content: /*
   * Copyright (C) 2020 The Android Open Source Project
   *
   * 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 com.google.android.exoplayer2.text.span;
  
  import static com.google.common.truth.Truth.assertThat;
  
  import android.graphics.Color;
  import android.text.Spannable;
  import android.text.SpannableString;
  import android.text.Spanned;
  import android.text.style.BackgroundColorSpan;
  import android.text.style.ForegroundColorSpan;
  import androidx.test.ext.junit.runners.AndroidJUnit4;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  /** Tests for {@link SpanUtil}. */
  @RunWith(AndroidJUnit4.class)
  public class SpanUtilTest {
  
    @Test
    public void addOrReplaceSpan_replacesSameTypeAndIndexes() {
      Spannable spannable = SpannableString.valueOf("test text");
      spannable.setSpan(
          new ForegroundColorSpan(Color.CYAN),
          /* start= */ 2,
          /* end= */ 5,
          Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
  
      ForegroundColorSpan newSpan = new ForegroundColorSpan(Color.BLUE);
      SpanUtil.addOrReplaceSpan(
          spannable, newSpan, /* start= */ 2, /* end= */ 5, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
  
      Object[] spans = spannable.getSpans(0, spannable.length(), Object.class);
      assertThat(spans).asList().containsExactly(newSpan);
    }
  
    @Test
    public void addOrReplaceSpan_ignoresDifferentType() {
      Spannable spannable = SpannableString.valueOf("test text");
      ForegroundColorSpan originalSpan = new ForegroundColorSpan(Color.CYAN);
      spannable.setSpan(originalSpan, /* start= */ 2, /* end= */ 5, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
  
      BackgroundColorSpan newSpan = new BackgroundColorSpan(Color.BLUE);
      SpanUtil.addOrReplaceSpan(spannable, newSpan, 2, 5, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
  
      Object[] spans = spannable.getSpans(0, spannable.length(), Object.class);
      assertThat(spans).asList().containsExactly(originalSpan, newSpan).inOrder();
    }
  
    @Test
    public void addOrReplaceSpan_ignoresDifferentStartEndAndFlags() {
      Spannable spannable = SpannableString.valueOf("test text");
      ForegroundColorSpan originalSpan = new ForegroundColorSpan(Color.CYAN);
      spannable.setSpan(originalSpan, /* start= */ 2, /* end= */ 5, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
  
      ForegroundColorSpan differentStart = new ForegroundColorSpan(Color.GREEN);
      SpanUtil.addOrReplaceSpan(
          spannable, differentStart, /* start= */ 3, /* end= */ 5, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
      ForegroundColorSpan differentEnd = new ForegroundColorSpan(Color.BLUE);
      SpanUtil.addOrReplaceSpan(
          spannable, differentEnd, /* start= */ 2, /* end= */ 6, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
      ForegroundColorSpan differentFlags = new ForegroundColorSpan(Color.GREEN);
      SpanUtil.addOrReplaceSpan(
          spannable, differentFlags, /* start= */ 2, /* end= */ 5, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
  
      Object[] spans = spannable.getSpans(0, spannable.length(), Object.class);
      assertThat(spans)
          .asList()
          .containsExactly(originalSpan, differentStart, differentEnd, differentFlags)
          .inOrder();
    }
  }
  