introspectionhelpertest.java

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/*
 *  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;

import junit.framework.TestCase;
import junit.framework.AssertionFailedError;
import java.io.File;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import org.apache.tools.ant.taskdefs.condition.Os;

/**
 * JUnit 3 testcases for org.apache.tools.ant.IntrospectionHelper.
 *
 */

public class IntrospectionHelperTest extends TestCase {

    private Project p;
    private IntrospectionHelper ih;
    private static final String projectBasedir = File.separator;

    public IntrospectionHelperTest(String name) {
        super(name);
    }

    public void setUp() {
        p = new Project();
        p.setBasedir(projectBasedir);
        ih = IntrospectionHelper.getHelper(getClass());
    }

    public void testIsDynamic() {
        assertTrue("Not dynamic", false == ih.isDynamic());
    }

    public void testIsContainer() {
        assertTrue("Not a container", false == ih.isContainer());
    }

    public void testAddText() throws BuildException {
        ih.addText(p, this, "test");
        try {
            ih.addText(p, this, "test2");
            fail("test2 shouldn\'t be equal to test");
        } catch (BuildException be) {
            assertTrue(be.getException() instanceof AssertionFailedError);
        }

        ih = IntrospectionHelper.getHelper(String.class);
        try {
            ih.addText(p, "", "test");
            fail("String doesn\'t support addText");
        } catch (BuildException be) {
        }
    }

    public void testGetAddTextMethod() {
        Method m = ih.getAddTextMethod();
        assertMethod(m, "addText", String.class, "test", "bing!");

        ih = IntrospectionHelper.getHelper(String.class);
        try {
            m = ih.getAddTextMethod();
        } catch (BuildException e) {}
    }

    public void testSupportsCharacters() {
        assertTrue("IntrospectionHelperTest supports addText",
                   ih.supportsCharacters());

        ih = IntrospectionHelper.getHelper(String.class);
        assertTrue("String doesn\'t support addText", !ih.supportsCharacters());
    }

    public void addText(String text) {
        assertEquals("test", text);
    }

    public void testElementCreators() throws BuildException {
        try {
            ih.getElementType("one");
            fail("don't have element type one");
        } catch (BuildException be) {
        }
        try {
            ih.getElementType("two");
            fail("createTwo takes arguments");
        } catch (BuildException be) {
        }
        try {
            ih.getElementType("three");
            fail("createThree returns void");
        } catch (BuildException be) {
        }
        try {
            ih.getElementType("four");
            fail("createFour returns array");
        } catch (BuildException be) {
        }
        try {
            ih.getElementType("five");
            fail("createFive returns primitive type");
        } catch (BuildException be) {
        }
        assertEquals(String.class, ih.getElementType("six"));
        assertEquals("test", ih.createElement(p, this, "six"));

        try {
            ih.getElementType("seven");
            fail("addSeven takes two arguments");
        } catch (BuildException be) {
        }
        try {
            ih.getElementType("eight");
            fail("addEight takes no arguments");
        } catch (BuildException be) {
        }
        try {
            ih.getElementType("nine");
            fail("nine return non void");
        } catch (BuildException be) {
        }
        try {
            ih.getElementType("ten");
            fail("addTen takes array argument");
        } catch (BuildException be) {
        }
        try {
            ih.getElementType("eleven");
            fail("addEleven takes primitive argument");
        } catch (BuildException be) {
        }
        try {
            ih.getElementType("twelve");
            fail("no primitive constructor for java.lang.Class");
        } catch (BuildException be) {
        }
        assertEquals(StringBuffer.class, ih.getElementType("thirteen"));
        assertEquals("test", ih.createElement(p, this, "thirteen").toString());

        try {
            ih.createElement(p, this, "fourteen");
            fail("fourteen throws NullPointerException");
        } catch (BuildException be) {
            assertTrue(be.getException() instanceof NullPointerException);
        }

        try {
            ih.createElement(p, this, "fourteen");
            fail("fifteen throws NullPointerException");
        } catch (BuildException be) {
            assertTrue(be.getException() instanceof NullPointerException);
        }
    }

    private Map getExpectedNestedElements() {
        Map elemMap = new Hashtable();
        elemMap.put("six", String.class);
        elemMap.put("thirteen", StringBuffer.class);
        elemMap.put("fourteen", StringBuffer.class);
        elemMap.put("fifteen", StringBuffer.class);
        return elemMap;
    }

