func TestDetectDuplicates(t *testing.T) {
	plugs := []*Plugin{
		mockPlugin("foo"),
		mockPlugin("bar"),
	}
	if err := detectDuplicates(plugs); err != nil {
		t.Error("no duplicates in the first set")
	}
	plugs = append(plugs, mockPlugin("foo"))
	if err := detectDuplicates(plugs); err == nil {
		t.Error("duplicates in the second set")
	}
}
The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.