Fix broken unit test in TtmlDecoder.textEmphasis()

- Merge RUBY_POSITION with TEXT_EMPHASIS_POSITION in TtmlNode

library/core/src/main/java/com/google/android/exoplayer2/text/ttml/TextEmphasis.java

@@ -55,20 +55,19 @@ import java.util.Set;
       MARK_AUTO
   })
 
-  /* package */ @interface Mark {
+  @interface Mark {
   }
 
   /**
    * The mark style of the text emphasis.
    */
-  /* package */@Mark
-  final int mark;
+  @Mark final int mark;
 
   /**
    *  Position to be resolved at rendering time. Hence, it is not defined in
    *  {@link TextAnnotation.Position}
    */
-  public static final int POSITION_OUTSIDE = 1 << 8;
+  static final int POSITION_OUTSIDE = 1 << 8;
 
   @Documented
   @Retention(SOURCE)
@@ -78,13 +77,12 @@ import java.util.Set;
       // Extending the definition in TextAnnotation.Position for intermediate values
       POSITION_OUTSIDE
   })
-  public @interface Position {}
+  @interface Position {}
 
   /**
    * The position of the text emphasis relative to the base text.
    */
-  @Position
-  public final int position;
+  @Position final int position;
 
   private static Set markValues = ImmutableSet.of(
       TtmlNode.TEXT_EMPHASIS_AUTO,
@@ -99,9 +97,9 @@ import java.util.Set;
   );
 
   private static Set positionValues = ImmutableSet.of(
-      TtmlNode.TEXT_EMPHASIS_POSITION_AFTER,
-      TtmlNode.TEXT_EMPHASIS_POSITION_BEFORE,
-      TtmlNode.TEXT_EMPHASIS_POSITION_OUTSIDE
+      TtmlNode.ANNOTATION_POSITION_AFTER,
+      TtmlNode.ANNOTATION_POSITION_BEFORE,
+      TtmlNode.ANNOTATION_POSITION_OUTSIDE
   );
 
   private TextEmphasis(@Mark int mark, @TextAnnotation.Position int position) {
@@ -175,13 +173,13 @@ import java.util.Set;
     @Position int position = POSITION_OUTSIDE;
     if (positionSet.size() == 1) {
       switch ((String) positionSet.iterator().next()) {
-        case TtmlNode.TEXT_EMPHASIS_POSITION_AFTER:
+        case TtmlNode.ANNOTATION_POSITION_AFTER:
           position = TextAnnotation.POSITION_AFTER;
           break;
-        case TtmlNode.TEXT_EMPHASIS_POSITION_OUTSIDE:
+        case TtmlNode.ANNOTATION_POSITION_OUTSIDE:
           position = POSITION_OUTSIDE;
           break;
-        case TtmlNode.TEXT_EMPHASIS_POSITION_BEFORE:
+        case TtmlNode.ANNOTATION_POSITION_BEFORE:
         default:
           position = TextAnnotation.POSITION_BEFORE;
       }

library/core/src/main/java/com/google/android/exoplayer2/text/ttml/TtmlDecoder.java

@@ -582,10 +582,10 @@ public final class TtmlDecoder extends SimpleSubtitleDecoder {
           break;
         case TtmlNode.ATTR_TTS_RUBY_POSITION:
           switch (Util.toLowerInvariant(attributeValue)) {
-            case TtmlNode.RUBY_BEFORE:
+            case TtmlNode.ANNOTATION_POSITION_BEFORE:
               style = createIfNull(style).setRubyPosition(TextAnnotation.POSITION_BEFORE);
               break;
-            case TtmlNode.RUBY_AFTER:
+            case TtmlNode.ANNOTATION_POSITION_AFTER:
               style = createIfNull(style).setRubyPosition(TextAnnotation.POSITION_AFTER);
               break;
             default:

library/core/src/main/java/com/google/android/exoplayer2/text/ttml/TtmlNode.java

@@ -80,9 +80,11 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
   public static final String RUBY_TEXT_CONTAINER = "textContainer";
   public static final String RUBY_DELIMITER = "delimiter";
 
-  // Values for rubyPosition
-  public static final String RUBY_BEFORE = "before";
-  public static final String RUBY_AFTER = "after";
+  // Values for text annotation (i.e. ruby, text emphasis) position
+  public static final String ANNOTATION_POSITION_BEFORE = "before";
+  public static final String ANNOTATION_POSITION_AFTER = "after";
+  public static final String ANNOTATION_POSITION_OUTSIDE = "outside";
+
   // Values for textDecoration
   public static final String LINETHROUGH = "linethrough";
   public static final String NO_LINETHROUGH = "nolinethrough";
@@ -116,10 +118,6 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
   public static final String TEXT_EMPHASIS_MARK_FILLED = "filled";
   public static final String TEXT_EMPHASIS_MARK_OPEN = "open";
 
-  public static final String TEXT_EMPHASIS_POSITION_AFTER = "after";
-  public static final String TEXT_EMPHASIS_POSITION_BEFORE = "before";
-  public static final String TEXT_EMPHASIS_POSITION_OUTSIDE = "outside";
-
   @Nullable public final String tag;
   @Nullable public final String text;
   public final boolean isTextNode;

testutils/src/main/java/com/google/android/exoplayer2/testutil/truth/SpannedSubject.java

@@ -1218,6 +1218,25 @@ public final class SpannedSubject extends Subject {
         this.position = position;
       }
 
+      @Override
+      public boolean equals(@Nullable Object o) {
+        if (this == o) {
+          return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+          return false;
+        }
+
+        TextEmphasisSubject.MarkAndPosition that = (TextEmphasisSubject.MarkAndPosition) o;
+        return (position == that.position) && (mark == that.mark);
+      }
+
+      @Override
+      public int hashCode() {
+        int result = 34613 * mark + position;
+        return result;
+      }
+
       @Override
       public String toString() {
         return String.format("{mark=%s,position=%s}", mark, position);