context: Factorize duplicated code

If we fail when setting the scanned image to a print, we'll have a fatal
error, in such case we can terminate the current action and deactivate the
device.

doc/libfprint-sections.txt

@@ -207,6 +207,8 @@ fpi_print_set_type
 fpi_print_set_device_stored
 fpi_print_add_from_image
 fpi_print_bz3_match
+fpi_print_generate_user_id
+fpi_print_fill_from_user_id
 </SECTION>
 
 <SECTION>

examples/enroll.c

@@ -1,6 +1,6 @@
 /*
  * Example fingerprint enrollment program
- * Enrolls your choosen finger and saves the print to disk
+ * Enrolls your chosen finger and saves the print to disk
  * Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
  * Copyright (C) 2019 Marco Trevisan <marco.trevisan@canonical.com>
  *

libfprint/drivers/elan.c

@@ -733,7 +733,7 @@ calibrate_run_state (FpiSsm *ssm, FpDevice *dev)
           fp_dbg ("calibration failed");
           fpi_ssm_mark_failed (ssm,
                                fpi_device_error_new_msg (FP_DEVICE_ERROR_GENERAL,
-                                                         "Callibration failed!"));
+                                                         "Calibration failed!"));
         }
       break;
 

libfprint/drivers/etes603.c

@@ -859,13 +859,15 @@ m_capture_state (FpiSsm *ssm, FpDevice *dev)
         }
       else
         {
-          FpImage *img;
-          unsigned int img_size;
           /* Remove empty parts 2 times for the 2 frames */
           process_removefpi_end (self);
           process_removefpi_end (self);
-          img_size = self->fp_height * FE_WIDTH;
+
-          img = fp_image_new (FE_WIDTH, self->fp_height);
+          if (self->fp_height >= FE_WIDTH)
+            {
+              FpImage *img = fp_image_new (FE_WIDTH, self->fp_height);
+              unsigned int img_size = self->fp_height * FE_WIDTH;
+
               /* Images received are white on black, so invert it. */
               /* TODO detect sweep direction */
               img->flags = FPI_IMAGE_COLORS_INVERTED | FPI_IMAGE_V_FLIPPED;
@@ -874,6 +876,12 @@ m_capture_state (FpiSsm *ssm, FpDevice *dev)
               fp_dbg ("Sending the raw fingerprint image (%dx%d)",
                       img->width, img->height);
               fpi_image_device_image_captured (idev, img);
+            }
+          else
+            {
+              fpi_image_device_retry_scan (idev, FP_DEVICE_RETRY_TOO_SHORT);
+            }
+
           fpi_image_device_report_finger_status (idev, FALSE);
           fpi_ssm_mark_completed (ssm);
         }

libfprint/drivers/synaptics/bmkt_response.h

@@ -316,7 +316,7 @@ typedef struct bmkt_init_resp
  */
 typedef struct bmkt_enroll_resp
 {
-  int     progress;                             /**< Shows current progress stutus [0-100] */
+  int     progress;                             /**< Shows current progress status [0-100] */
   uint8_t finger_id;                            /**< User's finger id [1-10] */
   uint8_t user_id[BMKT_MAX_USER_ID_LEN];        /**< User name to be enrolled */
 } bmkt_enroll_resp_t;

libfprint/drivers/synaptics/synaptics.c

@@ -35,7 +35,7 @@ static const FpIdEntry id_table[] = {
 
 
 static void
-cmd_recieve_cb (FpiUsbTransfer *transfer,
+cmd_receive_cb (FpiUsbTransfer *transfer,
                 FpDevice       *device,
                 gpointer        user_data,
                 GError         *error)
@@ -234,7 +234,7 @@ synaptics_cmd_run_state (FpiSsm   *ssm,
       fpi_usb_transfer_submit (transfer,
                                5000,
                                NULL,
-                               cmd_recieve_cb,
+                               cmd_receive_cb,
                                fpi_ssm_get_data (ssm));
 
       break;
@@ -321,7 +321,7 @@ synaptics_sensor_cmd (FpiDeviceSynaptics *self,
   g_assert (payload || payload_len == 0);
 
