Skip tests if matplotlib is not present

skimage/viewer/tests/test_plugins.py

@@ -4,15 +4,21 @@ import skimage
 import skimage.data as data
 from skimage.filter.rank import median
 from skimage.morphology import disk
-from skimage.viewer import ImageViewer
-from skimage.viewer.qt import qt_api
 from numpy.testing import assert_equal, assert_allclose, assert_almost_equal
 from numpy.testing.decorators import skipif
-from skimage.viewer.plugins import (
-    LineProfile, Measure, CannyPlugin, LabelPainter, Crop, ColorHistogram,
-    PlotPlugin)
-from skimage.viewer.plugins.base import Plugin
-from skimage.viewer.widgets import Slider
+
+try:
+    from skimage.viewer.qt import qt_api
+    from skimage.viewer import ImageViewer
+    from skimage.viewer.plugins import (
+        LineProfile, Measure, CannyPlugin, LabelPainter, Crop, ColorHistogram,
+        PlotPlugin)
+    from skimage.viewer.plugins.base import Plugin
+    from skimage.viewer.widgets import Slider
+except ImportError:
+    skip_all = True
+else:
+    skip_all = False
 
 
 def setup_line_profile(image, limits='image'):
@@ -22,7 +28,7 @@ def setup_line_profile(image, limits='image'):
     return plugin
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_line_profile():
     """ Test a line profile using an ndim=2 image"""
     plugin = setup_line_profile(data.camera())
@@ -36,7 +42,7 @@ def test_line_profile():
     assert_allclose(scan_data.mean(), 0.2812, rtol=1e-3)
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_line_profile_rgb():
     """ Test a line profile using an ndim=3 image"""
     plugin = setup_line_profile(data.chelsea(), limits=None)
@@ -51,7 +57,7 @@ def test_line_profile_rgb():
     assert_allclose(scan_data.mean(), 0.4359, rtol=1e-3)
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_line_profile_dynamic():
     """Test a line profile updating after an image transform"""
     image = data.coins()[:-50, :]  # shave some off to make the line lower
@@ -76,7 +82,7 @@ def test_line_profile_dynamic():
     assert_almost_equal(np.max(line) - np.min(line), 0.639, 1)
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_measure():
     image = data.camera()
     viewer = ImageViewer(image)
@@ -88,7 +94,7 @@ def test_measure():
     assert_equal(str(m._angle.text[:5]), '135.0')
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_canny():
     image = data.camera()
     viewer = ImageViewer(image)
@@ -101,7 +107,7 @@ def test_canny():
     assert edges.sum() == 2852
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_label_painter():
     image = data.camera()
     moon = data.moon()
@@ -119,7 +125,7 @@ def test_label_painter():
     assert_equal(lp.paint_tool.shape, moon.shape)
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_crop():
     image = data.camera()
     viewer = ImageViewer(image)
@@ -130,7 +136,7 @@ def test_crop():
     assert_equal(viewer.image.shape, (101, 101))
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_color_histogram():
     image = skimage.img_as_float(data.load('color.png'))
     viewer = ImageViewer(image)
@@ -142,7 +148,7 @@ def test_color_histogram():
     assert_almost_equal(viewer.image.std(), 0.325, 3)
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_plot_plugin():
     viewer = ImageViewer(data.moon())
     plugin = PlotPlugin(image_filter=lambda x: x)
@@ -154,7 +160,7 @@ def test_plot_plugin():
     viewer.close()
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_plugin():
     img = skimage.img_as_float(data.moon())
     viewer = ImageViewer(img)

skimage/viewer/tests/test_tools.py

@@ -2,14 +2,20 @@ from collections import namedtuple
 
 import numpy as np
 from skimage import data
-from skimage.viewer import ImageViewer
-from skimage.viewer.canvastools import (
-    LineTool, ThickLineTool, RectangleTool, PaintTool)
-from skimage.viewer.canvastools.base import CanvasToolBase
-from skimage.viewer.qt import qt_api
 from numpy.testing import assert_equal
 from numpy.testing.decorators import skipif
 
+try:
+    from skimage.viewer.qt import qt_api
+    from skimage.viewer import ImageViewer
+    from skimage.viewer.canvastools import (
+        LineTool, ThickLineTool, RectangleTool, PaintTool)
+    from skimage.viewer.canvastools.base import CanvasToolBase
+except ImportError:
+    skip_all = True
+else:
+    skip_all = False
+
 
 def get_end_points(image):
     h, w = image.shape[0:2]
@@ -70,7 +76,7 @@ def create_mouse_event(ax, button=1, xdata=0, ydata=0, key=None):
     return event
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_line_tool():
     img = data.camera()
     viewer = ImageViewer(img)
@@ -96,7 +102,7 @@ def test_line_tool():
     assert_equal(tool.geometry, np.array([[100, 100], [10, 10]]))
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_thick_line_tool():
     img = data.camera()
     viewer = ImageViewer(img)
@@ -121,7 +127,7 @@ def test_thick_line_tool():
     assert_equal(tool.linewidth, 1)
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_rect_tool():
     img = data.camera()
     viewer = ImageViewer(img)
@@ -153,7 +159,7 @@ def test_rect_tool():
     assert_equal(tool.geometry, [10, 100,  10, 100])
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_paint_tool():
     img = data.moon()
     viewer = ImageViewer(img)
@@ -189,7 +195,7 @@ def test_paint_tool():
     assert_equal(tool.overlay.sum(), 0)
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_base_tool():
     img = data.moon()
     viewer = ImageViewer(img)

skimage/viewer/tests/test_utils.py

@@ -1,8 +1,12 @@
 # -*- coding: utf-8 -*-
-from skimage.viewer.qt import qt_api, QtCore, QtGui
 from numpy.testing.decorators import skipif
-from skimage.viewer import utils
-from skimage.viewer.utils import dialogs
+
+try:
+    from skimage.viewer.qt import qt_api, QtCore, QtGui
+    from skimage.viewer import utils
+    from skimage.viewer.utils import dialogs
+except ImportError:
+    qt_api = None
 
