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Posted to commits@struts.apache.org by lu...@apache.org on 2022/11/27 08:24:54 UTC

[struts] 11/23: WW-5233 Copies Tiles Autotag related tests

This is an automated email from the ASF dual-hosted git repository.

lukaszlenart pushed a commit to branch WW-5233-tiles
in repository https://gitbox.apache.org/repos/asf/struts.git

commit 3eeb2885bf84c223dbcceb6c9ae3a7b24c68ab97
Author: Lukasz Lenart <lu...@apache.org>
AuthorDate: Sun Oct 2 14:53:17 2022 +0200

    WW-5233 Copies Tiles Autotag related tests
---
 .../tiles/autotag/model/TemplateClassTest.java     | 153 +++++++++++++++++++
 .../tiles/autotag/model/TemplateMethodTest.java    | 132 +++++++++++++++++
 .../tiles/autotag/model/TemplateParameterTest.java |  88 +++++++++++
 .../tiles/autotag/model/TemplateSuiteTest.java     | 112 ++++++++++++++
 .../autotag/runtime/AbstractModelBodyTest.java     | 164 +++++++++++++++++++++
 .../tiles/autotag/runtime/util/NullWriterTest.java |  71 +++++++++
 6 files changed, 720 insertions(+)

diff --git a/plugins/tiles/src/test/java/org/apache/tiles/autotag/model/TemplateClassTest.java b/plugins/tiles/src/test/java/org/apache/tiles/autotag/model/TemplateClassTest.java
new file mode 100644
index 000000000..1b875c37d
--- /dev/null
+++ b/plugins/tiles/src/test/java/org/apache/tiles/autotag/model/TemplateClassTest.java
@@ -0,0 +1,153 @@
+/*
+ * 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.tiles.autotag.model;
+
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.List;
+
+import static org.easymock.EasyMock.createMock;
+import static org.easymock.EasyMock.expect;
+import static org.easymock.EasyMock.replay;
+import static org.easymock.EasyMock.verify;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.assertTrue;
+
+public class TemplateClassTest {
+
+    /**
+     * Test method for {@link TemplateClass#TemplateClass(String)}.
+     */
+    @Test
+    public void testTemplateConstructor1() {
+        TemplateClass templateClass = new TemplateClass("name");
+        assertEquals("name", templateClass.getName());
+        assertNull(templateClass.getTagName());
+        assertNull(templateClass.getTagClassPrefix());
+        assertNull(templateClass.getExecuteMethod());
+        Collection<TemplateParameter> params = templateClass.getParameters();
+        assertTrue(params.isEmpty());
+    }
+
+    /**
+     * Test method for {@link TemplateClass#TemplateClass(String, String, String, TemplateMethod)}.
+     */
+    @Test
+    public void testTemplateConstructor2() {
+        TemplateMethod method = createMock(TemplateMethod.class);
+
+        replay(method);
+        TemplateClass templateClass = new TemplateClass("name", "tagName", "tagClassPrefix", method);
+        assertEquals("name", templateClass.getName());
+        assertEquals("tagName", templateClass.getTagName());
+        assertEquals("tagClassPrefix", templateClass.getTagClassPrefix());
+        assertEquals(method, templateClass.getExecuteMethod());
+        verify(method);
+    }
+
+    /**
+     * Test method for {@link TemplateClass#getSimpleName()}.
+     */
+    @Test
+    public void testGetSimpleName() {
+        TemplateClass templateClass = new TemplateClass("name");
+        assertEquals("name", templateClass.getSimpleName());
+        templateClass = new TemplateClass("org.whatever.Hello");
+        assertEquals("Hello", templateClass.getSimpleName());
+    }
+
+    /**
+     * Test method for {@link TemplateClass#setDocumentation(String)}.
+     */
+    @Test
+    public void testSetDocumentation() {
+        TemplateClass templateClass = new TemplateClass("name");
+        templateClass.setDocumentation("docs");
+        assertEquals("docs", templateClass.getDocumentation());
+    }
+
+    /**
+     * Test method for {@link TemplateClass#getParameters()}.
