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Add example for Call.Do and Call.DoAndReturn (#470)
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package gomock_test | ||
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import ( | ||
"fmt" | ||
"testing" | ||
"time" | ||
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"github.com/golang/mock/gomock" | ||
mock_sample "github.com/golang/mock/sample/mock_user" | ||
) | ||
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func ExampleCall_DoAndReturn_latency() { | ||
t := &testing.T{} // provided by test | ||
ctrl := gomock.NewController(t) | ||
mockIndex := mock_sample.NewMockIndex(ctrl) | ||
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mockIndex.EXPECT().Get(gomock.Any()).DoAndReturn( | ||
// signature of anonymous function must have the same number of input and output arguments as the mocked method. | ||
func(arg string) string { | ||
time.Sleep(1 * time.Millisecond) | ||
return "I'm sleepy" | ||
}, | ||
) | ||
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r := mockIndex.Get("foo") | ||
fmt.Println(r) | ||
// Output: I'm sleepy | ||
} | ||
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func ExampleCall_DoAndReturn_captureArguments() { | ||
t := &testing.T{} // provided by test | ||
ctrl := gomock.NewController(t) | ||
mockIndex := mock_sample.NewMockIndex(ctrl) | ||
var s string | ||
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mockIndex.EXPECT().Get(gomock.AssignableToTypeOf(s)).DoAndReturn( | ||
// signature of anonymous function must have the same number of input and output arguments as the mocked method. | ||
func(arg string) interface{} { | ||
s = arg | ||
return "I'm sleepy" | ||
}, | ||
) | ||
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r := mockIndex.Get("foo") | ||
fmt.Printf("%s %s", r, s) | ||
// Output: I'm sleepy foo | ||
} | ||
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func ExampleCall_Do_latency() { | ||
t := &testing.T{} // provided by test | ||
ctrl := gomock.NewController(t) | ||
mockIndex := mock_sample.NewMockIndex(ctrl) | ||
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mockIndex.EXPECT().Anon(gomock.Any()).Do( | ||
// signature of anonymous function must have the same number of input and output arguments as the mocked method. | ||
func(_ string) { | ||
fmt.Println("sleeping") | ||
time.Sleep(1 * time.Millisecond) | ||
}, | ||
) | ||
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mockIndex.Anon("foo") | ||
// Output: sleeping | ||
} | ||
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func ExampleCall_Do_captureArguments() { | ||
t := &testing.T{} // provided by test | ||
ctrl := gomock.NewController(t) | ||
mockIndex := mock_sample.NewMockIndex(ctrl) | ||
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var s string | ||
mockIndex.EXPECT().Anon(gomock.AssignableToTypeOf(s)).Do( | ||
// signature of anonymous function must have the same number of input and output arguments as the mocked method. | ||
func(arg string) { | ||
s = arg | ||
}, | ||
) | ||
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mockIndex.Anon("foo") | ||
fmt.Println(s) | ||
// Output: foo | ||
} |