Android example source code file (AndroidTestCase.java)

This example Android source code file (AndroidTestCase.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, androidtestcase, class, content, contentvalues, context, could, error, exception, field, illegalaccessexception, intent, internet, net, network, override, reflection, securityexception, string, testcase

The AndroidTestCase.java Android example source code

/*
 * Copyright (C) 2006 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 android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import junit.framework.TestCase;

import java.lang.reflect.Field;

/**
 * Extend this if you need to access Resources or other things that depend on Activity Context.
 */
public class AndroidTestCase extends TestCase {

    protected Context mContext;
    private Context mTestContext;

    @Override
    protected void setUp() throws Exception {
        super.setUp();
    }

    @Override
    protected void tearDown() throws Exception {
        super.tearDown();
    }

    public void testAndroidTestCaseSetupProperly() {
        assertNotNull("Context is null. setContext should be called before tests are run",
                mContext);
    }

    public void setContext(Context context) {
        mContext = context;
    }

    public Context getContext() {
        return mContext;
    }

    /**
     * Test context can be used to access resources from the test's own package
     * as opposed to the resources from the test target package. Access to the
     * latter is provided by the context set with the {@link #setContext}
     * method.
     *
     * @hide
     */
    public void setTestContext(Context context) {
        mTestContext = context;
    }

    /**
     * @hide
     */
    public Context getTestContext() {
        return mTestContext;
    }

    /**
     * Asserts that launching a given activity is protected by a particular permission by
     * attempting to start the activity and validating that a {@link SecurityException}
     * is thrown that mentions the permission in its error message.
     *
     * Note that an instrumentation isn't needed because all we are looking for is a security error
     * and we don't need to wait for the activity to launch and get a handle to the activity.
     *
     * @param packageName The package name of the activity to launch.
     * @param className The class of the activity to launch.
     * @param permission The name of the permission.
     */
    public void assertActivityRequiresPermission(
            String packageName, String className, String permission) {
        final Intent intent = new Intent();
        intent.setClassName(packageName, className);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        try {
            getContext().startActivity(intent);
            fail("expected security exception for " + permission);
        } catch (SecurityException expected) {
            assertNotNull("security exception's error message.", expected.getMessage());
            assertTrue("error message should contain " + permission + ".",
                    expected.getMessage().contains(permission));
        }
    }


    /**
     * Asserts that reading from the content uri requires a particular permission by querying the
     * uri and ensuring a {@link SecurityException} is thrown mentioning the particular permission.
     *
     * @param uri The uri that requires a permission to query.
     * @param permission The permission that should be required.
     */
    public void assertReadingContentUriRequiresPermission(Uri uri, String permission) {
        try {
            getContext().getContentResolver().query(uri, null, null, null, null);
            fail("expected SecurityException requiring " + permission);
        } catch (SecurityException expected) {
            assertNotNull("security exception's error message.", expected.getMessage());
            assertTrue("error message should contain " + permission + ".",
                    expected.getMessage().contains(permission));
        }
    }

    /**
     * Asserts that writing to the content uri requires a particular permission by inserting into
     * the uri and ensuring a {@link SecurityException} is thrown mentioning the particular
     * permission.
     *
     * @param uri The uri that requires a permission to query.
     * @param permission The permission that should be required.
     */
    public void assertWritingContentUriRequiresPermission(Uri uri, String permission) {
        try {
            getContext().getContentResolver().insert(uri, new ContentValues());
            fail("expected SecurityException requiring " + permission);
        } catch (SecurityException expected) {
            assertNotNull("security exception's error message.", expected.getMessage());
            assertTrue("error message should contain " + permission + ".",
                    expected.getMessage().contains(permission));
        }
    }

    /**
     * This function is called by various TestCase implementations, at tearDown() time, in order
     * to scrub out any class variables.  This protects against memory leaks in the case where a
     * test case creates a non-static inner class (thus referencing the test case) and gives it to
     * someone else to hold onto.
     *
     * @param testCaseClass The class of the derived TestCase implementation.
     *
     * @throws IllegalAccessException
     */
    protected void scrubClass(final Class<?> testCaseClass)
    throws IllegalAccessException {
        final Field[] fields = getClass().getDeclaredFields();
        for (Field field : fields) {
            final Class<?> fieldClass = field.getDeclaringClass();
            if (testCaseClass.isAssignableFrom(fieldClass) && !field.getType().isPrimitive()) {
                try {
                    field.setAccessible(true);
                    field.set(this, null);
                } catch (Exception e) {
                    android.util.Log.d("TestCase", "Error: Could not nullify field!");
                }

                if (field.get(this) != null) {
                    android.util.Log.d("TestCase", "Error: Could not nullify field!");
                }
            }
        }
    }


}