+     */
+    @Test
+    public void testGetParameters() {
+        TemplateParameter param1 = createMock(TemplateParameter.class);
+        TemplateParameter param2 = createMock(TemplateParameter.class);
+        TemplateParameter param3 = createMock(TemplateParameter.class);
+        TemplateParameter param4 = createMock(TemplateParameter.class);
+        TemplateMethod method = createMock(TemplateMethod.class);
+        List<TemplateParameter> params = new ArrayList<>();
+
+        expect(method.getParameters()).andReturn(params);
+        expect(param1.isRequest()).andReturn(true);
+        expect(param2.isRequest()).andReturn(false);
+        expect(param2.isBody()).andReturn(true);
+        expect(param3.isRequest()).andReturn(false);
+        expect(param3.isBody()).andReturn(false);
+        expect(param4.isRequest()).andReturn(false);
+        expect(param4.isBody()).andReturn(false);
+        expect(param3.getName()).andReturn("param1");
+        expect(param4.getName()).andReturn("param2");
+
+        replay(param1, param2, param3, param4, method);
+        params.add(param1);
+        params.add(param2);
+        params.add(param3);
+        params.add(param4);
+
+        TemplateClass templateClass = new TemplateClass("name", "tagName", "tagClassPrefix", method);
+        Collection<TemplateParameter> returnedParams = templateClass.getParameters();
+        Iterator<TemplateParameter> paramIt = returnedParams.iterator();
+        assertSame(param3, paramIt.next());
+        assertSame(param4, paramIt.next());
+        assertFalse(paramIt.hasNext());
+        verify(param1, param2, param3, param4, method);
+    }
+
+    /**
+     * Test method for {@link TemplateClass#hasBody()}.
+     */
+    @Test
+    public void testHasBody() {
+        TemplateMethod method = createMock(TemplateMethod.class);
+        expect(method.hasBody()).andReturn(true);
+
+        replay(method);
+        TemplateClass templateClass = new TemplateClass("name", "tagName", "tagClassPrefix", method);
+        assertTrue(templateClass.hasBody());
+        verify(method);
+    }
+
+    /**
+     * Test method for {@link TemplateClass#toString()}.
+     */
+    @Test
+    public void testToString() {
+        TemplateMethod method = new TemplateMethod("method", new ArrayList<>());
+        TemplateClass templateClass = new TemplateClass("name", "tagName", "tagClassPrefix", method);
+        assertEquals("TemplateClass [name=name, tagName=tagName, tagClassPrefix=tagClassPrefix, " + "documentation=null, executeMethod=TemplateMethod " + "[name=method, documentation=null, parameters={}]]", templateClass.toString());
+    }
+
+}
diff --git a/plugins/tiles/src/test/java/org/apache/tiles/autotag/model/TemplateMethodTest.java b/plugins/tiles/src/test/java/org/apache/tiles/autotag/model/TemplateMethodTest.java
new file mode 100644
index 000000000..e6ad8b181
--- /dev/null
+++ b/plugins/tiles/src/test/java/org/apache/tiles/autotag/model/TemplateMethodTest.java
@@ -0,0 +1,132 @@
+/*
+ * 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.tiles.autotag.model;
+
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import static org.easymock.EasyMock.createMock;
+import static org.easymock.EasyMock.expect;
+import static org.easymock.EasyMock.replay;
+import static org.easymock.EasyMock.verify;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests {@link TemplateMethod}.
+ */
+public class TemplateMethodTest {
+
+    /**
+     * Tests {@link TemplateMethod#TemplateMethod(String, Iterable)}.
+     */
+    @Test
+    public void testTemplateMethod() {
+        TemplateParameter param1 = createMock(TemplateParameter.class);
+        TemplateParameter param2 = createMock(TemplateParameter.class);
+
+        expect(param1.getName()).andReturn("param1");
+        expect(param2.getName()).andReturn("param2");
+
+        replay(param1, param2);
+        List<TemplateParameter> parameters = new ArrayList<>();
+        parameters.add(param1);
+        parameters.add(param2);
+
+        TemplateMethod method = new TemplateMethod("method", parameters);
+        assertEquals("method", method.getName());
+        Iterator<TemplateParameter> params = method.getParameters().iterator();
+        assertSame(param1, params.next());
+        assertSame(param2, params.next());
+        assertFalse(params.hasNext());
+        assertSame(param1, method.getParameterByName("param1"));
+        assertSame(param2, method.getParameterByName("param2"));
+        verify(param1, param2);
+    }
+
+    /**
+     * Tests {@link TemplateMethod#setDocumentation(String)}.
