32 lines
899 B
Go
32 lines
899 B
Go
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package ephem
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import "testing"
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func TestGlobalDefaultInstanceIsStable(t *testing.T) {
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model, generation := Active(), Generation()
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first := Global()
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if first == nil || first.Model() != model {
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t.Fatalf("default instance = %v, active model = %v", first, model)
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}
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if second := Global(); second != first {
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t.Error("lazy default must retain its instance identity")
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}
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if Active() != model || Generation() != generation {
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t.Error("reading the default changed the active model or generation")
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}
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}
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func TestGlobalExplicitInstanceIsStable(t *testing.T) {
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previous := Global()
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t.Cleanup(func() { SetGlobal(previous) })
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custom := NewInstance(testEngine{marker: 7})
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SetGlobal(custom)
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if Global() != custom || Global() != custom {
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t.Error("explicit default lost its instance identity")
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}
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SetGlobal(nil)
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if Global() != custom {
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t.Error("nil must not replace an explicit default")
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}
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}
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