Move Python export tests from glue-qt to here

glue/viewers/histogram/tests/test_python_export.py

@@ -0,0 +1,61 @@
+from astropy.utils import NumpyRNGContext
+
+from glue.core import Data, DataCollection
+from glue.core.application_base import Application
+from glue.viewers.histogram.viewer import SimpleHistogramViewer
+from glue.viewers.matplotlib.tests.test_python_export import BaseTestExportPython, random_with_nan
+
+
+class TestExportPython(BaseTestExportPython):
+
+    def setup_method(self, method):
+
+        with NumpyRNGContext(12345):
+            self.data = Data(**dict((name, random_with_nan(100, nan_index=idx + 1)) for idx, name in enumerate('abcdefgh')))
+        self.data_collection = DataCollection([self.data])
+        self.app = Application(self.data_collection)
+        self.viewer = self.app.new_data_viewer(SimpleHistogramViewer)
+        self.viewer.add_data(self.data)
+        self.viewer.state.x_att = self.data.id['a']
+
+    def teardown_method(self, method):
+        self.viewer = None
+        self.app = None
+
+    def test_simple(self, tmpdir):
+        self.assert_same(tmpdir)
+
+    def test_simple_visual(self, tmpdir):
+        self.viewer.state.layers[0].color = 'blue'
+        self.viewer.state.layers[0].alpha = 0.5
+        self.assert_same(tmpdir)
+
+    def test_simple_visual_legend(self, tmpdir):
+        self.viewer.state.legend.visible = True
+        self.viewer.state.layers[0].color = 'blue'
+        self.viewer.state.layers[0].alpha = 0.5
+        self.assert_same(tmpdir)
+
+    def test_cumulative(self, tmpdir):
+        self.viewer.state.cumulative = True
+        self.assert_same(tmpdir)
+
+    def test_normalize(self, tmpdir):
+        self.viewer.state.normalize = True
+        self.assert_same(tmpdir)
+
+    def test_subset(self, tmpdir):
+        self.data_collection.new_subset_group('mysubset', self.data.id['a'] > 0.5)
+        self.assert_same(tmpdir)
+
+    def test_subset_legend(self, tmpdir):
+        self.viewer.state.legend.visible = True
+        self.data_collection.new_subset_group('mysubset', self.data.id['a'] > 0.5)
+        self.assert_same(tmpdir)
+
+    def test_empty(self, tmpdir):
+        self.viewer.state.x_min = 10
+        self.viewer.state.x_max = 11
+        self.viewer.state.hist_x_min = 10
+        self.viewer.state.hist_x_max = 11
+        self.assert_same(tmpdir)