+     */
+    @Test
+    public void testSetDocumentation() {
+        TemplateMethod method = new TemplateMethod("method", new ArrayList<>());
+        method.setDocumentation("docs");
+        assertEquals("docs", method.getDocumentation());
+    }
+
+    /**
+     * Tests {@link TemplateMethod#hasBody()}.
+     */
+    @Test
+    public void testHasBody() {
+        TemplateParameter param1 = createMock(TemplateParameter.class);
+        TemplateParameter param2 = createMock(TemplateParameter.class);
+
+        expect(param1.getName()).andReturn("param1");
+        expect(param2.getName()).andReturn("param2");
+        expect(param1.isBody()).andReturn(true);
+
+        replay(param1, param2);
+        List<TemplateParameter> parameters = new ArrayList<>();
+        parameters.add(param1);
+        parameters.add(param2);
+
+        TemplateMethod method = new TemplateMethod("method", parameters);
+        assertTrue(method.hasBody());
+        verify(param1, param2);
+    }
+
+    /**
+     * Tests {@link TemplateMethod#hasBody()}.
+     */
+    @Test
+    public void testHasBody2() {
+        TemplateParameter param1 = createMock(TemplateParameter.class);
+        TemplateParameter param2 = createMock(TemplateParameter.class);
+
+        expect(param1.getName()).andReturn("param1");
+        expect(param2.getName()).andReturn("param2");
+        expect(param1.isBody()).andReturn(false);
+        expect(param2.isBody()).andReturn(false);
+
+        replay(param1, param2);
+        List<TemplateParameter> parameters = new ArrayList<>();
+        parameters.add(param1);
+        parameters.add(param2);
+
+        TemplateMethod method = new TemplateMethod("method", parameters);
+        assertFalse(method.hasBody());
+        verify(param1, param2);
+    }
+
+    /**
+     * Tests {@link TemplateMethod#toString()}.
+     */
+    @Test
+    public void testToString() {
+        TemplateMethod method = new TemplateMethod("method", new ArrayList<>());
+        assertEquals("TemplateMethod [name=method, documentation=null, parameters={}]", method.toString());
+    }
+
+}
diff --git a/plugins/tiles/src/test/java/org/apache/tiles/autotag/model/TemplateParameterTest.java b/plugins/tiles/src/test/java/org/apache/tiles/autotag/model/TemplateParameterTest.java
new file mode 100644
index 000000000..efa486950
--- /dev/null
+++ b/plugins/tiles/src/test/java/org/apache/tiles/autotag/model/TemplateParameterTest.java
@@ -0,0 +1,88 @@
+/*
+ * 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.tiles.autotag.model;
+
+import org.apache.tiles.autotag.core.runtime.ModelBody;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests {@link TemplateParameter}.
