Upstream oodles of Chrome for Android code into Chromium.

chrome/android/javatests/src/org/chromium/chrome/browser/signin/SigninHelperTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/signin/SigninHelperTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/signin/SigninHelperTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/signin/SigninHelperTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..7664a38553af36e393b92b3e310e465a22384cd4
--- /dev/null
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/signin/SigninHelperTest.java
@@ -0,0 +1,146 @@
+// Copyright 2015 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.signin;
+
+import android.content.Context;
+import android.test.InstrumentationTestCase;
+import android.test.suitebuilder.annotation.SmallTest;
+
+import org.chromium.base.test.util.AdvancedMockContext;
+import org.chromium.sync.signin.ChromeSigninController;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Instrumentation tests for {@link SigninHelper}.
+ */
+public class SigninHelperTest extends InstrumentationTestCase {
+    private AdvancedMockContext mContext;
+    private MockChangeEventChecker mEventChecker;
+
+    @Override
+    public void setUp() {
+        mContext = new AdvancedMockContext(getInstrumentation().getTargetContext());
+        mEventChecker = new MockChangeEventChecker();
+    }
+
+    @SmallTest
+    public void testAccountsChangedPref() {
+        assertEquals("Should never return true before the pref has ever been set.",
+                false, SigninHelper.checkAndClearAccountsChangedPref(mContext));
+        assertEquals("Should never return true before the pref has ever been set.",
+                false, SigninHelper.checkAndClearAccountsChangedPref(mContext));
+
+        // Mark the pref as set.
+        SigninHelper.markAccountsChangedPref(mContext);
+
+        assertEquals("Should return true first time after marking accounts changed",
+                true, SigninHelper.checkAndClearAccountsChangedPref(mContext));
+        assertEquals("Should only return true first time after marking accounts changed",
+                false, SigninHelper.checkAndClearAccountsChangedPref(mContext));
+        assertEquals("Should only return true first time after marking accounts changed",
+                false, SigninHelper.checkAndClearAccountsChangedPref(mContext));
+
+        // Mark the pref as set again.
+        SigninHelper.markAccountsChangedPref(mContext);
+
+        assertEquals("Should return true first time after marking accounts changed",
+                true, SigninHelper.checkAndClearAccountsChangedPref(mContext));
+        assertEquals("Should only return true first time after marking accounts changed",
+                false, SigninHelper.checkAndClearAccountsChangedPref(mContext));
+        assertEquals("Should only return true first time after marking accounts changed",
+                false, SigninHelper.checkAndClearAccountsChangedPref(mContext));
+    }
+
+    @SmallTest
+    public void testSimpleAccountRename() {
+        setSignedInAccountName("A");
+        mEventChecker.insertRenameEvent("A", "B");
+        SigninHelper.updateAccountRenameData(mContext, mEventChecker);
+        assertEquals("B", getNewSignedInAccountName());
+    }
+
+    @SmallTest
+    public void testNotSignedInAccountRename() {
+        setSignedInAccountName("A");
+        mEventChecker.insertRenameEvent("B", "C");
+        SigninHelper.updateAccountRenameData(mContext, mEventChecker);
+        assertEquals(null, getNewSignedInAccountName());
+    }
+
+    @SmallTest
+    public void testSimpleAccountRenameTwice() {
+        setSignedInAccountName("A");
+        mEventChecker.insertRenameEvent("A", "B");
+        SigninHelper.updateAccountRenameData(mContext, mEventChecker);
+        assertEquals("B", getNewSignedInAccountName());
+        mEventChecker.insertRenameEvent("B", "C");
+        SigninHelper.updateAccountRenameData(mContext, mEventChecker);
+        assertEquals("C", getNewSignedInAccountName());
+    }
+
+    @SmallTest
+    public void testNotSignedInAccountRename2() {
+        setSignedInAccountName("A");
+        mEventChecker.insertRenameEvent("B", "C");
+        mEventChecker.insertRenameEvent("C", "D");
+        SigninHelper.updateAccountRenameData(mContext, mEventChecker);
+        assertEquals(null, getNewSignedInAccountName());
+    }
+
+    @SmallTest
+    public void testChainedAccountRename2() {
+        setSignedInAccountName("A");
+        mEventChecker.insertRenameEvent("Z", "Y"); // Unrelated.
+        mEventChecker.insertRenameEvent("A", "B");
+        mEventChecker.insertRenameEvent("Y", "X"); // Unrelated.
+        mEventChecker.insertRenameEvent("B", "C");
+        mEventChecker.insertRenameEvent("C", "D");
+        SigninHelper.updateAccountRenameData(mContext, mEventChecker);
+        assertEquals("D", getNewSignedInAccountName());
+    }
+
+    private void setSignedInAccountName(String account) {
+        ChromeSigninController.get(mContext).setSignedInAccountName(account);
+    }
+
+    private String getSignedInAccountName() {
+        return ChromeSigninController.get(mContext).getSignedInAccountName();
+    }
+
+    private String getNewSignedInAccountName() {
+        return SigninHelper.getNewSignedInAccountName(mContext);
+    }
+
+    private static final class MockChangeEventChecker
+            implements SigninHelper.AccountChangeEventChecker {
+        private Map<String, List<String>> mEvents =
+                new HashMap<String, List<String>>();
+
+        @Override
+        public List<String> getAccountChangeEvents(
+                Context context, int index, String accountName) {
+            List<String> eventsList = getEventList(accountName);
+            return eventsList.subList(index, eventsList.size());
+        }
+
+        private void insertRenameEvent(String from, String to) {
+            List<String> eventsList = getEventList(from);
+            eventsList.add(to);
+        }
+
+        private List<String> getEventList(String account) {
+            List<String> eventsList = mEvents.get(account);
+            if (eventsList == null) {
+                eventsList = new ArrayList<String>();
+                mEvents.put(account, eventsList);
+            }
+            return eventsList;
+        }
+    }
+}