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Android example source code file (TestCaseUtil.java)

This example Android source code file (TestCaseUtil.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

android, collect, collections, enumeration, google, hashset, illegalaccessexception, instantiationexception, list, nosuchmethodexception, object, reflection, set, string, suppresswarnings, test, testcase, testcaseutil, testsuite, util

The TestCaseUtil.java Android example source code

/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * 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 android.test;

import com.google.android.collect.Lists;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import junit.runner.BaseTestRunner;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

/**
 * @hide - This is part of a framework that is under development and should not be used for
 * active development.
 */
public class TestCaseUtil {

    private TestCaseUtil() {
    }

    @SuppressWarnings("unchecked")
    public static List<String> getTestCaseNames(Test test, boolean flatten) {
        List<Test> tests = (List) getTests(test, flatten);
        List<String> testCaseNames = Lists.newArrayList();
        for (Test aTest : tests) {
            testCaseNames.add(getTestName(aTest));
        }
        return testCaseNames;
    }

    public static List<? extends Test> getTests(Test test, boolean flatten) {
        return getTests(test, flatten, new HashSet<Class());
    }

    private static List<? extends Test> getTests(Test test, boolean flatten,
            Set<Class seen) {
        List<Test> testCases = Lists.newArrayList();
        if (test != null) {

            Test workingTest = null;
            /*
             * If we want to run a single TestCase method only, we must not
             * invoke the suite() method, because we will run all test methods
             * of the class then.
             */
            if (test instanceof TestCase &&
                    ((TestCase)test).getName() == null) {
                workingTest = invokeSuiteMethodIfPossible(test.getClass(), 
                        seen);
            }
            if (workingTest == null) {
                workingTest = test;
            }

            if (workingTest instanceof TestSuite) {
                TestSuite testSuite = (TestSuite) workingTest;
                Enumeration enumeration = testSuite.tests();
                while (enumeration.hasMoreElements()) {
                    Test childTest = (Test) enumeration.nextElement();
                    if (flatten) {
                        testCases.addAll(getTests(childTest, flatten, seen));
                    } else {
                        testCases.add(childTest);
                    }
                }
            } else {
                testCases.add(workingTest);
            }
        }
        return testCases;
    }

    private static Test invokeSuiteMethodIfPossible(Class testClass,
            Set<Class seen) {
        try {
            Method suiteMethod = testClass.getMethod(
                    BaseTestRunner.SUITE_METHODNAME, new Class[0]);
            /*
             * Additional check necessary: If a TestCase contains a suite()
             * method that returns a TestSuite including the TestCase itself,
             * we need to stop the recursion. We use a set of classes to
             * remember which classes' suite() methods were already invoked.
             */
            if (Modifier.isStatic(suiteMethod.getModifiers())
                    && !seen.contains(testClass)) {
                seen.add(testClass);
                try {
                    return (Test) suiteMethod.invoke(null, (Object[]) null);
                } catch (InvocationTargetException e) {
                    // do nothing
                } catch (IllegalAccessException e) {
                    // do nothing
                }
            }
        } catch (NoSuchMethodException e) {
            // do nothing
        }
        return null;
    }

    public static String getTestName(Test test) {
        if (test instanceof TestCase) {
            TestCase testCase = (TestCase) test;
            return testCase.getName();
        } else if (test instanceof TestSuite) {
            TestSuite testSuite = (TestSuite) test;
            String name = testSuite.getName();
            if (name != null) {
                int index = name.lastIndexOf(".");
                if (index > -1) {
                    return name.substring(index + 1);
                } else {
                    return name;
                }
            }
        }
        return "";
    }

    public static Test getTestAtIndex(TestSuite testSuite, int position) {
        int index = 0;
        Enumeration enumeration = testSuite.tests();
        while (enumeration.hasMoreElements()) {
            Test test = (Test) enumeration.nextElement();
            if (index == position) {
                return test;
            }
            index++;
        }
        return null;
    }

    public static TestSuite createTestSuite(Class<? extends Test> testClass)
            throws InstantiationException, IllegalAccessException {

        Test test = invokeSuiteMethodIfPossible(testClass, 
                new HashSet<Class());
        if (test == null) {
            return new TestSuite(testClass);

        } else if (TestCase.class.isAssignableFrom(test.getClass())) {
            TestSuite testSuite = new TestSuite(test.getClass().getName());
            testSuite.addTest(test);
            return testSuite;
        }

        return (TestSuite) test;
    }
}

Other Android examples (source code examples)

Here is a short list of links related to this Android TestCaseUtil.java source code file:

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