fix: correct the compressor choose --add UT

Signed-off-by: xkx <[email protected]>

lib/util/lifted/influx/httpd/handler_compress_test.go

@@ -0,0 +1,147 @@
+// Copyright 2024 openGemini Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package httpd
+
+import (
+	"compress/gzip"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/klauspost/compress/zstd"
+)
+
+func TestCompressFilter_Gzip(t *testing.T) {
+	handler := compressFilter(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("test response"))
+	}))
+
+	req := httptest.NewRequest("GET", "/", nil)
+	req.Header.Set("Accept-Encoding", "gzip")
+	w := httptest.NewRecorder()
+
+	handler.ServeHTTP(w, req)
+
+	resp := w.Result()
+	defer resp.Body.Close()
+
+	if resp.Header.Get("Content-Encoding") != "gzip" {
+		t.Errorf("expected gzip encoding, got %s", resp.Header.Get("Content-Encoding"))
+	}
+
+	gzReader, err := gzip.NewReader(resp.Body)
+	if err != nil {
+		t.Fatalf("failed to create gzip reader: %v", err)
+	}
+	defer gzReader.Close()
+
+	body, err := io.ReadAll(gzReader)
+	if err != nil {
+		t.Fatalf("failed to read gzip body: %v", err)
+	}
+
+	if string(body) != "test response" {
+		t.Errorf("expected body 'test response', got %s", string(body))
+	}
+}
+
+func TestCompressFilter_Zstd(t *testing.T) {
+	handler := compressFilter(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("test response"))
+	}))
+
+	req := httptest.NewRequest("GET", "/", nil)
+	req.Header.Set("Accept-Encoding", "zstd")
+	w := httptest.NewRecorder()
+
+	handler.ServeHTTP(w, req)
+
+	resp := w.Result()
+	defer resp.Body.Close()
+
+	if resp.Header.Get("Content-Encoding") != "zstd" {
+		t.Errorf("expected zstd encoding, got %s", resp.Header.Get("Content-Encoding"))
+	}
+
+	zstdReader, err := zstd.NewReader(resp.Body)
+	if err != nil {
+		t.Fatalf("failed to create zstd reader: %v", err)
+	}
+	defer zstdReader.Close()
+
+	body, err := io.ReadAll(zstdReader)
+	if err != nil {
+		t.Fatalf("failed to read zstd body: %v", err)
+	}
+
+	if string(body) != "test response" {
+		t.Errorf("expected body 'test response', got %s", string(body))
+	}
+}
+
+func TestCompressFilter_NoEncoding(t *testing.T) {
+	handler := compressFilter(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("test response"))
+	}))
+
+	req := httptest.NewRequest("GET", "/", nil)
+	w := httptest.NewRecorder()
+
+	handler.ServeHTTP(w, req)
+
+	resp := w.Result()
+	defer resp.Body.Close()
+
+	if resp.Header.Get("Content-Encoding") != "" {
+		t.Errorf("expected no encoding, got %s", resp.Header.Get("Content-Encoding"))
+	}
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		t.Fatalf("failed to read body: %v", err)
+	}
+
+	if string(body) != "test response" {
+		t.Errorf("expected body 'test response', got %s", string(body))
+	}
+}
+
+func TestCompressFilter_UnsupportedEncoding(t *testing.T) {
+	handler := compressFilter(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("test response"))
+	}))
+
+	req := httptest.NewRequest("GET", "/", nil)
+	req.Header.Set("Accept-Encoding", "br")
+	w := httptest.NewRecorder()
+
+	handler.ServeHTTP(w, req)
+
+	resp := w.Result()
+	defer resp.Body.Close()
+
+	if resp.Header.Get("Content-Encoding") != "" {
+		t.Errorf("expected no encoding, got %s", resp.Header.Get("Content-Encoding"))
+	}
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		t.Fatalf("failed to read body: %v", err)
+	}
+
+	if string(body) != "test response" {
+		t.Errorf("expected body 'test response', got %s", string(body))
+	}
+}