[core][tests][display] Remove nose

IPython/core/tests/test_display.py

@@ -1,490 +1,511 b''
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
 import json
 import os
 import warnings
 
 from unittest import mock
 
-import nose.tools as nt
+import pytest
 
 from IPython import display
 from IPython.core.getipython import get_ipython
 from IPython.utils.io import capture_output
 from IPython.utils.tempdir import NamedFileInTemporaryDirectory
 from IPython import paths as ipath
 from IPython.testing.tools import AssertNotPrints
 
 import IPython.testing.decorators as dec
 
 def test_image_size():
     """Simple test for display.Image(args, width=x,height=y)"""
     thisurl = 'http://www.google.fr/images/srpr/logo3w.png'
     img = display.Image(url=thisurl, width=200, height=200)
-    nt.assert_equal(u'<img src="%s" width="200" height="200"/>' % (thisurl), img._repr_html_())
+    assert '<img src="%s" width="200" height="200"/>' % (thisurl) == img._repr_html_()
     img = display.Image(url=thisurl, metadata={'width':200, 'height':200})
-    nt.assert_equal(u'<img src="%s" width="200" height="200"/>' % (thisurl), img._repr_html_())
+    assert '<img src="%s" width="200" height="200"/>' % (thisurl) == img._repr_html_()
     img = display.Image(url=thisurl, width=200)
-    nt.assert_equal(u'<img src="%s" width="200"/>' % (thisurl), img._repr_html_())
+    assert '<img src="%s" width="200"/>' % (thisurl) == img._repr_html_()
     img = display.Image(url=thisurl)
-    nt.assert_equal(u'<img src="%s"/>' % (thisurl), img._repr_html_())
+    assert '<img src="%s"/>' % (thisurl) == img._repr_html_()
     img = display.Image(url=thisurl, unconfined=True)
-    nt.assert_equal(u'<img src="%s" class="unconfined"/>' % (thisurl), img._repr_html_())
+    assert '<img src="%s" class="unconfined"/>' % (thisurl) == img._repr_html_()
 
 
 def test_image_mimes():
     fmt = get_ipython().display_formatter.format
     for format in display.Image._ACCEPTABLE_EMBEDDINGS:
         mime = display.Image._MIMETYPES[format]
         img = display.Image(b'garbage', format=format)
         data, metadata = fmt(img)
-        nt.assert_equal(sorted(data), sorted([mime, 'text/plain']))
+        assert sorted(data) == sorted([mime, "text/plain"])
 
 
 def test_geojson():
 
     gj = display.GeoJSON(data={
             "type": "Feature",
             "geometry": {
                 "type": "Point",
                 "coordinates": [-81.327, 296.038]
             },
             "properties": {
                 "name": "Inca City"
             }
         },
         url_template="http://s3-eu-west-1.amazonaws.com/whereonmars.cartodb.net/{basemap_id}/{z}/{x}/{y}.png",
         layer_options={
             "basemap_id": "celestia_mars-shaded-16k_global",
             "attribution": "Celestia/praesepe",
             "minZoom": 0,
             "maxZoom": 18,
-        })
-    nt.assert_equal(u'<IPython.core.display.GeoJSON object>', str(gj))
+        },
+    )
+    assert "<IPython.core.display.GeoJSON object>" == str(gj)
+
 
 def test_retina_png():
     here = os.path.dirname(__file__)
     img = display.Image(os.path.join(here, "2x2.png"), retina=True)
-    nt.assert_equal(img.height, 1)
-    nt.assert_equal(img.width, 1)
+    assert img.height == 1
+    assert img.width == 1
     data, md = img._repr_png_()
-    nt.assert_equal(md['width'], 1)
-    nt.assert_equal(md['height'], 1)
+    assert md["width"] == 1
+    assert md["height"] == 1
+
 
 def test_embed_svg_url():
     import gzip
     from io import BytesIO
     svg_data = b'<svg><circle x="0" y="0" r="1"/></svg>'
     url = 'http://test.com/circle.svg'
 
