Python matplotlib.testing() Examples

The following are 24 code examples for showing how to use matplotlib.testing(). These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example.

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Example 1
Project: GraphicDesignPatternByPython   Author: Relph1119   File: decorators.py    License: MIT License 6 votes vote down vote up
def switch_backend(backend):

    def switch_backend_decorator(func):

        @functools.wraps(func)
        def backend_switcher(*args, **kwargs):
            try:
                prev_backend = mpl.get_backend()
                matplotlib.testing.setup()
                plt.switch_backend(backend)
                return func(*args, **kwargs)
            finally:
                plt.switch_backend(prev_backend)

        return backend_switcher

    return switch_backend_decorator 
Example 2
Project: python3_ios   Author: holzschu   File: decorators.py    License: BSD 3-Clause "New" or "Revised" License 6 votes vote down vote up
def switch_backend(backend):

    def switch_backend_decorator(func):

        @functools.wraps(func)
        def backend_switcher(*args, **kwargs):
            try:
                prev_backend = mpl.get_backend()
                matplotlib.testing.setup()
                plt.switch_backend(backend)
                return func(*args, **kwargs)
            finally:
                plt.switch_backend(prev_backend)

        return backend_switcher

    return switch_backend_decorator 
Example 3
Project: coffeegrindsize   Author: jgagneastro   File: decorators.py    License: MIT License 6 votes vote down vote up
def switch_backend(backend):

    def switch_backend_decorator(func):

        @functools.wraps(func)
        def backend_switcher(*args, **kwargs):
            try:
                prev_backend = mpl.get_backend()
                matplotlib.testing.setup()
                plt.switch_backend(backend)
                return func(*args, **kwargs)
            finally:
                plt.switch_backend(prev_backend)

        return backend_switcher

    return switch_backend_decorator 
Example 4
Project: CogAlg   Author: boris-kz   File: decorators.py    License: MIT License 6 votes vote down vote up
def switch_backend(backend):

    def switch_backend_decorator(func):

        @functools.wraps(func)
        def backend_switcher(*args, **kwargs):
            try:
                prev_backend = mpl.get_backend()
                matplotlib.testing.setup()
                plt.switch_backend(backend)
                return func(*args, **kwargs)
            finally:
                plt.switch_backend(prev_backend)

        return backend_switcher

    return switch_backend_decorator 
Example 5
Project: twitter-stock-recommendation   Author: alvarobartt   File: decorators.py    License: MIT License 6 votes vote down vote up
def switch_backend(backend):
    # Local import to avoid a hard nose dependency and only incur the
    # import time overhead at actual test-time.
    def switch_backend_decorator(func):
        @functools.wraps(func)
        def backend_switcher(*args, **kwargs):
            try:
                prev_backend = mpl.get_backend()
                matplotlib.testing.setup()
                plt.switch_backend(backend)
                result = func(*args, **kwargs)
            finally:
                plt.switch_backend(prev_backend)
            return result

        return _copy_metadata(func, backend_switcher)
    return switch_backend_decorator 
Example 6
Project: GraphicDesignPatternByPython   Author: Relph1119   File: decorators.py    License: MIT License 5 votes vote down vote up
def setup(self):
        func = self.func
        plt.close('all')
        self.setup_class()
        try:
            matplotlib.style.use(self.style)
            matplotlib.testing.set_font_settings_for_testing()
            func()
            assert len(plt.get_fignums()) == len(self.baseline_images), (
                "Test generated {} images but there are {} baseline images"
                .format(len(plt.get_fignums()), len(self.baseline_images)))
        except:
            # Restore original settings before raising errors.
            self.teardown_class()
            raise 
Example 7
Project: GraphicDesignPatternByPython   Author: Relph1119   File: decorators.py    License: MIT License 5 votes vote down vote up
def _image_directories(func):
    """
    Compute the baseline and result image directories for testing *func*.

