IOUtilsTest.java

/**
 * Copyright 2016 Yahoo Inc.
 *
 * 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.yahoo.pulsar.admin.cli.utils;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;

import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

public class IOUtilsTest {

    InputStream stdin = System.in;
    PrintStream stdout = System.out;

    @AfterClass
    public void tearDown() {
        System.setIn(stdin);
        System.setOut(stdout);
    }

    @BeforeClass
    public void setUp() {
    }

    @Test
    public void test1() {
        String data = "y";
        try {
            System.setIn(new ByteArrayInputStream(data.getBytes()));
            IOUtils obj = new IOUtils();
            Assert.assertTrue(obj.confirmPrompt("Is you name John Doe?"));
        } catch (IOException e) {
            Assert.fail();
        }
    }

    @Test
    public void test2() {
        String data = "yes";
        try {
            System.setIn(new ByteArrayInputStream(data.getBytes()));
            IOUtils obj = new IOUtils();
            Assert.assertTrue(obj.confirmPrompt("Are we there yet?"));
        } catch (IOException e) {
            Assert.fail();
        }
    }

    @Test
    public void test3() {
        String data = "n";
        try {
            System.setIn(new ByteArrayInputStream(data.getBytes()));
            IOUtils obj = new IOUtils();
            Assert.assertFalse(obj.confirmPrompt("Can I go home?"));
        } catch (IOException e) {
            Assert.fail();
        }
    }

    @Test
    public void test4() {
        String data = "no";
        try {
            System.setIn(new ByteArrayInputStream(data.getBytes()));
            IOUtils obj = new IOUtils();
            Assert.assertFalse(obj.confirmPrompt("Is it Sunday?"));
        } catch (IOException e) {
            Assert.fail();
        }
    }

    @Test(description = "Should go into infinte loop since j is an invalid response.")
    public void test5() {
        try {
            String data = "j";
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            System.setOut(new PrintStream(baos));
            System.setIn(new ByteArrayInputStream(data.getBytes()));
            IOUtils obj = new IOUtils();
            ExecutorService executor = Executors.newSingleThreadExecutor();
            Future<Void> future = (Future<Void>) executor.submit(() -> {
                try {
                    obj.confirmPrompt("When will this week end?");
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            });
            future.get(1, TimeUnit.SECONDS);
            Assert.fail();
        } catch (Exception ex) {
            // expected
        }
    }

    @Test(description = "Should go into infinte loop since \r means next line.")
    public void test6() {
        try {
            String data = "\n";
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            System.setOut(new PrintStream(baos));
            System.setIn(new ByteArrayInputStream(data.getBytes("UTF-8")));
            IOUtils obj = new IOUtils();
            ExecutorService executor = Executors.newSingleThreadExecutor();
            Future<Void> future = (Future<Void>) executor.submit(() -> {
                try {
                    obj.confirmPrompt("Is you name Pulsar?");
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            });
            future.get(1, TimeUnit.SECONDS);
            Assert.fail();
        } catch (Exception ex) {
            // expected
        }
    }
}