1 files changed, 186 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/tests/junit/org/apache/tools/ant/types/resources/LazyResourceCollectionTest.java b/framework/src/ant/apache-ant-1.9.6/src/tests/junit/org/apache/tools/ant/types/resources/LazyResourceCollectionTest.java
new file mode 100644
index 00000000..f91077a6
--- /dev/null
+++ b/framework/src/ant/apache-ant-1.9.6/src/tests/junit/org/apache/tools/ant/types/resources/LazyResourceCollectionTest.java
@@ -0,0 +1,186 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You 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 org.apache.tools.ant.types.resources;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.NoSuchElementException;
+
+
+import org.apache.tools.ant.types.Resource;
+import org.apache.tools.ant.types.ResourceCollection;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+public class LazyResourceCollectionTest {
+
+    private class StringResourceCollection implements ResourceCollection {
+        List resources = Arrays.<Resource>asList();
+
+        List createdIterators = new ArrayList();
+
+        public int size() {
+            return resources.size();
+        }
+
+        public Iterator<Resource> iterator() {
+            StringResourceIterator it = new StringResourceIterator();
+            createdIterators.add(it);
+            return it;
+        }
+
+        public boolean isFilesystemOnly() {
+            return false;
+        }
+    }
+
+    private class StringResourceIterator implements Iterator {
+        int cursor = 0;
+
+        public void remove() {
+            throw new UnsupportedOperationException();
+        }
+
+        public Object next() {
+            if (cursor < 3) {
+                cursor++;
+                return new StringResource("r" + cursor);
+            }
+            return null;
+        }
+
+        public boolean hasNext() {
+            return cursor < 3;
+        }
+    }
+
+    @Test
+    public void testLazyLoading() throws Exception {
+        StringResourceCollection collectionTest = new StringResourceCollection();
+        LazyResourceCollectionWrapper lazyCollection = new LazyResourceCollectionWrapper();
+        lazyCollection.add(collectionTest);
+
+        Iterator<Resource> it = lazyCollection.iterator();
+        assertOneCreatedIterator(collectionTest);
+        StringResourceIterator stringResourceIterator = (StringResourceIterator) collectionTest.createdIterators
+                .get(0);
+        assertEquals("A resource was loaded without iterating", 1,
+                stringResourceIterator.cursor);
+
+        StringResource r = (StringResource) it.next();
+        assertOneCreatedIterator(collectionTest);
+        assertEquals("r1", r.getValue());
+        assertEquals("Iterating once load more than 1 resource", 2,
+                stringResourceIterator.cursor);
+
+        r = (StringResource) it.next();
+        assertOneCreatedIterator(collectionTest);
+        assertEquals("r2", r.getValue());
+        assertEquals("Iterating twice load more than 2 resources", 3,
+                stringResourceIterator.cursor);
+
+        r = (StringResource) it.next();
+        assertOneCreatedIterator(collectionTest);
+        assertEquals("r3", r.getValue());
+        assertEquals("Iterating 3 times load more than 3 resources", 3,
+                stringResourceIterator.cursor);
+
+        try {
+            it.next();
+            fail("NoSuchElementException should have been raised");
+        } catch (NoSuchElementException e) {
+            // ok
+        }
+    }
+
+    private void assertOneCreatedIterator(
+            StringResourceCollection testCollection) {
+        assertEquals("More than one iterator has been created", 1,
+                testCollection.createdIterators.size());
+    }
+
+    @Test
+    public void testCaching() throws Exception {
+        StringResourceCollection collectionTest = new StringResourceCollection();
+        LazyResourceCollectionWrapper lazyCollection = new LazyResourceCollectionWrapper();
+        lazyCollection.add(collectionTest);
+
+        assertTrue(lazyCollection.isCache());
+        Iterator<Resource> it1 = lazyCollection.iterator();
+        assertOneCreatedIterator(collectionTest);
+        Iterator<Resource> it2 = lazyCollection.iterator();
+        assertOneCreatedIterator(collectionTest);
+
+        StringResourceIterator stringResourceIterator = (StringResourceIterator) collectionTest.createdIterators
+                .get(0);
+        assertEquals("A resource was loaded without iterating", 1,
+                stringResourceIterator.cursor);
+
+        StringResource r = (StringResource) it1.next();
+        assertEquals("r1", r.getValue());
+        assertEquals("Iterating once load more than 1 resource", 2,
+                stringResourceIterator.cursor);
+
+        r = (StringResource) it2.next();
+        assertEquals("r1", r.getValue());
+        assertEquals(
+                "The second iterator did not lookup in the cache for a resource",
+                2, stringResourceIterator.cursor);
+
+        r = (StringResource) it2.next();
+        assertEquals("r2", r.getValue());
+        assertEquals("Iterating twice load more than 2 resources", 3,
+                stringResourceIterator.cursor);
+
+        r = (StringResource) it1.next();
+        assertEquals("r2", r.getValue());
+        assertEquals(
+                "The first iterator did not lookup in the cache for a resource",
+                3, stringResourceIterator.cursor);
+
+        r = (StringResource) it2.next();
+        assertEquals("r3", r.getValue());
+        assertEquals("Iterating 3 times load more than 3 resources", 3,
+                stringResourceIterator.cursor);
+
+        r = (StringResource) it1.next();
+        assertEquals("r3", r.getValue());
+        assertEquals(
+                "The first iterator did not lookup in the cache for a resource",
+                3, stringResourceIterator.cursor);
+
+        try {
+            it1.next();
+            fail("NoSuchElementException should have been raised");
+        } catch (NoSuchElementException e) {
+            // ok
+        }
+
+        try {
+            it2.next();
+            fail("NoSuchElementException should have been raised");
+        } catch (NoSuchElementException e) {
+            // ok
+        }
+    }
+}