reflect: add TestClearMap

Author: Ben Krieger

src/reflect/value_test.go

@@ -765,6 +765,32 @@ func TestClearSlice(t *testing.T) {
 	}
 }
 
+func TestClearMap(t *testing.T) {
+	for _, test := range []struct {
+		m      any
+		expect any
+	}{
+		{
+			m:      map[int]bool{1: true, 2: false, 3: true},
+			expect: map[int]bool{},
+		},
+		{
+			m:      map[string][]byte{"hello": []byte("world")},
+			expect: map[string][]byte{},
+		},
+	} {
+		v := ValueOf(test.m)
+
+		v.Clear()
+		if len := v.Len(); len != 0 {
+			t.Errorf("Clear(map) should set len to 0, got %d", len)
+		}
+		if !DeepEqual(test.m, test.expect) {
+			t.Errorf("Clear(map) got %v, expected %v", test.m, test.expect)
+		}
+	}
+}
+
 func TestIssue4040(t *testing.T) {
 	var value interface{} = uint16(0)