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Unified Diff: base/android/javatests/src/org/chromium/base/ObserverListTest.java

Issue 1647803004: Move base to DEPS (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
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Index: base/android/javatests/src/org/chromium/base/ObserverListTest.java
diff --git a/base/android/javatests/src/org/chromium/base/ObserverListTest.java b/base/android/javatests/src/org/chromium/base/ObserverListTest.java
deleted file mode 100644
index 973682b9328c0ff534bb58146387e395a4580311..0000000000000000000000000000000000000000
--- a/base/android/javatests/src/org/chromium/base/ObserverListTest.java
+++ /dev/null
@@ -1,326 +0,0 @@
-// Copyright 2013 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.base;
-
-import android.test.InstrumentationTestCase;
-import android.test.suitebuilder.annotation.SmallTest;
-
-import org.chromium.base.test.util.Feature;
-
-import java.util.Iterator;
-import java.util.NoSuchElementException;
-
-/**
- * Tests for (@link ObserverList}.
- */
-public class ObserverListTest extends InstrumentationTestCase {
- interface Observer {
- void observe(int x);
- }
-
- private static class Foo implements Observer {
- private final int mScalar;
- private int mTotal = 0;
-
- Foo(int scalar) {
- mScalar = scalar;
- }
-
- @Override
- public void observe(int x) {
- mTotal += x * mScalar;
- }
- }
-
- /**
- * An observer which add a given Observer object to the list when observe is called.
- */
- private static class FooAdder implements Observer {
- private final ObserverList<Observer> mList;
- private final Observer mLucky;
-
- FooAdder(ObserverList<Observer> list, Observer oblivious) {
- mList = list;
- mLucky = oblivious;
- }
-
- @Override
- public void observe(int x) {
- mList.addObserver(mLucky);
- }
- }
-
- /**
- * An observer which removes a given Observer object from the list when observe is called.
- */
- private static class FooRemover implements Observer {
- private final ObserverList<Observer> mList;
- private final Observer mDoomed;
-
- FooRemover(ObserverList<Observer> list, Observer innocent) {
- mList = list;
- mDoomed = innocent;
- }
-
- @Override
- public void observe(int x) {
- mList.removeObserver(mDoomed);
- }
- }
-
- private static <T> int getSizeOfIterable(Iterable<T> iterable) {
- int num = 0;
- for (T el : iterable) num++;
- return num;
- }
-
- @SmallTest
- @Feature({"Android-AppBase"})
- public void testRemoveWhileIteration() {
- ObserverList<Observer> observerList = new ObserverList<Observer>();
- Foo a = new Foo(1);
- Foo b = new Foo(-1);
- Foo c = new Foo(1);
- Foo d = new Foo(-1);
- Foo e = new Foo(-1);
- FooRemover evil = new FooRemover(observerList, c);
-
- observerList.addObserver(a);
- observerList.addObserver(b);
-
- for (Observer obs : observerList) obs.observe(10);
-
- // Removing an observer not in the list should do nothing.
- observerList.removeObserver(e);
-
- observerList.addObserver(evil);
- observerList.addObserver(c);
- observerList.addObserver(d);
-
- for (Observer obs : observerList) obs.observe(10);
-
- // observe should be called twice on a.
- assertEquals(20, a.mTotal);
- // observe should be called twice on b.
- assertEquals(-20, b.mTotal);
- // evil removed c from the observerList before it got any callbacks.
- assertEquals(0, c.mTotal);
- // observe should be called once on d.
- assertEquals(-10, d.mTotal);
- // e was never added to the list, observe should not be called.
- assertEquals(0, e.mTotal);
- }
-
- @SmallTest
- @Feature({"Android-AppBase"})
- public void testAddWhileIteration() {
- ObserverList<Observer> observerList = new ObserverList<Observer>();
- Foo a = new Foo(1);
- Foo b = new Foo(-1);
- Foo c = new Foo(1);
- FooAdder evil = new FooAdder(observerList, c);
-
- observerList.addObserver(evil);
- observerList.addObserver(a);
- observerList.addObserver(b);
-
- for (Observer obs : observerList) obs.observe(10);
-
- assertTrue(observerList.hasObserver(c));
- assertEquals(10, a.mTotal);
- assertEquals(-10, b.mTotal);
- assertEquals(0, c.mTotal);
- }
-
- @SmallTest
- @Feature({"Android-AppBase"})
- public void testIterator() {
- ObserverList<Integer> observerList = new ObserverList<Integer>();
- observerList.addObserver(5);
- observerList.addObserver(10);
- observerList.addObserver(15);
- assertEquals(3, getSizeOfIterable(observerList));
-
- observerList.removeObserver(10);
- assertEquals(2, getSizeOfIterable(observerList));
-
- Iterator<Integer> it = observerList.iterator();
- assertTrue(it.hasNext());
- assertTrue(5 == it.next());
- assertTrue(it.hasNext());
- assertTrue(15 == it.next());
- assertFalse(it.hasNext());
-
- boolean removeExceptionThrown = false;
- try {
- it.remove();
- fail("Expecting UnsupportedOperationException to be thrown here.");
- } catch (UnsupportedOperationException e) {
- removeExceptionThrown = true;
- }