   /* seq_num of 0 means a normal command, -1 means the current commands
-   * sequence number should not be udpated (i.e. second async command which
+   * sequence number should not be updated (i.e. second async command which
    * may only be a cancellation currently). */
   if (seq_num <= 0)
     {
@@ -515,39 +515,7 @@ list_msg_cb (FpiDeviceSynaptics *self,
           g_object_set (print, "fpi-data", data, NULL);
           g_object_set (print, "description", get_enroll_templates_resp->templates[n].user_id, NULL);
 
-          /* The format has 24 bytes at the start and some dashes in the right places */
+          fpi_print_fill_from_user_id (print, userid);
-          if (g_str_has_prefix (userid, "FP1-") && strlen (userid) >= 24 &&
-              userid[12] == '-' && userid[14] == '-' && userid[23] == '-')
-            {
-              g_autofree gchar *copy = g_strdup (userid);
-              g_autoptr(GDate) date = NULL;
-              gint32 date_ymd;
-              gint32 finger;
-              gchar *username;
-              /* Try to parse information from the string. */
-
-              copy[12] = '\0';
-              date_ymd = g_ascii_strtod (copy + 4, NULL);
-              if (date_ymd > 0)
-                date = g_date_new_dmy (date_ymd % 100,
-                                       (date_ymd / 100) % 100,
-                                       date_ymd / 10000);
-              else
-                date = g_date_new ();
-
-              fp_print_set_enroll_date (print, date);
-
-              copy[14] = '\0';
-              finger = g_ascii_strtoll (copy + 13, NULL, 16);
-              fp_print_set_finger (print, finger);
-
-              /* We ignore the next chunk, it is just random data.
-               * Then comes the username; nobody is the default if the metadata
-               * is unknown */
-              username = copy + 24;
-              if (strlen (username) > 0 && g_strcmp0 (username, "nobody") != 0)
-                fp_print_set_username (print, username);
-            }
 
           g_ptr_array_add (self->list_result, g_object_ref_sink (print));
         }
@@ -635,7 +603,7 @@ verify_msg_cb (FpiDeviceSynaptics *self,
       else if (resp->result == BMKT_FP_NO_MATCH)
         {
           fp_info ("Print didn't match");
-          fpi_device_verify_report (device, FPI_MATCH_FAIL, NULL, error);
+          fpi_device_verify_report (device, FPI_MATCH_FAIL, NULL, NULL);
           verify_complete_after_finger_removal (self);
         }
       else if (resp->result == BMKT_FP_DATABASE_NO_RECORD_EXISTS)
@@ -730,7 +698,7 @@ enroll_msg_cb (FpiDeviceSynaptics *self,
         if (enroll_resp->progress < 100)
           done_stages = MIN (done_stages, ENROLL_SAMPLES - 1);
 
-        /* Emit a retry error if there has been no discernable
+        /* Emit a retry error if there has been no discernible
          * progress. Some firmware revisions report more required
          * touches. */
         if (self->enroll_stage == done_stages)
@@ -795,8 +763,6 @@ enroll_msg_cb (FpiDeviceSynaptics *self,
     }
 }
 
-#define TEMPLATE_ID_SIZE 20
-
 static void
 enroll (FpDevice *device)
 {
@@ -804,52 +770,21 @@ enroll (FpDevice *device)
   FpPrint *print = NULL;
   GVariant *data = NULL;
   GVariant *uid = NULL;
-  const gchar *username;
   guint finger;
   g_autofree gchar *user_id = NULL;
   gssize user_id_len;
   g_autofree guint8 *payload = NULL;
-  const GDate *date;
-  gint y, m, d;
-  gint32 rand_id = 0;
 
   fpi_device_get_enroll_data (device, &print);
 
   G_DEBUG_HERE ();
 
-  date = fp_print_get_enroll_date (print);
+  user_id = fpi_print_generate_user_id (print);
-  if (date && g_date_valid (date))
-    {
-      y = g_date_get_year (date);
-      m = g_date_get_month (date);
-      d = g_date_get_day (date);
-    }
-  else
-    {
-      y = 0;
-      m = 0;
-      d = 0;
-    }
-
-  username = fp_print_get_username (print);
-  if (!username)
-    username = "nobody";
-
-  if (g_strcmp0 (g_getenv ("FP_DEVICE_EMULATION"), "1") == 0)
-    rand_id = 0;
-  else
-    rand_id = g_random_int ();
-
-  user_id = g_strdup_printf ("FP1-%04d%02d%02d-%X-%08X-%s",
-                             y, m, d,
-                             fp_print_get_finger (print),
-                             rand_id,
-                             username);
 
   user_id_len = strlen (user_id);
   user_id_len = MIN (BMKT_MAX_USER_ID_LEN, user_id_len);
 
