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## org.apache.tools.ant.taskdefs.optional.junit
Class JUnitTask

    java.lang.Object
      |
      +--org.apache.tools.ant.ProjectComponent
            |
            +--org.apache.tools.ant.Task
                  |
                  +--org.apache.tools.ant.taskdefs.optional.junit.JUnitTask

public class JUnitTask
extends Task

Runs JUnit tests.

JUnit is a framework to create unit test. It has been initially created by Erich Gamma and Kent Beck. JUnit can be found at http://www.junit.org.

`JUnitTask` can run a single specific `JUnitTest` using the `test` element.

For example, the following target `

       <target name="test-int-chars" depends="jar-test">
           <echo message="testing international characters"/>
           <junit printsummary="no" haltonfailure="yes" fork="false">
               <classpath refid="classpath"/>
               <formatter type="plain" usefile="false" />
               <test name="org.apache.ecs.InternationalCharTest" />
           </junit>
       </target>

`

runs a single junit test (`org.apache.ecs.InternationalCharTest`) in the current VM using the path with id `classpath` as classpath and presents the results formatted using the standard `plain` formatter on the command line.

This task can also run batches of tests. The `batchtest` element creates a `BatchTest` based on a fileset. This allows, for example, all classes found in directory to be run as testcases.

For example,

`

     <target name="run-tests" depends="dump-info,compile-tests" if="junit.present">
       <junit printsummary="no" haltonfailure="yes" fork="${junit.fork}">
         <jvmarg value="-classic"/>
         <classpath refid="tests-classpath"/>
         <sysproperty key="build.tests" value="${build.tests}"/>
         <formatter type="brief" usefile="false" />
         <batchtest>
           <fileset dir="${tests.dir}">
             <include name="**/*Test*" />
           </fileset>
         </batchtest>
       </junit>
     </target>

`

this target finds any classes with a `test` directory anywhere in their path (under the top `${tests.dir}`, of course) and creates `JUnitTest`'s for each one.

Of course, `<junit>` and `<batch>` elements can be combined for more complex tests. For an example, see the ant `build.xml` target `run-tests` (the second example is an edited version).

To spawn a new Java VM to prevent interferences between different testcases, you need to enable `fork`. A number of attributes and elements allow you to set up how this JVM runs.

Since:
  Ant 1.2
See Also:
  `JUnitTest`, `BatchTest`

Nested Class Summary
`static class` | `JUnitTask.ForkMode` These are the different forking options
`static class` | `JUnitTask.SummaryAttribute` Print summary enumeration values.

Field Summary

Fields inherited from class org.apache.tools.ant.Task
`description, location, target, taskName, taskType, wrapper`

Fields inherited from class org.apache.tools.ant.ProjectComponent
`project`

Constructor Summary
`JUnitTask()` Creates a new JUnitRunner and enables fork of a new Java VM.

