
	}

	if got := strings.Join(elt, ","); got != want {
		t.Fatalf("bulk read: wrong reads.\n got %q\nwant %q", got, want)
	}
}

func TestIntegration_DeleteRow(t *testing.T) {
	ctx := context.Background()
	_, _, table, _, cleanup, err := setupIntegration(ctx, t)
	if err != nil {
		t.Fatal(err)
	}
	defer cleanup()

	if err := populatePresidentsGraph(table); err != nil {
		t.Fatal(err)
	}

	// Delete a row and check it goes away.
	mut := NewMutation()
	mut.DeleteRow()
	if err := table.Apply(ctx, "wmckinley", mut); err != nil {
		t.Fatalf("Apply DeleteRow: %v", err)
	}
	row, err := table.ReadRow(ctx, "wmckinley")
	if err != nil {
		t.Fatalf("Reading a row after DeleteRow: %v", err)
	}
	if len(row) != 0 {
		t.Fatalf("Read non-zero row after DeleteRow: %v", row)
	}
}

func TestIntegration_ReadModifyWrite(t *testing.T) {
	ctx := context.Background()
	_, adminClient, table, tableName, cleanup, err := setupIntegration(ctx, t)
	if err != nil {
		t.Fatal(err)
	}
	defer cleanup()

	if err := populatePresidentsGraph(table); err != nil {
		t.Fatal(err)
	}

	if err := adminClient.CreateColumnFamily(ctx, tableName, "counter"); err != nil {
		t.Fatalf("Creating column family: %v", err)
	}

	appendRMW := func(b []byte) *ReadModifyWrite {
		rmw := NewReadModifyWrite()
		rmw.AppendValue("counter", "likes", b)
		return rmw
	}
	incRMW := func(n int64) *ReadModifyWrite {
		rmw := NewReadModifyWrite()
		rmw.Increment("counter", "likes", n)
		return rmw
	}
	rmwSeq := []struct {
		desc string
		rmw  *ReadModifyWrite
		want []byte
	}{
		{
			desc: "append #1",
			rmw:  appendRMW([]byte{0, 0, 0}),
			want: []byte{0, 0, 0},
		},
		{
			desc: "append #2",
			rmw:  appendRMW([]byte{0, 0, 0, 0, 17}), // the remaining 40 bits to make a big-endian 17
			want: []byte{0, 0, 0, 0, 0, 0, 0, 17},
		},
		{
			desc: "increment",
			rmw:  incRMW(8),
			want: []byte{0, 0, 0, 0, 0, 0, 0, 25},
		},
	}
	for _, step := range rmwSeq {
		row, err := table.ApplyReadModifyWrite(ctx, "gwashington", step.rmw)
		if err != nil {
			t.Fatalf("ApplyReadModifyWrite %+v: %v", step.rmw, err)
		}
		// Make sure the modified cell returned by the RMW operation has a timestamp.
		if row["counter"][0].Timestamp == 0 {
			t.Fatalf("RMW returned cell timestamp: got %v, want > 0", row["counter"][0].Timestamp)
		}
		clearTimestamps(row)
		wantRow := Row{"counter": []ReadItem{{Row: "gwashington", Column: "counter:likes", Value: step.want}}}
		if !testutil.Equal(row, wantRow) {
			t.Fatalf("After %s,\n got %v\nwant %v", step.desc, row, wantRow)
		}
	}

	// Check for google-cloud-go/issues/723. RMWs that insert new rows should keep row order sorted in the emulator.
	_, err = table.ApplyReadModifyWrite(ctx, "issue-723-2", appendRMW([]byte{0}))
	if err != nil {
		t.Fatalf("ApplyReadModifyWrite null string: %v", err)
	}
	_, err = table.ApplyReadModifyWrite(ctx, "issue-723-1", appendRMW([]byte{0}))
	if err != nil {
		t.Fatalf("ApplyReadModifyWrite null string: %v", err)
	}
	// Get only the correct row back on read.
	r, err := table.ReadRow(ctx, "issue-723-1")
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	if r.Key() != "issue-723-1" {
		t.Fatalf("ApplyReadModifyWrite: incorrect read after RMW,\n got %v\nwant %v", r.Key(), "issue-723-1")
	}
}

func TestIntegration_ArbitraryTimestamps(t *testing.T) {
	ctx := context.Background()
	_, adminClient, table, tableName, cleanup, err := setupIntegration(ctx, t)
	if err != nil {
		t.Fatal(err)
	}
	defer cleanup()

	// Test arbitrary timestamps more thoroughly.
	if err := adminClient.CreateColumnFamily(ctx, tableName, "ts"); err != nil {
		t.Fatalf("Creating column family: %v", err)
	}
	const numVersions = 4
	mut := NewMutation()
	for i := 1; i < numVersions; i++ {
		// Timestamps are used in thousands because the server
		// only permits that granularity.
		mut.Set("ts", "col", Timestamp(i*1000), []byte(fmt.Sprintf("val-%d", i)))
		mut.Set("ts", "col2", Timestamp(i*1000), []byte(fmt.Sprintf("val-%d", i)))
	}
	if err := table.Apply(ctx, "testrow", mut); err != nil {
		t.Fatalf("Mutating row: %v", err)
	}
	r, err := table.ReadRow(ctx, "testrow")
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	wantRow := Row{"ts": []ReadItem{
		// These should be returned in descending timestamp order.
		{Row: "testrow", Column: "ts:col", Timestamp: 3000, Value: []byte("val-3")},
		{Row: "testrow", Column: "ts:col", Timestamp: 2000, Value: []byte("val-2")},
		{Row: "testrow", Column: "ts:col", Timestamp: 1000, Value: []byte("val-1")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 3000, Value: []byte("val-3")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 2000, Value: []byte("val-2")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 1000, Value: []byte("val-1")},
	}}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Cell with multiple versions,\n got %v\nwant %v", r, wantRow)
	}

