IsNotJSON(t *testing.T) {  mockT := new(MockT)  JSONEq(mockT, `{"foo": "bar"}`, "Not JSON")  if !mockT.Failed {   t.Error("Check should fail")  } }  func TestJSONEq_ExpectedIsNotJSON(t *testing.T) {  mockT := new(MockT)  JSONEq(mockT, "Not JSON", `{"foo": "bar", "hello": "world"}`)  if !mockT.Failed {   t.Error("Check should fail")  } }  func TestJSONEq_Expected