    public void testGetNestedElements() {
        Map elemMap = getExpectedNestedElements();
        Enumeration e = ih.getNestedElements();
        while (e.hasMoreElements()) {
            String name = (String) e.nextElement();
            Class expect = (Class) elemMap.get(name);
            assertNotNull("Support for "+name+" in IntrospectioNHelperTest?",
                          expect);
            assertEquals("Return type of "+name, expect, ih.getElementType(name));
            elemMap.remove(name);
        }
        assertTrue("Found all", elemMap.isEmpty());
    }

    public void testGetNestedElementMap() {
        Map elemMap = getExpectedNestedElements();
        Map actualMap = ih.getNestedElementMap();
        for (Iterator i = actualMap.entrySet().iterator(); i.hasNext();) {
            Map.Entry entry = (Map.Entry) i.next();
            String elemName = (String) entry.getKey();
            Class elemClass = (Class) elemMap.get(elemName);
            assertNotNull("Support for " + elemName +
                          " in IntrospectionHelperTest?", elemClass);
            assertEquals("Type of " + elemName, elemClass, entry.getValue());
            elemMap.remove(elemName);
        }
        assertTrue("Found all", elemMap.isEmpty());

        // Check it's a read-only map.
        try {
            actualMap.clear();
        } catch (UnsupportedOperationException e) {}
    }

    public void testGetElementMethod() {
        assertElemMethod("six", "createSix", String.class, null);
        assertElemMethod("thirteen", "addThirteen", null, StringBuffer.class);
        assertElemMethod("fourteen", "addFourteen", null, StringBuffer.class);
        assertElemMethod("fifteen", "createFifteen", StringBuffer.class, null);
    }

    private void assertElemMethod(String elemName, String methodName,
                                  Class returnType, Class methodArg) {
        Method m = ih.getElementMethod(elemName);
        assertEquals("Method name", methodName, m.getName());
        Class expectedReturnType = (returnType == null)? Void.TYPE: returnType;
        assertEquals("Return type", expectedReturnType, m.getReturnType());
        Class[] args = m.getParameterTypes();
        if (methodArg != null) {
            assertEquals("Arg Count", 1, args.length);
            assertEquals("Arg Type", methodArg, args[0]);
        } else {
            assertEquals("Arg Count", 0, args.length);
        }
    }

    public Object createTwo(String s) {
        return null;
    }

    public void createThree() {}

    public Object[] createFour() {
        return null;
    }

    public int createFive() {
        return 0;
    }

    public String createSix() {
        return "test";
    }

    public StringBuffer createFifteen() {
        throw new NullPointerException();
    }

    public void addSeven(String s, String s2) {}

    public void addEight() {}

    public String addNine(String s) {
        return null;
    }

    public void addTen(String[] s) {}

    public void addEleven(int i) {}

    public void addTwelve(Class c) {}

    public void addThirteen(StringBuffer sb) {
        sb.append("test");
    }

    public void addFourteen(StringBuffer s) {
        throw new NullPointerException();
    }

    public void testAttributeSetters() throws BuildException {
        try {
            ih.setAttribute(p, this, "one", "test");
            fail("setOne doesn't exist");
        } catch (BuildException be) {
        }
        try {
            ih.setAttribute(p, this, "two", "test");
            fail("setTwo returns non void");
        } catch (BuildException be) {
        }
        try {
            ih.setAttribute(p, this, "three", "test");
            fail("setThree takes no args");
        } catch (BuildException be) {
        }
        try {
            ih.setAttribute(p, this, "four", "test");
            fail("setFour takes two args");
        } catch (BuildException be) {
        }
        try {
            ih.setAttribute(p, this, "five", "test");
            fail("setFive takes array arg");
        } catch (BuildException be) {
        }
        try {
            ih.setAttribute(p, this, "six", "test");
            fail("Project doesn't have a String constructor");
        } catch (BuildException be) {
        }
        ih.setAttribute(p, this, "seven", "2");
        try {
            ih.setAttribute(p, this, "seven", "3");
            fail("2 shouldn't be equals to three");
        } catch (BuildException be) {
            assertTrue(be.getException() instanceof AssertionFailedError);
        }
        ih.setAttribute(p, this, "eight", "2");
        try {
            ih.setAttribute(p, this, "eight", "3");
            fail("2 shouldn't be equals to three - as int");
        } catch (BuildException be) {
            assertTrue(be.getException() instanceof AssertionFailedError);
        }
        ih.setAttribute(p, this, "nine", "2");
        try {
            ih.setAttribute(p, this, "nine", "3");
            fail("2 shouldn't be equals to three - as Integer");
        } catch (BuildException be) {
            assertTrue(be.getException() instanceof AssertionFailedError);
        }
        ih.setAttribute(p, this, "ten", "2");
        try {
            ih.setAttribute(p, this, "ten", "3");