     gzip_svg = BytesIO()
     with gzip.open(gzip_svg, 'wb') as fp:
         fp.write(svg_data)
     gzip_svg = gzip_svg.getvalue()
 
     def mocked_urlopen(*args, **kwargs):
         class MockResponse:
             def __init__(self, svg):
                 self._svg_data = svg
                 self.headers = {'content-type': 'image/svg+xml'}
 
             def read(self):
                 return self._svg_data
 
         if args[0] == url:
             return MockResponse(svg_data)
         elif args[0] == url + "z":
             ret = MockResponse(gzip_svg)
             ret.headers["content-encoding"] = "gzip"
             return ret
         return MockResponse(None)
 
     with mock.patch('urllib.request.urlopen', side_effect=mocked_urlopen):
         svg = display.SVG(url=url)
-        nt.assert_true(svg._repr_svg_().startswith('<svg'))
-        svg = display.SVG(url=url + 'z')
-        nt.assert_true(svg._repr_svg_().startswith('<svg'))
+        assert svg._repr_svg_().startswith("<svg") is True
+        svg = display.SVG(url=url + "z")
+        assert svg._repr_svg_().startswith("<svg") is True
+
 
 def test_retina_jpeg():
     here = os.path.dirname(__file__)
     img = display.Image(os.path.join(here, "2x2.jpg"), retina=True)
-    nt.assert_equal(img.height, 1)
-    nt.assert_equal(img.width, 1)
+    assert img.height == 1
+    assert img.width == 1
     data, md = img._repr_jpeg_()
-    nt.assert_equal(md['width'], 1)
-    nt.assert_equal(md['height'], 1)
+    assert md["width"] == 1
+    assert md["height"] == 1
+
 
 def test_base64image():
     display.Image("iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAACnej3aAAAAAWJLR0QAiAUdSAAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB94BCRQnOqNu0b4AAAAKSURBVAjXY2AAAAACAAHiIbwzAAAAAElFTkSuQmCC")
 
 def test_image_filename_defaults():
     '''test format constraint, and validity of jpeg and png'''
     tpath = ipath.get_ipython_package_dir()
-    nt.assert_raises(ValueError, display.Image, filename=os.path.join(tpath, 'testing/tests/badformat.zip'),
-                     embed=True)
-    nt.assert_raises(ValueError, display.Image)
-    nt.assert_raises(ValueError, display.Image, data='this is not an image', format='badformat', embed=True)
-    # check both paths to allow packages to test at build and install time
+    pytest.raises(
+        ValueError,
+        display.Image,
+        filename=os.path.join(tpath, "testing/tests/badformat.zip"),
+        embed=True,
+    )
+    pytest.raises(ValueError, display.Image)
+    pytest.raises(
+        ValueError,
+        display.Image,
+        data="this is not an image",
+        format="badformat",
+        embed=True,
+    )
+    # check boths paths to allow packages to test at build and install time
     imgfile = os.path.join(tpath, 'core/tests/2x2.png')
     img = display.Image(filename=imgfile)
-    nt.assert_equal('png', img.format)
-    nt.assert_is_not_none(img._repr_png_())
-    img = display.Image(filename=os.path.join(tpath, 'testing/tests/logo.jpg'), embed=False)
-    nt.assert_equal('jpeg', img.format)
-    nt.assert_is_none(img._repr_jpeg_())
+    assert "png" == img.format
+    assert img._repr_png_() is not None
+    img = display.Image(
+        filename=os.path.join(tpath, "testing/tests/logo.jpg"), embed=False
+    )
+    assert "jpeg" == img.format
+    assert img._repr_jpeg_() is None
 
 def _get_inline_config():
     from matplotlib_inline.config import InlineBackend
     return InlineBackend.instance()
 