glue/viewers/image/tests/test_python_export.py

@@ -0,0 +1,124 @@
+import pytest
+import numpy as np
+import matplotlib.pyplot as plt
+from astropy.utils import NumpyRNGContext
+from astropy.wcs import WCS
+
+from glue.core import Data, DataCollection
+from glue.core.coordinates import AffineCoordinates
+from glue.core.application_base import Application
+from glue.viewers.image.viewer import SimpleImageViewer
+from glue.viewers.matplotlib.tests.test_python_export import BaseTestExportPython
+
+
+class TestExportPython(BaseTestExportPython):
+
+    def setup_method(self, method):
+
+        with NumpyRNGContext(12345):
+            self.data = Data(cube=np.random.random((30, 50, 20)))
+        # Create data versions with WCS and affine coordinates
+        matrix = np.array([[2, 3, 0, -1], [1, 2, 0, 2], [0, 0, 1, -2], [0, 0, 0, 1]])
+        affine = AffineCoordinates(matrix, units=['Mm', 'Mm', 'km'], labels=['xw', 'yw', 'zw'])
+
+        self.data_wcs = Data(label='cube', cube=self.data['cube'], coords=WCS(naxis=3))
+        self.data_affine = Data(label='cube', cube=self.data['cube'], coords=affine)
+        self.data_collection = DataCollection([self.data, self.data_wcs, self.data_affine])
+        self.app = Application(self.data_collection)
+        self.viewer = self.app.new_data_viewer(SimpleImageViewer)
+        self.viewer.add_data(self.data)
+        # FIXME: On some platforms, using an integer label size
+        # causes some of the labels to be non-deterministically
+        # shifted by one pixel, so we pick a non-round font size
+        # to avoid this.
+        self.viewer.state.x_ticklabel_size = 8.21334111
+        self.viewer.state.y_ticklabel_size = 8.21334111
+
+    def teardown_method(self, method):
+        self.viewer = None
+        self.app = None
+
+    def assert_same(self, tmpdir, tol=0.1):
+        BaseTestExportPython.assert_same(self, tmpdir, tol=tol)
+
+    def viewer_load(self, coords):
+        if coords is not None:
+            self.viewer.add_data(getattr(self, f'data_{coords}'))
+            self.viewer.remove_data(self.data)
+
+    @pytest.mark.parametrize('coords', [None, 'wcs', 'affine'])
+    def test_simple(self, tmpdir, coords):
+        self.viewer_load(coords)
+        self.assert_same(tmpdir)
+
+    @pytest.mark.parametrize('coords', [None, 'wcs', 'affine'])
+    def test_simple_legend(self, tmpdir, coords):
+        self.viewer_load(coords)
+        self.viewer.state.show_legend = True
+        self.assert_same(tmpdir)
+
+    @pytest.mark.parametrize('coords', [None, 'wcs', 'affine'])
+    def test_simple_att(self, tmpdir, coords):
+        self.viewer_load(coords)
+        self.viewer.state.x_att = self.viewer.state.reference_data.pixel_component_ids[1]
+        self.viewer.state.y_att = self.viewer.state.reference_data.pixel_component_ids[0]
+        if coords == 'affine':
+            pytest.xfail('Known issue with axis label rendering')
+        self.assert_same(tmpdir)
+
+    @pytest.mark.parametrize('coords', [None, 'wcs', 'affine'])
+    def test_simple_visual(self, tmpdir, coords):
+        self.viewer_load(coords)
+        self.viewer.state.legend.visible = True
+        self.viewer.state.layers[0].cmap = plt.cm.RdBu
+        self.viewer.state.layers[0].v_min = 0.2
+        self.viewer.state.layers[0].v_max = 0.8
+        self.viewer.state.layers[0].stretch = 'sqrt'
+        self.viewer.state.layers[0].stretch = 'sqrt'
+        self.viewer.state.layers[0].contrast = 0.9
+        self.viewer.state.layers[0].bias = 0.6
+        self.assert_same(tmpdir)
+
+    @pytest.mark.parametrize('coords', [None, 'wcs', 'affine'])
+    def test_slice(self, tmpdir, coords):
+        self.viewer_load(coords)
+        self.viewer.state.x_att = self.viewer.state.reference_data.pixel_component_ids[1]
+        self.viewer.state.y_att = self.viewer.state.reference_data.pixel_component_ids[0]
+        self.viewer.state.slices = (2, 3, 4)
+        if coords == 'affine':
+            pytest.xfail('Known issue with axis label rendering')
+        self.assert_same(tmpdir)
+
+    @pytest.mark.parametrize('coords', [None, 'wcs', 'affine'])
+    def test_aspect(self, tmpdir, coords):
+        self.viewer_load(coords)
+        self.viewer.state.aspect = 'auto'
+        self.assert_same(tmpdir)
+
+    @pytest.mark.parametrize('coords', [None, 'wcs', 'affine'])
+    def test_subset(self, tmpdir, coords):
+        self.viewer_load(coords)
+        self.data_collection.new_subset_group('mysubset', self.data.id['cube'] > 0.5)
+        self.assert_same(tmpdir)
+
+    @pytest.mark.parametrize('coords', [None, 'wcs', 'affine'])
+    def test_subset_legend(self, tmpdir, coords):
+        self.viewer_load(coords)
+        self.data_collection.new_subset_group('mysubset',
+                                              self.viewer.state.reference_data.id['cube'] > 0.5)
+        self.viewer.state.legend.visible = True
+        self.assert_same(tmpdir, tol=0.15)  # transparency and such
+
+    @pytest.mark.parametrize('coords', [None, 'wcs', 'affine'])
+    def test_subset_slice(self, tmpdir, coords):
+        self.viewer_load(coords)
+        self.data_collection.new_subset_group('mysubset', self.data.id['cube'] > 0.5)
+        self.test_slice(tmpdir, coords)
+
+    @pytest.mark.parametrize('coords', [None, 'wcs', 'affine'])
+    def test_subset_transposed(self, tmpdir, coords):
+        self.viewer_load(coords)
+        self.data_collection.new_subset_group('mysubset', self.data.id['cube'] > 0.5)
+        self.viewer.state.x_att = self.data.pixel_component_ids[0]
+        self.viewer.state.y_att = self.data.pixel_component_ids[1]
+        self.assert_same(tmpdir)