	// Do the same read, but filter to the latest two versions.
	r, err = table.ReadRow(ctx, "testrow", RowFilter(LatestNFilter(2)))
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	wantRow = Row{"ts": []ReadItem{
		{Row: "testrow", Column: "ts:col", Timestamp: 3000, Value: []byte("val-3")},
		{Row: "testrow", Column: "ts:col", Timestamp: 2000, Value: []byte("val-2")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 3000, Value: []byte("val-3")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 2000, Value: []byte("val-2")},
	}}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Cell with multiple versions and LatestNFilter(2),\n got %v\nwant %v", r, wantRow)
	}
	// Check cell offset / limit
	r, err = table.ReadRow(ctx, "testrow", RowFilter(CellsPerRowLimitFilter(3)))
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	wantRow = Row{"ts": []ReadItem{
		{Row: "testrow", Column: "ts:col", Timestamp: 3000, Value: []byte("val-3")},
		{Row: "testrow", Column: "ts:col", Timestamp: 2000, Value: []byte("val-2")},
		{Row: "testrow", Column: "ts:col", Timestamp: 1000, Value: []byte("val-1")},
	}}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Cell with multiple versions and CellsPerRowLimitFilter(3),\n got %v\nwant %v", r, wantRow)
	}
	r, err = table.ReadRow(ctx, "testrow", RowFilter(CellsPerRowOffsetFilter(3)))
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	wantRow = Row{"ts": []ReadItem{
		{Row: "testrow", Column: "ts:col2", Timestamp: 3000, Value: []byte("val-3")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 2000, Value: []byte("val-2")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 1000, Value: []byte("val-1")},
	}}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Cell with multiple versions and CellsPerRowOffsetFilter(3),\n got %v\nwant %v", r, wantRow)
	}
	// Check timestamp range filtering (with truncation)
	r, err = table.ReadRow(ctx, "testrow", RowFilter(TimestampRangeFilterMicros(1001, 3000)))
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	wantRow = Row{"ts": []ReadItem{
		{Row: "testrow", Column: "ts:col", Timestamp: 2000, Value: []byte("val-2")},
		{Row: "testrow", Column: "ts:col", Timestamp: 1000, Value: []byte("val-1")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 2000, Value: []byte("val-2")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 1000, Value: []byte("val-1")},
	}}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Cell with multiple versions and TimestampRangeFilter(1000, 3000),\n got %v\nwant %v", r, wantRow)
	}
	r, err = table.ReadRow(ctx, "testrow", RowFilter(TimestampRangeFilterMicros(1000, 0)))
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	wantRow = Row{"ts": []ReadItem{
		{Row: "testrow", Column: "ts:col", Timestamp: 3000, Value: []byte("val-3")},
		{Row: "testrow", Column: "ts:col", Timestamp: 2000, Value: []byte("val-2")},
		{Row: "testrow", Column: "ts:col", Timestamp: 1000, Value: []byte("val-1")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 3000, Value: []byte("val-3")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 2000, Value: []byte("val-2")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 1000, Value: []byte("val-1")},
	}}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Cell with multiple versions and TimestampRangeFilter(1000, 0),\n got %v\nwant %v", r, wantRow)
	}
	// Delete non-existing cells, no such column family in this row
	// Should not delete anything
	if err := adminClient.CreateColumnFamily(ctx, tableName, "non-existing"); err != nil {
		t.Fatalf("Creating column family: %v", err)
	}
	mut = NewMutation()
	mut.DeleteTimestampRange("non-existing", "col", 2000, 3000) // half-open interval
	if err := table.Apply(ctx, "testrow", mut); err != nil {
		t.Fatalf("Mutating row: %v", err)
	}
	r, err = table.ReadRow(ctx, "testrow", RowFilter(LatestNFilter(3)))
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Cell was deleted unexpectly,\n got %v\nwant %v", r, wantRow)
	}
	// Delete non-existing cells, no such column in this column family
	// Should not delete anything
	mut = NewMutation()
	mut.DeleteTimestampRange("ts", "non-existing", 2000, 3000) // half-open interval
	if err := table.Apply(ctx, "testrow", mut); err != nil {
		t.Fatalf("Mutating row: %v", err)
	}
	r, err = table.ReadRow(ctx, "testrow", RowFilter(LatestNFilter(3)))
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Cell was deleted unexpectly,\n got %v\nwant %v", r, wantRow)
	}
	// Delete the cell with timestamp 2000 and repeat the last read,
	// checking that we get ts 3000 and ts 1000.
	mut = NewMutation()
	mut.DeleteTimestampRange("ts", "col", 2001, 3000) // half-open interval
	if err := table.Apply(ctx, "testrow", mut); err != nil {
		t.Fatalf("Mutating row: %v", err)
	}
	r, err = table.ReadRow(ctx, "testrow", RowFilter(LatestNFilter(2)))
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	wantRow = Row{"ts": []ReadItem{
		{Row: "testrow", Column: "ts:col", Timestamp: 3000, Value: []byte("val-3")},
		{Row: "testrow", Column: "ts:col", Timestamp: 1000, Value: []byte("val-1")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 3000, Value: []byte("val-3")},
		{Row: "testrow", Column: "ts:col2", Timestamp: 2000, Value: []byte("val-2")},
	}}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Cell with multiple versions and LatestNFilter(2), after deleting timestamp 2000,\n got %v\nwant %v", r, wantRow)
	}

	// Check DeleteCellsInFamily
	if err := adminClient.CreateColumnFamily(ctx, tableName, "status"); err != nil {
		t.Fatalf("Creating column family: %v", err)
	}

	mut = NewMutation()
	mut.Set("status", "start", 2000, []byte("2"))
	mut.Set("status", "end", 3000, []byte("3"))
	mut.Set("ts", "col", 1000, []byte("1"))
	if err := table.Apply(ctx, "row1", mut); err != nil {
		t.Fatalf("Mutating row: %v", err)
	}
	if err := table.Apply(ctx, "row2", mut); err != nil {
		t.Fatalf("Mutating row: %v", err)
	}

	mut = NewMutation()
	mut.DeleteCellsInFamily("status")
	if err := table.Apply(ctx, "row1", mut); err != nil {
		t.Fatalf("Delete cf: %v", err)
	}

	// ColumnFamily removed
	r, err = table.ReadRow(ctx, "row1")
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	wantRow = Row{"ts": []ReadItem{
		{Row: "row1", Column: "ts:col", Timestamp: 1000, Value: []byte("1")},
	}}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("column family was not deleted.\n got %v\n want %v", r, wantRow)
	}

	// ColumnFamily not removed
	r, err = table.ReadRow(ctx, "row2")
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	wantRow = Row{
		"ts": []ReadItem{
			{Row: "row2", Column: "ts:col", Timestamp: 1000, Value: []byte("1")},
		},
		"status": []ReadItem{
			{Row: "row2", Column: "status:end", Timestamp: 3000, Value: []byte("3")},
			{Row: "row2", Column: "status:start", Timestamp: 2000, Value: []byte("2")},
		},
	}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Column family was deleted unexpectedly.\n got %v\n want %v", r, wantRow)
	}

