feat(mcp): jsonrpc envelope types and error codes

internal/mcp/jsonrpc_test.go

@@ -0,0 +1,26 @@
+package mcp_test
+
+import (
+	"encoding/json"
+	"testing"
+
+	"gitea.d-ma.be/mathias/gitea-mcp/internal/mcp"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestRequestUnmarshal(t *testing.T) {
+	raw := []byte(`{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}`)
+	var req mcp.Request
+	require.NoError(t, json.Unmarshal(raw, &req))
+	assert.Equal(t, "2.0", req.JSONRPC)
+	assert.Equal(t, "initialize", req.Method)
+}
+
+func TestErrorResponseShape(t *testing.T) {
+	resp := mcp.NewErrorResponse(1, mcp.CodePermissionDenied, "no", nil)
+	b, _ := json.Marshal(resp)
+	assert.JSONEq(t,
+		`{"jsonrpc":"2.0","id":1,"error":{"code":-32001,"message":"no"}}`,
+		string(b))
+}