Method Summary
`protected void` | `actOnTestResult(int exitValue, boolean wasKilled, JUnitTest test, java.lang.String name)` Logs information about failed tests, potentially stops processing (by throwing a BuildException) if a failure/error occured or sets a property.
`void` | `addAssertions(Assertions asserts)` Assertions to enable in this program (if fork=true)
`protected void` | `addClasspathEntry(java.lang.String resource)` Search for the given resource and add the directory or archive that contains it to the classpath.
`void` | `addConfiguredSysproperty(Environment.Variable sysp)` Adds a system property that tests can access.
`void` | `addEnv(Environment.Variable var)` Adds an environment variable; used when forking.
`void` | `addFormatter(FormatterElement fe)` Add a new formatter to all tests of this task.
`void` | `addSysproperty(Environment.Variable sysp)` Deprecated. since ant 1.6
`void` | `addSyspropertyset(PropertySet sysp)` Adds a set of properties that will be used as system properties that tests can access.
`void` | `addTest(JUnitTest test)` Add a new single testcase.
`protected java.util.Enumeration` | `allTests()` return an enumeration listing each test, then each batchtest
`BatchTest` | `createBatchTest()` Adds a set of tests based on pattern matching.
`Path` | `createBootclasspath()` Adds a path to the bootclasspath.
`Path` | `createClasspath()` Adds path to classpath used for tests.
`Commandline.Argument` | `createJvmarg()` Adds a JVM argument; ignored if not forking.
`Permissions` | `createPermissions()` Sets the permissions for the application run inside the same JVM.
`protected ExecuteWatchdog` | `createWatchdog()`
`void` | `execute()` Runs the testcase.
`protected void` | `execute(JUnitTest arg)` Run the tests.
`protected void` | `execute(java.util.List tests)` Execute a list of tests in a single forked Java VM.
`protected java.util.Collection` | `executeOrQueue(java.util.Enumeration testList, boolean runIndividual)` Executes all tests that don't need to be forked (or all tests if the runIndividual argument is true.
`protected CommandlineJava` | `getCommandline()`
`protected java.io.OutputStream` | `getDefaultOutput()` Get the default output for a formatter.
`protected java.util.Enumeration` | `getIndividualTests()` Merge all individual tests from the batchtest with all individual tests and return an enumeration over all `JUnitTest`.
`protected java.io.File` | `getOutput(FormatterElement fe, JUnitTest test)` If the formatter sends output to a file, return that file.
`void` | `handleErrorFlush(java.lang.String output)` Pass output sent to System.err to the TestRunner so it can collect it for the formatters.
`void` | `handleErrorOutput(java.lang.String output)` Pass output sent to System.err to the TestRunner so it can collect it for the formatters.
`protected void` | `handleFlush(java.lang.String output)` Pass output sent to System.out to the TestRunner so it can collect ot for the formatters.
`protected int` | `handleInput(byte[] buffer, int offset, int length)` Handle an input request by this task
`protected void` | `handleOutput(java.lang.String output)` Pass output sent to System.out to the TestRunner so it can collect ot for the formatters.
`void` | `init()` Adds the jars or directories containing Ant, this task and JUnit to the classpath - this should make the forked JVM work without having to specify them directly.
`void` | `setDir(java.io.File dir)` The directory to invoke the VM in.
`void` | `setErrorProperty(java.lang.String propertyName)` Property to set to "true" if there is a error in a test.
`void` | `setFailureProperty(java.lang.String propertyName)` Property to set to "true" if there is a failure in a test.
`void` | `setFiltertrace(boolean value)` If true, smartly filter the stack frames of JUnit errors and failures before reporting them.
`void` | `setFork(boolean value)` If true, JVM should be forked for each test.
`void` | `setForkMode(JUnitTask.ForkMode mode)` Set the behavior when `fork` fork has been enabled.
`void` | `setHaltonerror(boolean value)` If true, stop the build process when there is an error in a test.
`void` | `setHaltonfailure(boolean value)` If true, stop the build process if a test fails (errors are considered failures as well).
`void` | `setIncludeantruntime(boolean b)` If true, include ant.jar, optional.jar and junit.jar in the forked VM.
`void` | `setJvm(java.lang.String value)` The command used to invoke the Java Virtual Machine, default is 'java'.
`void` | `setMaxmemory(java.lang.String max)` Set the maximum memory to be used by all forked JVMs.
`void` | `setNewenvironment(boolean newenv)` If true, use a new environment when forked.
`void` | `setPrintsummary(JUnitTask.SummaryAttribute value)` If true, print one-line statistics for each test, or "withOutAndErr" to also show standard output and error.
`void` | `setReloading(boolean value)` If true, force ant to re-classload all classes for each JUnit TestCase
`void` | `setShowOutput(boolean showOutput)` If true, send any output generated by tests to Ant's logging system as well as to the formatters.
`void` | `setTempdir(java.io.File tmpDir)` Where Ant should place temporary files.
`void` | `setTimeout(java.lang.Integer value)` Set the timeout value (in milliseconds).

Methods inherited from class org.apache.tools.ant.Task
`getDescription, getLocation, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, isInvalid, log, log, maybeConfigure, perform, reconfigure, setDescription, setLocation, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName, setTaskType`

Methods inherited from class org.apache.tools.ant.ProjectComponent
`getProject, setProject`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### JUnitTask

    public JUnitTask()
              throws java.lang.Exception

  Creates a new JUnitRunner and enables fork of a new Java VM.

Throws:
  `java.lang.Exception` - under ??? circumstances
Since:
  Ant 1.2

Method Detail

### setReloading

    public void setReloading(boolean value)

  If true, force ant to re-classload all classes for each JUnit TestCase

  Parameters:
    `value` - force class reloading for each test case

### setFiltertrace

    public void setFiltertrace(boolean value)

  If true, smartly filter the stack frames of JUnit errors and failures before reporting them.