	// Check DeleteCellsInColumn
	mut = NewMutation()
	mut.Set("status", "start", 2000, []byte("2"))
	mut.Set("status", "middle", 3000, []byte("3"))
	mut.Set("status", "end", 1000, []byte("1"))
	if err := table.Apply(ctx, "row3", mut); err != nil {
		t.Fatalf("Mutating row: %v", err)
	}
	mut = NewMutation()
	mut.DeleteCellsInColumn("status", "middle")
	if err := table.Apply(ctx, "row3", mut); err != nil {
		t.Fatalf("Delete column: %v", err)
	}
	r, err = table.ReadRow(ctx, "row3")
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	wantRow = Row{
		"status": []ReadItem{
			{Row: "row3", Column: "status:end", Timestamp: 1000, Value: []byte("1")},
			{Row: "row3", Column: "status:start", Timestamp: 2000, Value: []byte("2")},
		},
	}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Column was not deleted.\n got %v\n want %v", r, wantRow)
	}
	mut = NewMutation()
	mut.DeleteCellsInColumn("status", "start")
	if err := table.Apply(ctx, "row3", mut); err != nil {
		t.Fatalf("Delete column: %v", err)
	}
	r, err = table.ReadRow(ctx, "row3")
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	wantRow = Row{
		"status": []ReadItem{
			{Row: "row3", Column: "status:end", Timestamp: 1000, Value: []byte("1")},
		},
	}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Column was not deleted.\n got %v\n want %v", r, wantRow)
	}
	mut = NewMutation()
	mut.DeleteCellsInColumn("status", "end")
	if err := table.Apply(ctx, "row3", mut); err != nil {
		t.Fatalf("Delete column: %v", err)
	}
	r, err = table.ReadRow(ctx, "row3")
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	if len(r) != 0 {
		t.Fatalf("Delete column: got %v, want empty row", r)
	}
	// Add same cell after delete
	mut = NewMutation()
	mut.Set("status", "end", 1000, []byte("1"))
	if err := table.Apply(ctx, "row3", mut); err != nil {
		t.Fatalf("Mutating row: %v", err)
	}
	r, err = table.ReadRow(ctx, "row3")
	if err != nil {
		t.Fatalf("Reading row: %v", err)
	}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Column was not deleted correctly.\n got %v\n want %v", r, wantRow)
	}
}

func TestIntegration_HighlyConcurrentReadsAndWrites(t *testing.T) {
	ctx := context.Background()
	_, adminClient, table, tableName, cleanup, err := setupIntegration(ctx, t)
	if err != nil {
		t.Fatal(err)
	}
	defer cleanup()

	if err := populatePresidentsGraph(table); err != nil {
		t.Fatal(err)
	}

	if err := adminClient.CreateColumnFamily(ctx, tableName, "ts"); err != nil {
		t.Fatalf("Creating column family: %v", err)
	}

	// Do highly concurrent reads/writes.
	const maxConcurrency = 1000
	var wg sync.WaitGroup
	for i := 0; i < maxConcurrency; i++ {
		wg.Add(1)
		go func() {
			defer wg.Done()
			switch r := rand.Intn(100); { // r ∈ [0,100)
			case 0 <= r && r < 30:
				// Do a read.
				_, err := table.ReadRow(ctx, "testrow", RowFilter(LatestNFilter(1)))
				if err != nil {
					t.Errorf("Concurrent read: %v", err)
				}
			case 30 <= r && r < 100:
				// Do a write.
				mut := NewMutation()
				mut.Set("ts", "col", 1000, []byte("data"))
				if err := table.Apply(ctx, "testrow", mut); err != nil {
					t.Errorf("Concurrent write: %v", err)
				}
			}
		}()
	}
	wg.Wait()
}

func TestIntegration_LargeReadsWritesAndScans(t *testing.T) {
	ctx := context.Background()
	_, adminClient, table, tableName, cleanup, err := setupIntegration(ctx, t)
	if err != nil {
		t.Fatal(err)
	}
	defer cleanup()

	if err := adminClient.CreateColumnFamily(ctx, tableName, "ts"); err != nil {
		t.Fatalf("Creating column family: %v", err)
	}

	bigBytes := make([]byte, 5<<20) // 5 MB is larger than current default gRPC max of 4 MB, but less than the max we set.
	nonsense := []byte("lorem ipsum dolor sit amet, ")
	fill(bigBytes, nonsense)
	mut := NewMutation()
	mut.Set("ts", "col", 1000, bigBytes)
	if err := table.Apply(ctx, "bigrow", mut); err != nil {
		t.Fatalf("Big write: %v", err)
	}
	r, err := table.ReadRow(ctx, "bigrow")
	if err != nil {
		t.Fatalf("Big read: %v", err)
	}
	wantRow := Row{"ts": []ReadItem{
		{Row: "bigrow", Column: "ts:col", Timestamp: 1000, Value: bigBytes},
	}}
	if !testutil.Equal(r, wantRow) {
		t.Fatalf("Big read returned incorrect bytes: %v", r)
	}

	var wg sync.WaitGroup
	// Now write 1000 rows, each with 82 KB values, then scan them all.
	medBytes := make([]byte, 82<<10)
	fill(medBytes, nonsense)
	sem := make(chan int, 50) // do up to 50 mutations at a time.
	for i := 0; i < 1000; i++ {
		mut := NewMutation()
		mut.Set("ts", "big-scan", 1000, medBytes)
		row := fmt.Sprintf("row-%d", i)
		wg.Add(1)
		go func() {
			defer wg.Done()
			defer func() { <-sem }()
			sem <- 1
			if err := table.Apply(ctx, row, mut); err != nil {
				t.Errorf("Preparing large scan: %v", err)
			}
		}()
	}
	wg.Wait()
	n := 0
	err = table.ReadRows(ctx, PrefixRange("row-"), func(r Row) bool {
		for _, ris := range r {
			for _, ri := range ris {
				n += len(ri.Value)
			}
		}
		return true
	}, RowFilter(ColumnFilter("big-scan")))
	if err != nil {
		t.Fatalf("Doing large scan: %v", err)
	}
	if want := 1000 * len(medBytes); n != want {
		t.Fatalf("Large scan returned %d bytes, want %d", n, want)
	}
	// Scan a subset of the 1000 rows that we just created, using a LimitRows ReadOption.
	rc := 0
	wantRc := 3
	err = table.ReadRows(ctx, PrefixRange("row-"), func(r Row) bool {
		rc++
		return true
	}, LimitRows(int64(wantRc)))
	if err != nil {
		t.Fatal(err)
	}
	if rc != wantRc {
		t.Fatalf("Scan with row limit returned %d rows, want %d", rc, wantRc)
	}

	// Test bulk mutations
	if err := adminClient.CreateColumnFamily(ctx, tableName, "bulk"); err != nil {
		t.Fatalf("Creating column family: %v", err)
	}
	bulkData := map[string][]string{
		"red sox":  {"2004", "2007", "2013"},
		"patriots": {"2001", "2003", "2004", "2014"},
		"celtics":  {"1981", "1984", "1986", "2008"},
	}
	var rowKeys []string
	var muts []*Mutation
	for row, ss := range bulkData {
		mut := NewMutation()
		for _, name := range ss {
			mut.Set("bulk", name, 1000, []byte("1"))
		}
		rowKeys = append(rowKeys, row)
		muts = append(muts, mut)
	}
	status, err := table.ApplyBulk(ctx, rowKeys, muts)
	if err != nil {
		t.Fatalf("Bulk mutating rows %q: %v", rowKeys, err)
	}
	if status != nil {
		t.Fatalf("non-nil errors: %v", err)
	}

