Add tests for OnLevelParseError

Author: colega

configs_test.go

@@ -0,0 +1,54 @@
+package logrusiowriter
+
+import (
+	"testing"
+
+	"github.com/sirupsen/logrus"
+)
+
+func TestWithConfig(t *testing.T) {
+	t.Run("can't parse level, configures info level by default", func(t *testing.T) {
+		expectedLevel := logrus.InfoLevel
+
+		cfg := Config{
+			Level:  "none",
+			Fields: logrus.Fields{},
+		}
+
+		w := New(WithConfig(cfg))
+
+		configuredLevel := w.(*writer).level
+		if configuredLevel != expectedLevel {
+			t.Errorf("Configured level should be %s, but it was %s", expectedLevel, configuredLevel)
+		}
+	})
+
+	t.Run("custom OnLevelParseError", func(t *testing.T) {
+		originalOnLevelParseError := OnLevelParseError
+		defer func() { OnLevelParseError = originalOnLevelParseError }()
+
+		expectedLevel := logrus.WarnLevel
+
+		cfg := Config{
+			Level:  "none",
+			Fields: logrus.Fields{},
+		}
+
+		var providedErr error
+		OnLevelParseError = func(err error) logrus.Level {
+			providedErr = err
+			return expectedLevel
+		}
+
+		w := New(WithConfig(cfg))
+
+		configuredLevel := w.(*writer).level
+		if configuredLevel != expectedLevel {
+			t.Errorf("Configured level should be %s, but it was %s", expectedLevel, configuredLevel)
+		}
+
+		if providedErr == nil {
+			t.Errorf("Error provided to OnLevelParseError should not be nil")
+		}
+	})
+}