impl.snapshot { run language.compileTaskName }

        when:
        source api: ["class B { /* change */ }"]
        run "impl:${language.compileTaskName}"

        then:
        impl.noneRecompiled()
    }

    def "detects that changed class still has the same constants so no recompile is necessary"() {
        source api: ["class A { public static final int FOO = 123;}"],

                    }
                }
            }
        }
    }
"""
        and:
        run "mainExecutable"

        then:
        skipped compileTask

        and:
        outputs.noneRecompiled()

        where:
        testCase                       | headerDirs
        "extra header dir after"       | '"src/main/headers", "src/additional-headers"'

        outputs.snapshot { succeeds language.compileTaskName }

        when:
        resource.text = 'bar'

        then:
        succeeds language.compileTaskName
        outputs.noneRecompiled()
    }

                    }
                }
            }
        }
    }
"""
        and:
        run "mainExecutable"

        then:
        skipped compileTask
        outputs.noneRecompiled()

        where:
        testCase                       | headerDirs
        "extra header dir after"       | '"src/main/headers", "src/additional-headers"'

        source "class B extends A {}"

        outputs.snapshot { run language.compileTaskName }

        when:
        assert a.delete()
        then:
        fails language.compileTaskName
        outputs.noneRecompiled()
        outputs.deletedClasses 'A', 'B'
    }

    /**
     * Test scenario from {@link BaseIncrementalCompilationAfterFailureIntegrationTest#incremental compilation works after a compile failure()}

        includeExtensions.empty || includeExtensions.any {
            FileUtils.hasExtensionIgnoresCase(file.name, it)
        }
    }

    //asserts none of the files changed/added since last snapshot
    void noneRecompiled() {
        recompiledFiles([])
    }

    //asserts file changed/added since last snapshot
    void recompiledFile(File file) {
        recompiledFiles([file])
    }