 
 @dec.skip_without("ipykernel")
 @dec.skip_without("matplotlib")
 def test_set_matplotlib_close():
     cfg = _get_inline_config()
     cfg.close_figures = False
     display.set_matplotlib_close()
     assert cfg.close_figures
     display.set_matplotlib_close(False)
     assert not cfg.close_figures
 
 _fmt_mime_map = {
     'png': 'image/png',
     'jpeg': 'image/jpeg',
     'pdf': 'application/pdf',
     'retina': 'image/png',
     'svg': 'image/svg+xml',
 }
 
 @dec.skip_without('matplotlib')
 def test_set_matplotlib_formats():
     from matplotlib.figure import Figure
     formatters = get_ipython().display_formatter.formatters
     for formats in [
         ('png',),
         ('pdf', 'svg'),
         ('jpeg', 'retina', 'png'),
         (),
     ]:
         active_mimes = {_fmt_mime_map[fmt] for fmt in formats}
         display.set_matplotlib_formats(*formats)
         for mime, f in formatters.items():
             if mime in active_mimes:
-                nt.assert_in(Figure, f)
+                assert Figure in f
             else:
-                nt.assert_not_in(Figure, f)
+                assert Figure not in f
 
 
 @dec.skip_without("ipykernel")
 @dec.skip_without("matplotlib")
 def test_set_matplotlib_formats_kwargs():
     from matplotlib.figure import Figure
     ip = get_ipython()
     cfg = _get_inline_config()
     cfg.print_figure_kwargs.update(dict(foo='bar'))
     kwargs = dict(dpi=150)
     display.set_matplotlib_formats('png', **kwargs)
     formatter = ip.display_formatter.formatters['image/png']
     f = formatter.lookup_by_type(Figure)
     formatter_kwargs = f.keywords
     expected = kwargs
     expected["base64"] = True
     expected["fmt"] = "png"
     expected.update(cfg.print_figure_kwargs)
-    nt.assert_equal(formatter_kwargs, expected)
+    assert formatter_kwargs == expected
 
 def test_display_available():
     """
     Test that display is available without import
 
     We don't really care if it's in builtin or anything else, but it should
     always be available.
     """
     ip = get_ipython()
     with AssertNotPrints('NameError'):
         ip.run_cell('display')
     try:
         ip.run_cell('del display')
     except NameError:
         pass # it's ok, it might be in builtins
     # even if deleted it should be back
     with AssertNotPrints('NameError'):
         ip.run_cell('display')
 
 def test_textdisplayobj_pretty_repr():
-     p = display.Pretty("This is a simple test")
-     nt.assert_equal(repr(p), '<IPython.core.display.Pretty object>')
-     nt.assert_equal(p.data, 'This is a simple test')
+    p = display.Pretty("This is a simple test")
+    assert repr(p) == "<IPython.core.display.Pretty object>"
+    assert p.data == "This is a simple test"
+
+    p._show_mem_addr = True
+    assert repr(p) == object.__repr__(p)
 
-     p._show_mem_addr = True
-     nt.assert_equal(repr(p), object.__repr__(p))
 
 def test_displayobject_repr():
-    h = display.HTML('<br />')
-    nt.assert_equal(repr(h), '<IPython.core.display.HTML object>')
+    h = display.HTML("<br />")
+    assert repr(h) == "<IPython.core.display.HTML object>"
     h._show_mem_addr = True
-    nt.assert_equal(repr(h), object.__repr__(h))
+    assert repr(h) == object.__repr__(h)
     h._show_mem_addr = False
-    nt.assert_equal(repr(h), '<IPython.core.display.HTML object>')
+    assert repr(h) == "<IPython.core.display.HTML object>"
 
-    j = display.Javascript('')
-    nt.assert_equal(repr(j), '<IPython.core.display.Javascript object>')
+    j = display.Javascript("")
+    assert repr(j) == "<IPython.core.display.Javascript object>"
     j._show_mem_addr = True
-    nt.assert_equal(repr(j), object.__repr__(j))
+    assert repr(j) == object.__repr__(j)
     j._show_mem_addr = False
-    nt.assert_equal(repr(j), '<IPython.core.display.Javascript object>')
+    assert repr(j) == "<IPython.core.display.Javascript object>"
 
