Add a test case for backspace at start of line

Tests the behavior from
Bug: 5784542

Change-Id: I78ec9d77c5dd1e3ea8eff530f9d7d284a1c094d4

1 files changed, 12 insertions, 0 deletions

diff --git a/tests/src/com/android/inputmethod/latin/InputLogicTests.java b/tests/src/com/android/inputmethod/latin/InputLogicTests.java
index 7b87be6d3..8b4f64aa1 100644
--- a/tests/src/com/android/inputmethod/latin/InputLogicTests.java
+++ b/tests/src/com/android/inputmethod/latin/InputLogicTests.java
@@ -191,5 +191,17 @@ public class InputLogicTests extends ServiceTestCase<LatinIME> {
         type(STRING_TO_TYPE);
         type(Keyboard.CODE_DELETE);
         assertEquals("double space make a period", EXPECTED_RESULT, mTextView.getText().toString());
+
+    public void testBackspaceAtStartAfterAutocorrect() {
+        final String STRING_TO_TYPE = "tgis ";
+        final String EXPECTED_RESULT = "this ";
+        final int NEW_CURSOR_POSITION = 0;
+        type(STRING_TO_TYPE);
+        mLatinIME.onUpdateSelection(0, 0, STRING_TO_TYPE.length(), STRING_TO_TYPE.length(), -1, -1);
+        mInputConnection.setSelection(NEW_CURSOR_POSITION, NEW_CURSOR_POSITION);
+        mLatinIME.onUpdateSelection(0, 0, NEW_CURSOR_POSITION, NEW_CURSOR_POSITION, -1, -1);
+        type(Keyboard.CODE_DELETE);
+        assertEquals("auto correct then move curor to start of line then backspace",
+                EXPECTED_RESULT, mTextView.getText().toString());
     }
 }