tests: improve debugging config for test failure logs

Chain config implementations are not required to satisfy Stringer iface, which can result in illegible logs. Signed-off-by: meows <[email protected]>
NoteGio · Feb 5, 2020 · ba5afc9 · ba5afc9
1 parent f9c254e
commit ba5afc9
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/tests/difficulty_test_util.go b/tests/difficulty_test_util.go
@@ -139,10 +139,11 @@ func (test *DifficultyTest) Run(config ctypes.ChainConfigurator) error {
 	actual := ethash.CalcDifficulty(config, test.CurrentTimestamp, parent)
 	exp := test.CurrentDifficulty
 
+	b, _ := json.Marshal(config)
 	if actual.Cmp(exp) != 0 {
 		return fmt.Errorf(`%s got: %v, want: %v
 test: %v
-config: %s`, test.Name, actual, exp, test, config)
+config: %s`, test.Name, actual, exp, test, string(b))
 	}
 	return nil