test(compress): Add additional tests to check the response in case no…

… compression is performed

middleware/compress_test.go

@@ -1,6 +1,7 @@
 package middleware
 
 import (
+	"bytes"
 	"compress/flate"
 	"compress/gzip"
 	"fmt"
@@ -43,7 +44,7 @@ func TestCompressor(t *testing.T) {
 	})
 
 	r.Get("/getplain", func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "text/html")
+		w.Header().Set("Content-Type", "text/plain")
 		w.Write([]byte("textstring"))
 	})
 
@@ -55,18 +56,21 @@ func TestCompressor(t *testing.T) {
 		path              string
 		expectedEncoding  string
 		acceptedEncodings []string
+		checkRawResponse  bool
 	}{
 		{
 			name:              "no expected encodings due to no accepted encodings",
 			path:              "/gethtml",
-			acceptedEncodings: nil,
+			acceptedEncodings: []string{""},
 			expectedEncoding:  "",
+			checkRawResponse:  true,
 		},
 		{
 			name:              "no expected encodings due to content type",
 			path:              "/getplain",
 			acceptedEncodings: nil,
 			expectedEncoding:  "",
+			checkRawResponse:  true,
 		},
 		{
 			name:              "gzip is only encoding",
@@ -92,12 +96,16 @@ func TestCompressor(t *testing.T) {
 			path:              "/getcss",
 			acceptedEncodings: []string{"nop, gzip, deflate"},
 			expectedEncoding:  "nop",
+			checkRawResponse:  true,
 		},
 	}
 
 	for _, tc := range tests {
 		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
+			if tc.checkRawResponse {
+				testRequestRawResponse(t, ts, "GET", tc.path, []byte("textstring"), tc.acceptedEncodings...)
+			}
 			resp, respString := testRequestWithAcceptedEncodings(t, ts, "GET", tc.path, tc.acceptedEncodings...)
 			if respString != "textstring" {
 				t.Errorf("response text doesn't match; expected:%q, got:%q", "textstring", respString)
@@ -171,6 +179,35 @@ func TestCompressorWildcards(t *testing.T) {
 	}
 }
 
+func testRequestRawResponse(t *testing.T, ts *httptest.Server, method, path string, exp []byte, encodings ...string) {
+	req, err := http.NewRequest(method, ts.URL+path, nil)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+	if len(encodings) > 0 {
+		encodingsString := strings.Join(encodings, ",")
+		req.Header.Set("Accept-Encoding", encodingsString)
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	respBody, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+	defer resp.Body.Close()
+
+	if !bytes.Equal(respBody, exp) {
+		t.Errorf("expected %q but got %q", exp, respBody)
+	}
+}
+
 func testRequestWithAcceptedEncodings(t *testing.T, ts *httptest.Server, method, path string, encodings ...string) (*http.Response, string) {
 	req, err := http.NewRequest(method, ts.URL+path, nil)
 	if err != nil {