move warning to dedicated unmarshal test

Signed-off-by: Florian Lehner <florian.lehner@elastic.co>

zapcore/level_test.go

@@ -57,14 +57,13 @@ func TestLevelText(t *testing.T) {
 		{"info", InfoLevel},
 		{"", InfoLevel}, // make the zero value useful
 		{"warn", WarnLevel},
-		{"warning", WarnLevel}, // compatibility handling for packages that emit "warning" instead of "warn"
 		{"error", ErrorLevel},
 		{"dpanic", DPanicLevel},
 		{"panic", PanicLevel},
 		{"fatal", FatalLevel},
 	}
 	for _, tt := range tests {
-		if tt.text != "" && tt.text != "warning" {
+		if tt.text != "" {
 			lvl := tt.level
 			marshaled, err := lvl.MarshalText()
 			assert.NoError(t, err, "Unexpected error marshaling level %v to text.", &lvl)
@@ -76,6 +75,17 @@ func TestLevelText(t *testing.T) {
 		assert.NoError(t, err, `Unexpected error unmarshaling text %q to level.`, tt.text)
 		assert.Equal(t, tt.level, unmarshaled, `Text %q unmarshaled to an unexpected level.`, tt.text)
 	}
+
+	// Some logging libraries are using "warning" instead of "warn" as level indicator. Handle this case
+	// for cross compatability.
+	t.Run("unmarshal warning compatability", func(t *testing.T) {
+		var unmarshaled Level
+		input := []byte("warning")
+		err := unmarshaled.UnmarshalText(input)
+		assert.NoError(t, err, `Unexpected error unmarshaling text %q to level.`, string(input))
+		assert.Equal(t, WarnLevel, unmarshaled, `Text %q unmarshaled to an unexpected level.`, string(input))
+
+	})
 }
 
 func TestParseLevel(t *testing.T) {