 @mock.patch('warnings.warn')
 def test_encourage_iframe_over_html(m_warn):
     display.HTML()
     m_warn.assert_not_called()
 
     display.HTML('<br />')
     m_warn.assert_not_called()
 
     display.HTML('<html><p>Lots of content here</p><iframe src="http://a.com"></iframe>')
     m_warn.assert_not_called()
 
     display.HTML('<iframe src="http://a.com"></iframe>')
     m_warn.assert_called_with('Consider using IPython.display.IFrame instead')
 
     m_warn.reset_mock()
     display.HTML('<IFRAME SRC="http://a.com"></IFRAME>')
     m_warn.assert_called_with('Consider using IPython.display.IFrame instead')
 
 def test_progress():
     p = display.ProgressBar(10)
-    nt.assert_in('0/10',repr(p))
-    p.html_width = '100%'
+    assert "0/10" in repr(p)
+    p.html_width = "100%"
     p.progress = 5
-    nt.assert_equal(p._repr_html_(), "<progress style='width:100%' max='10' value='5'></progress>")
+    assert (
+        p._repr_html_() == "<progress style='width:100%' max='10' value='5'></progress>"
+    )
+
 
 def test_progress_iter():
     with capture_output(display=False) as captured:
         for i in display.ProgressBar(5):
             out = captured.stdout
-            nt.assert_in('{0}/5'.format(i), out)
+            assert "{0}/5".format(i) in out
     out = captured.stdout
-    nt.assert_in('5/5', out)
+    assert "5/5" in out
+
 
 def test_json():
     d = {'a': 5}
     lis = [d]
     metadata = [
         {'expanded': False, 'root': 'root'},
         {'expanded': True,  'root': 'root'},
         {'expanded': False, 'root': 'custom'},
         {'expanded': True,  'root': 'custom'},
     ]
     json_objs = [
         display.JSON(d),
         display.JSON(d, expanded=True),
         display.JSON(d, root='custom'),
         display.JSON(d, expanded=True, root='custom'),
     ]
     for j, md in zip(json_objs, metadata):
-        nt.assert_equal(j._repr_json_(), (d, md))
+        assert j._repr_json_() == (d, md)
 
     with warnings.catch_warnings(record=True) as w:
         warnings.simplefilter("always")
         j = display.JSON(json.dumps(d))
-        nt.assert_equal(len(w), 1)
-        nt.assert_equal(j._repr_json_(), (d, metadata[0]))
+        assert len(w) == 1
+        assert j._repr_json_() == (d, metadata[0])
 
     json_objs = [
         display.JSON(lis),
         display.JSON(lis, expanded=True),
         display.JSON(lis, root='custom'),
         display.JSON(lis, expanded=True, root='custom'),
     ]
     for j, md in zip(json_objs, metadata):
-        nt.assert_equal(j._repr_json_(), (lis, md))
+        assert j._repr_json_() == (lis, md)
 
     with warnings.catch_warnings(record=True) as w:
         warnings.simplefilter("always")
         j = display.JSON(json.dumps(lis))
-        nt.assert_equal(len(w), 1)
-        nt.assert_equal(j._repr_json_(), (lis, metadata[0]))
+        assert len(w) == 1
+        assert j._repr_json_() == (lis, metadata[0])
+
 
 def test_video_embedding():
     """use a tempfile, with dummy-data, to ensure that video embedding doesn't crash"""
     v = display.Video("http://ignored")
     assert not v.embed
     html = v._repr_html_()
-    nt.assert_not_in('src="data:', html)
-    nt.assert_in('src="http://ignored"', html)
+    assert 'src="data:' not in html
+    assert 'src="http://ignored"' in html
 
