Fix tests for upcoming matplotlib v2 (#1171)

Author: fmaussion

.travis.yml

@@ -28,6 +28,8 @@ matrix:
     env: CONDA_ENV=py35-dask-dev
   - python: 3.5
     env: CONDA_ENV=py35-pandas-dev
+  - python: 3.5
+    env: CONDA_ENV=py35-condaforge-rc
   allow_failures:
   - python: 2.7
     env: CONDA_ENV=py27-pydap
@@ -42,6 +44,8 @@ matrix:
     env: CONDA_ENV=py35-dask-dev
   - python: 3.5
     env: CONDA_ENV=py35-pandas-dev
+  - python: 3.5
+    env: CONDA_ENV=py35-condaforge-rc
 
 before_install:
   - if [[ "$TRAVIS_PYTHON_VERSION" == "2.7" ]]; then

ci/requirements-py35-condaforge-rc.yml

@@ -0,0 +1,21 @@
+name: test_env
+channels:
+  - conda-forge/label/rc
+  - conda-forge
+dependencies:
+  - python=3.5
+  - cython
+  - dask
+  - distributed
+  - h5py
+  - matplotlib
+  - netcdf4
+  - pytest
+  - numpy
+  - pandas
+  - seaborn
+  - scipy
+  - pip:
+    - coveralls
+    - pytest-cov
+    - h5netcdf

xarray/test/test_plot.py

@@ -161,7 +161,12 @@ def test_subplot_kws(self):
         g = d.plot(x='x', y='y', col='z', col_wrap=2, cmap='cool',
                    subplot_kws=dict(axisbg='r'))
         for ax in g.axes.flat:
-            self.assertEqual(ax.get_axis_bgcolor(), 'r')
+            try:
+                # mpl V2
+                self.assertEqual(ax.get_facecolor()[0:3],
+                                 mpl.colors.to_rgb('r'))
+            except AttributeError:
+                self.assertEqual(ax.get_axis_bgcolor(), 'r')
 
     def test_plot_size(self):
         self.darray[:, 0, 0].plot(figsize=(13, 5))
@@ -1116,7 +1121,7 @@ def test_figure_size(self):
             g = xplt.plot(self.darray, row=2, col='z', ax=plt.gca(), size=6)
 
     def test_num_ticks(self):
-        nticks = 100
+        nticks = 99
         maxticks = nticks + 1
         self.g.map_dataarray(xplt.imshow, 'x', 'y')
         self.g.set_ticks(max_xticks=nticks, max_yticks=nticks)
@@ -1203,5 +1208,3 @@ def test_default_labels(self):
         # Top row should be labeled
         for label, ax in zip(self.darray.coords['col'].values, g.axes[0, :]):
             self.assertTrue(substring_in_axes(label, ax))
-        
-