fix: tempdir delegate (#57)

test/caller_test.go

@@ -94,7 +94,7 @@ var (
 	}()
 	// CallerTestErrorf provides the file with the line number of the `Errorf`
 	// call in testing.
-	CallerTestErrorf = path.Join(SourceDir, "testing.go:176")
+	CallerTestErrorf = path.Join(SourceDir, "testing.go:180")
 	// CallerGomockErrorf provides the file with the line number of the
 	// `Errorf` call in gomock.
 	CallerGomockErrorf = path.Join(SourceDir, "gomock.go:61")

test/testing.go

@@ -105,7 +105,6 @@ type Cleanuper interface {
 // can be used as a drop in replacement for `testing.T` in various libraries
 // to check for expected test failures.
 type Tester struct {
-	Test
 	sync.Synchronizer
 	t        Test
 	wg       sync.WaitGroup
@@ -159,6 +158,11 @@ func (t *Tester) Name() string {
 	return t.t.Name()
 }
 
+// TempDir delegates the request to the parent test context.
+func (t *Tester) TempDir() string {
+	return t.t.TempDir()
+}
+
 // Helper delegates request to the parent test context.
 func (t *Tester) Helper() {
 	t.t.Helper()

test/testing_test.go

@@ -252,6 +252,13 @@ type ParamParam struct {
 	expect bool
 }
 
+func TestTempDir(t *testing.T) {
+	test.New[ParamParam](t, ParamParam{expect: true}).
+		Run(func(t test.Test, param ParamParam) {
+			assert.NotEmpty(t, t.TempDir())
+		})
+}
+
 func TestNameCastFallback(t *testing.T) {
 	test.New[ParamParam](t, ParamParam{name: "value"}).
 		Run(func(t test.Test, param ParamParam) {