func runSteps(t *testing.T, singleton bool, steps []step) {
logOut := &bytes.Buffer{}
logOut.WriteByte('\n')
logW := &iotool.SafeWriter{W: logOut}
defer func() {
logW.SetWriter(nil) // disable writes to avoid races
t.Log(logOut)
}()
dataOut := &bytes.Buffer{}
sim := simulator.New(singleton, dataOut, logW)
defer sim.Close()
for _, step := range steps {
if step.JSON != nil {
jsonData, _ := json.Marshal(step.JSON)
step.Cmd = fmt.Sprintf("%s %s", step.Cmd, string(jsonData))
}
fmt.Fprintf(logW, "== %s\n", step.Cmd)
sim.RunCommand(step.Cmd)
if step.Check != nil {
actual := reflect.New(reflect.Indirect(reflect.ValueOf(step.Check)).Type()).Interface()
if err := json.Unmarshal(dataOut.Bytes(), actual); err != nil {
t.Fatal("json decode error", err)
}
if diff := pretty.Compare(step.Check, actual); diff != "" {
t.Fatalf("check failed:\n%s", diff)
}
}
dataOut.Reset()
}
}
func ExampleCompare() {
type ShipManifest struct {
Name string
Crew map[string]string
Androids int
Stolen bool
}
reported := &ShipManifest{
Name: "Spaceship Heart of Gold",
Crew: map[string]string{
"Zaphod Beeblebrox": "Galactic President",
"Trillian": "Human",
"Ford Prefect": "A Hoopy Frood",
"Arthur Dent": "Along for the Ride",
},
Androids: 1,
Stolen: true,
}
expected := &ShipManifest{
Name: "Spaceship Heart of Gold",
Crew: map[string]string{
"Rowan Artosok": "Captain",
},
Androids: 1,
Stolen: false,
}
fmt.Println(pretty.Compare(reported, expected))
// Output:
// {
// Name: "Spaceship Heart of Gold",
// Crew: {
// - Arthur Dent: "Along for the Ride",
// - Ford Prefect: "A Hoopy Frood",
// - Trillian: "Human",
// - Zaphod Beeblebrox: "Galactic President",
// + Rowan Artosok: "Captain",
// },
// Androids: 1,
// - Stolen: true,
// + Stolen: false,
// }
}