    For test module ``foo.bar.test_baz``, the baseline directory is at
    ``foo/bar/baseline_images/test_baz`` and the result directory at
    ``$(pwd)/result_images/test_baz``.  The result directory is created if it
    doesn't exist.
    """
    module_path = Path(sys.modules[func.__module__].__file__)
    baseline_dir = module_path.parent / "baseline_images" / module_path.stem
    result_dir = Path().resolve() / "result_images" / module_path.stem
    result_dir.mkdir(parents=True, exist_ok=True)
    return str(baseline_dir), str(result_dir) 
Example 8
Project: python3_ios   Author: holzschu   File: decorators.py    License: BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up
def setup(self):
        func = self.func
        plt.close('all')
        self.setup_class()
        try:
            matplotlib.style.use(self.style)
            matplotlib.testing.set_font_settings_for_testing()
            func()
            assert len(plt.get_fignums()) == len(self.baseline_images), (
                "Test generated {} images but there are {} baseline images"
                .format(len(plt.get_fignums()), len(self.baseline_images)))
        except:
            # Restore original settings before raising errors.
            self.teardown_class()
            raise 
Example 9
Project: python3_ios   Author: holzschu   File: decorators.py    License: BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up
def _image_directories(func):
    """
    Compute the baseline and result image directories for testing *func*.

    For test module ``foo.bar.test_baz``, the baseline directory is at
    ``foo/bar/baseline_images/test_baz`` and the result directory at
    ``$(pwd)/result_images/test_baz``.  The result directory is created if it
    doesn't exist.
    """
    module_path = Path(sys.modules[func.__module__].__file__)
    baseline_dir = module_path.parent / "baseline_images" / module_path.stem
    result_dir = Path().resolve() / "result_images" / module_path.stem
    result_dir.mkdir(parents=True, exist_ok=True)
    return str(baseline_dir), str(result_dir) 
Example 10
Project: msaf   Author: urinieto   File: mpl_ic.py    License: MIT License 5 votes vote down vote up
def knownfailureif(fail_condition, msg=None, known_exception_class=None ):
    """

    Assume a will fail if *fail_condition* is True. *fail_condition*
    may also be False or the string 'indeterminate'.

    *msg* is the error message displayed for the test.

    If *known_exception_class* is not None, the failure is only known
    if the exception is an instance of this class. (Default = None)

    """
    # based on numpy.testing.dec.knownfailureif
    if msg is None:
        msg = 'Test known to fail'
    def known_fail_decorator(f):
        # Local import to avoid a hard nose dependency and only incur the
        # import time overhead at actual test-time.
        import nose
        def failer(*args, **kwargs):
            try:
                # Always run the test (to generate images).
                result = f(*args, **kwargs)
            except Exception as err:
                if fail_condition:
                    if known_exception_class is not None:
                        if not isinstance(err,known_exception_class):
                            # This is not the expected exception
                            raise
                    # (Keep the next ultra-long comment so in shows in console.)
                    raise KnownFailure(msg) # An error here when running nose means that you don't have the matplotlib.testing.noseclasses:KnownFailure plugin in use.
                else:
                    raise
            if fail_condition and fail_condition != 'indeterminate':
                raise KnownFailureDidNotFailTest(msg)
            return result
        return nose.tools.make_decorator(f)(failer)
    return known_fail_decorator 
Example 11
Project: msaf   Author: urinieto   File: mpl_ic.py    License: MIT License 5 votes vote down vote up
def _do_cleanup(original_units_registry):
    plt.close('all')
    gc.collect()

    import matplotlib.testing
    matplotlib.testing.setup()

    matplotlib.units.registry.clear()
    matplotlib.units.registry.update(original_units_registry)
    warnings.resetwarnings()  # reset any warning filters set in tests 
Example 12
Project: msaf   Author: urinieto   File: mpl_ic.py    License: MIT License 5 votes vote down vote up
def _image_directories(func):
    """
    Compute the baseline and result image directories for testing *func*.
    Create the result directory if it doesn't exist.
    """
    module_name = func.__module__
#     mods = module_name.split('.')
#     mods.pop(0) # <- will be the name of the package being tested (in
                # most cases "matplotlib")
#     assert mods.pop(0) == 'tests'
#     subdir = os.path.join(*mods)
    subdir = module_name

    import imp
    def find_dotted_module(module_name, path=None):
        """A version of imp which can handle dots in the module name"""
        res = None
        for sub_mod in module_name.split('.'):
            try:
                res = file, path, _ = imp.find_module(sub_mod, path)
                path = [path]
                if file is not None:
                    file.close()
            except ImportError:
                # assume namespace package
                path = sys.modules[sub_mod].__path__
                res = None, path, None
        return res

