val className = givenJavaClassInBuildSrcContains("""public void foo() { System.out.println("foo"); }""")
        withUniqueScript("$className().foo()")
        configureProject().assertBuildScriptCompiled().assertOutputContains("foo")

        givenJavaClassInBuildSrcContains("""public void foo() { System.out.println("bar"); }""")

        val packageName = givenKotlinScriptInBuildSrcContains(
            "Foo",
            """
            fun foo() {
                println("foo")
            }
            """
        )
        withUniqueScript("$packageName.foo()")
        configureProject().assertBuildScriptCompiled().assertOutputContains("foo")

        givenKotlinScriptInBuildSrcContains(
            "Foo",
            """
            fun foo() {

        withPrecompiledScriptPluginInBuildSrc(
            pluginId,
            """
                println("foo")
                tasks.register("foo")
            """
        )
        withUniqueScript(
            """
                plugins {
                    id("$pluginId")
                }
            """
        )
        configureProject().assertBuildScriptCompiled().assertOutputContains("foo")

            """
            class $className {
                $classBody
            }
            """
        )
        return "$packageName.$className"
    }

    protected
    fun withUniqueScript(script: String) = withBuildScript(script).apply {
        bustScriptCache()
    }

    protected
    fun configureProject(vararg tasks: String): BuildOperationsAssertions {