return -1;
                    }
                }

                @TaskAction void execute() {}
            }
        """

        expect:
        assertValidationFailsWith([
            error(missingAnnotationConfig { type('MyTask').property('badTime').missingInputOrOutput() }, 'validation_problems', 'missing_annotation'),

                    Tree right

                    String nonAnnotated
                }

                @TaskAction void execute() {}
            }
        """

        expect:
        assertValidationFailsWith([
            error(missingAnnotationConfig { type('MyTask').property('tree.nonAnnotated').missingInputOrOutput() }, 'validation_problems', 'missing_annotation'),

                    @Optional @Nested
                    Tree right

                    String nonAnnotated
                }
            }
        """

        expect:
        assertValidationFailsWith([error(missingAnnotationConfig { type('MyTask').property('tree.nonAnnotated').missingInputOrOutput() }, 'validation_problems', 'missing_annotation')])

        and:
        verifyAll(receivedProblem) {

    String getKeySymbolFor(String name) {
        '.<key>'
    }

    @Override
    void assertValidationSucceeds() {
        succeeds "validatePlugins"
    }

    @Override
    void assertValidationFailsWith(List<AbstractPluginValidationIntegrationSpec.DocumentedProblem> messages) {
        fails "validatePlugins"
        def report = new TaskValidationReportFixture(file("build/reports/plugin-development/validation-report.json"))

        ".$name"
    }

    @Override
    void assertValidationSucceeds() {
        succeeds "run"
        result.assertTaskNotSkipped(":run")
    }

    void assertValidationFailsWith(List<AbstractPluginValidationIntegrationSpec.DocumentedProblem> messages) {
        def expectedDeprecations = messages
            .findAll { problem -> problem.severity == WARNING }
        def expectedFailures = messages

                public NestedBean getNestedBean() { return nested; }
            }
        """

        expect:
        executer.withArgument("-Dorg.gradle.internal.max.validation.errors=7")
        assertValidationFailsWith([
            warning(unsupportedValueTypeConfig { type('MyTask').property('direct').propertyType('URL') }, "validation_problems", "unsupported_value_type"),