    mod_file = find_dotted_module(func.__module__)[1]
    basedir = os.path.dirname(mod_file)

    baseline_dir = os.path.join(basedir, 'baseline_images', subdir)
    result_dir = os.path.abspath(os.path.join('result_images', subdir))

    if not os.path.exists(result_dir):
        cbook.mkdirs(result_dir)

    return baseline_dir, result_dir 
Example 13
Project: coffeegrindsize   Author: jgagneastro   File: decorators.py    License: MIT License 5 votes vote down vote up
def setup(self):
        func = self.func
        plt.close('all')
        self.setup_class()
        try:
            matplotlib.style.use(self.style)
            matplotlib.testing.set_font_settings_for_testing()
            func()
            assert len(plt.get_fignums()) == len(self.baseline_images), (
                "Test generated {} images but there are {} baseline images"
                .format(len(plt.get_fignums()), len(self.baseline_images)))
        except:
            # Restore original settings before raising errors.
            self.teardown_class()
            raise 
Example 14
Project: coffeegrindsize   Author: jgagneastro   File: decorators.py    License: MIT License 5 votes vote down vote up
def _image_directories(func):
    """
    Compute the baseline and result image directories for testing *func*.

    For test module ``foo.bar.test_baz``, the baseline directory is at
    ``foo/bar/baseline_images/test_baz`` and the result directory at
    ``$(pwd)/result_images/test_baz``.  The result directory is created if it
    doesn't exist.
    """
    module_path = Path(sys.modules[func.__module__].__file__)
    baseline_dir = module_path.parent / "baseline_images" / module_path.stem
    result_dir = Path().resolve() / "result_images" / module_path.stem
    result_dir.mkdir(parents=True, exist_ok=True)
    return str(baseline_dir), str(result_dir) 
Example 15
Project: CogAlg   Author: boris-kz   File: decorators.py    License: MIT License 5 votes vote down vote up
def setup(self):
        func = self.func
        plt.close('all')
        self.setup_class()
        try:
            matplotlib.style.use(self.style)
            matplotlib.testing.set_font_settings_for_testing()
            func()
            assert len(plt.get_fignums()) == len(self.baseline_images), (
                "Test generated {} images but there are {} baseline images"
                .format(len(plt.get_fignums()), len(self.baseline_images)))
        except:
            # Restore original settings before raising errors.
            self.teardown_class()
            raise 
Example 16
Project: CogAlg   Author: boris-kz   File: decorators.py    License: MIT License 5 votes vote down vote up
def _image_directories(func):
    """
    Compute the baseline and result image directories for testing *func*.

    For test module ``foo.bar.test_baz``, the baseline directory is at
    ``foo/bar/baseline_images/test_baz`` and the result directory at
    ``$(pwd)/result_images/test_baz``.  The result directory is created if it
    doesn't exist.
    """
    module_path = Path(sys.modules[func.__module__].__file__)
    baseline_dir = module_path.parent / "baseline_images" / module_path.stem
    result_dir = Path().resolve() / "result_images" / module_path.stem
    result_dir.mkdir(parents=True, exist_ok=True)
    return str(baseline_dir), str(result_dir) 
Example 17
Project: twitter-stock-recommendation   Author: alvarobartt   File: decorators.py    License: MIT License 5 votes vote down vote up
def setup_class(cls):
        cls.original_units_registry = matplotlib.units.registry.copy()
        cls.original_settings = mpl.rcParams.copy()
        matplotlib.testing.setup() 
Example 18
Project: twitter-stock-recommendation   Author: alvarobartt   File: decorators.py    License: MIT License 5 votes vote down vote up
def setup(self):
        func = self.func
        plt.close('all')
        self.setup_class()
        try:
            matplotlib.style.use(self.style)
            matplotlib.testing.set_font_settings_for_testing()
            func()
            assert len(plt.get_fignums()) == len(self.baseline_images), (
                "Test generated {} images but there are {} baseline images"
                .format(len(plt.get_fignums()), len(self.baseline_images)))
        except:
            # Restore original settings before raising errors.
            self.teardown_class()
            raise 
Example 19
Project: GraphicDesignPatternByPython   Author: Relph1119   File: decorators.py    License: MIT License 4 votes vote down vote up
def _pytest_image_comparison(baseline_images, extensions, tol,
                             freetype_version, remove_text, savefig_kwargs,
                             style):
    """
    Decorate function with image comparison for pytest.