glue/viewers/matplotlib/tests/test_python_export.py

@@ -0,0 +1,62 @@
+import os
+import sys
+import pytest
+import subprocess
+
+from glue.config import settings
+
+import numpy as np
+
+from matplotlib.testing.compare import compare_images
+
+__all__ = ['random_with_nan', 'BaseTestExportPython']
+
+
+def random_with_nan(nsamples, nan_index):
+    x = np.random.random(nsamples)
+    x[nan_index] = np.nan
+    return x
+
+
+class BaseTestExportPython:
+
+    def assert_same(self, tmpdir, tol=0.1):
+
+        os.chdir(tmpdir.strpath)
+
+        expected = tmpdir.join('expected.png').strpath
+        script = tmpdir.join('actual.py').strpath
+        actual = tmpdir.join('glue_plot.png').strpath
+
+        self.viewer.axes.figure.savefig(expected)
+
+        self.viewer.export_as_script(script)
+        subprocess.call([sys.executable, script])
+
+        msg = compare_images(expected, actual, tol=tol)
+
+        if msg:
+
+            from base64 import b64encode
+
+            print("SCRIPT:")
+            with open(script, 'r') as f:
+                print(f.read())
+
+            print("EXPECTED:")
+            with open(expected, 'rb') as f:
+                print(b64encode(f.read()).decode())
+
+            print("ACTUAL:")
+            with open(actual, 'rb') as f:
+                print(b64encode(f.read()).decode())
+
+            pytest.fail(msg, pytrace=False)
+
+    def test_color_settings(self, tmpdir):
+        settings.FOREGROUND_COLOR = '#a51d2d'
+        settings.BACKGROUND_COLOR = '#99c1f1'
+        self.viewer._update_appearance_from_settings()
+        self.assert_same(tmpdir)
+        settings.reset_defaults()
+        self.viewer._update_appearance_from_settings()

glue/viewers/profile/tests/test_python_export.py

@@ -0,0 +1,87 @@
+from astropy.utils import NumpyRNGContext
+
+from glue.core import Data, DataCollection
+from glue.core.application_base import Application
+from glue.viewers.profile.viewer import SimpleProfileViewer
+from glue.viewers.matplotlib.tests.test_python_export import BaseTestExportPython, random_with_nan
+from glue.viewers.profile.tests.test_state import SimpleCoordinates
+
+
+class TestExportPython(BaseTestExportPython):
+
+    def setup_method(self, method):
+
+        self.data = Data(label='d1')
+        self.data.coords = SimpleCoordinates()
+        with NumpyRNGContext(12345):
+            self.data['x'] = random_with_nan(48, 5).reshape((6, 4, 2))
+            self.data['y'] = random_with_nan(48, 12).reshape((6, 4, 2))
+        self.data_collection = DataCollection([self.data])
+        self.app = Application(self.data_collection)
+        self.viewer = self.app.new_data_viewer(SimpleProfileViewer)
+        self.viewer.add_data(self.data)
+        # Make legend location deterministic
+        self.viewer.state.legend.location = 'lower left'
+
+    def teardown_method(self, method):
+        self.viewer = None
+        self.app = None
+
+    def test_simple(self, tmpdir):
+        self.assert_same(tmpdir)
+
+    def test_simple_legend(self, tmpdir):
+        self.viewer.state.legend.visible = True
+        self.assert_same(tmpdir)
+
+    def test_color(self, tmpdir):
+        self.viewer.state.layers[0].color = '#ac0567'
+        self.assert_same(tmpdir)
+
+    def test_linewidth(self, tmpdir):
+        self.viewer.state.layers[0].linewidth = 7.25
+        self.assert_same(tmpdir)
+
+    def test_max(self, tmpdir):
+        self.viewer.state.function = 'maximum'
+        self.assert_same(tmpdir)
+
+    def test_min(self, tmpdir):
+        self.viewer.state.function = 'minimum'
+        self.assert_same(tmpdir)
+
+    def test_mean(self, tmpdir):
+        self.viewer.state.function = 'mean'
+        self.assert_same(tmpdir)
+
+    def test_median(self, tmpdir):
+        self.viewer.state.function = 'median'
+        self.assert_same(tmpdir)
+
+    def test_sum(self, tmpdir):
+        self.viewer.state.function = 'sum'
+        self.assert_same(tmpdir)
+
+    def test_normalization(self, tmpdir):
+        self.viewer.state.normalize = True
+        self.assert_same(tmpdir)
+
+    def test_subset(self, tmpdir):
+        self.viewer.state.function = 'mean'
+        self.data_collection.new_subset_group('mysubset', self.data.id['x'] > 0.25)
+        self.assert_same(tmpdir)
+
+    def test_subset_legend(self, tmpdir):
+        self.viewer.state.legend.visible = True
+        self.viewer.state.function = 'mean'
+        self.viewer.state.layers[0].linewidth = 7.25
+        self.data_collection.new_subset_group('mysubset', self.data.id['x'] > 0.25)
+        self.assert_same(tmpdir)
+
+    def test_xatt(self, tmpdir):
+        self.viewer.x_att = self.data.pixel_component_ids[1]
+        self.assert_same(tmpdir)
+
+    def test_profile_att(self, tmpdir):
+        self.viewer.layers[0].state.attribute = self.data.id['y']
+        self.assert_same(tmpdir)