feat: initial commit - kratos admin service

pkg/auth/middleware_test.go

@@ -0,0 +1,125 @@
+package auth
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	v1 "kra/api/kratos/admin/v1"
+)
+
+// errorBody mirrors the wire shape of kratos errors.Status.
+type errorBody struct {
+	Code    int32  `json:"code"`
+	Reason  string `json:"reason"`
+	Message string `json:"message"`
+}
+
+// serve runs the middleware over a handler that records whether it was reached.
+func serve(t *testing.T, req *http.Request) (*httptest.ResponseRecorder, bool) {
+	t.Helper()
+	reached := false
+	handler := Middleware()(http.HandlerFunc(func(http.ResponseWriter, *http.Request) {
+		reached = true
+	}))
+	rec := httptest.NewRecorder()
+	handler.ServeHTTP(rec, req)
+	return rec, reached
+}
+
+// The middleware runs outside the kratos handler chain, so it has to invoke the
+// error encoder itself. These tests pin the body down as structured protojson:
+// writing plain text here would leave clients unable to read code / reason.
+func TestMiddlewareRejectsMissingCookie(t *testing.T) {
+	req := httptest.NewRequest(http.MethodGet, "/v1/admins/current", nil)
+	req.Header.Set("Accept", "application/protojson")
+
+	rec, reached := serve(t, req)
+
+	if reached {
+		t.Fatal("handler was reached without a credential")
+	}
+	if rec.Code != http.StatusUnauthorized {
+		t.Fatalf("status = %d, want %d", rec.Code, http.StatusUnauthorized)
+	}
+	if ct := rec.Header().Get("Content-Type"); ct != "application/protojson" {
+		t.Fatalf("Content-Type = %q, want application/protojson", ct)
+	}
+	var body errorBody
+	if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
+		t.Fatalf("body is not JSON (%v): %s", err, rec.Body.String())
+	}
+	if body.Code != http.StatusUnauthorized {
+		t.Errorf("body code = %d, want %d", body.Code, http.StatusUnauthorized)
+	}
+	if want := v1.ErrorReason_UNAUTHENTICATED.String(); body.Reason != want {
+		t.Errorf("body reason = %q, want %q", body.Reason, want)
+	}
+}
+
+func TestMiddlewareRejectsInvalidToken(t *testing.T) {
+	req := httptest.NewRequest(http.MethodGet, "/v1/admins/current", nil)
+	req.Header.Set("Accept", "application/protojson")
+	req.AddCookie(&http.Cookie{Name: cookieName, Value: "not-a-jwt"})
+
+	rec, reached := serve(t, req)
+
+	if reached {
+		t.Fatal("handler was reached with an invalid token")
+	}
+	if rec.Code != http.StatusUnauthorized {
+		t.Fatalf("status = %d, want %d", rec.Code, http.StatusUnauthorized)
+	}
+	if ct := rec.Header().Get("Content-Type"); ct != "application/protojson" {
+		t.Fatalf("Content-Type = %q, want application/protojson", ct)
+	}
+	var body errorBody
+	if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
+		t.Fatalf("body is not JSON (%v): %s", err, rec.Body.String())
+	}
+	if body.Code != http.StatusUnauthorized {
+		t.Errorf("body code = %d, want %d", body.Code, http.StatusUnauthorized)
+	}
+	if want := v1.ErrorReason_UNAUTHENTICATED.String(); body.Reason != want {
+		t.Errorf("body reason = %q, want %q", body.Reason, want)
+	}
+}
+
+// The reason constants in this package are declared locally so `pkg` stays free
+// of any domain's generated proto. That freedom is only safe if the two stay in
+// step, which is what this test enforces.
+func TestReasonsMatchAPIEnum(t *testing.T) {
+	if want := v1.ErrorReason_UNAUTHENTICATED.String(); reasonUnauthenticated != want {
+		t.Errorf("reasonUnauthenticated = %q, want %q", reasonUnauthenticated, want)
+	}
+	if want := v1.ErrorReason_PERMISSION_DENIED.String(); reasonPermissionDenied != want {
+		t.Errorf("reasonPermissionDenied = %q, want %q", reasonPermissionDenied, want)
+	}
+}
+
+func TestMiddlewareAllowsValidToken(t *testing.T) {
+	token, err := GenerateToken(42, "admin", authSecretKey, time.Now().Add(time.Hour))
+	if err != nil {
+		t.Fatalf("GenerateToken: %v", err)
+	}
+	req := httptest.NewRequest(http.MethodGet, "/v1/admins/current", nil)
+	req.AddCookie(&http.Cookie{Name: cookieName, Value: token})
+
+	rec, reached := serve(t, req)
+
+	if !reached {
+		t.Fatalf("handler was not reached, status = %d body = %s", rec.Code, rec.Body.String())
+	}
+}
+
+func TestMiddlewareSkipsNoAuthPaths(t *testing.T) {
+	req := httptest.NewRequest(http.MethodPost, "/v1/admins/login", nil)
+
+	_, reached := serve(t, req)
+
+	if !reached {
+		t.Fatal("login path should not require authentication")
+	}
+}