-  /* We currently always use finger 1 from the devices piont of view */
+  /* We currently always use finger 1 from the devices point of view */
   finger = 1;
 
   uid = g_variant_new_fixed_array (G_VARIANT_TYPE_BYTE,
@@ -1029,7 +964,7 @@ dev_probe (FpDevice *device)
 
   if (!read_ok)
     {
-      g_warning ("Transfer in response to verison query was too short");
+      g_warning ("Transfer in response to version query was too short");
       error = fpi_device_error_new (FP_DEVICE_ERROR_PROTO);
       goto err_close;
     }

libfprint/drivers/upekts.c

@@ -1119,7 +1119,6 @@ e_handle_resp02 (FpDevice *dev, unsigned char *data,
   else
     {
       GVariant *fp_data;
-      print = fp_print_new (dev);
 
       fpi_device_get_enroll_data (dev, &print);
 

libfprint/drivers/virtual-image.c

@@ -21,7 +21,7 @@
 /*
  * This is a virtual driver to debug the image based drivers. A small
  * python script is provided to connect to it via a socket, allowing
- * prints to be sent to this device programatically.
+ * prints to be sent to this device programmatically.
  * Using this it is possible to test libfprint and fprintd.
  */
 

libfprint/fp-context.c

@@ -94,22 +94,21 @@ async_device_init_done_cb (GObject *source_object, GAsyncResult *res, gpointer u
   FpContext *context;
   FpContextPrivate *priv;
 
-  device = (FpDevice *) g_async_initable_new_finish (G_ASYNC_INITABLE (source_object), res, &error);
+  device = FP_DEVICE (g_async_initable_new_finish (G_ASYNC_INITABLE (source_object),
-  if (!device)
+                                                   res, &error));
-    {
   if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
     return;
 
   context = FP_CONTEXT (user_data);
   priv = fp_context_get_instance_private (context);
   priv->pending_devices--;
+
+  if (error)
+    {
       g_message ("Ignoring device due to initialization error: %s", error->message);
       return;
     }
 
-  context = FP_CONTEXT (user_data);
-  priv = fp_context_get_instance_private (context);
-  priv->pending_devices--;
   g_ptr_array_add (priv->devices, device);
   g_signal_emit (context, signals[DEVICE_ADDED_SIGNAL], 0, device);
 }

libfprint/fp-device.c

@@ -28,7 +28,7 @@
  * @title: Internal FpDevice
  * @short_description: Internal device routines
  *
- * The methods that are availabe for drivers to manipulate a device. See
+ * The methods that are available for drivers to manipulate a device. See
  * #FpDeviceClass for more information. Also note that most of these are
  * not relevant for image based devices, see #FpImageDeviceClass in that
  * case.
@@ -339,7 +339,7 @@ fp_device_class_init (FpDeviceClass *klass)
   properties[PROP_OPEN] =
     g_param_spec_boolean ("open",
                           "Opened",
-                          "Wether the device is open or not", FALSE,
+                          "Whether the device is open or not", FALSE,
                           G_PARAM_STATIC_STRINGS | G_PARAM_READABLE);
 
   /**

libfprint/fp-device.h

@@ -79,7 +79,7 @@ typedef enum {
 
 /**
  * FpDeviceError:
- * @FP_DEVICE_ERROR_GENERAL: A general error occured.
+ * @FP_DEVICE_ERROR_GENERAL: A general error occurred.
  * @FP_DEVICE_ERROR_NOT_SUPPORTED: The device does not support the requested
  *  operation.
  * @FP_DEVICE_ERROR_NOT_OPEN: The device needs to be opened to start this
@@ -113,7 +113,7 @@ GQuark fp_device_error_quark (void);
  * FpEnrollProgress:
  * @device: a #FpDevice
  * @completed_stages: Number of completed stages
- * @print: (nullable) (transfer none): The last scaned print
+ * @print: (nullable) (transfer none): The last scanned print
  * @user_data: (nullable) (transfer none): User provided data
  * @error: (nullable) (transfer none): #GError or %NULL
  *

