add test to ensure scale lock is respected on canvas resize

3nids · nyalldawson · commit a98e7a141a5a · 2018-06-11T12:40:26.000+10:00
diff --git a/tests/src/gui/testqgsmapcanvas.cpp b/tests/src/gui/testqgsmapcanvas.cpp
@@ -54,6 +54,7 @@ class TestQgsMapCanvas : public QObject
     void testMagnification();
     void testMagnificationExtent();
     void testMagnificationScale();
+    void testScaleLockCanvasResize();
     void testZoomByWheel();
     void testShiftZoom();
 
@@ -300,6 +301,27 @@ void TestQgsMapCanvas::testMagnificationScale()
   QCOMPARE( initialScale, mCanvas->scale() );
 }
 
+void TestQgsMapCanvas::testScaleLockCanvasResize()
+{
+  mCanvas->resize( 600, 400 );
+  QCOMPARE( mCanvas->width(), 600 );
+  QCOMPARE( mCanvas->height(), 400 );
+
+  mCanvas->setMagnificationFactor( 2.0 );
+  double initialScale = mCanvas->scale();
+  mCanvas->setScaleLocked( true );
+
+  mCanvas->resize( 300, 200 );
+  QCOMPARE( mCanvas->width(), 300 );
+  QCOMPARE( mCanvas->height(), 200 );
+
+  QCOMPARE( mCanvas->magnificationFactor(), 2.0 );
+  QCOMPARE( mCanvas->scale(), initialScale );
+
+  mCanvas->setScaleLocked( false );
+  mCanvas->setMagnificationFactor( 1.0 );
+}
+
 void TestQgsMapCanvas::testZoomByWheel()
 {
   mCanvas->setExtent( QgsRectangle( 0, 0, 10, 10 ) );
