Merge pull request #28 from astrofrog/enable-tests

Make tests.py into proper unit test, and add Qt version info to pytest header

.travis.yml

@@ -64,8 +64,9 @@ install:
       conda create -q -n test-environment python=$TRAVIS_PYTHON_VERSION qt pyside;
     fi
   - source activate test-environment
+  - conda install -q pytest
   - python setup.py install
 before_script:
   - cd tests
 script:
-  - python tests.py
+  - py.test

tests/conftest.py

@@ -0,0 +1,59 @@
+import os
+
+
+def pytest_configure(config):
+    """
+    This function gets run by py.test at the very start
+    """
+
+    if 'USE_QT_API' in os.environ:
+        os.environ['QT_API'] = os.environ['USE_QT_API'].lower()
+
+    # We need to import qtpy here to make sure that the API versions get set
+    # straight away.
+    import qtpy
+
+
+def pytest_report_header(config):
+    """
+    This function is used by py.test to insert a customized header into the
+    test report.
+    """
+
+    versions = os.linesep
+    versions += 'PyQt4: '
+
+    try:
+        from PyQt4 import Qt
+        versions += "PyQt: {0} - Qt: {1}".format(Qt.PYQT_VERSION_STR, Qt.QT_VERSION_STR)
+    except ImportError:
+        versions += 'not installed'
+    except AttributeError:
+        versions += 'unknown version'
+
+    versions += os.linesep
+    versions += 'PyQt5: '
+
+    try:
+        from PyQt5 import Qt
+        versions += "PyQt: {0} - Qt: {1}".format(Qt.PYQT_VERSION_STR, Qt.QT_VERSION_STR)
+    except ImportError:
+        versions += 'not installed'
+    except AttributeError:
+        versions += 'unknown version'
+
+    versions += os.linesep
+    versions += 'PySide: '
+
+    try:
+        import PySide
+        from PySide import QtCore
+        versions += "PySide: {0} - Qt: {1}".format(PySide.__version__, QtCore.__version__)
+    except ImportError:
+        versions += 'not installed'
+    except AttributeError:
+        versions += 'unknown version'
+
+    versions += os.linesep
+
+    return versions

tests/test_main.py

@@ -0,0 +1,68 @@
+import os
+
+from qtpy import QtCore, QtGui, QtWidgets, QtWebEngineWidgets
+
+
+def assert_pyside():
+    """
+    Make sure that we are using PySide
+    """
+    import PySide
+    assert QtCore.QEvent is PySide.QtCore.QEvent
+    assert QtGui.QPainter is PySide.QtGui.QPainter
+    assert QtWidgets.QWidget is PySide.QtGui.QWidget
+    assert QtWebEngineWidgets.QWebEnginePage is PySide.QtWebKit.QWebPage
+
+
+def assert_pyqt4():
+    """
+    Make sure that we are using PyQt4
+    """
+    import PyQt4
+    assert QtCore.QEvent is PyQt4.QtCore.QEvent
+    assert QtGui.QPainter is PyQt4.QtGui.QPainter
+    assert QtWidgets.QWidget is PyQt4.QtGui.QWidget
+    assert QtWebEngineWidgets.QWebEnginePage is PyQt4.QtWebKit.QWebPage
+
+
+def assert_pyqt5():
+    """
+    Make sure that we are using PyQt5
+    """
+    import PyQt5
+    assert QtCore.QEvent is PyQt5.QtCore.QEvent
+    assert QtGui.QPainter is PyQt5.QtGui.QPainter
+    assert QtWidgets.QWidget is PyQt5.QtWidgets.QWidget
+    assert QtWebEngineWidgets.QWebEnginePage is PyQt5.QtWebKitWidgets.QWebPage
+
+
+def test_qt_api():
+    """
+    If QT_API is specified, we check that the correct Qt wrapper was used
+    """
+
+    QT_API = os.environ.get('QT_API')
+
+    if QT_API == 'pyside':
+        assert_pyside()
+    elif QT_API in ('pyqt', 'pyqt4'):
+        assert_pyqt4()
+    elif QT_API == 'pyqt5':
+        assert_pyqt5()
+    else:
+        # If the tests are run locally, USE_QT_API and QT_API may not be
+        # defined, but we still want to make sure qtpy is behaving sensibly.
+        # We should then be loading, in order of decreasing preference, PyQt5,
+        # PyQt4, and PySide.
+        try:
+            import PyQt5
+        except ImportError:
+            try:
+                import PyQt4
+            except ImportError:
+                import PySide
+                assert_pyside()
+            else:
+                assert_pyqt4()
+        else:
+            assert_pyqt5()