- assertTrue(removeExceptionThrown);
- assertEquals(2, getSizeOfIterable(observerList));
-
- boolean noElementExceptionThrown = false;
- try {
- it.next();
- fail("Expecting NoSuchElementException to be thrown here.");
- } catch (NoSuchElementException e) {
- noElementExceptionThrown = true;
- }
- assertTrue(noElementExceptionThrown);
- }
-
- @SmallTest
- @Feature({"Android-AppBase"})
- public void testRewindableIterator() {
- ObserverList<Integer> observerList = new ObserverList<Integer>();
- observerList.addObserver(5);
- observerList.addObserver(10);
- observerList.addObserver(15);
- assertEquals(3, getSizeOfIterable(observerList));
-
- ObserverList.RewindableIterator<Integer> it = observerList.rewindableIterator();
- assertTrue(it.hasNext());
- assertTrue(5 == it.next());
- assertTrue(it.hasNext());
- assertTrue(10 == it.next());
- assertTrue(it.hasNext());
- assertTrue(15 == it.next());
- assertFalse(it.hasNext());
-
- it.rewind();
-
- assertTrue(it.hasNext());
- assertTrue(5 == it.next());
- assertTrue(it.hasNext());
- assertTrue(10 == it.next());
- assertTrue(it.hasNext());
- assertTrue(15 == it.next());
- assertEquals(5, (int) observerList.mObservers.get(0));
- observerList.removeObserver(5);
- assertEquals(null, observerList.mObservers.get(0));
-
- it.rewind();
-
- assertEquals(10, (int) observerList.mObservers.get(0));
- assertTrue(it.hasNext());
- assertTrue(10 == it.next());
- assertTrue(it.hasNext());
- assertTrue(15 == it.next());
- }
-
- @SmallTest
- @Feature({"Android-AppBase"})
- public void testAddObserverReturnValue() {
- ObserverList<Object> observerList = new ObserverList<Object>();
-
- Object a = new Object();
- assertTrue(observerList.addObserver(a));
- assertFalse(observerList.addObserver(a));
-
- Object b = new Object();
- assertTrue(observerList.addObserver(b));
- assertFalse(observerList.addObserver(null));
- }
-
- @SmallTest
- @Feature({"Android-AppBase"})
- public void testRemoveObserverReturnValue() {
- ObserverList<Object> observerList = new ObserverList<Object>();
-
- Object a = new Object();
- Object b = new Object();
- observerList.addObserver(a);
- observerList.addObserver(b);
-
- assertTrue(observerList.removeObserver(a));
- assertFalse(observerList.removeObserver(a));
- assertFalse(observerList.removeObserver(new Object()));
- assertTrue(observerList.removeObserver(b));
- assertFalse(observerList.removeObserver(null));
-
- // If we remove an object while iterating, it will be replaced by 'null'.
- observerList.addObserver(a);
- assertTrue(observerList.removeObserver(a));
- assertFalse(observerList.removeObserver(null));
- }
-
- @SmallTest
- @Feature({"Android-AppBase"})
- public void testSize() {
- ObserverList<Object> observerList = new ObserverList<Object>();
-
- assertEquals(0, observerList.size());
- assertTrue(observerList.isEmpty());
-
- observerList.addObserver(null);
- assertEquals(0, observerList.size());
- assertTrue(observerList.isEmpty());
-
- Object a = new Object();
- observerList.addObserver(a);
- assertEquals(1, observerList.size());
- assertFalse(observerList.isEmpty());
-
- observerList.addObserver(a);
- assertEquals(1, observerList.size());
- assertFalse(observerList.isEmpty());
-
- observerList.addObserver(null);
- assertEquals(1, observerList.size());
- assertFalse(observerList.isEmpty());
-
- Object b = new Object();
- observerList.addObserver(b);
- assertEquals(2, observerList.size());
- assertFalse(observerList.isEmpty());
-
- observerList.removeObserver(null);
- assertEquals(2, observerList.size());
- assertFalse(observerList.isEmpty());
-
- observerList.removeObserver(new Object());
- assertEquals(2, observerList.size());
- assertFalse(observerList.isEmpty());
-
- observerList.removeObserver(b);
- assertEquals(1, observerList.size());
- assertFalse(observerList.isEmpty());
-
- observerList.removeObserver(b);
- assertEquals(1, observerList.size());
- assertFalse(observerList.isEmpty());
-
- observerList.removeObserver(a);
- assertEquals(0, observerList.size());
- assertTrue(observerList.isEmpty());
-
- observerList.removeObserver(a);
- observerList.removeObserver(b);
- observerList.removeObserver(null);
- observerList.removeObserver(new Object());
- assertEquals(0, observerList.size());
- assertTrue(observerList.isEmpty());
-
- observerList.addObserver(new Object());
- observerList.addObserver(new Object());
- observerList.addObserver(new Object());
- observerList.addObserver(a);
- assertEquals(4, observerList.size());
- assertFalse(observerList.isEmpty());
-
- observerList.clear();
- assertEquals(0, observerList.size());
- assertTrue(observerList.isEmpty());
-
- observerList.removeObserver(a);
- observerList.removeObserver(b);
- observerList.removeObserver(null);
- observerList.removeObserver(new Object());
- assertEquals(0, observerList.size());
- assertTrue(observerList.isEmpty());
- }
-}
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