content: /*
   * Copyright (C) 2016 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.ttml;
  
  import static android.graphics.Color.BLACK;
  import static android.graphics.Color.RED;
  import static android.graphics.Color.YELLOW;
  import static com.google.android.exoplayer2.text.ttml.TtmlRenderUtil.resolveStyle;
  import static com.google.android.exoplayer2.text.ttml.TtmlStyle.STYLE_BOLD;
  import static com.google.android.exoplayer2.text.ttml.TtmlStyle.STYLE_BOLD_ITALIC;
  import static com.google.common.truth.Truth.assertThat;
  
  import android.graphics.Color;
  import androidx.test.ext.junit.runners.AndroidJUnit4;
  import java.util.HashMap;
  import java.util.Map;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  /** Unit test for {@link TtmlRenderUtil}. */
  @RunWith(AndroidJUnit4.class)
  public final class TtmlRenderUtilTest {
  
    @Test
    public void resolveStyleNoStyleAtAll() {
      assertThat(resolveStyle(null, null, null)).isNull();
    }
  
    @Test
    public void resolveStyleSingleReferentialStyle() {
      Map<String, TtmlStyle> globalStyles = getGlobalStyles();
      String[] styleIds = {"s0"};
  
      assertThat(TtmlRenderUtil.resolveStyle(null, styleIds, globalStyles))
          .isSameInstanceAs(globalStyles.get("s0"));
    }
  
    @Test
    public void resolveStyleMultipleReferentialStyles() {
      Map<String, TtmlStyle> globalStyles = getGlobalStyles();
      String[] styleIds = {"s0", "s1"};
  
      TtmlStyle resolved = TtmlRenderUtil.resolveStyle(null, styleIds, globalStyles);
      assertThat(resolved).isNotSameInstanceAs(globalStyles.get("s0"));
      assertThat(resolved).isNotSameInstanceAs(globalStyles.get("s1"));
      assertThat(resolved.getId()).isNull();
  
      // inherited from s0
      assertThat(resolved.getBackgroundColor()).isEqualTo(BLACK);
      // inherited from s1
      assertThat(resolved.getFontColor()).isEqualTo(RED);
      // merged from s0 and s1
      assertThat(resolved.getStyle()).isEqualTo(STYLE_BOLD_ITALIC);
    }
  
    @Test
    public void resolveMergeSingleReferentialStyleIntoInlineStyle() {
      Map<String, TtmlStyle> globalStyles = getGlobalStyles();
      String[] styleIds = {"s0"};
      TtmlStyle style = new TtmlStyle();
      style.setBackgroundColor(Color.YELLOW);
  
      TtmlStyle resolved = TtmlRenderUtil.resolveStyle(style, styleIds, globalStyles);
      assertThat(resolved).isSameInstanceAs(style);
  
      // inline attribute not overridden
      assertThat(resolved.getBackgroundColor()).isEqualTo(YELLOW);
      // inherited from referential style
      assertThat(resolved.getStyle()).isEqualTo(STYLE_BOLD);
    }
  
    @Test
    public void resolveMergeMultipleReferentialStylesIntoInlineStyle() {
      Map<String, TtmlStyle> globalStyles = getGlobalStyles();
      String[] styleIds = {"s0", "s1"};
      TtmlStyle style = new TtmlStyle();
      style.setBackgroundColor(Color.YELLOW);
  
      TtmlStyle resolved = TtmlRenderUtil.resolveStyle(style, styleIds, globalStyles);
      assertThat(resolved).isSameInstanceAs(style);
  
      // inline attribute not overridden
      assertThat(resolved.getBackgroundColor()).isEqualTo(YELLOW);
      // inherited from both referential style
      assertThat(resolved.getStyle()).isEqualTo(STYLE_BOLD_ITALIC);
    }
  
    @Test
    public void resolveStyleOnlyInlineStyle() {
      TtmlStyle inlineStyle = new TtmlStyle();
      assertThat(TtmlRenderUtil.resolveStyle(inlineStyle, null, null)).isSameInstanceAs(inlineStyle);
    }
  
    private static Map<String, TtmlStyle> getGlobalStyles() {
      Map<String, TtmlStyle> globalStyles = new HashMap<>();
  
      TtmlStyle s0 = new TtmlStyle();
      s0.setId("s0");
      s0.setBackgroundColor(Color.BLACK);
      s0.setBold(true);
      globalStyles.put(s0.getId(), s0);
  
      TtmlStyle s1 = new TtmlStyle();
      s1.setId("s1");
      s1.setBackgroundColor(Color.RED);
      s1.setFontColor(Color.RED);
      s1.setItalic(true);
      globalStyles.put(s1.getId(), s1);
  
      return globalStyles;
    }
  }
  