Add test for pre swap state PDA (#45)

Author: jeffyanta

pkg/solana/swapvalidator/address_test.go

@@ -0,0 +1,21 @@
+package swap_validator
+
+import (
+	"testing"
+
+	"github.com/mr-tron/base58"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// Tests based on account created here https://solscan.io/tx/4kXywqQRqJXRnm8mzAVRYkL1YVwyAEi8rVVNzRYG3AAu73xqjxNdHKX6LgoFhon66ZWHJ8HU3QkAmiot7AGzXPzd
+
+func TestPreSwapStateAddress(t *testing.T) {
+	address, _, err := GetPreSwapStateAddress(&GetPreSwapStateAddressArgs{
+		Source:      mustBase58Decode("5nNBW1KhzHVbR4NMPLYPRYj3UN5vgiw5GrtpdK6eGoce"),
+		Destination: mustBase58Decode("9Rgx4kjnYZBbeXXgbbYLT2FfgzrNHFUShDtp8dpHHjd2"),
+		Nonce:       mustBase58Decode("3SVPEF5HDcKLhVfKeAnbH5Azpyeuk2yyVjEjZbz4VhrL"),
+	})
+	require.NoError(t, err)
+	assert.Equal(t, "Hh338LHJhkzPbDisGt5Lge8qkgc3RExvH7BdmKgnRQw9", base58.Encode(address))
+}