feat(auth): X-Auth-Request-User context middleware

internal/auth/caller_test.go

@@ -0,0 +1,28 @@
+package auth_test
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"gitea.d-ma.be/mathias/gitea-mcp/internal/auth"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCallerFromContext(t *testing.T) {
+	called := false
+	h := auth.CallerMiddleware(http.HandlerFunc(func(_ http.ResponseWriter, r *http.Request) {
+		called = true
+		assert.Equal(t, "mathiasbq", auth.Caller(r.Context()))
+	}))
+	req := httptest.NewRequest(http.MethodPost, "/", nil)
+	req.Header.Set("X-Auth-Request-User", "mathiasbq")
+	rr := httptest.NewRecorder()
+	h.ServeHTTP(rr, req)
+	assert.True(t, called)
+}
+
+func TestCallerEmptyWhenHeaderMissing(t *testing.T) {
+	assert.Equal(t, "", auth.Caller(context.Background()))
+}