Add "TestNewWarn" convenience function

testing.go

@@ -16,6 +16,16 @@ func TestNew(tb testing.TB, options ...zap.Option) (*zap.Logger, *observer.Obser
 	return TestNewWithLevel(tb, zapcore.DebugLevel, options...)
 }
 
+// TestNewWarn is equal to TestNew, except that it sets the minimum log level
+// required to record an entry in the recorder to "Warn". This convenience
+// function can be used to validate that no warnings, or errors are logged when
+// testing a unit of code.
+func TestNewWarn(tb testing.TB, options ...zap.Option) (*zap.Logger, *observer.ObservedLogs) {
+	tb.Helper()
+
+	return TestNewWithLevel(tb, zapcore.WarnLevel, options...)
+}
+
 // TestNewWithLevel is equal to TestNew, except that it takes an extra argument,
 // dictating the minimum log level required to record an entry in the recorder.
 func TestNewWithLevel(tb testing.TB, level zapcore.LevelEnabler, options ...zap.Option) (*zap.Logger, *observer.ObservedLogs) {

testing_test.go

@@ -21,14 +21,27 @@ func TestTestNew(t *testing.T) {
 	assert.Len(t, logs.All(), 1)
 }
 
+func TestTestNewWarn(t *testing.T) {
+	t.Parallel()
+
+	logger, logs := logger.TestNewWarn(t)
+	logger.Debug("")
+	logger.Warn("")
+	logger.Error("")
+
+	require.Len(t, logs.All(), 2)
+	assert.Equal(t, zapcore.WarnLevel, logs.All()[0].Level)
+	assert.Equal(t, zapcore.ErrorLevel, logs.All()[1].Level)
+}
+
 func TestTestNewWithLevel(t *testing.T) {
 	t.Parallel()
 
 	logger, logs := logger.TestNewWithLevel(t, zapcore.ErrorLevel)
 	logger.Debug("")
 	logger.Warn("")
-	logger.Error("error")
-	logger.DPanic("dpanic")
+	logger.Error("")
+	logger.DPanic("")
 
 	require.Len(t, logs.All(), 2)
 	assert.Equal(t, zapcore.ErrorLevel, logs.All()[0].Level)