succeeds "idea"

        then:
        ipr.languageLevel == "JDK_1_8"
        iml('root').languageLevel == "JDK_1_6"
        iml("child1").languageLevel == "JDK_1_7"
        iml("child2").languageLevel == "JDK_1_5"
        iml("child3").languageLevel == null
    }

    @ToBeFixedForConfigurationCache
    void "use project language level not source language level and target bytecode level when explicitly set"() {
        given:

        this.languageLevel = languageLevel;
    }

    /**
     * Sets the java language level for the project.
     * Pass a valid Java version number (e.g. '1.5') or IDEA language level (e.g. 'JDK_1_5').
     * <p>
     * See the examples in the docs for {@link IdeaProject}.
     * <p>
     * When explicitly set in the build script, this setting overrides any calculated values for Idea project
     * and Idea module.