  This property is applied on all BatchTest (batchtest) and JUnitTest (test) however it can possibly be overridden by their own properties.

  Parameters:
    `value` - `false` if it should not filter, otherwise `true```
  Since:
    Ant 1.5

### setHaltonerror

    public void setHaltonerror(boolean value)

  If true, stop the build process when there is an error in a test. This property is applied on all BatchTest (batchtest) and JUnitTest (test) however it can possibly be overridden by their own properties.

  Parameters:
    `value` - `true` if it should halt, otherwise `false`
  Since:
    Ant 1.2

### setErrorProperty

    public void setErrorProperty(java.lang.String propertyName)

  Property to set to "true" if there is a error in a test.

  This property is applied on all BatchTest (batchtest) and JUnitTest (test), however, it can possibly be overriden by their own properties.

  Parameters:
    `propertyName` - the name of the property to set in the event of an error.
  Since:
    Ant 1.4

### setHaltonfailure

    public void setHaltonfailure(boolean value)

  If true, stop the build process if a test fails (errors are considered failures as well). This property is applied on all BatchTest (batchtest) and JUnitTest (test) however it can possibly be overridden by their own properties.

  Parameters:
    `value` - `true` if it should halt, otherwise `false`
  Since:
    Ant 1.2

### setFailureProperty

    public void setFailureProperty(java.lang.String propertyName)

  Property to set to "true" if there is a failure in a test.

  This property is applied on all BatchTest (batchtest) and JUnitTest (test), however, it can possibly be overriden by their own properties.

  Parameters:
    `propertyName` - the name of the property to set in the event of an failure.
  Since:
    Ant 1.4

### setFork

    public void setFork(boolean value)

  If true, JVM should be forked for each test.

  It avoids interference between testcases and possibly avoids hanging the build. this property is applied on all BatchTest (batchtest) and JUnitTest (test) however it can possibly be overridden by their own properties.

  Parameters:
    `value` - `true` if a JVM should be forked, otherwise `false`
  Since:
    Ant 1.2
  See Also:
    `setTimeout(java.lang.Integer)`

### setForkMode

    public void setForkMode(JUnitTask.ForkMode mode)

  Set the behavior when `fork` fork has been enabled.

  Possible values are "once", "perTest" and "perBatch". If set to "once", only a single Java VM will be forked for all tests, with "perTest" (the default) each test will run in a fresh Java VM and "perBatch" will run all tests from the same <batchtest> in the same Java VM.

  This attribute will be ignored if tests run in the same VM as Ant.

  Only tests with the same configuration of haltonerror, haltonfailure, errorproperty, failureproperty and filtertrace can share a forked Java VM, so even if you set the value to "once", Ant may need to fork mutliple VMs.

  Since:
    Ant 1.6.2

### setPrintsummary

    public void setPrintsummary(JUnitTask.SummaryAttribute value)

  If true, print one-line statistics for each test, or "withOutAndErr" to also show standard output and error. Can take the values on, off, and withOutAndErr.

  Parameters:
    `value` - `true` to print a summary, `withOutAndErr` to include the test's output as well, `false` otherwise.
  Since:
    Ant 1.2
  See Also:
    `SummaryJUnitResultFormatter`

### setTimeout

    public void setTimeout(java.lang.Integer value)

  Set the timeout value (in milliseconds).

  If the test is running for more than this value, the test will be canceled. (works only when in 'fork' mode).

  Parameters:
    `value` - the maximum time (in milliseconds) allowed before declaring the test as 'timed-out'
  Since:
    Ant 1.2
  See Also:
    `setFork(boolean)`

### setMaxmemory

    public void setMaxmemory(java.lang.String max)

  Set the maximum memory to be used by all forked JVMs.

  Parameters:
    `max` - the value as defined by `-mx` or `-Xmx` in the java command line options.
  Since:
    Ant 1.2

### setJvm

    public void setJvm(java.lang.String value)

  The command used to invoke the Java Virtual Machine, default is 'java'. The command is resolved by java.lang.Runtime.exec(). Ignored if fork is disabled.

  Parameters:
    `value` - the new VM to use instead of `java`
  Since:
    Ant 1.2
  See Also:
    `setFork(boolean)`

### createJvmarg

    public Commandline.Argument createJvmarg()

  Adds a JVM argument; ignored if not forking.

