lnrpc: test witness type mapping

lnrpc/walletrpc/walletkit_server_test.go

@@ -0,0 +1,50 @@
+//go:build walletrpc
+// +build walletrpc
+
+package walletrpc
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+// TestWitnessTypeMapping tests that the two witness type enums in the `input`
+// package and the `walletrpc` package remain equal.
+func TestWitnessTypeMapping(t *testing.T) {
+	t.Parallel()
+
+	// Tests that both enum types have the same length except the
+	// UNKNOWN_WITNESS type which is only present in the walletrpc
+	// witness type enum.
+	require.Equal(
+		t, len(allWitnessTypes), len(WitnessType_name)-1,
+		"number of witness types should match proto definition",
+	)
+
+	// Tests that the string representations of both enum types are
+	// equivalent.
+	for witnessType, witnessTypeProto := range allWitnessTypes {
+		// Redeclare to avoid loop variables being captured
+		// by func literal.
+		witnessType := witnessType
+		witnessTypeProto := witnessTypeProto
+
+		t.Run(witnessType.String(), func(tt *testing.T) {
+			tt.Parallel()
+
+			witnessTypeName := witnessType.String()
+			witnessTypeName = strings.ToUpper(witnessTypeName)
+			witnessTypeProtoName := witnessTypeProto.String()
+			witnessTypeProtoName = strings.ReplaceAll(
+				witnessTypeProtoName, "_", "",
+			)
+
+			require.Equal(
+				t, witnessTypeName, witnessTypeProtoName,
+				"mapped witness types should be named the same",
+			)
+		})
+	}
+}