libfprint/fp-image-device.c

@@ -100,7 +100,7 @@ fp_image_device_close (FpDevice *device)
    *  1. We are inactive
    *     -> immediately close
    *  2. We are waiting for finger off
-   *     -> imediately deactivate
+   *     -> immediately deactivate
    *  3. We are deactivating
    *     -> handled by deactivate_complete */
 

libfprint/fp-image.c

@@ -184,10 +184,8 @@ fp_image_detect_minutiae_cb (GObject      *source_object,
   GTask *task = G_TASK (res);
   FpImage *image;
   DetectMinutiaeData *data = g_task_get_task_data (task);
-  GCancellable *cancellable;
 
-  cancellable = g_task_get_cancellable (task);
+  if (!g_task_had_error (task))
-  if (!cancellable || !g_cancellable_is_cancelled (cancellable))
     {
       gint i;
       image = FP_IMAGE (source_object);
@@ -316,6 +314,14 @@ fp_image_detect_minutiae_thread_func (GTask        *task,
       return;
     }
 
+  if (!data->minutiae || data->minutiae->num == 0)
+    {
+      g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED,
+                               "No minutiae found");
+      g_object_unref (task);
+      return;
+    }
+
   g_task_return_boolean (task, TRUE);
   g_object_unref (task);
 }

libfprint/fp-print.c

@@ -51,7 +51,7 @@ enum {
   PROP_IMAGE,
 
   /* The following is metadata that is stored by default for each print.
-   * Drivers may make use of these during enrollment (e.g. to additionaly store
+   * Drivers may make use of these during enrollment (e.g. to additionally store
    * the metadata on the device). */
   PROP_FINGER,
   PROP_USERNAME,
@@ -588,7 +588,7 @@ fp_print_equal (FpPrint *self, FpPrint *other)
     }
   else if (self->type == FPI_PRINT_NBIS)
     {
-      gint i;
+      guint i;
 
       if (self->prints->len != other->prints->len)
         return FALSE;
@@ -661,7 +661,7 @@ fp_print_serialize (FpPrint *print,
   if (print->type == FPI_PRINT_NBIS)
     {
       GVariantBuilder nested = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("(a(aiaiai))"));
-      gint i;
+      guint i;
 
       g_variant_builder_open (&nested, G_VARIANT_TYPE ("a(aiaiai)"));
       for (i = 0; i < print->prints->len; i++)
@@ -812,7 +812,7 @@ fp_print_deserialize (const guchar *data,
   if (type == FPI_PRINT_NBIS)
     {
       g_autoptr(GVariant) prints = g_variant_get_child_value (print_data, 0);
-      gint i;
+      guint i;
 
       result = g_object_new (FP_TYPE_PRINT,
                              "driver", driver,

libfprint/fpi-device.c

@@ -28,7 +28,7 @@
  * @title: Internal FpDevice
  * @short_description: Internal device routines
  *
- * The methods that are availabe for drivers to manipulate a device. See
+ * The methods that are available for drivers to manipulate a device. See
  * #FpDeviceClass for more information. Also note that most of these are
  * not relevant for image based devices, see #FpImageDeviceClass in that
  * case.
@@ -100,7 +100,7 @@ fpi_device_error_new (FpDeviceError error)
   switch (error)
     {
     case FP_DEVICE_ERROR_GENERAL:
-      msg = "An unspecified error occured!";
+      msg = "An unspecified error occurred!";
       break;
 
     case FP_DEVICE_ERROR_NOT_SUPPORTED:
@@ -138,7 +138,7 @@ fpi_device_error_new (FpDeviceError error)
     default:
       g_warning ("Unsupported error, returning general error instead!");
       error = FP_DEVICE_ERROR_GENERAL;
-      msg = "An unspecified error occured!";
+      msg = "An unspecified error occurred!";
     }
 
   return g_error_new_literal (FP_DEVICE_ERROR, error, msg);