    This function creates a decorator that wraps a figure-generating function
    with image comparison code. Pytest can become confused if we change the
    signature of the function, so we indirectly pass anything we need via the
    `mpl_image_comparison_parameters` fixture and extra markers.
    """
    import pytest

    extensions = map(_mark_xfail_if_format_is_uncomparable, extensions)

    def decorator(func):
        @functools.wraps(func)
        # Parameter indirection; see docstring above and comment below.
        @pytest.mark.usefixtures('mpl_image_comparison_parameters')
        @pytest.mark.parametrize('extension', extensions)
        @pytest.mark.baseline_images(baseline_images)
        # END Parameter indirection.
        @pytest.mark.style(style)
        @_checked_on_freetype_version(freetype_version)
        @functools.wraps(func)
        def wrapper(*args, **kwargs):
            __tracebackhide__ = True
            img = _ImageComparisonBase(tol=tol, remove_text=remove_text,
                                       savefig_kwargs=savefig_kwargs)
            img.delayed_init(func)
            matplotlib.testing.set_font_settings_for_testing()
            func(*args, **kwargs)

            # Parameter indirection:
            # This is hacked on via the mpl_image_comparison_parameters fixture
            # so that we don't need to modify the function's real signature for
            # any parametrization. Modifying the signature is very very tricky
            # and likely to confuse pytest.
            baseline_images, extension = func.parameters

            assert len(plt.get_fignums()) == len(baseline_images), (
                "Test generated {} images but there are {} baseline images"
                .format(len(plt.get_fignums()), len(baseline_images)))
            for idx, baseline in enumerate(baseline_images):
                img.compare(idx, baseline, extension)

        return wrapper

    return decorator 
Example 20
Project: python3_ios   Author: holzschu   File: decorators.py    License: BSD 3-Clause "New" or "Revised" License 4 votes vote down vote up
def _pytest_image_comparison(baseline_images, extensions, tol,
                             freetype_version, remove_text, savefig_kwargs,
                             style):
    """
    Decorate function with image comparison for pytest.

    This function creates a decorator that wraps a figure-generating function
    with image comparison code. Pytest can become confused if we change the
    signature of the function, so we indirectly pass anything we need via the
    `mpl_image_comparison_parameters` fixture and extra markers.
    """
    import pytest

    extensions = map(_mark_xfail_if_format_is_uncomparable, extensions)

    def decorator(func):
        @functools.wraps(func)
        # Parameter indirection; see docstring above and comment below.
        @pytest.mark.usefixtures('mpl_image_comparison_parameters')
        @pytest.mark.parametrize('extension', extensions)
        @pytest.mark.baseline_images(baseline_images)
        # END Parameter indirection.
        @pytest.mark.style(style)
        @_checked_on_freetype_version(freetype_version)
        @functools.wraps(func)
        def wrapper(*args, **kwargs):
            __tracebackhide__ = True
            img = _ImageComparisonBase(tol=tol, remove_text=remove_text,
                                       savefig_kwargs=savefig_kwargs)
            img.delayed_init(func)
            matplotlib.testing.set_font_settings_for_testing()
            func(*args, **kwargs)

            # Parameter indirection:
            # This is hacked on via the mpl_image_comparison_parameters fixture
            # so that we don't need to modify the function's real signature for
            # any parametrization. Modifying the signature is very very tricky
            # and likely to confuse pytest.
            baseline_images, extension = func.parameters

            assert len(plt.get_fignums()) == len(baseline_images), (
                "Test generated {} images but there are {} baseline images"
                .format(len(plt.get_fignums()), len(baseline_images)))
            for idx, baseline in enumerate(baseline_images):
                img.compare(idx, baseline, extension)

        return wrapper

    return decorator 
Example 21
Project: coffeegrindsize   Author: jgagneastro   File: decorators.py    License: MIT License 4 votes vote down vote up
def _pytest_image_comparison(baseline_images, extensions, tol,
                             freetype_version, remove_text, savefig_kwargs,
                             style):
    """
    Decorate function with image comparison for pytest.