 
 @skipif(qt_api is None)
@@ -13,6 +17,7 @@ def test_event_loop():
     utils.start_qtapp()
 
 
+@skipif(qt_api is None)
 def test_format_filename():
     fname = dialogs._format_filename(('apple', 2))
     assert fname == 'apple'
@@ -20,6 +25,7 @@ def test_format_filename():
     assert fname is None
 
 
+@skipif(qt_api is None)
 def test_open_file_dialog():
     utils.init_qtapp()
     timer = QtCore.QTimer()
@@ -28,6 +34,7 @@ def test_open_file_dialog():
     assert filename is None
 
 
+@skipif(qt_api is None)
 def test_save_file_dialog():
     utils.init_qtapp()
     timer = QtCore.QTimer()

skimage/viewer/tests/test_viewer.py

@@ -1,16 +1,22 @@
 
 from skimage import data
-from skimage.viewer import ImageViewer, CollectionViewer
 from skimage.transform import pyramid_gaussian
-from skimage.viewer.plugins import OverlayPlugin
-from skimage.viewer.plugins.overlayplugin import recent_mpl_version
 from skimage.filter import sobel
-from skimage.viewer.qt import qt_api, QtGui, QtCore
 from numpy.testing import assert_equal
 from numpy.testing.decorators import skipif
 
+try:
+    from skimage.viewer.qt import qt_api, QtGui, QtCore
+    from skimage.viewer.plugins import OverlayPlugin
+    from skimage.viewer.plugins.overlayplugin import recent_mpl_version
+    from skimage.viewer import ImageViewer, CollectionViewer
+except ImportError:
+    skip_all = True
+else:
+    skip_all = False
 
-@skipif(qt_api is None)
+
+@skipif(skip_all or qt_api is None)
 def test_viewer():
     lena = data.lena()
     coins = data.coins()
@@ -37,7 +43,7 @@ def make_key_event(key):
                            QtCore.Qt.NoModifier)
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_collection_viewer():
 
     img = data.lena()
@@ -53,7 +59,7 @@ def test_collection_viewer():
     view._format_coord(10, 10)
 
 
-@skipif(qt_api is None or not recent_mpl_version())
+@skipif(skip_all or qt_api is None or not recent_mpl_version())
 def test_viewer_with_overlay():
     img = data.coins()
     ov = OverlayPlugin(image_filter=sobel)

skimage/viewer/tests/test_widgets.py

@@ -1,15 +1,20 @@
 
 import os
 from skimage import data, img_as_float, io
-from skimage.viewer import ImageViewer
-from skimage.viewer.widgets import (
-    Slider, OKCancelButtons, SaveButtons, ComboBox, Text)
-from skimage.viewer.plugins.base import Plugin
-
-from skimage.viewer.qt import qt_api, QtGui, QtCore
 from numpy.testing import assert_almost_equal, assert_equal
 from numpy.testing.decorators import skipif
 
+try:
+    from skimage.viewer.qt import qt_api, QtGui, QtCore
+    from skimage.viewer import ImageViewer
+    from skimage.viewer.widgets import (
+        Slider, OKCancelButtons, SaveButtons, ComboBox, Text)
+    from skimage.viewer.plugins.base import Plugin
+except ImportError:
+    skip_all = True
+else:
+    skip_all = False
+
 
 def get_image_viewer():
     image = data.coins()
@@ -18,7 +23,7 @@ def get_image_viewer():
     return viewer
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_combo_box():
     viewer = get_image_viewer()
     cb = ComboBox('hello', ('a', 'b', 'c'))
@@ -31,7 +36,7 @@ def test_combo_box():
     assert_equal(cb.index, 2)
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_text_widget():
     viewer = get_image_viewer()
     txt = Text('hello', 'hello, world!')
@@ -42,7 +47,7 @@ def test_text_widget():
     assert_equal(str(txt.text), 'goodbye, world!')
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_slider_int():
     viewer = get_image_viewer()
     sld = Slider('radius', 2, 10, value_type='int')
@@ -56,7 +61,7 @@ def test_slider_int():
     assert_equal(sld.val, 5)
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_slider_float():
     viewer = get_image_viewer()
     sld = Slider('alpha', 2.1, 3.1, value=2.1, value_type='float',
@@ -71,7 +76,7 @@ def test_slider_float():
     assert_almost_equal(sld.val, 2.5, 2)
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_save_buttons():
     viewer = get_image_viewer()
     sv = SaveButtons()
@@ -94,7 +99,7 @@ def test_save_buttons():
     assert_almost_equal(img, viewer.image)
 
 
-@skipif(qt_api is None)
+@skipif(skip_all or qt_api is None)
 def test_ok_buttons():
     viewer = get_image_viewer()
     ok = OKCancelButtons()