  Returns:
    create a new JVM argument so that any argument can be passed to the JVM.
  Since:
    Ant 1.2
  See Also:
    `setFork(boolean)`

### setDir

    public void setDir(java.io.File dir)

  The directory to invoke the VM in. Ignored if no JVM is forked.

  Parameters:
    `dir` - the directory to invoke the JVM from.
  Since:
    Ant 1.2
  See Also:
    `setFork(boolean)`

### addSysproperty

    public void addSysproperty(Environment.Variable sysp)

  Deprecated. since ant 1.6

  Adds a system property that tests can access. This might be useful to tranfer Ant properties to the testcases when JVM forking is not enabled.

  Parameters:
    `sysp` - environment variable to add
  Since:
    Ant 1.3

### addConfiguredSysproperty

    public void addConfiguredSysproperty(Environment.Variable sysp)

  Adds a system property that tests can access. This might be useful to tranfer Ant properties to the testcases when JVM forking is not enabled.

  Parameters:
    `sysp` - new environment variable to add
  Since:
    Ant 1.6

### addSyspropertyset

    public void addSyspropertyset(PropertySet sysp)

  Adds a set of properties that will be used as system properties that tests can access. This might be useful to tranfer Ant properties to the testcases when JVM forking is not enabled.

  Parameters:
    `sysp` - set of properties to be added
  Since:
    Ant 1.6

### createClasspath

    public Path createClasspath()

  Adds path to classpath used for tests.

  Returns:
    reference to the classpath in the embedded java command line
  Since:
    Ant 1.2

### createBootclasspath

    public Path createBootclasspath()

  Adds a path to the bootclasspath.

  Returns:
    reference to the bootclasspath in the embedded java command line
  Since:
    Ant 1.6

### addEnv

    public void addEnv(Environment.Variable var)

  Adds an environment variable; used when forking.

  Will be ignored if we are not forking a new VM.

  Parameters:
    `var` - environment variable to be added
  Since:
    Ant 1.5

### setNewenvironment

    public void setNewenvironment(boolean newenv)

  If true, use a new environment when forked.

  Will be ignored if we are not forking a new VM.

  Parameters:
    `newenv` - boolean indicating if setting a new environment is wished
  Since:
    Ant 1.5

### addTest

    public void addTest(JUnitTest test)

  Add a new single testcase.

  Parameters:
    `test` - a new single testcase
  Since:
    Ant 1.2
  See Also:
    `JUnitTest`

### createBatchTest

    public BatchTest createBatchTest()

  Adds a set of tests based on pattern matching.

  Returns:
    a new instance of a batch test.
  Since:
    Ant 1.2
  See Also:
    `BatchTest`

### addFormatter

    public void addFormatter(FormatterElement fe)

  Add a new formatter to all tests of this task.

  Parameters:
    `fe` - formatter element
  Since:
    Ant 1.2

### setIncludeantruntime

    public void setIncludeantruntime(boolean b)

  If true, include ant.jar, optional.jar and junit.jar in the forked VM.

  Parameters:
    `b` - include ant run time yes or no
  Since:
    Ant 1.5

### setShowOutput

    public void setShowOutput(boolean showOutput)

  If true, send any output generated by tests to Ant's logging system as well as to the formatters. By default only the formatters receive the output.

  Output will always be passed to the formatters and not by shown by default. This option should for example be set for tests that are interactive and prompt the user to do something.

  Parameters:
    `showOutput` - if true, send output to Ant's logging system too
  Since:
    Ant 1.5

### addAssertions

    public void addAssertions(Assertions asserts)

  Assertions to enable in this program (if fork=true)

  Parameters:
    `asserts` - assertion set
  Since:
    Ant 1.6

### createPermissions

    public Permissions createPermissions()

  Sets the permissions for the application run inside the same JVM.

  Returns:
    .
  Since:
    Ant 1.6

### setTempdir

    public void setTempdir(java.io.File tmpDir)

  Where Ant should place temporary files.

  Parameters:
    `tmpDir` - location where temporary files should go to
  Since:
    Ant 1.6

### init

    public void init()

  Adds the jars or directories containing Ant, this task and JUnit to the classpath - this should make the forked JVM work without having to specify them directly.

  Overrides:
    `init` in class `Task`
  Since:
    Ant 1.4

### execute

    public void execute()
                 throws BuildException

  Runs the testcase.

  Overrides:
    `execute` in class `Task`
  Throws:
    `BuildException` - in case of test failures or errors
  Since:
    Ant 1.2

### execute

    protected void execute(JUnitTest arg)
                    throws BuildException

  Run the tests.

