Add TestingT.Fatal().

interface.go

@@ -7,6 +7,7 @@ package testkit
 type TestingT interface {
 	Log(args ...interface{})
 	Logf(f string, args ...interface{})
+	Fatal(args ...interface{})
 	FailNow()
 }
 

internal/testingmock/mock.go

@@ -24,6 +24,17 @@ func (t *T) Logf(f string, args ...interface{}) {
 	t.Logs = append(t.Logs, lines...)
 }
 
+// Fatal is an implementation of testing.TB.Fatal().
+func (t *T) Fatal(args ...interface{}) {
+	lines := strings.Split(fmt.Sprint(args...), "\n")
+	t.Logs = append(t.Logs, lines...)
+	t.Failed = true
+
+	if !t.FailSilently {
+		panic("test failed: " + lines[0])
+	}
+}
+
 // FailNow is an implementation of testing.TB.FailNow().
 func (t *T) FailNow() {
 	t.Failed = true

test.go

@@ -64,8 +64,7 @@ func (t *Test) Prepare(actions ...Action) *Test {
 				OperationOptions: t.options(nil, assert.Nothing),
 			},
 		); err != nil {
-			t.t.Log(err)
-			t.t.FailNow()
+			t.t.Fatal(err)
 		}
 	}
 
@@ -103,8 +102,7 @@ func (t *Test) Expect(act Action, e Expectation, options ...ExpectOption) {
 			OperationOptions: t.options(nil, e),
 		},
 	); err != nil {
-		t.t.Log(err)
-		t.t.FailNow()
+		t.t.Fatal(err)
 	}
 
 	t.end(e)
@@ -188,8 +186,7 @@ func (t *Test) Call(
 	)
 
 	if err := fn(); err != nil {
-		t.t.Log(err)
-		t.t.FailNow()
+		t.t.Fatal(err)
 	}
 
 	t.end(a)
@@ -224,8 +221,7 @@ func (t *Test) dispatch(
 	opts := t.options(options, e)
 
 	if err := t.engine.Dispatch(t.ctx, m, opts...); err != nil {
-		t.t.Log(err)
-		t.t.FailNow()
+		t.t.Fatal(err)
 	}
 }