	// Read each row back
	for rowKey, ss := range bulkData {
		row, err := table.ReadRow(ctx, rowKey)
		if err != nil {
			t.Fatalf("Reading a bulk row: %v", err)
		}
		var wantItems []ReadItem
		for _, val := range ss {
			wantItems = append(wantItems, ReadItem{Row: rowKey, Column: "bulk:" + val, Timestamp: 1000, Value: []byte("1")})
		}
		wantRow := Row{"bulk": wantItems}
		if !testutil.Equal(row, wantRow) {
			t.Fatalf("Read row mismatch.\n got %#v\nwant %#v", row, wantRow)
		}
	}

	// Test bulk write errors.
	// Note: Setting timestamps as ServerTime makes sure the mutations are not retried on error.
	badMut := NewMutation()
	badMut.Set("badfamily", "col", ServerTime, nil)
	badMut2 := NewMutation()
	badMut2.Set("badfamily2", "goodcol", ServerTime, []byte("1"))
	status, err = table.ApplyBulk(ctx, []string{"badrow", "badrow2"}, []*Mutation{badMut, badMut2})
	if err != nil {
		t.Fatalf("Bulk mutating rows %q: %v", rowKeys, err)
	}
	if status == nil {
		t.Fatalf("No errors for bad bulk mutation")
	} else if status[0] == nil || status[1] == nil {
		t.Fatalf("No error for bad bulk mutation")
	}
}

func TestIntegration_Read(t *testing.T) {
	ctx := context.Background()
	_, _, table, _, cleanup, err := setupIntegration(ctx, t)
	if err != nil {
		t.Fatal(err)
	}
	defer cleanup()

	// Insert some data.
	initialData := map[string][]string{
		"wmckinley":   {"tjefferson"},
		"gwashington": {"jadams"},
		"tjefferson":  {"gwashington", "jadams", "wmckinley"},
		"jadams":      {"gwashington", "tjefferson"},
	}
	for row, ss := range initialData {
		mut := NewMutation()
		for _, name := range ss {
			mut.Set("follows", name, 1000, []byte("1"))
		}
		if err := table.Apply(ctx, row, mut); err != nil {
			t.Fatalf("Mutating row %q: %v", row, err)
		}
	}

	for _, test := range []struct {
		desc   string
		rr     RowSet
		filter Filter     // may be nil
		limit  ReadOption // may be nil

		// We do the read, grab all the cells, turn them into "<row>-<col>-<val>",
		// and join with a comma.
		want string
	}{
		{
			desc: "read all, unfiltered",
			rr:   RowRange{},
			want: "gwashington-jadams-1,jadams-gwashington-1,jadams-tjefferson-1,tjefferson-gwashington-1,tjefferson-jadams-1,tjefferson-wmckinley-1,wmckinley-tjefferson-1",
		},
		{
			desc: "read with InfiniteRange, unfiltered",
			rr:   InfiniteRange("tjefferson"),
			want: "tjefferson-gwashington-1,tjefferson-jadams-1,tjefferson-wmckinley-1,wmckinley-tjefferson-1",
		},
		{
			desc: "read with NewRange, unfiltered",
			rr:   NewRange("gargamel", "hubbard"),
			want: "gwashington-jadams-1",
		},
		{
			desc: "read with PrefixRange, unfiltered",
			rr:   PrefixRange("jad"),
			want: "jadams-gwashington-1,jadams-tjefferson-1",
		},
		{
			desc: "read with SingleRow, unfiltered",
			rr:   SingleRow("wmckinley"),
			want: "wmckinley-tjefferson-1",
		},
		{
			desc:   "read all, with ColumnFilter",
			rr:     RowRange{},
			filter: ColumnFilter(".*j.*"), // matches "jadams" and "tjefferson"
			want:   "gwashington-jadams-1,jadams-tjefferson-1,tjefferson-jadams-1,wmckinley-tjefferson-1",
		},
		{
			desc:   "read all, with ColumnFilter, prefix",
			rr:     RowRange{},
			filter: ColumnFilter("j"), // no matches
			want:   "",
		},
		{
			desc:   "read range, with ColumnRangeFilter",
			rr:     RowRange{},
			filter: ColumnRangeFilter("follows", "h", "k"),
			want:   "gwashington-jadams-1,tjefferson-jadams-1",
		},
		{
			desc:   "read range from empty, with ColumnRangeFilter",
			rr:     RowRange{},
			filter: ColumnRangeFilter("follows", "", "u"),
			want:   "gwashington-jadams-1,jadams-gwashington-1,jadams-tjefferson-1,tjefferson-gwashington-1,tjefferson-jadams-1,wmckinley-tjefferson-1",
		},
		{
			desc:   "read range from start to empty, with ColumnRangeFilter",
			rr:     RowRange{},
			filter: ColumnRangeFilter("follows", "h", ""),
			want:   "gwashington-jadams-1,jadams-tjefferson-1,tjefferson-jadams-1,tjefferson-wmckinley-1,wmckinley-tjefferson-1",
		},
		{
			desc:   "read with RowKeyFilter",
			rr:     RowRange{},
			filter: RowKeyFilter(".*wash.*"),
			want:   "gwashington-jadams-1",
		},
		{
			desc:   "read with RowKeyFilter, prefix",
			rr:     RowRange{},
			filter: RowKeyFilter("gwash"),
			want:   "",
		},
		{
			desc:   "read with RowKeyFilter, no matches",
			rr:     RowRange{},
			filter: RowKeyFilter(".*xxx.*"),
			want:   "",
		},
		{
			desc:   "read with FamilyFilter, no matches",
			rr:     RowRange{},
			filter: FamilyFilter(".*xxx.*"),
			want:   "",
		},
		{
			desc:   "read with ColumnFilter + row limit",
			rr:     RowRange{},
			filter: ColumnFilter(".*j.*"), // matches "jadams" and "tjefferson"
			limit:  LimitRows(2),
			want:   "gwashington-jadams-1,jadams-tjefferson-1",
		},
		{
			desc:   "read all, strip values",
			rr:     RowRange{},
			filter: StripValueFilter(),
			want:   "gwashington-jadams-,jadams-gwashington-,jadams-tjefferson-,tjefferson-gwashington-,tjefferson-jadams-,tjefferson-wmckinley-,wmckinley-tjefferson-",
		},
		{
			desc:   "read with ColumnFilter + row limit + strip values",
			rr:     RowRange{},
			filter: ChainFilters(ColumnFilter(".*j.*"), StripValueFilter()), // matches "jadams" and "tjefferson"
			limit:  LimitRows(2),
			want:   "gwashington-jadams-,jadams-tjefferson-",
		},
		{
			desc:   "read with condition, strip values on true",
			rr:     RowRange{},
			filter: ConditionFilter(ColumnFilter(".*j.*"), StripValueFilter(), nil),
			want:   "gwashington-jadams-,jadams-gwashington-,jadams-tjefferson-,tjefferson-gwashington-,tjefferson-jadams-,tjefferson-wmckinley-,wmckinley-tjefferson-",
		},
		{
			desc:   "read with condition, strip values on false",
			rr:     RowRange{},
			filter: ConditionFilter(ColumnFilter(".*xxx.*"), nil, StripValueFilter()),
			want:   "gwashington-jadams-,jadams-gwashington-,jadams-tjefferson-,tjefferson-gwashington-,tjefferson-jadams-,tjefferson-wmckinley-,wmckinley-tjefferson-",
		},
		{
			desc:   "read with ValueRangeFilter + row limit",
			rr:     RowRange{},
			filter: ValueRangeFilter([]byte("1"), []byte("5")), // matches our value of "1"
			limit:  LimitRows(2),
			want:   "gwashington-jadams-1,jadams-gwashington-1,jadams-tjefferson-1",
		},
		{
			desc:   "read with ValueRangeFilter, no match on exclusive end",
			rr:     RowRange{},
			filter: ValueRangeFilter([]byte("0"), []byte("1")), // no match
			want:   "",
		},
		{
			desc:   "read with ValueRangeFilter, no matches",
			rr:     RowRange{},
			filter: ValueRangeFilter([]byte("3"), []byte("5")), // matches nothing
			want:   "",
		},
		{
			desc:   "read with InterleaveFilter, no matches on all filters",
			rr:     RowRange{},
			filter: InterleaveFilters(ColumnFilter(".*x.*"), ColumnFilter(".*z.*")),
			want:   "",
		},
		{
			desc:   "read with InterleaveFilter, no duplicate cells",
			rr:     RowRange{},
			filter: InterleaveFilters(ColumnFilter(".*g.*"), ColumnFilter(".*j.*")),
			want:   "gwashington-jadams-1,jadams-gwashington-1,jadams-tjefferson-1,tjefferson-gwashington-1,tjefferson-jadams-1,wmckinley-tjefferson-1",
		},
		{
			desc:   "read with InterleaveFilter, with duplicate cells",
			rr:     RowRange{},
			filter: InterleaveFilters(ColumnFilter(".*g.*"), ColumnFilter(".*g.*")),
			want:   "jadams-gwashington-1,jadams-gwashington-1,tjefferson-gwashington-1,tjefferson-gwashington-1",
		},
		{
			desc: "read with a RowRangeList and no filter",
			rr:   RowRangeList{NewRange("gargamel", "hubbard"), InfiniteRange("wmckinley")},
			want: "gwashington-jadams-1,wmckinley-tjefferson-1",
		},
		{
			desc:   "chain that excludes rows and matches nothing, in a condition",
			rr:     RowRange{},
			filter: ConditionFilter(ChainFilters(ColumnFilter(".*j.*"), ColumnFilter(".*mckinley.*")), StripValueFilter(), nil),
			want:   "",
		},
		{
			desc:   "chain that ends with an interleave that has no match. covers #804",
			rr:     RowRange{},
			filter: ConditionFilter(ChainFilters(ColumnFilter(".*j.*"), InterleaveFilters(ColumnFilter(".*x.*"), ColumnFilter(".*z.*"))), StripValueFilter(), nil),
			want:   "",
		},
	} {
		t.Run(test.desc, func(t *testing.T) {
			var opts []ReadOption
			if test.filter != nil {
				opts = append(opts, RowFilter(test.filter))
			}
			if test.limit != nil {
				opts = append(opts, test.limit)
			}
			var elt []string
			err := table.ReadRows(ctx, test.rr, func(r Row) bool {
				for _, ris := range r {
					for _, ri := range ris {
						elt = append(elt, formatReadItem(ri))
					}
				}
				return true
			}, opts...)
			if err != nil {
				t.Fatal(err)
			}
			if got := strings.Join(elt, ","); got != test.want {
				t.Fatalf("got %q\nwant %q", got, test.want)
			}
		})
	}
}

