fix(exp): allow request path matching in the want function (#475)

If the `Request.Path` value is not set, this allows the path matching to
happen in the `Request.Want` function.

We sometimes have random values in the URL that require more advanced
paths matching.

hcloud/exp/mockutils/mockutils.go

@@ -43,10 +43,14 @@ func Handler(t *testing.T, requests []Request) http.HandlerFunc {
 		}
 
 		expected := requests[index]
-		require.Equal(t,
-			expected.Method+" "+expected.Path,
-			r.Method+" "+r.RequestURI,
-		)
+
+		expectedCall := expected.Method
+		foundCall := r.Method
+		if expected.Path != "" {
+			expectedCall += " " + expected.Path
+			foundCall += " " + r.RequestURI
+		}
+		require.Equal(t, expectedCall, foundCall)
 
 		if expected.Want != nil {
 			expected.Want(t, r)

hcloud/exp/mockutils/mockutils_test.go

@@ -1,7 +1,9 @@
 package mockutils
 
 import (
+	"fmt"
 	"io"
+	"math/rand"
 	"net/http"
 	"net/http/httptest"
 	"strings"
@@ -31,6 +33,13 @@ func TestHandler(t *testing.T) {
 			Method: "GET", Path: "/",
 			Status: 503,
 		},
+		{
+			Method: "GET",
+			Want: func(t *testing.T, r *http.Request) {
+				require.True(t, strings.HasPrefix(r.RequestURI, "/random?key="))
+			},
+			Status: 200,
+		},
 	}))
 	defer server.Close()
 
@@ -54,6 +63,13 @@ func TestHandler(t *testing.T) {
 	assert.Equal(t, 503, resp.StatusCode)
 	assert.Equal(t, "", resp.Header.Get("Content-Type"))
 	assert.Equal(t, "", readBody(t, resp))
+
+	// Request 4
+	resp, err = http.Get(fmt.Sprintf("%s/random?key=%d", server.URL, rand.Int63()))
+	require.NoError(t, err)
+	assert.Equal(t, 200, resp.StatusCode)
+	assert.Equal(t, "", resp.Header.Get("Content-Type"))
+	assert.Equal(t, "", readBody(t, resp))
 }
 
 func readBody(t *testing.T, resp *http.Response) string {