src/android/tests/src/com/google/android/inputmethod/japanese/ui/SpanFactoryTest.java

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package org.mozc.android.inputmethod.japanese.ui;

import static android.test.MoreAsserts.assertEmpty;

import org.mozc.android.inputmethod.japanese.protobuf.ProtoCandidates.Annotation;
import org.mozc.android.inputmethod.japanese.protobuf.ProtoCandidates.CandidateWord;
import org.mozc.android.inputmethod.japanese.ui.CandidateLayout.Span;

import android.test.suitebuilder.annotation.SmallTest;

import junit.framework.TestCase;

/**
 * Unit test for {@link SpanFactory}.
 *
 */
public class SpanFactoryTest extends TestCase {
  @SmallTest
  public void testMeasuredWidth() {
    SpanFactory spanFactory = new SpanFactory();
    spanFactory.setValueTextSize(10);
    spanFactory.setDescriptionTextSize(5);

    // Empty candidate.
    {
      Span span = spanFactory.newInstance(CandidateWord.getDefaultInstance());
      assertEquals(0f, span.getValueWidth());
      assertEquals(0f, span.getDescriptionWidth());
      assertEmpty(span.getSplitDescriptionList());
    }

    // Candidate with only value.
    CandidateWord valueCandidate = CandidateWord.newBuilder().setValue("This is candidate").build();
    Span valueSpan = spanFactory.newInstance(valueCandidate);
    assertTrue(valueSpan.getValueWidth() > 0);
    assertEquals(0f, valueSpan.getDescriptionWidth());

    // Candidate with only description.
    CandidateWord descriptionCandidate =
        CandidateWord.newBuilder().setAnnotation(Annotation.newBuilder().setDescription("desc"))
            .build();
    Span descriptionSpan = spanFactory.newInstance(descriptionCandidate);
    assertEquals(0f, descriptionSpan.getValueWidth());
    assertTrue(descriptionSpan.getDescriptionWidth() > 0);

    // Candidate with both value and description.
    CandidateWord mergedCandidate =
        valueCandidate.toBuilder().mergeFrom(descriptionCandidate).build();
    Span mergedSpan = spanFactory.newInstance(mergedCandidate);
    assertEquals(valueSpan.getValueWidth(), mergedSpan.getValueWidth());
    assertEquals(descriptionSpan.getDescriptionWidth(), mergedSpan.getDescriptionWidth());
  }
}