tests: Add basic unit tests for fp-context

Link the tests with the private library using an utils library that will
be useful to share other tests functions

meson.build

@@ -199,10 +199,7 @@ if get_option('gtk-examples')
     subdir('demo')
 endif
 
-# The tests require introspeciton support to run
-if get_option('introspection')
-    subdir('tests')
-endif
+subdir('tests')
 
 pkgconfig = import('pkgconfig')
 pkgconfig.generate(

tests/meson.build

@@ -48,6 +48,32 @@ if get_option('introspection')
     endforeach
 endif
 
+if 'virtual_image' in drivers
+    test_utils = static_library('fprint-test-utils',
+        sources: ['test-utils.c'],
+        dependencies: libfprint_private_dep,
+        install: false)
+
+    unit_tests = [
+        'fp-context',
+    ]
+
+    foreach test_name: unit_tests
+        basename = 'test-' + test_name
+        test_exe = executable(basename,
+            sources: basename + '.c',
+            dependencies: libfprint_private_dep,
+            c_args: common_cflags,
+            link_with: test_utils)
+        test(test_name,
+            find_program('test-runner.sh'),
+            suite: ['unit-tests'],
+            args: [test_exe],
+            env: envs,
+        )
+    endforeach
+endif
+
 gdb = find_program('gdb', required: false)
 if gdb.found()
     add_test_setup('gdb',

tests/test-fp-context.c

@@ -0,0 +1,106 @@
+/*
+ * FpContext Unit tests
+ * Copyright (C) 2019 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.h"
+
+static void
+test_context_new (void)
+{
+  g_autoptr(FpContext) context = fp_context_new ();
+  g_assert_true (FP_CONTEXT (context));
+}
+
+static void
+test_context_has_no_devices (void)
+{
+  g_autoptr(FpContext) context = NULL;
+  GPtrArray *devices;
+
+  context = fp_context_new ();
+  devices = fp_context_get_devices (context);
+
+  g_assert_nonnull (devices);
+  g_assert_cmpuint (devices->len, ==, 0);
+}
+
+static void
+test_context_has_virtual_device (void)
+{
+  g_autoptr(FpContext) context = NULL;
+  FpDevice *virtual_device = NULL;
+  GPtrArray *devices;
+  unsigned int i;
+
+  fpt_setup_virtual_device_environment ();
+
+  context = fp_context_new ();
+  devices = fp_context_get_devices (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), "virtual_image") == 0)
+        {
+          virtual_device = device;
+          break;
+        }
+    }
+
+  g_assert_true (FP_IS_DEVICE (virtual_device));
+
+  fpt_teardown_virtual_device_environment ();
+}
+
+static void
+test_context_enumerates_new_devices (void)
+{
+  g_autoptr(FpContext) context = NULL;
+  GPtrArray *devices;
+
+  context = fp_context_new ();
+
+  fpt_setup_virtual_device_environment ();
+
+  fp_context_enumerate (context);
+  devices = fp_context_get_devices (context);
+
+  g_assert_nonnull (devices);
+  g_assert_cmpuint (devices->len, ==, 1);
+
+  fpt_teardown_virtual_device_environment ();
+}
+
+int
+main (int argc, char *argv[])
+{
+  g_test_init (&argc, &argv, NULL);
+
+  g_test_add_func ("/context/new", test_context_new);
+  g_test_add_func ("/context/no-devices", test_context_has_no_devices);
+  g_test_add_func ("/context/has-virtual-device", test_context_has_virtual_device);
+  g_test_add_func ("/context/enumerates-new-devices", test_context_enumerates_new_devices);
+
+  return g_test_run ();
+}

tests/test-runner.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+exec $LIBFPRINT_TEST_WRAPPER $@

tests/test-utils.c

@@ -0,0 +1,66 @@
+/*
+ * Unit tests for libfprint
+ * Copyright (C) 2019 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 <glib/gstdio.h>
+
+#include "test-utils.h"
+
+void
+fpt_teardown_virtual_device_environment (void)
+{
+  const char *path = g_getenv ("FP_VIRTUAL_IMAGE");
+
+  if (path)
+    {
+      g_autofree char *temp_dir = g_path_get_dirname (path);
+
+      g_unsetenv ("FP_VIRTUAL_IMAGE");
+      g_unlink (path);
+      g_rmdir (temp_dir);
+    }
+}
+
+static void
+on_signal_event (int sig)
+{
+  fpt_teardown_virtual_device_environment ();
+}
+
+void
+fpt_setup_virtual_device_environment (void)
+{
+  g_autoptr(GError) error = NULL;
+  g_autofree char *temp_dir = NULL;
+  g_autofree char *temp_path = NULL;
+
+  g_assert_null (g_getenv ("FP_VIRTUAL_IMAGE"));
+
+  temp_dir = g_dir_make_tmp ("libfprint-XXXXXX", &error);
+  g_assert_no_error (error);
+
+  temp_path = g_build_filename (temp_dir, "virtual-image.socket", NULL);
+  g_setenv ("FP_VIRTUAL_IMAGE", temp_path, TRUE);
+
+  signal (SIGKILL, on_signal_event);
+  signal (SIGABRT, on_signal_event);
+  signal (SIGSEGV, on_signal_event);
+  signal (SIGTERM, on_signal_event);
+  signal (SIGQUIT, on_signal_event);
+  signal (SIGPIPE, on_signal_event);
+}

tests/test-utils.h

@@ -0,0 +1,23 @@
+/*
+ * Unit tests for libfprint
+ * Copyright (C) 2019 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 <glib.h>
+
+void fpt_setup_virtual_device_environment (void);
+void fpt_teardown_virtual_device_environment (void);