Refactor autocomplete-specific logic into a separate class

chrome/android/junit/src/org/chromium/chrome/browser/omnibox/AutocompleteEditTextTest.java

Index: chrome/android/junit/src/org/chromium/chrome/browser/omnibox/AutocompleteEditTextTest.java
diff --git a/chrome/android/junit/src/org/chromium/chrome/browser/omnibox/AutocompleteEditTextTest.java b/chrome/android/junit/src/org/chromium/chrome/browser/omnibox/AutocompleteEditTextTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..499c6305cf0579d11051642a1dc443953b920d9d
--- /dev/null
+++ b/chrome/android/junit/src/org/chromium/chrome/browser/omnibox/AutocompleteEditTextTest.java
@@ -0,0 +1,125 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+package org.chromium.chrome.browser.omnibox;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.inOrder;
+import static org.mockito.Mockito.spy;
+
+import android.content.Context;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+import android.view.inputmethod.BaseInputConnection;
+import android.view.inputmethod.InputConnection;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InOrder;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+import org.robolectric.shadows.ShadowLog;
+
+import org.chromium.base.Log;
+import org.chromium.testing.local.LocalRobolectricTestRunner;
+
+/**
+ * A robolectric test for {@link AutocompleteEditText} class.
+ */
+@RunWith(LocalRobolectricTestRunner.class)
+@Config(manifest = Config.NONE)
+public class AutocompleteEditTextTest {
+    private static final String TAG = "cr_AutocompleteEdit";
+    private static final boolean DEBUG = false;
+
+    private InOrder mInOrder;
+    private AutocompleteEditText mAutocomplete;
+    private Context mContext;
+    private InputConnection mInputConnection;
+    private BaseInputConnection mDummyTargetInputConnection;
+    private AutocompleteEmbedder mEmbedder;
+
+    // This is needed to limit the target of inOrder#verify.
+    private static class AutocompleteEmbedder {
+        public void onAutocompleteTextStateChanged(boolean textDeleted, boolean updateDisplay) {
+            if (DEBUG) Log.i(TAG, "onAutocompleteTextStateChanged");
+        }
+    }
+
+    private static class TestAutocompleteEditText extends AutocompleteEditText {
+        private AutocompleteEmbedder mEmbedder;
+
+        public TestAutocompleteEditText(
+                AutocompleteEmbedder embedder, Context context, AttributeSet attrs) {
+            super(context, attrs);
+            mEmbedder = embedder;
+        }
+
+        @Override
+        public void onAutocompleteTextStateChanged(boolean textDeleted, boolean updateDisplay) {
+            // This function is called in super(), so mEmbedder may be null.
+            if (mEmbedder != null) {
+                mEmbedder.onAutocompleteTextStateChanged(textDeleted, updateDisplay);
+            }
+        }
+
+        @Override
+        public boolean hasFocus() {
+            return true;
+        }
+    }
+
+    @Before
+    public void setUp() throws Exception {
+        ShadowLog.stream = System.out;
+        if (DEBUG) Log.i(TAG, "setUp started.");
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+        mEmbedder = spy(new AutocompleteEmbedder());
+        mAutocomplete = spy(new TestAutocompleteEditText(mEmbedder, mContext, null));
+        assertNotNull(mAutocomplete);
+        // Note: this cannot catch the first {@link
+        // AutocompleteEditText#onAutocompleteTextStateChanged(boolean, boolean)}, which is caused
+        // by View constructor's call to setText().
+        mInOrder = inOrder(mEmbedder);
+        mDummyTargetInputConnection = new BaseInputConnection(mAutocomplete, true);
+        mInputConnection = mAutocomplete.createInputConnection(mDummyTargetInputConnection);
+        assertNotNull(mInputConnection);
+        mInOrder.verifyNoMoreInteractions();
+        if (DEBUG) Log.i(TAG, "setUp finished.");
+    }
+
+    private void assertTexts(String userText, String autocompleteText) {
+        assertEquals(userText, mAutocomplete.getTextWithoutAutocomplete());
+        assertEquals(userText + autocompleteText, mAutocomplete.getTextWithAutocomplete());
+        assertEquals(autocompleteText.length(), mAutocomplete.getAutocompleteLength());
+        assertEquals(!TextUtils.isEmpty(autocompleteText), mAutocomplete.hasAutocomplete());
+    }
+
+    @Test
+    public void testAppend_CommitText() {
+        // Feeder should call this at the beginning.
+        mAutocomplete.setIgnoreTextChangesForAutocomplete(false);
+        // User types "h".
+        assertTrue(mInputConnection.commitText("h", 1));
+        // User types "hello".
+        assertTrue(mInputConnection.commitText("ello", 1));
+        mInOrder.verifyNoMoreInteractions();
+        // The controller kicks in.
+        mAutocomplete.setAutocompleteText("hello", " world");
+        assertTexts("hello", " world");
+        assertFalse(mInputConnection.beginBatchEdit());
+        assertTrue(mInputConnection.commitText(" ", 1));
+        mInOrder.verify(mEmbedder).onAutocompleteTextStateChanged(false, false);
+        assertTexts("hello ", "world");
+        assertFalse(mInputConnection.endBatchEdit());
+        mAutocomplete.setAutocompleteText("hello ", "world");
+        assertTexts("hello ", "world");
+        mInOrder.verifyNoMoreInteractions();
+    }
+}