+ */
+public class TemplateParameterTest {
+
+    @Test
+    public void testTemplateParameter() {
+        TemplateParameter parameter = new TemplateParameter("name", "exportedName", "type", "defaultValue", true, false);
+        assertEquals("name", parameter.getName());
+        assertEquals("exportedName", parameter.getExportedName());
+        assertEquals("type", parameter.getType());
+        assertEquals("defaultValue", parameter.getDefaultValue());
+        assertTrue(parameter.isRequired());
+        assertEquals("ExportedName", parameter.getGetterSetterSuffix());
+        assertFalse(parameter.isBody());
+        assertFalse(parameter.isRequest());
+
+        parameter = new TemplateParameter("name", "exportedName", "my.Request", "defaultValue", false, true);
+        assertEquals("name", parameter.getName());
+        assertEquals("exportedName", parameter.getExportedName());
+        assertEquals("my.Request", parameter.getType());
+        assertEquals("defaultValue", parameter.getDefaultValue());
+        assertFalse(parameter.isRequired());
+        assertEquals("ExportedName", parameter.getGetterSetterSuffix());
+        assertFalse(parameter.isBody());
+        assertTrue(parameter.isRequest());
+
+        parameter = new TemplateParameter("name", "exportedName", ModelBody.class.getName(), "defaultValue", false, false);
+        assertEquals("name", parameter.getName());
+        assertEquals("exportedName", parameter.getExportedName());
+        assertEquals(ModelBody.class.getName(), parameter.getType());
+        assertEquals("defaultValue", parameter.getDefaultValue());
+        assertFalse(parameter.isRequired());
+        assertEquals("ExportedName", parameter.getGetterSetterSuffix());
+        assertTrue(parameter.isBody());
+        assertFalse(parameter.isRequest());
+    }
+
+    /**
+     * Tests {@link TemplateParameter#setDocumentation(String)}.
+     */
+    @Test
+    public void testSetDocumentation() {
+        TemplateParameter parameter = new TemplateParameter("name", "exportedName", "type", "defaultValue", true, false);
+        parameter.setDocumentation("docs");
+        assertEquals("docs", parameter.getDocumentation());
+    }
+
+    /**
+     * Tests {@link TemplateParameter#toString()}.
+     */
+    @Test
+    public void testToString() {
+        TemplateParameter parameter = new TemplateParameter("name", "exportedName", "type", "defaultValue", true, false);
+        assertEquals(
+            "TemplateParameter [name=name, exportedName=exportedName, "
+                + "documentation=null, type=type, defaultValue=defaultValue, required=true, request=false]",
+            parameter.toString());
+    }
+
+}
diff --git a/plugins/tiles/src/test/java/org/apache/tiles/autotag/model/TemplateSuiteTest.java b/plugins/tiles/src/test/java/org/apache/tiles/autotag/model/TemplateSuiteTest.java
new file mode 100644
index 000000000..cdb5c5216
--- /dev/null
+++ b/plugins/tiles/src/test/java/org/apache/tiles/autotag/model/TemplateSuiteTest.java
@@ -0,0 +1,112 @@
+/*
+ * 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.tiles.autotag.model;
+
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import static org.easymock.EasyMock.createMock;
+import static org.easymock.EasyMock.expect;
+import static org.easymock.EasyMock.replay;
+import static org.easymock.EasyMock.verify;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests {@link TemplateSuite}.
+ */
+public class TemplateSuiteTest {
+
+    /**
+     * Test method for {@link TemplateSuite#TemplateSuite(String, String)}.
+     */
+    @Test
+    public void testTemplateSuiteConstructor1() {
+        TemplateSuite suite = new TemplateSuite("name", "docs");
+        assertEquals("name", suite.getName());
+        assertEquals("docs", suite.getDocumentation());
+        assertTrue(suite.getTemplateClasses().isEmpty());
+    }
+
+    /**
+     * Test method for {@link TemplateSuite#TemplateSuite(String, String, Iterable)}.
+     */
+    @Test
+    public void testTemplateSuiteConstructor2() {
+        TemplateClass class1 = createMock(TemplateClass.class);
+        TemplateClass class2 = createMock(TemplateClass.class);
+        expect(class1.getName()).andReturn("class1");
+        expect(class2.getName()).andReturn("class2");
+
+        replay(class1, class2);
+        List<TemplateClass> classes = new ArrayList<>();
+        classes.add(class1);
+        classes.add(class2);
+        TemplateSuite suite = new TemplateSuite("name", "docs", classes);
+        assertEquals("name", suite.getName());
+        assertEquals("docs", suite.getDocumentation());
+        Iterator<TemplateClass> clazzes = suite.getTemplateClasses().iterator();
+        assertSame(class1, clazzes.next());
+        assertSame(class2, clazzes.next());
+        assertFalse(clazzes.hasNext());
+        assertSame(class1, suite.getTemplateClassByName("class1"));
+        assertSame(class2, suite.getTemplateClassByName("class2"));
+        verify(class1, class2);
+    }
+
+    /**
+     * Test method for {@link TemplateSuite#addTemplateClass(TemplateClass)}.
