A rudimentary test case for qidenticon

src/tests/test_identicon.py

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+"""Tests for qidenticon"""
+
+import atexit
+import unittest
+
+try:
+    from PyQt5 import QtGui, QtWidgets
+    from xvfbwrapper import Xvfb
+    from pybitmessage import qidenticon
+except ImportError:
+    Xvfb = None
+    # raise unittest.SkipTest(
+    #     'Skipping graphical test, because of no PyQt or xvfbwrapper')
+else:
+    vdisplay = Xvfb(width=1024, height=768)
+    vdisplay.start()
+    atexit.register(vdisplay.stop)
+
+
+sample_code = 0x3fd4bf901b9d4ea1394f0fb358725b28
+sample_size = 48
+
+
+@unittest.skipUnless(
+    Xvfb, 'Skipping graphical test, because of no PyQt or xvfbwrapper')
+class TestIdenticon(unittest.TestCase):
+    """QIdenticon implementation test case"""
+
+    @classmethod
+    def setUpClass(cls):
+        """Instantiate QtWidgets.QApplication"""
+        cls.app = QtWidgets.QApplication([])
+
+    def test_qidenticon_samples(self):
+        """Generate 4 qidenticon samples and check their properties"""
+        icon_simple = qidenticon.render_identicon(sample_code, sample_size)
+        self.assertIsInstance(icon_simple, QtGui.QPixmap)
+        self.assertEqual(icon_simple.height(), sample_size * 3)
+        self.assertEqual(icon_simple.width(), sample_size * 3)
+        self.assertFalse(icon_simple.hasAlphaChannel())
+
+        # icon_sample = QtGui.QPixmap()
+        # icon_sample.load('../images/qidenticon.png')
+        # self.assertFalse(
+        #     icon_simple.toImage(), icon_sample.toImage())
+
+        icon_x = qidenticon.render_identicon(
+            sample_code, sample_size, opacity=0)
+        self.assertTrue(icon_x.hasAlphaChannel())