func TestIntegration_SampleRowKeys(t *testing.T) {
	ctx := context.Background()
	_, _, table, _, cleanup, err := setupIntegration(ctx, t)
	if err != nil {
		t.Fatal(err)
	}
	defer cleanup()

	// Insert some data.
	initialData := map[string][]string{
		"wmckinley11":   {"tjefferson11"},
		"gwashington77": {"jadams77"},
		"tjefferson0":   {"gwashington0", "jadams0"},
	}

	for row, ss := range initialData {
		mut := NewMutation()
		for _, name := range ss {
			mut.Set("follows", name, 1000, []byte("1"))
		}
		if err := table.Apply(ctx, row, mut); err != nil {
			t.Fatalf("Mutating row %q: %v", row, err)
		}
	}
	sampleKeys, err := table.SampleRowKeys(context.Background())
	if err != nil {
		t.Fatalf("%s: %v", "SampleRowKeys:", err)
	}
	if len(sampleKeys) == 0 {
		t.Error("SampleRowKeys length 0")
	}
}

func TestIntegration_Admin(t *testing.T) {
	testEnv, err := NewIntegrationEnv()
	if err != nil {
		t.Fatalf("IntegrationEnv: %v", err)
	}
	defer testEnv.Close()

	timeout := 2 * time.Second
	if testEnv.Config().UseProd {
		timeout = 5 * time.Minute
	}
	ctx, _ := context.WithTimeout(context.Background(), timeout)

	adminClient, err := testEnv.NewAdminClient()
	if err != nil {
		t.Fatalf("NewAdminClient: %v", err)
	}
	defer adminClient.Close()

	iAdminClient, err := testEnv.NewInstanceAdminClient()
	if err != nil {
		t.Fatalf("NewInstanceAdminClient: %v", err)
	}
	if iAdminClient != nil {
		defer iAdminClient.Close()

		iInfo, err := iAdminClient.InstanceInfo(ctx, adminClient.instance)
		if err != nil {
			t.Errorf("InstanceInfo: %v", err)
		}
		if iInfo.Name != adminClient.instance {
			t.Errorf("InstanceInfo returned name %#v, want %#v", iInfo.Name, adminClient.instance)
		}
	}

	list := func() []string {
		tbls, err := adminClient.Tables(ctx)
		if err != nil {
			t.Fatalf("Fetching list of tables: %v", err)
		}
		sort.Strings(tbls)
		return tbls
	}
	containsAll := func(got, want []string) bool {
		gotSet := make(map[string]bool)

		for _, s := range got {
			gotSet[s] = true
		}
		for _, s := range want {
			if !gotSet[s] {
				return false
			}
		}
		return true
	}

	defer adminClient.DeleteTable(ctx, "mytable")

	if err := adminClient.CreateTable(ctx, "mytable"); err != nil {
		t.Fatalf("Creating table: %v", err)
	}

	defer adminClient.DeleteTable(ctx, "myothertable")

	if err := adminClient.CreateTable(ctx, "myothertable"); err != nil {
		t.Fatalf("Creating table: %v", err)
	}

	if got, want := list(), []string{"myothertable", "mytable"}; !containsAll(got, want) {
		t.Errorf("adminClient.Tables returned %#v, want %#v", got, want)
	}

	must(adminClient.WaitForReplication(ctx, "mytable"))