+     */
+    @Test
+    public void testAddTemplateClass() {
+        TemplateClass class1 = createMock(TemplateClass.class);
+        TemplateClass class2 = createMock(TemplateClass.class);
+        expect(class1.getName()).andReturn("class1");
+        expect(class2.getName()).andReturn("class2");
+
+        replay(class1, class2);
+        TemplateSuite suite = new TemplateSuite("name", "docs");
+        assertEquals("name", suite.getName());
+        assertEquals("docs", suite.getDocumentation());
+        assertTrue(suite.getTemplateClasses().isEmpty());
+        suite.addTemplateClass(class1);
+        suite.addTemplateClass(class2);
+        Iterator<TemplateClass> clazzes = suite.getTemplateClasses().iterator();
+        assertSame(class1, clazzes.next());
+        assertSame(class2, clazzes.next());
+        assertFalse(clazzes.hasNext());
+        assertSame(class1, suite.getTemplateClassByName("class1"));
+        assertSame(class2, suite.getTemplateClassByName("class2"));
+        verify(class1, class2);
+    }
+
+    /**
+     * Test method for {@link TemplateSuite#toString()}.
+     */
+    @Test
+    public void testToString() {
+        TemplateSuite suite = new TemplateSuite("name", "docs");
+        assertEquals("TemplateSuite [name=name, documentation=docs, templateClasses={}]", suite.toString());
+    }
+}
diff --git a/plugins/tiles/src/test/java/org/apache/tiles/autotag/runtime/AbstractModelBodyTest.java b/plugins/tiles/src/test/java/org/apache/tiles/autotag/runtime/AbstractModelBodyTest.java
new file mode 100644
index 000000000..08e4d9011
--- /dev/null
+++ b/plugins/tiles/src/test/java/org/apache/tiles/autotag/runtime/AbstractModelBodyTest.java
@@ -0,0 +1,164 @@
+/*
+ * 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.tiles.autotag.runtime;
+
+import org.apache.tiles.autotag.core.runtime.AbstractModelBody;
+import org.apache.tiles.autotag.core.runtime.util.NullWriter;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.io.StringWriter;
+import java.io.Writer;
+
+import static org.easymock.EasyMock.createMock;
+import static org.easymock.EasyMock.createMockBuilder;
+import static org.easymock.EasyMock.expectLastCall;
+import static org.easymock.EasyMock.isA;
+import static org.easymock.EasyMock.replay;
+import static org.easymock.EasyMock.verify;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+/**
+ * Tests {@link AbstractModelBody}.
+ *
+ * @version $Rev$ $Date$
+ */
+public class AbstractModelBodyTest {
+
+    /**
+     * Test method for {@link AbstractModelBody#evaluate()}.
+     *
+     * @throws IOException If something goes wrong.
+     */
+    @Test
+    public void testEvaluate() throws IOException {
+        Writer writer = createMock(Writer.class);
+        AbstractModelBody modelBody = createMockBuilder(AbstractModelBody.class).withConstructor(writer).createMock();
+
+        modelBody.evaluate(writer);
+
+        replay(writer, modelBody);
+        modelBody.evaluate();
+        verify(writer, modelBody);
+    }
+
+    /**
+     * Test method for {@link AbstractModelBody#evaluateAsString()}.
+     *
+     * @throws IOException If something goes wrong.
+     */
+    @Test
+    public void testEvaluateAsString() throws IOException {
+        AbstractModelBody modelBody = new MockModelBody(null, "return me");
+        assertEquals("return me", modelBody.evaluateAsString());
+
+        modelBody = new MockModelBody(null, "\n   \n");
+        assertNull(modelBody.evaluateAsString());
+    }
+
+    /**
+     * Test method for {@link AbstractModelBody#evaluateAsString()}.
+     *
+     * @throws IOException If something goes wrong.