    This function creates a decorator that wraps a figure-generating function
    with image comparison code. Pytest can become confused if we change the
    signature of the function, so we indirectly pass anything we need via the
    `mpl_image_comparison_parameters` fixture and extra markers.
    """
    import pytest

    extensions = map(_mark_xfail_if_format_is_uncomparable, extensions)

    def decorator(func):
        @functools.wraps(func)
        # Parameter indirection; see docstring above and comment below.
        @pytest.mark.usefixtures('mpl_image_comparison_parameters')
        @pytest.mark.parametrize('extension', extensions)
        @pytest.mark.baseline_images(baseline_images)
        # END Parameter indirection.
        @pytest.mark.style(style)
        @_checked_on_freetype_version(freetype_version)
        @functools.wraps(func)
        def wrapper(*args, **kwargs):
            __tracebackhide__ = True
            img = _ImageComparisonBase(tol=tol, remove_text=remove_text,
                                       savefig_kwargs=savefig_kwargs)
            img.delayed_init(func)
            matplotlib.testing.set_font_settings_for_testing()
            func(*args, **kwargs)

            # Parameter indirection:
            # This is hacked on via the mpl_image_comparison_parameters fixture
            # so that we don't need to modify the function's real signature for
            # any parametrization. Modifying the signature is very very tricky
            # and likely to confuse pytest.
            baseline_images, extension = func.parameters

            assert len(plt.get_fignums()) == len(baseline_images), (
                "Test generated {} images but there are {} baseline images"
                .format(len(plt.get_fignums()), len(baseline_images)))
            for idx, baseline in enumerate(baseline_images):
                img.compare(idx, baseline, extension)

        return wrapper

    return decorator 
Example 22
Project: CogAlg   Author: boris-kz   File: decorators.py    License: MIT License 4 votes vote down vote up
def _pytest_image_comparison(baseline_images, extensions, tol,
                             freetype_version, remove_text, savefig_kwargs,
                             style):
    """
    Decorate function with image comparison for pytest.

    This function creates a decorator that wraps a figure-generating function
    with image comparison code. Pytest can become confused if we change the
    signature of the function, so we indirectly pass anything we need via the
    `mpl_image_comparison_parameters` fixture and extra markers.
    """
    import pytest

    extensions = map(_mark_skip_if_format_is_uncomparable, extensions)

    def decorator(func):
        @functools.wraps(func)
        # Parameter indirection; see docstring above and comment below.
        @pytest.mark.usefixtures('mpl_image_comparison_parameters')
        @pytest.mark.parametrize('extension', extensions)
        @pytest.mark.baseline_images(baseline_images)
        # END Parameter indirection.
        @pytest.mark.style(style)
        @_checked_on_freetype_version(freetype_version)
        @functools.wraps(func)
        def wrapper(*args, **kwargs):
            __tracebackhide__ = True
            img = _ImageComparisonBase(tol=tol, remove_text=remove_text,
                                       savefig_kwargs=savefig_kwargs)
            img.delayed_init(func)
            matplotlib.testing.set_font_settings_for_testing()
            func(*args, **kwargs)

            # Parameter indirection:
            # This is hacked on via the mpl_image_comparison_parameters fixture
            # so that we don't need to modify the function's real signature for
            # any parametrization. Modifying the signature is very very tricky
            # and likely to confuse pytest.
            baseline_images, extension = func.parameters

            assert len(plt.get_fignums()) == len(baseline_images), (
                "Test generated {} images but there are {} baseline images"
                .format(len(plt.get_fignums()), len(baseline_images)))
            for idx, baseline in enumerate(baseline_images):
                img.compare(idx, baseline, extension)

        return wrapper

    return decorator 
Example 23
Project: twitter-stock-recommendation   Author: alvarobartt   File: decorators.py    License: MIT License 4 votes vote down vote up
def _pytest_image_comparison(baseline_images, extensions, tol,
                             freetype_version, remove_text, savefig_kwargs,
                             style):
    """
    Decorate function with image comparison for pytest.

