Add test to ensure QgsRenderContext created without map settings

has an invalid (default constructed) mapToPixel
qgis · Sep 27, 2021 · fdc3d47 · fdc3d47
1 parent d3792a9
commit fdc3d47
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/tests/src/python/test_qgsrendercontext.py b/tests/src/python/test_qgsrendercontext.py
@@ -67,6 +67,9 @@ def testGettersSetters(self):
         c.setSymbologyReferenceScale(1000)
         self.assertEqual(c.symbologyReferenceScale(), 1000)
 
+        # should have an invalid mapToPixel by default
+        self.assertFalse(c.mapToPixel().isValid())
+
     def testCopyConstructor(self):
         """
         Test the copy constructor
@@ -113,6 +116,9 @@ def testFromQPainter(self):
         self.assertEqual(c.testFlag(QgsRenderContext.LosslessImageRendering), False)
         self.assertAlmostEqual(c.scaleFactor(), 88 / 25.4, 3)
 
+        # should have an invalid mapToPixel by default
+        self.assertFalse(c.mapToPixel().isValid())
+
         im = QImage(1000, 600, QImage.Format_RGB32)
         dots_per_m = 300 / 25.4 * 1000  # 300 dpi to dots per m
         im.setDotsPerMeterX(dots_per_m)
@@ -153,6 +159,9 @@ def testFromMapSettings(self):
         self.assertEqual(ms.zRange(), QgsDoubleRange(1, 10))
         self.assertEqual(rc.symbologyReferenceScale(), -1)
 
+        # should have an valid mapToPixel
+        self.assertTrue(rc.mapToPixel().isValid())
+
         ms.setTextRenderFormat(QgsRenderContext.TextFormatAlwaysOutlines)
         ms.setZRange(QgsDoubleRange())
         rc = QgsRenderContext.fromMapSettings(ms)