54 lines
1.1 KiB
Go
54 lines
1.1 KiB
Go
package singleton_test
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import (
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"testing"
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"github.com/navidrome/navidrome/utils/singleton"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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func TestSingleton(t *testing.T) {
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RegisterFailHandler(Fail)
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RunSpecs(t, "Singleton Suite")
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}
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var _ = Describe("Get", func() {
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type T struct{ val int }
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var wasCalled bool
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var instance interface{}
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constructor := func() interface{} {
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wasCalled = true
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return &T{}
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}
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BeforeEach(func() {
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instance = singleton.Get(T{}, constructor)
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})
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It("calls the constructor to create a new instance", func() {
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Expect(wasCalled).To(BeTrue())
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Expect(instance).To(BeAssignableToTypeOf(&T{}))
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})
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It("does not call the constructor the next time", func() {
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instance.(*T).val = 10
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wasCalled = false
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newInstance := singleton.Get(T{}, constructor)
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Expect(newInstance.(*T).val).To(Equal(10))
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Expect(wasCalled).To(BeFalse())
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})
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It("does not call the constructor even if a pointer is passed as the object", func() {
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instance.(*T).val = 20
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wasCalled = false
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newInstance := singleton.Get(&T{}, constructor)
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Expect(newInstance.(*T).val).To(Equal(20))
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Expect(wasCalled).To(BeFalse())
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})
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})
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