feat(gitea): typed error mapping from http status

internal/gitea/errors_test.go

@@ -0,0 +1,34 @@
+package gitea_test
+
+import (
+	"errors"
+	"testing"
+
+	"gitea.d-ma.be/mathias/gitea-mcp/internal/gitea"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestMapStatus(t *testing.T) {
+	cases := []struct {
+		status int
+		want   error
+	}{
+		{401, gitea.ErrPermissionDenied},
+		{403, gitea.ErrPermissionDenied},
+		{404, gitea.ErrNotFound},
+		{409, gitea.ErrConflict},
+		{422, gitea.ErrValidation},
+		{500, gitea.ErrUpstream},
+		{502, gitea.ErrUpstream},
+		{200, nil},
+		{299, nil},
+	}
+	for _, tc := range cases {
+		got := gitea.MapStatus(tc.status, []byte(`{"message":"x"}`))
+		if tc.want == nil {
+			assert.NoError(t, got)
+		} else {
+			assert.True(t, errors.Is(got, tc.want), "status %d", tc.status)
+		}
+	}
+}