A Google AppEngine test server to facilitate chromeproxy Telemetry tests.

tools/perf/chromeproxy_testserver/server_test.go

Index: tools/perf/chromeproxy_testserver/server_test.go
diff --git a/tools/perf/chromeproxy_testserver/server_test.go b/tools/perf/chromeproxy_testserver/server_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..d215131194a231d3233c647a1f8e01b4c910913c
--- /dev/null
+++ b/tools/perf/chromeproxy_testserver/server_test.go
@@ -0,0 +1,99 @@
+package server
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"reflect"
+	"strconv"
+	"testing"
+)
+
+func composeQuery(path string, code int, headers http.Header, body []byte) (string, error) {
+	u, err := url.Parse(path)
+	if err != nil {
+		return "", err
+	}
+	q := u.Query()
+	if code > 0 {
+		q.Set("respStatus", strconv.Itoa(code))
+	}
+	if headers != nil {
+		h, err := json.Marshal(headers)
+		if err != nil {
+			return "", err
+		}
+		q.Set("respHeader", base64.URLEncoding.EncodeToString(h))
+	}
+	if len(body) > 0 {
+		q.Set("respBody", base64.URLEncoding.EncodeToString(body))
+	}
+	u.RawQuery = q.Encode()
+	return u.String(), nil
+}
+
+func TestResponseOverride(t *testing.T) {
+	tests := []struct {
+		name    string
+		code    int
+		headers http.Header
+		body    []byte
+	}{
+		{name: "code", code: 204},
+		{name: "body", body: []byte("new body")},
+		{
+			name: "headers",
+			headers: http.Header{
+				"Via":          []string{"Via1", "Via2"},
+				"Content-Type": []string{"random content"},
+			},
+		},
+		{
+			name: "everything",
+			code: 204,
+			body: []byte("new body"),
+			headers: http.Header{
+				"Via":          []string{"Via1", "Via2"},
+				"Content-Type": []string{"random content"},
+			},
+		},
+	}
+
+	for _, test := range tests {
+		u, err := composeQuery("http://test.com/override", test.code, test.headers, test.body)
+		if err != nil {
+			t.Errorf("%s: composeQuery: %v", test.name, err)
+			return
+		}
+		req, err := http.NewRequest("GET", u, nil)
+		if err != nil {
+			t.Errorf("%s: http.NewRequest: %v", test.name, err)
+			return
+		}
+		w := httptest.NewRecorder()
+		defaultResponse(w, req)
+		if test.code > 0 {
+			if got, want := w.Code, test.code; got != want {
+				t.Errorf("%s: response code: got %d want %d", test.name, got, want)
+				return
+			}
+		}
+		if test.headers != nil {
+			for k, want := range test.headers {
+				got, ok := w.HeaderMap[k]
+				if !ok || !reflect.DeepEqual(got, want) {
+					t.Errorf("%s: header %s: code: got %v want %v", test.name, k, got, want)
+					return
+				}
+			}
+		}
+		if test.body != nil {
+			if got, want := string(w.Body.Bytes()), string(test.body); got != want {
+				t.Errorf("%s: body: got %s want %s", test.name, got, want)
+				return
+			}
+		}
+	}
+}