+     */
+    @Test(expected = IOException.class)
+    public void testEvaluateAsStringException() throws IOException {
+        Writer writer = createMock(Writer.class);
+        AbstractModelBody modelBody = createMockBuilder(AbstractModelBody.class).withConstructor(writer).createMock();
+
+        modelBody.evaluate(isA(StringWriter.class));
+        expectLastCall().andThrow(new IOException());
+
+        replay(writer, modelBody);
+        try {
+            modelBody.evaluateAsString();
+        } finally {
+            verify(writer, modelBody);
+        }
+    }
+
+    /**
+     * Test method for {@link AbstractModelBody#evaluateWithoutWriting()}.
+     *
+     * @throws IOException If something goes wrong.
+     */
+    @Test
+    public void testEvaluateWithoutWriting() throws IOException {
+        Writer writer = createMock(Writer.class);
+        AbstractModelBody modelBody = createMockBuilder(AbstractModelBody.class).withConstructor(writer).createMock();
+
+        modelBody.evaluate(isA(NullWriter.class));
+
+        replay(writer, modelBody);
+        modelBody.evaluateWithoutWriting();
+        verify(writer, modelBody);
+    }
+
+    /**
+     * Test method for {@link AbstractModelBody#evaluateWithoutWriting()}.
+     *
+     * @throws IOException If something goes wrong.
+     */
+    @Test(expected = IOException.class)
+    public void testEvaluateWithoutWritingException() throws IOException {
+        Writer writer = createMock(Writer.class);
+        AbstractModelBody modelBody = createMockBuilder(AbstractModelBody.class).withConstructor(writer).createMock();
+
+        modelBody.evaluate(isA(NullWriter.class));
+        expectLastCall().andThrow(new IOException());
+
+        replay(writer, modelBody);
+        try {
+            modelBody.evaluateWithoutWriting();
+        } finally {
+            verify(writer, modelBody);
+        }
+    }
+
+    /**
+     * A mock model body.
+     *
+     * @version $Rev$ $Date$
+     */
+    public static class MockModelBody extends AbstractModelBody {
+
+        /**
+         * The result to return.
+         */
+        private final String toReturn;
+
+        /**
+         * Constructor.
+         *
+         * @param defaultWriter The default writer.
+         * @param toReturn      The result to return.
+         */
+        public MockModelBody(Writer defaultWriter, String toReturn) {
+            super(defaultWriter);
+            this.toReturn = toReturn;
+        }
+
+        @Override
+        public void evaluate(Writer writer) throws IOException {
+            writer.write(toReturn);
+        }
+
+    }
+}
diff --git a/plugins/tiles/src/test/java/org/apache/tiles/autotag/runtime/util/NullWriterTest.java b/plugins/tiles/src/test/java/org/apache/tiles/autotag/runtime/util/NullWriterTest.java
new file mode 100644
index 000000000..00f6b452c
--- /dev/null
+++ b/plugins/tiles/src/test/java/org/apache/tiles/autotag/runtime/util/NullWriterTest.java
@@ -0,0 +1,71 @@
+/*
+ * 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.tiles.autotag.runtime.util;
+
+import org.apache.tiles.autotag.core.runtime.util.NullWriter;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * Tests {@link NullWriter}.
+ */
+public class NullWriterTest {
+
+    /**
+     * A dummy size.
+     */
+    private static final int DUMMY_SIZE = 15;
+    /**
+     * The object to test.
+     */
+    private NullWriter writer;
+
+    /**
+     * Sets up the test.
+     */
+    @Before
+    public void setUp() {
+        writer = new NullWriter();
+    }
+
+    /**
+     * Test method for {@link NullWriter#write(char[], int, int)}.
+     */
+    @Test
+    public void testWriteCharArrayIntInt() {
+        writer.write("Hello there".toCharArray(), 0, DUMMY_SIZE);
+    }
+
+    /**
+     * Test method for {@link NullWriter#flush()}.
+     */
+    @Test
+    public void testFlush() {
+        writer.flush();
+    }
+
+    /**
+     * Test method for {@link NullWriter#close()}.
+     */
+    @Test
+    public void testClose() {
+        writer.close();
+    }
+
+}