Change push-type tests for better coverage (#144)

Author: sideshow

client_test.go

@@ -171,17 +171,14 @@ func TestHeaders(t *testing.T) {
 	n.Topic = "com.testapp"
 	n.Priority = 10
 	n.Expiration = time.Now()
+	n.PushType = apns.PushTypeBackground
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		assert.Equal(t, n.ApnsID, r.Header.Get("apns-id"))
 		assert.Equal(t, n.CollapseID, r.Header.Get("apns-collapse-id"))
 		assert.Equal(t, "10", r.Header.Get("apns-priority"))
 		assert.Equal(t, n.Topic, r.Header.Get("apns-topic"))
 		assert.Equal(t, fmt.Sprintf("%v", n.Expiration.Unix()), r.Header.Get("apns-expiration"))
-		if n.PushType == "" {
-			assert.Equal(t, "alert", r.Header.Get("apns-push-type"))
-		} else {
-			assert.Equal(t, n.PushType, r.Header.Get("apns-push-type"))
-		}
+		assert.Equal(t, "background", r.Header.Get("apns-push-type"))
 	}))
 	defer server.Close()
 	_, err := mockClient(server.URL).Push(n)