Fix the RichInputConnectionAndTextRangeTests

Change from sentence seperator to sentence terminator has broken
this tests.

Change-Id: I303a2e703c46191b481b7d32213f165bd00aaaa2
diff --git a/tests/src/com/android/inputmethod/latin/RichInputConnectionAndTextRangeTests.java b/tests/src/com/android/inputmethod/latin/RichInputConnectionAndTextRangeTests.java
index 8614ccc..08779b9 100644
--- a/tests/src/com/android/inputmethod/latin/RichInputConnectionAndTextRangeTests.java
+++ b/tests/src/com/android/inputmethod/latin/RichInputConnectionAndTextRangeTests.java
@@ -206,10 +206,14 @@
                 "abc def .", mSpacingAndPunctuations, 1), NgramContext.BEGINNING_OF_SENTENCE);
         assertEquals(NgramContextUtils.getNgramContextFromNthPreviousWord(
                 "abc, def", mSpacingAndPunctuations, 2), NgramContext.EMPTY_PREV_WORDS_INFO);
+        // question mark is treated as the end of the sentence. Hence, beginning of the
+        // sentence is expected.
         assertEquals(NgramContextUtils.getNgramContextFromNthPreviousWord(
-                "abc? def", mSpacingAndPunctuations, 2), NgramContext.EMPTY_PREV_WORDS_INFO);
+                "abc? def", mSpacingAndPunctuations, 2), NgramContext.BEGINNING_OF_SENTENCE);
+        // Exclamation mark is treated as the end of the sentence. Hence, beginning of the
+        // sentence is expected.
         assertEquals(NgramContextUtils.getNgramContextFromNthPreviousWord(
-                "abc! def", mSpacingAndPunctuations, 2), NgramContext.EMPTY_PREV_WORDS_INFO);
+                "abc! def", mSpacingAndPunctuations, 2), NgramContext.BEGINNING_OF_SENTENCE);
         assertEquals(NgramContextUtils.getNgramContextFromNthPreviousWord(
                 "abc 'def", mSpacingAndPunctuations, 2), NgramContext.EMPTY_PREV_WORDS_INFO);
     }