libfprint/fpi-device.h

@@ -65,10 +65,10 @@ struct _FpIdEntry
  * @probe: Called immediately for all devices. Most drivers will not need to
  *   implement this. Drivers should setup the device identifier from the probe
  *   callback which will be used to verify the compatibility of stored
- *   #FpPrint's. It is permissable to temporarily open the USB device if this
+ *   #FpPrint's. It is permissible to temporarily open the USB device if this
  *   is required for the operation. If an error is returned, then the device
  *   will be destroyed again immediately and never reported to the API user.
- * @open: Open the device for futher operations. Any of the normal actions are
+ * @open: Open the device for further operations. Any of the normal actions are
  *   guaranteed to only happen when the device is open (this includes delete).
  * @close: Close the device again
  * @enroll: Start an enroll operation

libfprint/fpi-image-device.c

@@ -171,7 +171,16 @@ fpi_image_device_minutiae_detected (GObject *source_object, GAsyncResult *res, g
       print = fp_print_new (device);
       fpi_print_set_type (print, FPI_PRINT_NBIS);
       if (!fpi_print_add_from_image (print, image, &error))
+        {
           g_clear_object (&print);
+
+          if (error->domain != FP_DEVICE_RETRY)
+            {
+              fpi_device_action_error (device, error);
+              fpi_image_device_deactivate (self);
+              return;
+            }
+        }
     }
 
   if (action == FPI_DEVICE_ACTION_ENROLL)

libfprint/fpi-print.c

@@ -247,3 +247,115 @@ fpi_print_bz3_match (FpPrint *template, FpPrint *print, gint bz3_threshold, GErr
 
   return FPI_MATCH_FAIL;
 }
+
+/**
+ * fpi_print_generate_user_id:
+ * @print: #FpPrint to generate the ID for
+ *
+ * Generates a string identifier for the represented print. This identifier
+ * encodes some metadata about the print. It also includes a random string
+ * and may be assumed to be unique.
+ *
+ * This is useful if devices are able to store a string identifier, but more
+ * storing more metadata may be desirable. In effect, this means the driver
+ * can provide somewhat more meaningful data to fp_device_list_prints().
+ *
+ * The generated ID may be truncated after 23 characters. However, more space
+ * is required to include the username, and it is recommended to store at
+ * at least 31 bytes.
+ *
+ * The generated format may change in the future. It is versioned though and
+ * decoding should remain functional.
+ *
+ * Returns: A unique string of 23 + strlen(username) characters
+ */
+gchar *
+fpi_print_generate_user_id (FpPrint *print)
+{
+  const gchar *username = NULL;
+  gchar *user_id = NULL;
+  const GDate *date;
+  gint y = 0, m = 0, d = 0;
+  gint32 rand_id = 0;
+
+  g_assert (print);
+  date = fp_print_get_enroll_date (print);
+  if (date && g_date_valid (date))
+    {
+      y = g_date_get_year (date);
+      m = g_date_get_month (date);
+      d = g_date_get_day (date);
+    }
+
+  username = fp_print_get_username (print);
+  if (!username)
+    username = "nobody";
+
+  if (g_strcmp0 (g_getenv ("FP_DEVICE_EMULATION"), "1") == 0)
+    rand_id = 0;
+  else
+    rand_id = g_random_int ();
+
+  user_id = g_strdup_printf ("FP1-%04d%02d%02d-%X-%08X-%s",
+                             y, m, d,
+                             fp_print_get_finger (print),
+                             rand_id,
+                             username);
+
+  return user_id;
+
+}
+
+/**
+ * fpi_print_fill_from_user_id:
+ * @print: #FpPrint to fill metadata into
+ * @user_id: An ID that was likely encoded using fpi_print_generate_user_id()
+ *
+ * This is the reverse operation of fpi_print_generate_user_id(), allowing
+ * the driver to encode some print metadata in a string.
+ *
+ * Returns: Whether a valid ID was found
+ */
+gboolean
+fpi_print_fill_from_user_id (FpPrint *print, const char *user_id)
+{
+  g_return_val_if_fail (user_id, FALSE);
+
+  /* The format has 24 bytes at the start and some dashes in the right places */
+  if (g_str_has_prefix (user_id, "FP1-") && strlen (user_id) >= 24 &&
+      user_id[12] == '-' && user_id[14] == '-' && user_id[23] == '-')
+    {
+      g_autofree gchar *copy = g_strdup (user_id);
+      g_autoptr(GDate) date = NULL;
+      gint32 date_ymd;
+      gint32 finger;
+      gchar *username;
+      /* Try to parse information from the string. */
+
+      copy[12] = '\0';
+      date_ymd = g_ascii_strtod (copy + 4, NULL);
+      if (date_ymd > 0)
+        date = g_date_new_dmy (date_ymd % 100,
+                               (date_ymd / 100) % 100,
+                               date_ymd / 10000);
+      else
+        date = g_date_new ();
+
+      fp_print_set_enroll_date (print, date);
+
+      copy[14] = '\0';
+      finger = g_ascii_strtoll (copy + 13, NULL, 16);
+      fp_print_set_finger (print, finger);
+
+      /* We ignore the next chunk, it is just random data.
+       * Then comes the username; nobody is the default if the metadata
+       * is unknown */
+      username = copy + 24;
+      if (strlen (username) > 0 && g_strcmp0 (username, "nobody") != 0)
+        fp_print_set_username (print, username);
+
+      return TRUE;
+    }
+
+  return FALSE;
+}