-    with nt.assert_raises(ValueError):
+    with pytest.raises(ValueError):
         v = display.Video(b'abc')
 
     with NamedFileInTemporaryDirectory('test.mp4') as f:
         f.write(b'abc')
         f.close()
 
         v = display.Video(f.name)
         assert not v.embed
         html = v._repr_html_()
-        nt.assert_not_in('src="data:', html)
+        assert 'src="data:' not in html
 
         v = display.Video(f.name, embed=True)
         html = v._repr_html_()
-        nt.assert_in('src="data:video/mp4;base64,YWJj"',html)
+        assert 'src="data:video/mp4;base64,YWJj"' in html
 
         v = display.Video(f.name, embed=True, mimetype='video/other')
         html = v._repr_html_()
-        nt.assert_in('src="data:video/other;base64,YWJj"',html)
+        assert 'src="data:video/other;base64,YWJj"' in html
 
         v = display.Video(b'abc', embed=True, mimetype='video/mp4')
         html = v._repr_html_()
-        nt.assert_in('src="data:video/mp4;base64,YWJj"',html)
+        assert 'src="data:video/mp4;base64,YWJj"' in html
 
         v = display.Video(u'YWJj', embed=True, mimetype='video/xyz')
         html = v._repr_html_()
-        nt.assert_in('src="data:video/xyz;base64,YWJj"',html)
+        assert 'src="data:video/xyz;base64,YWJj"' in html
 
 def test_html_metadata():
     s = "<h1>Test</h1>"
     h = display.HTML(s, metadata={"isolated": True})
-    nt.assert_equal(h._repr_html_(), (s, {"isolated": True}))
+    assert h._repr_html_() == (s, {"isolated": True})
+
 
 def test_display_id():
     ip = get_ipython()
     with mock.patch.object(ip.display_pub, 'publish') as pub:
         handle = display.display('x')
-        nt.assert_is(handle, None)
+        assert handle is None
         handle = display.display('y', display_id='secret')
-        nt.assert_is_instance(handle, display.DisplayHandle)
+        assert isinstance(handle, display.DisplayHandle)
         handle2 = display.display('z', display_id=True)
-        nt.assert_is_instance(handle2, display.DisplayHandle)
-    nt.assert_not_equal(handle.display_id, handle2.display_id)
+        assert isinstance(handle2, display.DisplayHandle)
+    assert handle.display_id != handle2.display_id
 
-    nt.assert_equal(pub.call_count, 3)
+    assert pub.call_count == 3
     args, kwargs = pub.call_args_list[0]
-    nt.assert_equal(args, ())
-    nt.assert_equal(kwargs, {
+    assert args == ()
+    assert kwargs == {
         'data': {
             'text/plain': repr('x')
         },
         'metadata': {},
-    })
+    }
     args, kwargs = pub.call_args_list[1]
-    nt.assert_equal(args, ())
-    nt.assert_equal(kwargs, {
+    assert args == ()
+    assert kwargs == {
         'data': {
             'text/plain': repr('y')
         },
         'metadata': {},
         'transient': {
             'display_id': handle.display_id,
         },
-    })
+    }
     args, kwargs = pub.call_args_list[2]
-    nt.assert_equal(args, ())
-    nt.assert_equal(kwargs, {
+    assert args == ()
+    assert kwargs == {
         'data': {
             'text/plain': repr('z')
         },
         'metadata': {},
         'transient': {
             'display_id': handle2.display_id,
         },
-    })
+    }
 