	if err := adminClient.DeleteTable(ctx, "myothertable"); err != nil {
		t.Fatalf("Deleting table: %v", err)
	}
	tables := list()
	if got, want := tables, []string{"mytable"}; !containsAll(got, want) {
		t.Errorf("adminClient.Tables returned %#v, want %#v", got, want)
	}
	if got, unwanted := tables, []string{"myothertable"}; containsAll(got, unwanted) {
		t.Errorf("adminClient.Tables return %#v. unwanted %#v", got, unwanted)
	}

	tblConf := TableConf{
		TableID: "conftable",
		Families: map[string]GCPolicy{
			"fam1": MaxVersionsPolicy(1),
			"fam2": MaxVersionsPolicy(2),
		},
	}
	if err := adminClient.CreateTableFromConf(ctx, &tblConf); err != nil {
		t.Fatalf("Creating table from TableConf: %v", err)
	}
	defer adminClient.DeleteTable(ctx, tblConf.TableID)

	tblInfo, err := adminClient.TableInfo(ctx, tblConf.TableID)
	if err != nil {
		t.Fatalf("Getting table info: %v", err)
	}
	sort.Strings(tblInfo.Families)
	wantFams := []string{"fam1", "fam2"}
	if !testutil.Equal(tblInfo.Families, wantFams) {
		t.Errorf("Column family mismatch, got %v, want %v", tblInfo.Families, wantFams)
	}

	// Populate mytable and drop row ranges
	if err = adminClient.CreateColumnFamily(ctx, "mytable", "cf"); err != nil {
		t.Fatalf("Creating column family: %v", err)
	}

	client, err := testEnv.NewClient()
	if err != nil {
		t.Fatalf("NewClient: %v", err)
	}
	defer client.Close()

	tbl := client.Open("mytable")

	prefixes := []string{"a", "b", "c"}
	for _, prefix := range prefixes {
		for i := 0; i < 5; i++ {
			mut := NewMutation()
			mut.Set("cf", "col", 1000, []byte("1"))
			if err := tbl.Apply(ctx, fmt.Sprintf("%v-%v", prefix, i), mut); err != nil {
				t.Fatalf("Mutating row: %v", err)
			}
		}
	}

	if err = adminClient.DropRowRange(ctx, "mytable", "a"); err != nil {
		t.Errorf("DropRowRange a: %v", err)
	}
	if err = adminClient.DropRowRange(ctx, "mytable", "c"); err != nil {
		t.Errorf("DropRowRange c: %v", err)
	}
	if err = adminClient.DropRowRange(ctx, "mytable", "x"); err != nil {
		t.Errorf("DropRowRange x: %v", err)
	}

	var gotRowCount int
	must(tbl.ReadRows(ctx, RowRange{}, func(row Row) bool {
		gotRowCount++
		if !strings.HasPrefix(row.Key(), "b") {
			t.Errorf("Invalid row after dropping range: %v", row)
		}
		return true
	}))
	if gotRowCount != 5 {
		t.Errorf("Invalid row count after dropping range: got %v, want %v", gotRowCount, 5)
	}
}

func TestIntegration_AdminCreateInstance(t *testing.T) {
	if instanceToCreate == "" {
		t.Skip("instanceToCreate not set, skipping instance creation testing")
	}

	testEnv, err := NewIntegrationEnv()
	if err != nil {
		t.Fatalf("IntegrationEnv: %v", err)
	}
	defer testEnv.Close()

	if !testEnv.Config().UseProd {
		t.Skip("emulator doesn't support instance creation")
	}

	timeout := 5 * time.Minute
	ctx, _ := context.WithTimeout(context.Background(), timeout)

	iAdminClient, err := testEnv.NewInstanceAdminClient()
	if err != nil {
		t.Fatalf("NewInstanceAdminClient: %v", err)
	}
	defer iAdminClient.Close()

	clusterID := instanceToCreate + "-cluster"

	// Create a development instance
	conf := &InstanceConf{
		InstanceId:   instanceToCreate,
		ClusterId:    clusterID,
		DisplayName:  "test instance",
		Zone:         instanceToCreateZone,
		InstanceType: DEVELOPMENT,
	}
	if err := iAdminClient.CreateInstance(ctx, conf); err != nil {
		t.Fatalf("CreateInstance: %v", err)
	}
	defer iAdminClient.DeleteInstance(ctx, instanceToCreate)

	iInfo, err := iAdminClient.InstanceInfo(ctx, instanceToCreate)
	if err != nil {
		t.Fatalf("InstanceInfo: %v", err)
	}

	// Basic return values are tested elsewhere, check instance type
	if iInfo.InstanceType != DEVELOPMENT {
		t.Fatalf("Instance is not DEVELOPMENT: %v", err)
	}

	// Update everything we can about the instance in one call.
	confWithClusters := &InstanceWithClustersConfig{
		InstanceID:   instanceToCreate,
		DisplayName:  "new display name",
		InstanceType: PRODUCTION,
		Clusters: []ClusterConfig{
			{ClusterID: clusterID, NumNodes: 5, StorageType: HDD}},
	}

	if err = iAdminClient.UpdateInstanceWithClusters(ctx, confWithClusters); err != nil {
		t.Fatalf("UpdateInstanceWithClusters: %v", err)
	}

	iInfo, err = iAdminClient.InstanceInfo(ctx, instanceToCreate)
	if err != nil {
		t.Fatalf("InstanceInfo: %v", err)
	}

	if iInfo.InstanceType != PRODUCTION {
		t.Fatalf("Instance type is not PRODUCTION: %v", err)
	}
	if got, want := iInfo.DisplayName, confWithClusters.DisplayName; got != want {
		t.Fatalf("Display name: %q, want: %q", got, want)
	}

	cInfo, err := iAdminClient.GetCluster(ctx, instanceToCreate, clusterID)
	if err != nil {
		t.Fatalf("GetCluster: %v", err)
	}

	if cInfo.ServeNodes != 5 {
		t.Fatalf("NumNodes: %v, want: %v", cInfo.ServeNodes, 5)
	}

	if cInfo.StorageType != HDD {
		t.Fatalf("StorageType: %v, want: %v", cInfo.StorageType, HDD)
	}
}

func TestIntegration_AdminSnapshot(t *testing.T) {
	testEnv, err := NewIntegrationEnv()
	if err != nil {
		t.Fatalf("IntegrationEnv: %v", err)
	}
	defer testEnv.Close()

	if !testEnv.Config().UseProd {
		t.Skip("emulator doesn't support snapshots")
	}

	timeout := 2 * time.Second
	if testEnv.Config().UseProd {
		timeout = 5 * time.Minute
	}
	ctx, _ := context.WithTimeout(context.Background(), timeout)

	adminClient, err := testEnv.NewAdminClient()
	if err != nil {
		t.Fatalf("NewAdminClient: %v", err)
	}
	defer adminClient.Close()

	table := testEnv.Config().Table
	cluster := testEnv.Config().Cluster

	list := func(cluster string) ([]*SnapshotInfo, error) {
		infos := []*SnapshotInfo(nil)

		it := adminClient.Snapshots(ctx, cluster)
		for {
			s, err := it.Next()
			if err == iterator.Done {
				break
			}
			if err != nil {
				return nil, err
			}
			infos = append(infos, s)
		}
		return infos, err
	}

