69 lines
1.0 KiB
Go
69 lines
1.0 KiB
Go
package isnil
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import (
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"testing"
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)
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type foo struct{}
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func TestIsNil(t *testing.T) {
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cases := []struct {
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in interface{}
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exp bool
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}{
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{1, false},
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{"nope", false},
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{foo{}, false},
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{&foo{}, false},
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{nil, true},
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{(*foo)(nil), true},
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{(interface{})(nil), true},
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}
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for _, tcase := range cases {
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if out := IsNil(tcase.in); out != tcase.exp {
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if tcase.exp {
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t.Errorf("Expected %++v to be nil", tcase.in)
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} else {
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t.Errorf("Expected %++v to not be nil", tcase.in)
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}
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}
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}
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}
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func BenchmarkEqNilBasic(b *testing.B) {
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var v *int
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for i := 0; i < b.N; i++ {
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_ = (v != nil)
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}
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}
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func BenchmarkEqNilInterface(b *testing.B) {
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var v interface{}
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v = (*foo)(nil)
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for i := 0; i < b.N; i++ {
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_ = (v != nil)
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}
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}
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func BenchmarkIsNilBasic(b *testing.B) {
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var v *int
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for i := 0; i < b.N; i++ {
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IsNil(v)
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}
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}
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func BenchmarkIsNilInterface(b *testing.B) {
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var v interface{}
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v = (*foo)(nil)
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for i := 0; i < b.N; i++ {
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IsNil(v)
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}
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}
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func BenchmarkIsNilNil(b *testing.B) {
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for i := 0; i < b.N; i++ {
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IsNil(nil)
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}
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}
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