Function TestDeferredErr

types/lazy/deferred_test.go:159–202

(t *testing.T)

}

func TestDeferredErr(t *testing.T) {
	tests := []struct {
		name    string
		funcs   []func() error
		wantErr error
	}{
		{
			name:    "no-funcs",
			wantErr: nil,
		},
		{
			name:    "no-error",
			funcs:   []func() error{func() error { return nil }},
			wantErr: nil,
		},
		{
			name: "error",
			funcs: []func() error{
				func() error { return nil },
				func() error { return errors.New("bang!") },
				func() error { return errors.New("unreachable") },
			},
			wantErr: errors.New("bang!"),
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			var di DeferredInit
			for _, f := range tt.funcs {
				di.MustDefer(f)
			}

			var wg sync.WaitGroup
			N := 10000
			for range N {
				wg.Go(func() {
					gotErr := di.Do()
					checkError(t, gotErr, tt.wantErr, false)
				})
			}
			wg.Wait()
		})
	}
}

// TestDeferAfterDo checks all of the following:
// - Deferring a function before [DeferredInit.Do] is called should always succeed.