tests: Move tod context creation into test-utils-tod library

tests/test-utils-tod.c

@@ -0,0 +1,52 @@
+/*
+ * Unit tests for libfprint
+ * Copyright (C) 2020 Marco Trevisan <marco.trevisan@canonical.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <libfprint/fprint.h>
+
+#include "test-utils-tod.h"
+
+FptContext *
+fpt_context_new_with_fake_dev (void)
+{
+  FptContext *tctx;
+  GPtrArray *devices;
+  unsigned int i;
+
+  tctx = fpt_context_new ();
+  devices = fp_context_get_devices (tctx->fp_context);
+
+  g_assert_nonnull (devices);
+  g_assert_cmpuint (devices->len, ==, 1);
+
+  for (i = 0; i < devices->len; ++i)
+    {
+      FpDevice *device = devices->pdata[i];
+
+      if (g_strcmp0 (fp_device_get_driver (device), "fake_test_dev") == 0)
+        {
+          tctx->device = device;
+          break;
+        }
+    }
+
+  g_assert_true (FP_IS_DEVICE (tctx->device));
+  g_object_add_weak_pointer (G_OBJECT (tctx->device), (gpointer) & tctx->device);
+
+  return tctx;
+}