optionsVerifier.with {
            minHeap("128m")
            maxHeap("128m")
            systemProperty("foo", "bar")
            jvmArgs("-Dbar=baz")
            defaultCharacterEncoding("UTF-8")
            enableAssertions()
            environmentVariable("foo", "bar")
            if (isOracleJDK) {
                bootstrapClasspath(normaliseFileSeparators(systemSpecificAbsolutePath('foo')))

        builder.jvmArgs("jvm1", "jvm2")
        builder.classpath(jar1, jar2)
        builder.systemProperty("prop", "value")
        builder.minHeapSize = "64m"
        builder.maxHeapSize = "1g"
        builder.defaultCharacterEncoding = inputEncoding

        when:
        List jvmArgs = builder.getAllJvmArgs()

        then:

        public void setEnvironment(Map<String, ?> environmentVariables) {
            throw new UnsupportedOperationException();
        }

        @Override
        public void setDefaultCharacterEncoding(String defaultCharacterEncoding) {
            throw new UnsupportedOperationException();
        }

        @Override
        public ProcessForkOptions environment(Map<String, ?> environmentVariables) {

    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setDefaultCharacterEncoding(String defaultCharacterEncoding) {
        forkOptions.setDefaultCharacterEncoding(defaultCharacterEncoding);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setMinHeapSize(String heapSize) {
        forkOptions.setMinHeapSize(heapSize);

     * Sets the default character encoding to use.
     *
     * Only makes sense for forking executers.
     *
     * @return this executer
     */
    GradleExecuter withDefaultCharacterEncoding(String defaultCharacterEncoding);

    /**
     * Sets the default locale to use.
     *
     * Only makes sense for forking executers.
     *
     * @return this executer
     */