	// Delete the table at the end of the test. Schedule ahead of time
	// in case the client fails
	defer adminClient.DeleteTable(ctx, table)

	if err := adminClient.CreateTable(ctx, table); err != nil {
		t.Fatalf("Creating table: %v", err)
	}

	// Precondition: no snapshots
	snapshots, err := list(cluster)
	if err != nil {
		t.Fatalf("Initial snapshot list: %v", err)
	}
	if got, want := len(snapshots), 0; got != want {
		t.Fatalf("Initial snapshot list len: %d, want: %d", got, want)
	}

	// Create snapshot
	defer adminClient.DeleteSnapshot(ctx, cluster, "mysnapshot")

	if err = adminClient.SnapshotTable(ctx, table, cluster, "mysnapshot", 5*time.Hour); err != nil {
		t.Fatalf("Creating snaphot: %v", err)
	}

	// List snapshot
	snapshots, err = list(cluster)
	if err != nil {
		t.Fatalf("Listing snapshots: %v", err)
	}
	if got, want := len(snapshots), 1; got != want {
		t.Fatalf("Listing snapshot count: %d, want: %d", got, want)
	}
	if got, want := snapshots[0].Name, "mysnapshot"; got != want {
		t.Fatalf("Snapshot name: %s, want: %s", got, want)
	}
	if got, want := snapshots[0].SourceTable, table; got != want {
		t.Fatalf("Snapshot SourceTable: %s, want: %s", got, want)
	}
	if got, want := snapshots[0].DeleteTime, snapshots[0].CreateTime.Add(5*time.Hour); math.Abs(got.Sub(want).Minutes()) > 1 {
		t.Fatalf("Snapshot DeleteTime: %s, want: %s", got, want)
	}

	// Get snapshot
	snapshot, err := adminClient.SnapshotInfo(ctx, cluster, "mysnapshot")
	if err != nil {
		t.Fatalf("SnapshotInfo: %v", snapshot)
	}
	if got, want := *snapshot, *snapshots[0]; got != want {
		t.Fatalf("SnapshotInfo: %v, want: %v", got, want)
	}

	// Restore
	restoredTable := table + "-restored"
	defer adminClient.DeleteTable(ctx, restoredTable)
	if err = adminClient.CreateTableFromSnapshot(ctx, restoredTable, cluster, "mysnapshot"); err != nil {
		t.Fatalf("CreateTableFromSnapshot: %v", err)
	}
	if _, err := adminClient.TableInfo(ctx, restoredTable); err != nil {
		t.Fatalf("Restored TableInfo: %v", err)
	}

	// Delete snapshot
	if err = adminClient.DeleteSnapshot(ctx, cluster, "mysnapshot"); err != nil {
		t.Fatalf("DeleteSnapshot: %v", err)
	}
	snapshots, err = list(cluster)
	if err != nil {
		t.Fatalf("List after Delete: %v", err)
	}
	if got, want := len(snapshots), 0; got != want {
		t.Fatalf("List after delete len: %d, want: %d", got, want)
	}
}

func TestIntegration_Granularity(t *testing.T) {
	testEnv, err := NewIntegrationEnv()
	if err != nil {
		t.Fatalf("IntegrationEnv: %v", err)
	}
	defer testEnv.Close()

	timeout := 2 * time.Second
	if testEnv.Config().UseProd {
		timeout = 5 * time.Minute
	}
	ctx, _ := context.WithTimeout(context.Background(), timeout)
	ctx = mergeOutgoingMetadata(ctx, withGoogleClientInfo())

	adminClient, err := testEnv.NewAdminClient()
	if err != nil {
		t.Fatalf("NewAdminClient: %v", err)
	}
	defer adminClient.Close()

	list := func() []string {
		tbls, err := adminClient.Tables(ctx)
		if err != nil {
			t.Fatalf("Fetching list of tables: %v", err)
		}
		sort.Strings(tbls)
		return tbls
	}
	containsAll := func(got, want []string) bool {
		gotSet := make(map[string]bool)

		for _, s := range got {
			gotSet[s] = true
		}
		for _, s := range want {
			if !gotSet[s] {
				return false
			}
		}
		return true
	}

	defer adminClient.DeleteTable(ctx, "mytable")

	if err := adminClient.CreateTable(ctx, "mytable"); err != nil {
		t.Fatalf("Creating table: %v", err)
	}

	tables := list()
	if got, want := tables, []string{"mytable"}; !containsAll(got, want) {
		t.Errorf("adminClient.Tables returned %#v, want %#v", got, want)
	}

	// calling ModifyColumnFamilies to check the granularity of table
	prefix := adminClient.instancePrefix()
	req := &btapb.ModifyColumnFamiliesRequest{
		Name: prefix + "/tables/" + "mytable",
		Modifications: []*btapb.ModifyColumnFamiliesRequest_Modification{{
			Id:  "cf",
			Mod: &btapb.ModifyColumnFamiliesRequest_Modification_Create{&btapb.ColumnFamily{}},
		}},
	}
	table, err := adminClient.tClient.ModifyColumnFamilies(ctx, req)
	if err != nil {
		t.Fatalf("Creating column family: %v", err)
	}
	if table.Granularity != btapb.Table_TimestampGranularity(btapb.Table_MILLIS) {
		t.Errorf("ModifyColumnFamilies returned granularity %#v, want %#v", table.Granularity, btapb.Table_TimestampGranularity(btapb.Table_MILLIS))
	}
}

func TestIntegration_InstanceAdminClient_AppProfile(t *testing.T) {
	testEnv, err := NewIntegrationEnv()
	if err != nil {
		t.Fatalf("IntegrationEnv: %v", err)
	}
	defer testEnv.Close()

	timeout := 2 * time.Second
	if testEnv.Config().UseProd {
		timeout = 5 * time.Minute
	}
	ctx, cancel := context.WithTimeout(context.Background(), timeout)
	defer cancel()

	adminClient, err := testEnv.NewAdminClient()
	if err != nil {
		t.Fatalf("NewAdminClient: %v", err)
	}
	defer adminClient.Close()

	iAdminClient, err := testEnv.NewInstanceAdminClient()
	if err != nil {
		t.Fatalf("NewInstanceAdminClient: %v", err)
	}

	if iAdminClient == nil {
		return
	}

	defer iAdminClient.Close()
	profile := ProfileConf{
		ProfileID:     "app_profile1",
		InstanceID:    adminClient.instance,
		ClusterID:     testEnv.Config().Cluster,
		Description:   "creating new app profile 1",
		RoutingPolicy: SingleClusterRouting,
	}

	createdProfile, err := iAdminClient.CreateAppProfile(ctx, profile)
	if err != nil {
		t.Fatalf("Creating app profile: %v", err)