  Parameters:
    `arg` - one JunitTest
  Throws:
    `BuildException` - in case of test failures or errors

### execute

    protected void execute(java.util.List tests)
                    throws BuildException

  Execute a list of tests in a single forked Java VM.

    `BuildException`

### handleOutput

    protected void handleOutput(java.lang.String output)

  Pass output sent to System.out to the TestRunner so it can collect ot for the formatters.

  Overrides:
    `handleOutput` in class `Task`
  Parameters:
    `output` - output coming from System.out
  Since:
    Ant 1.5

### handleInput

    protected int handleInput(byte[] buffer,
                              int offset,
                              int length)
                       throws java.io.IOException

  Description copied from class: `Task`
  Handle an input request by this task

  Overrides:
    `handleInput` in class `Task`
  Parameters:
    `buffer` - the buffer into which data is to be read.
    `offset` - the offset into the buffer at which data is stored.
    `length` - the amount of data to read
  Returns:
    the number of bytes read
  Throws:
    `java.io.IOException` - if the data cannot be read
  Since:
    Ant 1.6
  See Also:
    `Task.handleInput(byte[], int, int)`

### handleFlush

    protected void handleFlush(java.lang.String output)

  Pass output sent to System.out to the TestRunner so it can collect ot for the formatters.

  Overrides:
    `handleFlush` in class `Task`
  Parameters:
    `output` - output coming from System.out
  Since:
    Ant 1.5.2

### handleErrorOutput

    public void handleErrorOutput(java.lang.String output)

  Pass output sent to System.err to the TestRunner so it can collect it for the formatters.

  Overrides:
    `handleErrorOutput` in class `Task`
  Parameters:
    `output` - output coming from System.err
  Since:
    Ant 1.5

### handleErrorFlush

    public void handleErrorFlush(java.lang.String output)

  Pass output sent to System.err to the TestRunner so it can collect it for the formatters.

  Overrides:
    `handleErrorFlush` in class `Task`
  Parameters:
    `output` - coming from System.err
  Since:
    Ant 1.5.2

### createWatchdog

    protected ExecuteWatchdog createWatchdog()
                                      throws BuildException

  Returns:
    `null` if there is a timeout value, otherwise the watchdog instance.
  Throws:
    `BuildException` - under unspecified circumstances
  Since:
    Ant 1.2

### getDefaultOutput

    protected java.io.OutputStream getDefaultOutput()

  Get the default output for a formatter.

  Returns:
    default output stream for a formatter
  Since:
    Ant 1.3

### getIndividualTests

    protected java.util.Enumeration getIndividualTests()

  Merge all individual tests from the batchtest with all individual tests and return an enumeration over all `JUnitTest`.

  Returns:
    enumeration over individual tests
  Since:
    Ant 1.3

### allTests

    protected java.util.Enumeration allTests()

  return an enumeration listing each test, then each batchtest

  Returns:
    enumeration
  Since:
    Ant 1.3

### getOutput

    protected java.io.File getOutput(FormatterElement fe,
                                     JUnitTest test)

  If the formatter sends output to a file, return that file. null otherwise.

  Parameters:
    `fe` - formatter element
    `test` - one JUnit test
  Returns:
    file reference
  Since:
    Ant 1.3

### addClasspathEntry

    protected void addClasspathEntry(java.lang.String resource)

  Search for the given resource and add the directory or archive that contains it to the classpath.

  Doesn't work for archives in JDK 1.1 as the URL returned by getResource doesn't contain the name of the archive.

  Parameters:
    `resource` - resource that one wants to lookup
  Since:
    Ant 1.4

### getCommandline

    protected CommandlineJava getCommandline()

  Since:
    Ant 1.6.2

### executeOrQueue

    protected java.util.Collection executeOrQueue(java.util.Enumeration testList,
                                                  boolean runIndividual)

  Executes all tests that don't need to be forked (or all tests if the runIndividual argument is true. Returns a collection of lists of tests that share the same VM configuration and haven't been executed yet.

  Since:
    1.6.2

### actOnTestResult

    protected void actOnTestResult(int exitValue,
                                   boolean wasKilled,
                                   JUnitTest test,
                                   java.lang.String name)

  Logs information about failed tests, potentially stops processing (by throwing a BuildException) if a failure/error occured or sets a property.

  Since:
    Ant 1.6.2

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