    This function creates a decorator that wraps a figure-generating function
    with image comparison code. Pytest can become confused if we change the
    signature of the function, so we indirectly pass anything we need via the
    `mpl_image_comparison_parameters` fixture and extra markers.
    """
    import pytest

    extensions = map(_mark_xfail_if_format_is_uncomparable, extensions)

    def decorator(func):
        # Parameter indirection; see docstring above and comment below.
        @pytest.mark.usefixtures('mpl_image_comparison_parameters')
        @pytest.mark.parametrize('extension', extensions)
        @pytest.mark.baseline_images(baseline_images)
        # END Parameter indirection.
        @pytest.mark.style(style)
        @_checked_on_freetype_version(freetype_version)
        @functools.wraps(func)
        def wrapper(*args, **kwargs):
            __tracebackhide__ = True
            img = _ImageComparisonBase(tol=tol, remove_text=remove_text,
                                       savefig_kwargs=savefig_kwargs)
            img.delayed_init(func)
            matplotlib.testing.set_font_settings_for_testing()
            func(*args, **kwargs)

            # Parameter indirection:
            # This is hacked on via the mpl_image_comparison_parameters fixture
            # so that we don't need to modify the function's real signature for
            # any parametrization. Modifying the signature is very very tricky
            # and likely to confuse pytest.
            baseline_images, extension = func.parameters

            assert len(plt.get_fignums()) == len(baseline_images), (
                "Test generated {} images but there are {} baseline images"
                .format(len(plt.get_fignums()), len(baseline_images)))
            for idx, baseline in enumerate(baseline_images):
                img.compare(idx, baseline, extension)

        wrapper.__wrapped__ = func  # For Python 2.7.
        return _copy_metadata(func, wrapper)

    return decorator 
Example 24
Project: twitter-stock-recommendation   Author: alvarobartt   File: decorators.py    License: MIT License 4 votes vote down vote up
def _image_directories(func):
    """
    Compute the baseline and result image directories for testing *func*.
    Create the result directory if it doesn't exist.
    """
    module_name = func.__module__
    if module_name == '__main__':
        # FIXME: this won't work for nested packages in matplotlib.tests
        warnings.warn(
            'Test module run as script. Guessing baseline image locations.')
        script_name = sys.argv[0]
        basedir = os.path.abspath(os.path.dirname(script_name))
        subdir = os.path.splitext(os.path.split(script_name)[1])[0]
    else:
        mods = module_name.split('.')
        if len(mods) >= 3:
            mods.pop(0)
            # mods[0] will be the name of the package being tested (in
            # most cases "matplotlib") However if this is a
            # namespace package pip installed and run via the nose
            # multiprocess plugin or as a specific test this may be
            # missing. See https://github.com/matplotlib/matplotlib/issues/3314
        if mods.pop(0) != 'tests':
            warnings.warn(
                "Module {!r} does not live in a parent module named 'tests'. "
                "This is probably ok, but we may not be able to guess the "
                "correct subdirectory containing the baseline images. If "
                "things go wrong please make sure that there is a parent "
                "directory named 'tests' and that it contains a __init__.py "
                "file (can be empty).".format(module_name))
        subdir = os.path.join(*mods)

        import imp
        def find_dotted_module(module_name, path=None):
            """A version of imp which can handle dots in the module name.
               As for imp.find_module(), the return value is a 3-element
               tuple (file, pathname, description)."""
            res = None
            for sub_mod in module_name.split('.'):
                try:
                    res = file, path, _ = imp.find_module(sub_mod, path)
                    path = [path]
                    if file is not None:
                        file.close()
                except ImportError:
                    # assume namespace package
                    path = list(sys.modules[sub_mod].__path__)
                    res = None, path, None
            return res

        mod_file = find_dotted_module(func.__module__)[1]
        basedir = os.path.dirname(mod_file)

    baseline_dir = os.path.join(basedir, 'baseline_images', subdir)
    result_dir = os.path.abspath(os.path.join('result_images', subdir))

    if not os.path.exists(result_dir):
        cbook.mkdirs(result_dir)

    return baseline_dir, result_dir