add test for types.ExchangeName

pkg/types/exchange_test.go

@@ -0,0 +1,17 @@
+package types
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_exchangeName(t *testing.T) {
+	assert.Equal(t, ExchangeMax.String(), "max")
+	name, err := ValidExchangeName("binance")
+	assert.Equal(t, name, ExchangeName("binance"))
+	assert.NoError(t, err)
+	_, err = ValidExchangeName("dummy")
+	assert.Error(t, err)
+	assert.True(t, ExchangeMax.IsValid())
+}