libfprint/fpi-print.h

@@ -20,7 +20,7 @@ typedef enum {
 
 /**
  * FpiMatchResult:
- * @FPI_MATCH_ERROR: An error occured during matching
+ * @FPI_MATCH_ERROR: An error occurred during matching
  * @FPI_MATCH_FAIL: The prints did not match
  * @FPI_MATCH_SUCCESS: The prints matched
  */
@@ -47,4 +47,9 @@ FpiMatchResult fpi_print_bz3_match (FpPrint * template,
                                     gint bz3_threshold,
                                     GError **error);
 
+/* Helpers to encode metadata into user ID strings. */
+gchar *  fpi_print_generate_user_id (FpPrint *print);
+gboolean fpi_print_fill_from_user_id (FpPrint    *print,
+                                      const char *user_id);
+
 G_END_DECLS

libfprint/fpi-usb-transfer.c

@@ -366,7 +366,7 @@ transfer_finish_cb (GObject *source_object, GAsyncResult *res, gpointer user_dat
  *
  * Note that #FpiUsbTransfer will be stolen when this function is called.
  * So that all associated data will be free'ed automatically, after the
- * callback ran unless fpi_usb_transfer_ref() is explictly called.
+ * callback ran unless fpi_usb_transfer_ref() is explicitly called.
  */
 void
 fpi_usb_transfer_submit (FpiUsbTransfer        *transfer,

libfprint/fpi-usb-transfer.h

@@ -61,7 +61,7 @@ typedef enum  {
  * @length: The requested length of the transfer in bytes.
  * @actual_length: The actual length of the transfer
  *  (see also fpi_usb_transfer_set_short_error())
- * @buffer: The transfered data.
+ * @buffer: The transferred data.
  *
  * Helper for handling USB transfers.
  */

libfprint/fprint-list-supported-devices.c

@@ -2,7 +2,7 @@
  * Copyright (C) 2009 Red Hat <mjg@redhat.com>
  * Copyright (C) 2008 Bastien Nocera <hadess@hadess.net>
  * Copyright (C) 2008 Timo Hoenig <thoenig@suse.de>, <thoenig@nouse.net>
- * Coypright (C) 2019 Benjamin Berg <bberg@redhat.com>
+ * Copyright (C) 2019 Benjamin Berg <bberg@redhat.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public

libfprint/fprint-list-udev-rules.c

@@ -2,7 +2,7 @@
  * Copyright (C) 2009 Red Hat <mjg@redhat.com>
  * Copyright (C) 2008 Bastien Nocera <hadess@hadess.net>
  * Copyright (C) 2008 Timo Hoenig <thoenig@suse.de>, <thoenig@nouse.net>
- * Coypright (C) 2019 Benjamin Berg <bberg@redhat.com>
+ * Copyright (C) 2019 Benjamin Berg <bberg@redhat.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public

tests/test-fpi-device.c

@@ -959,7 +959,7 @@ test_driver_verify_complete_retry (void)
 
