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// Copyright 2016 Google LLC.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package grpc
import (
"context"
"errors"
"net"
"os"
"testing"
"time"
"golang.org/x/oauth2"
"google.golang.org/api/option"
"google.golang.org/grpc"
)
// Check that user optioned grpc.WithDialer option overwrites App Engine dialer
func TestGRPCHook(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
expected := false
appengineDialerHook = (func(ctx context.Context) grpc.DialOption {
return grpc.WithDialer(func(addr string, timeout time.Duration) (net.Conn, error) {
t.Error("did not expect a call to appengine dialer, got one")
cancel()
return nil, errors.New("not expected")
})
})
defer func() {
appengineDialerHook = nil
}()
expectedDialer := grpc.WithDialer(func(addr string, timeout time.Duration) (net.Conn, error) {
expected = true
cancel()
return nil, errors.New("expected")
})
conn, err := Dial(ctx,
option.WithTokenSource(oauth2.StaticTokenSource(nil)), // No creds.
option.WithGRPCDialOption(expectedDialer),
option.WithGRPCDialOption(grpc.WithBlock()))
if err != context.Canceled {
t.Errorf("got %v, want %v", err, context.Canceled)
}
if conn != nil {
conn.Close()
t.Error("got valid conn, want nil")
}
if !expected {
t.Error("expected a call to expected dialer, didn't get one")
}
}
func TestIsDirectPathEnabled(t *testing.T) {
for _, testcase := range []struct {
name string
endpoint string
envVar string
want bool
}{
{
name: "matches",
endpoint: "some-api",
envVar: "some-api",
want: true,
},
{
name: "does not match",
endpoint: "some-api",
envVar: "some-other-api",
want: false,
},
{
name: "matches in list",
endpoint: "some-api-2",
envVar: "some-api-1,some-api-2,some-api-3",
want: true,
},
{
name: "empty env var",
endpoint: "",
envVar: "",
want: false,
},
{
name: "trailing comma",
endpoint: "",
envVar: "foo,bar,",
want: false,
},
{
name: "dns schemes are allowed",
endpoint: "dns:///foo",
envVar: "dns:///foo",
want: true,
},
{
name: "non-dns schemes are disallowed",
endpoint: "https://foo",
envVar: "https://foo",
want: false,
},
} {
t.Run(testcase.name, func(t *testing.T) {
if err := os.Setenv("GOOGLE_CLOUD_ENABLE_DIRECT_PATH", testcase.envVar); err != nil {
t.Fatal(err)
}
if got := isDirectPathEnabled(testcase.endpoint); got != testcase.want {
t.Fatalf("got %v, want %v", got, testcase.want)
}
})
}
}