 
 def test_update_display():
     ip = get_ipython()
     with mock.patch.object(ip.display_pub, 'publish') as pub:
-        with nt.assert_raises(TypeError):
+        with pytest.raises(TypeError):
             display.update_display('x')
         display.update_display('x', display_id='1')
         display.update_display('y', display_id='2')
     args, kwargs = pub.call_args_list[0]
-    nt.assert_equal(args, ())
-    nt.assert_equal(kwargs, {
+    assert args == ()
+    assert kwargs == {
         'data': {
             'text/plain': repr('x')
         },
         'metadata': {},
         'transient': {
             'display_id': '1',
         },
         'update': True,
-    })
+    }
     args, kwargs = pub.call_args_list[1]
-    nt.assert_equal(args, ())
-    nt.assert_equal(kwargs, {
+    assert args == ()
+    assert kwargs == {
         'data': {
             'text/plain': repr('y')
         },
         'metadata': {},
         'transient': {
             'display_id': '2',
         },
         'update': True,
-    })
+    }
 
 
 def test_display_handle():
     ip = get_ipython()
     handle = display.DisplayHandle()
-    nt.assert_is_instance(handle.display_id, str)
-    handle = display.DisplayHandle('my-id')
-    nt.assert_equal(handle.display_id, 'my-id')
-    with mock.patch.object(ip.display_pub, 'publish') as pub:
-        handle.display('x')
-        handle.update('y')
+    assert isinstance(handle.display_id, str)
+    handle = display.DisplayHandle("my-id")
+    assert handle.display_id == "my-id"
+    with mock.patch.object(ip.display_pub, "publish") as pub:
+        handle.display("x")
+        handle.update("y")
 
     args, kwargs = pub.call_args_list[0]
-    nt.assert_equal(args, ())
-    nt.assert_equal(kwargs, {
+    assert args == ()
+    assert kwargs == {
         'data': {
             'text/plain': repr('x')
         },
         'metadata': {},
         'transient': {
             'display_id': handle.display_id,
         }
-    })
+    }
     args, kwargs = pub.call_args_list[1]
-    nt.assert_equal(args, ())
-    nt.assert_equal(kwargs, {
+    assert args == ()
+    assert kwargs == {
         'data': {
             'text/plain': repr('y')
         },
         'metadata': {},
         'transient': {
             'display_id': handle.display_id,
         },
         'update': True,
-    })
+    }
 
 
 def test_image_alt_tag():
     """Simple test for display.Image(args, alt=x,)"""
     thisurl = "http://example.com/image.png"
     img = display.Image(url=thisurl, alt="an image")
-    nt.assert_equal(u'<img src="%s" alt="an image"/>' % (thisurl), img._repr_html_())
+    assert '<img src="%s" alt="an image"/>' % (thisurl) == img._repr_html_()
     img = display.Image(url=thisurl, unconfined=True, alt="an image")
-    nt.assert_equal(
-        u'<img src="%s" class="unconfined" alt="an image"/>' % (thisurl),
-        img._repr_html_(),
+    assert (
+        '<img src="%s" class="unconfined" alt="an image"/>' % (thisurl)
+        == img._repr_html_()
     )
     img = display.Image(url=thisurl, alt='>"& <')
-    nt.assert_equal(
-        u'<img src="%s" alt="&gt;&quot;&amp; &lt;"/>' % (thisurl), img._repr_html_()
-    )
+    assert '<img src="%s" alt="&gt;&quot;&amp; &lt;"/>' % (thisurl) == img._repr_html_()
 
     img = display.Image(url=thisurl, metadata={"alt": "an image"})
-    nt.assert_equal(img.alt, "an image")
-
+    assert img.alt == "an image"
     here = os.path.dirname(__file__)
     img = display.Image(os.path.join(here, "2x2.png"), alt="an image")
-    nt.assert_equal(img.alt, "an image")
+    assert img.alt == "an image"
     _, md = img._repr_png_()
-    nt.assert_equal(md["alt"], "an image")
+    assert md["alt"] == "an image"
 
 
[e-mail](FileNotFoundError)
 def test_image_bad_filename_raises_proper_exception():
-    display.Image("/this/file/does/not/exist/")._repr_png_()
+    with pytest.raises(FileNotFoundError):
+        display.Image("/this/file/does/not/exist/")._repr_png_()