41 lines
722 B
Go
41 lines
722 B
Go
package hub
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import "testing"
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const testKind Kind = 1
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const testValue = "foo"
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type testEvent string
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func (e testEvent) Kind() Kind {
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return testKind
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}
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func TestPubSub(t *testing.T) {
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var h Hub
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var s string
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h.Subscribe(testKind, func(e Event) { s = string(e.(testEvent)) })
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h.Publish(testEvent(testValue))
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if s != testValue {
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t.Errorf("invalid value: %s", s)
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}
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}
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func TestCancel(t *testing.T) {
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var h Hub
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var called int
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var f = func(e Event) { called += 1 }
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_ = h.Subscribe(testKind, f)
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cancel := h.Subscribe(testKind, f)
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h.Publish(testEvent(testValue)) // 2 calls to f
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cancel()
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h.Publish(testEvent(testValue)) // 1 call to f
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if called != 3 {
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t.Errorf("unexpected call count: %d", called)
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}
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}
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