package clock import ( "reflect" "testing" ) // Clock type API: // // New(hour, minute int) Clock // a "constructor" // (Clock) String() string // a "stringer" // (Clock) Add(minutes int) Clock // // The Add method should also handle subtraction by accepting negative values. // To satisfy the readme requirement about clocks being equal, values of // your Clock type need to work with the == operator. // // It might help to study the time.Time type in the standard library // (https://golang.org/pkg/time/#Time) as a model. See how constructors there // (Date and Now) return Time values rather than pointers. Note also how // most time.Time methods have value receivers rather than pointer receivers. // For more background on this read // https://github.com/golang/go/wiki/CodeReviewComments#receiver-type. const targetTestVersion = 4 func TestCreateClock(t *testing.T) { if testVersion != targetTestVersion { t.Fatalf("Found testVersion = %v, want %v", testVersion, targetTestVersion) } for _, n := range timeTests { if got := New(n.h, n.m); got.String() != n.want { t.Fatalf("New(%d, %d) = %q, want %q", n.h, n.m, got, n.want) } } t.Log(len(timeTests), "test cases") } func TestAddMinutes(t *testing.T) { for _, a := range addTests { if got := New(a.h, a.m).Add(a.a); got.String() != a.want { t.Fatalf("New(%d, %d).Add(%d) = %q, want %q", a.h, a.m, a.a, got, a.want) } } t.Log(len(addTests), "test cases") } func TestCompareClocks(t *testing.T) { for _, e := range eqTests { clock1 := New(e.c1.h, e.c1.m) clock2 := New(e.c2.h, e.c2.m) got := clock1 == clock2 if got != e.want { t.Log("Clock1:", clock1) t.Log("Clock2:", clock2) t.Logf("Clock1 == Clock2 is %t, want %t", got, e.want) if reflect.DeepEqual(clock1, clock2) { t.Log("(Hint: see comments in clock_test.go.)") } t.FailNow() } } t.Log(len(eqTests), "test cases") } func BenchmarkAddMinutes(b *testing.B) { c := New(12, 0) b.ResetTimer() for i := 0; i < b.N; i++ { for _, a := range addTests { c.Add(a.a) } } } func BenchmarkCreateClocks(b *testing.B) { for i := 0; i < b.N; i++ { for _, n := range timeTests { New(n.h, n.m) } } }