return ErrBodylessRequest on get method etc.

rest/httpx/requests_test.go

@@ -134,6 +134,26 @@ func BenchmarkParseRaw(b *testing.B) {
 	}
 }
 
+func TestParseJsonBodyless(t *testing.T) {
+	methods := []string{
+		http.MethodConnect,
+		http.MethodGet,
+		http.MethodHead,
+		http.MethodOptions,
+		http.MethodTrace,
+	}
+
+	for _, method := range methods {
+		t.Run(method, func(t *testing.T) {
+			r, err := http.NewRequest(http.MethodGet, "http://hello.com", nil)
+			if err != nil {
+				t.Fatal(err)
+			}
+			assert.Equal(t, ErrBodylessRequest, ParseJsonBody(r, nil))
+		})
+	}
+}
+
 func BenchmarkParseAuto(b *testing.B) {
 	r, err := http.NewRequest(http.MethodGet, "http://hello.com/a?name=hello&age=18&percent=3.4", nil)
 	if err != nil {