Android example source code file (LogTest.java)

This example Android source code file (LogTest.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

after, before, exception, logtest, mocklog, my, override, stringbuilder, test

The LogTest.java Android example source code

/*
 * Copyright (C) 2008 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 com.android.tools.layoutlib.create;

import static org.junit.Assert.*;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class LogTest {

    public static class MockLog extends Log {
        StringBuilder mOut = new StringBuilder();
        StringBuilder mErr = new StringBuilder();
        
        public String getOut() {
            return mOut.toString();
        }
        
        public String getErr() {
            return mErr.toString();
        }
        
        @Override
        protected void outPrintln(String msg) {
            mOut.append(msg);
            mOut.append('\n');
        }
        
        @Override
        protected void errPrintln(String msg) {
            mErr.append(msg);
            mErr.append('\n');
        }
    }

    private MockLog mLog;
    
    @Before
    public void setUp() throws Exception {
        mLog = new MockLog();
    }

    @After
    public void tearDown() throws Exception {
        // pass
    }

    @Test
    public void testDebug() {
        assertEquals("", mLog.getOut());
        assertEquals("", mLog.getErr());

        mLog.setVerbose(false);
        mLog.debug("Test %d", 42);
        assertEquals("", mLog.getOut());

        mLog.setVerbose(true);
        mLog.debug("Test %d", 42);

        assertEquals("Test 42\n", mLog.getOut());
        assertEquals("", mLog.getErr());
    }

    @Test
    public void testInfo() {
        assertEquals("", mLog.getOut());
        assertEquals("", mLog.getErr());

        mLog.info("Test %d", 43);

        assertEquals("Test 43\n", mLog.getOut());
        assertEquals("", mLog.getErr());
    }

    @Test
    public void testError() {
        assertEquals("", mLog.getOut());
        assertEquals("", mLog.getErr());

        mLog.error("Test %d", 44);

        assertEquals("", mLog.getOut());
        assertEquals("Test 44\n", mLog.getErr());
    }

    @Test
    public void testException() {
        assertEquals("", mLog.getOut());
        assertEquals("", mLog.getErr());

        Exception e = new Exception("My Exception");
        mLog.exception(e, "Test %d", 44);

        assertEquals("", mLog.getOut());
        assertTrue(mLog.getErr().startsWith("Test 44\njava.lang.Exception: My Exception"));
    }
}