class TestComponent implements SoftwareComponentInternal, ComponentWithVariants {
                String name
                Set usages = []
                Set variants = []
            }

            class TestUsage implements UsageContext {
                String name
                Usage usage
                Set dependencies = []
                Set dependencyConstraints = []
                Set artifacts = []

            class TestComponent implements SoftwareComponentInternal, ComponentWithVariants {
                String name
                Set usages = []
                Set variants = []
            }

            class TestUsage implements UsageContext {
                String name
                Usage usage
                Set dependencies = []
                Set dependencyConstraints = []
                Set artifacts = []

				ok = g.Get() == time.Duration(7)
			}
			if !ok {
				t.Errorf("Visit: bad value %T(%v) for %s", g.Get(), g.Get(), f.Name)
			}
		}
	}
	VisitAll(visitor)
}

func TestUsage(t *testing.T) {
	called := false
	ResetForTesting(func() { called = true })
	if CommandLine.Parse([]string{"-x"}) == nil {
		t.Error("parse did not fail for unknown flag")
	}
	if !called {