   g_test_assert_expected_messages ();
   g_assert_true (error != g_steal_pointer (&fake_dev->ret_error));
-  g_assert_true (error != g_steal_pointer (&fake_dev->user_data));
+  g_steal_pointer (&fake_dev->user_data);
   g_assert_error (error, FP_DEVICE_ERROR, FP_DEVICE_ERROR_GENERAL);
   g_assert_true (match_data->called);
   g_assert_error (match_data->error, FP_DEVICE_RETRY, FP_DEVICE_RETRY_TOO_SHORT);
@@ -981,7 +981,7 @@ test_driver_verify_complete_retry (void)
   g_test_assert_expected_messages ();
 
   g_assert_true (error != g_steal_pointer (&fake_dev->ret_error));
-  g_assert_true (error != g_steal_pointer (&fake_dev->user_data));
+  g_steal_pointer (&fake_dev->user_data);
   g_assert_error (error, FP_DEVICE_ERROR, FP_DEVICE_ERROR_GENERAL);
   g_assert_true (match_data->called);
   g_assert_error (match_data->error, FP_DEVICE_RETRY, FP_DEVICE_RETRY_TOO_SHORT);
@@ -1001,7 +1001,7 @@ test_driver_verify_complete_retry (void)
   g_test_assert_expected_messages ();
 
   g_assert_true (error != g_steal_pointer (&fake_dev->ret_error));
-  g_assert_true (error != g_steal_pointer (&fake_dev->user_data));
+  g_steal_pointer (&fake_dev->user_data);
   g_assert_error (error, FP_DEVICE_RETRY, FP_DEVICE_RETRY_GENERAL);
   g_assert_true (match_data->called);
   g_assert_error (match_data->error, FP_DEVICE_RETRY, FP_DEVICE_RETRY_GENERAL);
@@ -1296,7 +1296,7 @@ test_driver_identify_complete_retry (void)
   g_test_assert_expected_messages ();
 
   g_assert_true (error != g_steal_pointer (&fake_dev->ret_error));
-  g_assert_true (error != g_steal_pointer (&fake_dev->user_data));
+  g_steal_pointer (&fake_dev->user_data);
   g_assert_error (error, FP_DEVICE_ERROR, FP_DEVICE_ERROR_GENERAL);
   g_assert_true (match_data->called);
   g_assert_error (match_data->error, FP_DEVICE_RETRY, FP_DEVICE_RETRY_TOO_SHORT);

tests/virtual-image.py

@@ -3,11 +3,10 @@
 import sys
 try:
     import gi
-    gi.require_version('FPrint', '2.0')
-    from gi.repository import FPrint, GLib, Gio
-
     import os
-    import sys
+
+    from gi.repository import GLib, Gio
+
     import unittest
     import socket
     import struct
@@ -20,6 +19,8 @@ except Exception as e:
     print("Missing dependencies: %s" % str(e))
     sys.exit(77)
 
+FPrint = None
+
 # Re-run the test with the passed wrapper if set
 wrapper = os.getenv('LIBFPRINT_TEST_WRAPPER')
 if wrapper:
@@ -101,12 +102,14 @@ class VirtualImage(unittest.TestCase):
         del self.con
         self.dev.close_sync()
 
-    def send_retry(self, retry_error=FPrint.DeviceRetry.TOO_SHORT, iterate=True):
+    def send_retry(self, retry_error=None, iterate=True):
+        retry_error = retry_error if retry_error else FPrint.DeviceRetry.TOO_SHORT
         self.con.sendall(struct.pack('ii', -1, retry_error))
         while iterate and ctx.pending():
             ctx.iteration(False)
 
-    def send_error(self, device_error=FPrint.DeviceError.GENERAL, iterate=True):
+    def send_error(self, device_error=None, iterate=True):
+        device_error = device_error if device_error else FPrint.DeviceError.GENERAL
         self.con.sendall(struct.pack('ii', -2, device_error))
         while iterate and ctx.pending():
             ctx.iteration(False)
@@ -346,5 +349,12 @@ class VirtualImage(unittest.TestCase):
         assert(not self._verify_match)
 
 if __name__ == '__main__':
+    try:
+        gi.require_version('FPrint', '2.0')
+        from gi.repository import FPrint
+    except Exception as e:
+        print("Missing dependencies: %s" % str(e))
+        sys.exit(77)
+
     # avoid writing to stderr
     unittest.main(testRunner=unittest.TextTestRunner(stream=sys.stdout, verbosity=2))