// UnitTest has a guard to prevent from calling this method more then once.
  virtual void RegisterTests() {
    for (typename TestInfoContainer::iterator test_it = tests_.begin();
         test_it != tests_.end(); ++test_it) {
      linked_ptr<TestInfo> test_info = *test_it;
      for (typename InstantiationContainer::iterator gen_it =
               instantiations_.begin(); gen_it != instantiations_.end();
               ++gen_it) {

ftp> ls runner/
229 Entering Extended Passive Mode (|||39155|)
150 Opening ASCII mode data connection for file list
drwxrwxrwx 1 nobody nobody            0 Jan  1 00:00 chunkdocs/
drwxrwxrwx 1 nobody nobody            0 Jan  1 00:00 testdir/
...
```

Following example shows how to list an object and download it locally via `ftp` client:

```
ftp> ls runner/chunkdocs/metadata
229 Entering Extended Passive Mode (|||44269|)

    <property name="build.dir" value="target"/>
    <property name="classes.dir" value="${build.dir}/classes"/>

    <target name="compile">
        <mkdir dir="${classes.dir}"/>
        <javac srcdir="${src.dir}" destdir="${classes.dir}" debug="true"/>
    </target>

    <target name="package" depends="build">
        <jar destfile="${build.dir}/lib/hello-app.jar" basedir="${classes.dir}"/>
    </target>

        'RegularFileProperty' | []                    | 'null'      | 'fileProperty'      | 'not provided'
        'DirectoryProperty'   | ['--myProp=testDir']  | 'testDir'   | 'directoryProperty' | 'provided'
        'DirectoryProperty'   | []                    | 'null'      | 'directoryProperty' | 'not provided'
    }

            <format property="now" pattern="yyyy-MM-dd hh:mm:ss"/>
        </tstamp>
    </target>

    <target name="build" depends="prepare">
        <mkdir dir="${classes.dir}"/>
        <javac srcdir="${src.dir}" destdir="${classes.dir}" debug="true"/>
        <propertyfile file="${build.dir}/build-info.properties">
            <entry key="last.compile" value="${now}"/>
        </propertyfile>
    </target>

    </target>
    <!-- end::build-required[] -->

    <target name="compile" depends="buildRequiredProjects">
        <mkdir dir="${classes.dir}"/>
        <javac srcdir="${src.dir}" destdir="${classes.dir}" classpath="${root.dir}/util/${classes.dir}" debug="true"/>
    </target>

    <target name="package" depends="build">
        <jar destfile="${build.dir}/lib/hello-app.jar" basedir="${classes.dir}"/>

                module('org.test:maven:1.0:runtime') {
                    module('org.test:ivy:1.0') {
                        artifact(name: 'in-default')
                        module('org.test:in-default:1.0')
                    }
                }
            }
        }
    }

    def "a dependency on compile scope of maven module includes default of required ivy module when they are present"() {

            <format property="now" pattern="yyyy-MM-dd hh:mm:ss"/>
        </tstamp>
    </target>

    <target name="build" depends="prepare">
        <mkdir dir="${classes.dir}"/>
        <javac srcdir="${src.dir}" destdir="${classes.dir}" debug="true"/>
        <propertyfile file="${build.dir}/build-info.properties">
            <entry key="last.compile" value="${now}"/>
        </propertyfile>
    </target>

	err := os.WriteFile("testdata/hello", []byte("Hello, Gophers!"), 0666)
	if err != nil {
		log.Fatal(err)
	}
}

func ExampleMkdir() {
	err := os.Mkdir("testdir", 0750)
	if err != nil && !os.IsExist(err) {
		log.Fatal(err)
	}
	err = os.WriteFile("testdir/testfile.txt", []byte("Hello, Gophers!"), 0660)
	if err != nil {
		log.Fatal(err)
	}
}

func ExampleMkdirAll() {
	err := os.MkdirAll("test/subdir", 0750)

        collection as Set == toLinkedSet(file)
        collection as List == toList(file)
    }

    void toFileTreeReturnsSingletonTreeForEachFileInCollection() {
        File file = testDir.createFile("f1")
        File file2 = testDir.createFile("f2")

        TestFileCollection collection = new TestFileCollection(file, file2)
        FileTree tree = collection.getAsFileTree()

        expect: