1 files changed, 174 insertions, 0 deletions
diff --git a/guava-tests/test/com/google/common/testing/TearDownStackTest.java b/guava-tests/test/com/google/common/testing/TearDownStackTest.java
new file mode 100644
index 0000000..ee26536
--- /dev/null
+++ b/guava-tests/test/com/google/common/testing/TearDownStackTest.java
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.common.testing;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+import com.google.common.annotations.GwtCompatible;
+
+import junit.framework.TestCase;
+
+import org.junit.Test;
+
+/**
+ * @author Luiz-Otavio "Z" Zorzella
+ */
+@GwtCompatible
+public class TearDownStackTest extends TestCase {
+
+  private TearDownStack tearDownStack = new TearDownStack();
+
+  @Test
+  public void testSingleTearDown() throws Exception {
+    final TearDownStack stack = buildTearDownStack();
+
+    final SimpleTearDown tearDown = new SimpleTearDown();
+    stack.addTearDown(tearDown);
+
+    assertEquals(false, tearDown.ran);
+
+    stack.runTearDown();
+
+    assertEquals("tearDown should have run", true, tearDown.ran);
+  }
+
+  @Test
+  public void testMultipleTearDownsHappenInOrder() throws Exception {
+    final TearDownStack stack = buildTearDownStack();
+
+    final SimpleTearDown tearDownOne = new SimpleTearDown();
+    stack.addTearDown(tearDownOne);
+
+    final Callback callback = new Callback() {
+      @Override
+      public void run() {
+        assertEquals("tearDownTwo should have been run before tearDownOne",
+          false, tearDownOne.ran);
+      }
+    };
+
+    final SimpleTearDown tearDownTwo = new SimpleTearDown(callback);
+    stack.addTearDown(tearDownTwo);
+
+    assertEquals(false, tearDownOne.ran);
+    assertEquals(false, tearDownTwo.ran);
+
+    stack.runTearDown();
+
+    assertEquals("tearDownOne should have run", true, tearDownOne.ran);
+    assertEquals("tearDownTwo should have run", true, tearDownTwo.ran);
+  }
+
+  @Test
+  public void testThrowingTearDown() throws Exception {
+    final TearDownStack stack = buildTearDownStack();
+
+    final ThrowingTearDown tearDownOne = new ThrowingTearDown("one");
+    stack.addTearDown(tearDownOne);
+
+    final ThrowingTearDown tearDownTwo = new ThrowingTearDown("two");
+    stack.addTearDown(tearDownTwo);
+
+    assertEquals(false, tearDownOne.ran);
+    assertEquals(false, tearDownTwo.ran);
+
+    try {
+      stack.runTearDown();
+      fail("runTearDown should have thrown an exception");
+    } catch (ClusterException expected) {
+      assertEquals("two", expected.getCause().getMessage());
+    } catch (RuntimeException e) {
+      throw new RuntimeException(
+        "A ClusterException should have been thrown, rather than a " + e.getClass().getName(), e);
+    }
+
+    assertEquals(true, tearDownOne.ran);
+    assertEquals(true, tearDownTwo.ran);
+  }
+
+  @Override public final void runBare() throws Throwable {
+    try {
+      setUp();
+      runTest();
+    } finally {
+      tearDown();
+    }
+  }
+
+  @Override protected void tearDown() {
+    tearDownStack.runTearDown();
+  }
+
+  /**
+   * Builds a {@link TearDownStack} that makes sure it's clear by the end of
+   * this test.
+   */
+  private TearDownStack buildTearDownStack() {
+    final TearDownStack result = new TearDownStack();
+    tearDownStack.addTearDown(new TearDown() {
+
+      @Override
+      public void tearDown() throws Exception {
+        assertEquals(
+          "The test should have cleared the stack (say, by virtue of running runTearDown)",
+          0, result.stack.size());
+      }
+    });
+    return result;
+  }
+
+  private static final class ThrowingTearDown implements TearDown {
+
+    private final String id;
+    boolean ran = false;
+
+    ThrowingTearDown(String id) {
+      this.id = id;
+    }
+
+    @Override
+    public void tearDown() throws Exception {
+      ran = true;
+      throw new RuntimeException(id);
+    }
+  }
+
+  private static final class SimpleTearDown implements TearDown {
+
+    boolean ran = false;
+    Callback callback = null;
+
+    public SimpleTearDown() {}
+
+    public SimpleTearDown(Callback callback) {
+      this.callback = callback;
+    }
+
+    @Override
+    public void tearDown() throws Exception {
+      if (callback != null) {
+        callback.run();
+      }
+      ran = true;
+    }
+  }
+
+  private interface Callback {
+    void run();
+  }
+}