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Catch known Matplotlib warnings

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`tight_layout` is not supported on all backends, so Matplotlib may raise a
warning, saying it is falling back to the Agg backend.  Since we use the
'Template' backend in our tests, this warning pops up from time to time.
This commit is contained in:
Stefan van der Walt
2016-03-02 18:54:14 -08:00
parent 0d7289ea76
commit 9e9207c718
1 changed files with 19 additions and 7 deletions
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skimage/io/tests/test_mpl_imshow.py
+19 -7
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@@ -43,7 +43,9 @@ def n_subplots(ax_im):
def test_uint8():
plt.figure()
ax_im = io.imshow(im8)
with expected_warnings(["tight_layout : Falling back to Agg|\A\Z",
"CObject type is marked|\A\Z"]):
ax_im = io.imshow(im8)
assert ax_im.cmap.name == 'gray'
assert ax_im.get_clim() == (0, 255)
assert n_subplots(ax_im) == 1
@@ -52,7 +54,9 @@ def test_uint8():
def test_uint16():
plt.figure()
ax_im = io.imshow(im16)
with expected_warnings(["tight_layout : Falling back to Agg|\A\Z",
"CObject type is marked|\A\Z"]):
ax_im = io.imshow(im16)
assert ax_im.cmap.name == 'gray'
assert ax_im.get_clim() == (0, 65535)
assert n_subplots(ax_im) == 1
@@ -61,7 +65,9 @@ def test_uint16():
def test_float():
plt.figure()
ax_im = io.imshow(imf)
with expected_warnings(["tight_layout : Falling back to Agg|\A\Z",
"CObject type is marked|\A\Z"]):
ax_im = io.imshow(imf)
assert ax_im.cmap.name == 'gray'
assert ax_im.get_clim() == (0, 1)
assert n_subplots(ax_im) == 1
@@ -69,7 +75,8 @@ def test_float():
def test_low_dynamic_range():
with expected_warnings(["Low image dynamic range"]):
with expected_warnings(["Low image dynamic range|CObject type is marked",
"tight_layout : Falling back to Agg|\A\Z"]):
ax_im = io.imshow(im_lo)
assert ax_im.get_clim() == (im_lo.min(), im_lo.max())
# check that a colorbar was created
@@ -82,7 +89,8 @@ def test_outside_standard_range():
# "The CObject type is marked Pending Deprecation in Python 2.7.
# Please use capsule objects instead."
# Ref: https://docs.python.org/2/c-api/cobject.html
with expected_warnings(["out of standard range|CObject type is marked"]):
with expected_warnings(["out of standard range|CObject type is marked",
"tight_layout : Falling back to Agg|\A\Z"]):
ax_im = io.imshow(im_hi)
assert ax_im.get_clim() == (im_hi.min(), im_hi.max())
assert n_subplots(ax_im) == 2
@@ -95,7 +103,8 @@ def test_nonstandard_type():
# "The CObject type is marked Pending Deprecation in Python 2.7.
# Please use capsule objects instead."
# Ref: https://docs.python.org/2/c-api/cobject.html
with expected_warnings(["Low image dynamic range|CObject type is marked"]):
with expected_warnings(["Low image dynamic range|CObject type is marked",
"tight_layout : Falling back to Agg|\A\Z"]):
ax_im = io.imshow(im64)
assert ax_im.get_clim() == (im64.min(), im64.max())
assert n_subplots(ax_im) == 2
@@ -105,7 +114,10 @@ def test_nonstandard_type():
def test_signed_image():
plt.figure()
im_signed = np.array([[-0.5, -0.2], [0.1, 0.4]])
ax_im = io.imshow(im_signed)
with expected_warnings(["tight_layout : Falling back to Agg|\A\Z",
"CObject type is marked|\A\Z"]):
ax_im = io.imshow(im_signed)
assert ax_im.get_clim() == (-0.5, 0.5)
assert n_subplots(ax_im) == 2
assert ax_im.colorbar is not None