	}

	gotProfile, err := iAdminClient.GetAppProfile(ctx, adminClient.instance, "app_profile1")

	if err != nil {
		t.Fatalf("Get app profile: %v", err)
	}

	if !proto.Equal(createdProfile, gotProfile) {
		t.Fatalf("created profile: %s, got profile: %s", createdProfile.Name, gotProfile.Name)

	}

	list := func(instanceID string) ([]*btapb.AppProfile, error) {
		profiles := []*btapb.AppProfile(nil)

		it := iAdminClient.ListAppProfiles(ctx, instanceID)
		for {
			s, err := it.Next()
			if err == iterator.Done {
				break
			}
			if err != nil {
				return nil, err
			}
			profiles = append(profiles, s)
		}
		return profiles, err
	}

	profiles, err := list(adminClient.instance)
	if err != nil {
		t.Fatalf("List app profile: %v", err)
	}

	if got, want := len(profiles), 1; got != want {
		t.Fatalf("Initial app profile list len: %d, want: %d", got, want)
	}

	for _, test := range []struct {
		desc   string
		uattrs ProfileAttrsToUpdate
		want   *btapb.AppProfile // nil means error
	}{
		{
			desc:   "empty update",
			uattrs: ProfileAttrsToUpdate{},
			want:   nil,
		},

		{
			desc:   "empty description update",
			uattrs: ProfileAttrsToUpdate{Description: ""},
			want: &btapb.AppProfile{
				Name:          gotProfile.Name,
				Description:   "",
				RoutingPolicy: gotProfile.RoutingPolicy,
				Etag:          gotProfile.Etag},
		},
		{
			desc: "routing update",
			uattrs: ProfileAttrsToUpdate{
				RoutingPolicy: SingleClusterRouting,
				ClusterID:     testEnv.Config().Cluster,
			},
			want: &btapb.AppProfile{
				Name:        gotProfile.Name,
				Description: "",
				Etag:        gotProfile.Etag,
				RoutingPolicy: &btapb.AppProfile_SingleClusterRouting_{
					SingleClusterRouting: &btapb.AppProfile_SingleClusterRouting{
						ClusterId: testEnv.Config().Cluster,
					}},
			},
		},
	} {
		err = iAdminClient.UpdateAppProfile(ctx, adminClient.instance, "app_profile1", test.uattrs)
		if err != nil {
			if test.want != nil {
				t.Errorf("%s: %v", test.desc, err)
			}
			continue
		}
		if err == nil && test.want == nil {
			t.Errorf("%s: got nil, want error", test.desc)
			continue
		}

		got, _ := iAdminClient.GetAppProfile(ctx, adminClient.instance, "app_profile1")

		if !proto.Equal(got, test.want) {
			t.Fatalf("%s : got profile : %v, want profile: %v", test.desc, gotProfile, test.want)
		}

	}

	err = iAdminClient.DeleteAppProfile(ctx, adminClient.instance, "app_profile1")
	if err != nil {
		t.Fatalf("Delete app profile: %v", err)
	}

}

func TestIntegration_InstanceUpdate(t *testing.T) {
	testEnv, err := NewIntegrationEnv()
	if err != nil {
		t.Fatalf("IntegrationEnv: %v", err)
	}
	defer testEnv.Close()

	timeout := 2 * time.Second
	if testEnv.Config().UseProd {
		timeout = 5 * time.Minute
	}
	ctx, cancel := context.WithTimeout(context.Background(), timeout)
	defer cancel()

	adminClient, err := testEnv.NewAdminClient()
	if err != nil {
		t.Fatalf("NewAdminClient: %v", err)
	}

	defer adminClient.Close()

	iAdminClient, err := testEnv.NewInstanceAdminClient()
	if err != nil {
		t.Fatalf("NewInstanceAdminClient: %v", err)
	}

	if iAdminClient == nil {
		return
	}

	defer iAdminClient.Close()

	iInfo, err := iAdminClient.InstanceInfo(ctx, adminClient.instance)
	if err != nil {
		t.Errorf("InstanceInfo: %v", err)
	}

	if iInfo.Name != adminClient.instance {
		t.Errorf("InstanceInfo returned name %#v, want %#v", iInfo.Name, adminClient.instance)
	}

	if iInfo.DisplayName != adminClient.instance {
		t.Errorf("InstanceInfo returned name %#v, want %#v", iInfo.Name, adminClient.instance)
	}

	const numNodes = 4
	// update cluster nodes
	if err := iAdminClient.UpdateCluster(ctx, adminClient.instance, testEnv.Config().Cluster, int32(numNodes)); err != nil {
		t.Errorf("UpdateCluster: %v", err)
	}

	// get cluster after updating
	cis, err := iAdminClient.GetCluster(ctx, adminClient.instance, testEnv.Config().Cluster)
	if err != nil {
		t.Errorf("GetCluster %v", err)
	}
	if cis.ServeNodes != int(numNodes) {
		t.Errorf("ServeNodes returned %d, want %d", cis.ServeNodes, int(numNodes))
	}
}

func setupIntegration(ctx context.Context, t *testing.T) (_ *Client, _ *AdminClient, table *Table, tableName string, cleanup func(), _ error) {
	testEnv, err := NewIntegrationEnv()
	if err != nil {
		return nil, nil, nil, "", nil, err
	}

	var timeout time.Duration
	if testEnv.Config().UseProd {
		timeout = 10 * time.Minute
		t.Logf("Running test against production")
	} else {
		timeout = 1 * time.Minute
		t.Logf("bttest.Server running on %s", testEnv.Config().AdminEndpoint)
	}
	ctx, cancel := context.WithTimeout(ctx, timeout)
	defer cancel()

	client, err := testEnv.NewClient()
	if err != nil {
		return nil, nil, nil, "", nil, err
	}

	adminClient, err := testEnv.NewAdminClient()
	if err != nil {
		return nil, nil, nil, "", nil, err
	}

	tableName = testEnv.Config().Table
	if err := adminClient.CreateTable(ctx, tableName); err != nil {
		return nil, nil, nil, "", nil, err
	}
	if err := adminClient.CreateColumnFamily(ctx, tableName, "follows"); err != nil {
		return nil, nil, nil, "", nil, err
	}

	return client, adminClient, client.Open(tableName), tableName, func() {
		adminClient.DeleteTable(ctx, tableName)
		client.Close()
		adminClient.Close()
	}, nil
}

func formatReadItem(ri ReadItem) string {
	// Use the column qualifier only to make the test data briefer.
	col := ri.Column[strings.Index(ri.Column, ":")+1:]
	return fmt.Sprintf("%s-%s-%s", ri.Row, col, ri.Value)
}

func fill(b, sub []byte) {
	for len(b) > len(sub) {
		n := copy(b, sub)
		b = b[n:]
	}
}

func clearTimestamps(r Row) {
	for _, ris := range r {
		for i := range ris {
			ris[i].Timestamp = 0
		}
	}
}