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Groovy example source code file (ExecuteTest.groovy)

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

Java - Groovy tags/keywords

err, err, executing, exit, exit, file, groovytestcase, insufficient, list, out, out, string, stringbuffer, stringbuffer

The Groovy ExecuteTest.groovy source code

/*
 * Copyright 2003-2010 the original author or authors.
 *
 * 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 groovy.execute

/**
 *  Cross platform tests for the DGM#execute() family of methods.
 *
 *  @author Paul King
 */
class ExecuteTest extends GroovyTestCase {
    private String getCmd() {
        def cmd = "ls -l"
        if (System.properties.'os.name'.startsWith('Windows ')) {
            cmd = "cmd /c dir"
        }
        return cmd
    }

    void testExecuteCommandLineProcessUsingAString() {
        println "Executing String command: $cmd"
        StringBuffer sbout = new StringBuffer()
        StringBuffer sberr = new StringBuffer()
        def process = cmd.execute()
        process.waitForProcessOutput sbout, sberr
        def value = process.exitValue()
        int count = sbout.toString().readLines().size()
        println "Exit value: $value, Err lines: ${sberr.toString().readLines().size()}, Out lines: $count"
        assert count > 1
        assert value == 0
    }

    void testExecuteCommandLineProcessUsingAStringArray() {
        def cmdArray = cmd.split(' ')
        println "Executing String[] command: $cmdArray"
        StringBuffer sbout = new StringBuffer()
        StringBuffer sberr = new StringBuffer()
        def process = cmdArray.execute()
        process.waitForProcessOutput sbout, sberr
        def value = process.exitValue()
        int count = sbout.toString().readLines().size()
        println "Exit value: $value, Err lines: ${sberr.toString().readLines().size()}, Out lines: $count"
        assert count > 1
        assert value == 0
    }

    void testExecuteCommandLineProcessUsingAList() {
        List<String> cmdList = Arrays.asList(cmd.split(' '))
        println "Executing List<String> command: $cmdList"
        StringBuffer sbout = new StringBuffer()
        StringBuffer sberr = new StringBuffer()
        def process = cmdList.execute()
        process.waitForProcessOutput sbout, sberr
        def value = process.exitValue()
        int count = sbout.toString().readLines().size()
        println "Exit value: $value, Err lines: ${sberr.toString().readLines().size()}, Out lines: $count"
        assert count > 1
        assert value == 0
    }

    void testExecuteCommandLineProcessAndUseWaitForOrKill() {
        def cp = System.getProperty('java.class.path')
        def java = System.getProperty('java.home') + """/bin/java -cp $cp groovy.ui.GroovyMain -e "sleep(2000); println('Done')" """
        println "Executing this command for two cases:\n$java"
        StringBuffer sbout = new StringBuffer()
        StringBuffer sberr = new StringBuffer()
        def process = java.execute()
        def tout = process.consumeProcessOutputStream(sbout)
        def terr = process.consumeProcessErrorStream(sberr)
        process.waitForOrKill(60000)
        tout.join()
        terr.join()
        def value = process.exitValue()
        int count = sbout.toString().readLines().size()
        println "Heaps of time case: Exit value: $value, Err lines: ${sberr.toString().readLines().size()}, Out lines: $count"
        System.err.println 'std err: ' + sberr.toString()
        System.err.println 'std out: ' + sbout.toString()
//        assert sbout.toString().contains('Done'), "Expected 'Done' but found: " + sbout.toString() + " with error: " + sberr.toString()
        assert value == 0

        sbout = new StringBuffer()
        sberr = new StringBuffer()
        process = java.execute()
        process.pipeTo(process)
        tout = process.consumeProcessOutputStream(sbout)
        terr = process.consumeProcessErrorStream(sberr)
        process.waitForOrKill(500)
        tout.join()
        terr.join()
        value = process.exitValue()
        count = sbout.toString().readLines().size()
        println "Insufficient time case: Exit value: $value, Err lines: ${sberr.toString().readLines().size()}, Out lines: $count"
        assert !sbout.toString().contains('Done')
        assert value != 0 // should have been killed
    }

    void testExecuteCommandLineUnderWorkingDirectory() {
        println "Executing command in dir '..': $cmd"
        StringBuffer sbout = new StringBuffer()
        StringBuffer sberr = new StringBuffer()
        def process = cmd.execute(null, new File('..'))
        process.waitForProcessOutput sbout, sberr
        def value = process.exitValue()
        int count = sbout.toString().readLines().size()
        println "Exit value: $value, Err lines: ${sberr.toString().readLines().size()}, Out lines: $count"
        assert count > 1
        assert value == 0
    }

    void testExecuteCommandLineWithEnvironmentProperties() {
        def cp = System.getProperty('java.class.path')
        def java = System.getProperty('java.home') + """/bin/java -classpath $cp groovy.ui.GroovyMain -e "println(System.getenv('foo'))" """
        println "Executing this command:\n$java"
        def props = ["foo=bar"]
        println "With these props: $props"
        StringBuffer sbout = new StringBuffer()
        StringBuffer sberr = new StringBuffer()
        def process = java.execute(props, null)
        process.waitForProcessOutput sbout, sberr
        def value = process.exitValue()
        int count = sbout.toString().readLines().size()
        println "Exit value: $value, Err lines: ${sberr.toString().readLines().size()}, Out lines: $count"
        assert sbout.toString().contains('bar')
        assert value == 0
    }

}

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