from io import BytesIO from unittest import SkipTest import numpy as np import panel as pn import param from bokeh.io import curdoc from bokeh.themes.theme import Theme from panel.widgets import DiscreteSlider, FloatSlider, Player from pyviz_comms import CommManager from holoviews import Curve, DynamicMap, GridSpace, HoloMap, Image, Table from holoviews.element.comparison import ComparisonTestCase from holoviews.plotting import Renderer from holoviews.plotting.bokeh import BokehRenderer from holoviews.streams import Stream class BokehRendererTest(ComparisonTestCase): def setUp(self): self.image1 = Image(np.array([[0,1],[2,3]]), label='Image1') self.image2 = Image(np.array([[1,0],[4,-2]]), label='Image2') self.map1 = HoloMap({1:self.image1, 2:self.image2}, label='TestMap') self.renderer = BokehRenderer.instance() self.nbcontext = Renderer.notebook_context self.comm_manager = Renderer.comm_manager with param.logging_level('ERROR'): Renderer.notebook_context = False Renderer.comm_manager = CommManager def tearDown(self): with param.logging_level('ERROR'): Renderer.notebook_context = self.nbcontext Renderer.comm_manager = self.comm_manager def test_save_html(self): bytesio = BytesIO() self.renderer.save(self.image1, bytesio) def test_render_get_plot_server_doc(self): renderer = self.renderer.instance(mode='server') plot = renderer.get_plot(self.image1) self.assertIs(plot.document, curdoc()) def test_get_size_single_plot(self): plot = self.renderer.get_plot(self.image1) w, h = self.renderer.get_size(plot) self.assertEqual((w, h), (300, 300)) def test_get_size_row_plot(self): plot = self.renderer.get_plot(self.image1+self.image2) w, h = self.renderer.get_size(plot) self.assertEqual((w, h), (600, 300)) def test_get_size_column_plot(self): plot = self.renderer.get_plot((self.image1+self.image2).cols(1)) w, h = self.renderer.get_size(plot) self.assertEqual((w, h), (300, 600)) def test_get_size_grid_plot(self): grid = GridSpace({(i, j): self.image1 for i in range(3) for j in range(3)}) plot = self.renderer.get_plot(grid) w, h = self.renderer.get_size(plot) self.assertEqual((w, h), (446, 437)) def test_get_size_table(self): table = Table(range(10), kdims=['x']) plot = self.renderer.get_plot(table) w, h = self.renderer.get_size(plot) self.assertEqual((w, h), (400, 300)) def test_get_size_tables_in_layout(self): table = Table(range(10), kdims=['x']) plot = self.renderer.get_plot(table+table) w, h = self.renderer.get_size(plot) self.assertEqual((w, h), (800, 300)) def test_theme_rendering(self): attrs = {'figure': {'outline_line_color': '#444444'}} theme = Theme(json={'attrs' : attrs}) self.renderer.theme = theme plot = self.renderer.get_plot(Curve([])) self.renderer.components(plot, 'html') self.assertEqual(plot.state.outline_line_color, '#444444') def test_render_to_png(self): curve = Curve([]) renderer = BokehRenderer.instance(fig='png') try: png, info = renderer(curve) except RuntimeError: raise SkipTest("Test requires selenium") self.assertIsInstance(png, bytes) self.assertEqual(info['file-ext'], 'png') def test_render_static(self): curve = Curve([]) obj, _ = self.renderer._validate(curve, None) self.assertIsInstance(obj, pn.pane.HoloViews) self.assertEqual(obj.center, True) self.assertIs(obj.renderer, self.renderer) self.assertEqual(obj.backend, 'bokeh') def test_render_holomap_individual(self): hmap = HoloMap({i: Curve([1, 2, i]) for i in range(5)}) obj, _ = self.renderer._validate(hmap, None) self.assertIsInstance(obj, pn.pane.HoloViews) self.assertEqual(obj.center, True) self.assertEqual(obj.widget_location, 'right') self.assertEqual(obj.widget_type, 'individual') widgets = obj.layout.select(DiscreteSlider) self.assertEqual(len(widgets), 1) slider = widgets[0] self.assertEqual(slider.options, dict([(str(i), i) for i in range(5)])) def test_render_holomap_embedded(self): hmap = HoloMap({i: Curve([1, 2, i]) for i in range(5)}) data, _ = self.renderer.components(hmap) self.assertIn('State"', data['text/html']) # def test_render_holomap_not_embedded(self): # hmap = HoloMap({i: Curve([1, 2, i]) for i in range(5)}) # data, _ = self.renderer.instance(widget_mode='live').components(hmap) # self.assertNotIn('State"', data['text/html']) def test_render_holomap_scrubber(self): hmap = HoloMap({i: Curve([1, 2, i]) for i in range(5)}) obj, _ = self.renderer._validate(hmap, 'scrubber') self.assertIsInstance(obj, pn.pane.HoloViews) self.assertEqual(obj.center, True) self.assertEqual(obj.widget_location, 'bottom') self.assertEqual(obj.widget_type, 'scrubber') widgets = obj.layout.select(Player) self.assertEqual(len(widgets), 1) player = widgets[0] self.assertEqual(player.start, 0) self.assertEqual(player.end, 4) def test_render_holomap_scrubber_fps(self): hmap = HoloMap({i: Curve([1, 2, i]) for i in range(5)}) obj, _ = self.renderer.instance(fps=2)._validate(hmap, 'scrubber') self.assertIsInstance(obj, pn.pane.HoloViews) widgets = obj.layout.select(Player) self.assertEqual(len(widgets), 1) player = widgets[0] self.assertEqual(player.interval, 500) def test_render_holomap_individual_widget_position(self): hmap = HoloMap({i: Curve([1, 2, i]) for i in range(5)}) obj, _ = self.renderer.instance(widget_location='top')._validate(hmap, None) self.assertIsInstance(obj, pn.pane.HoloViews) self.assertEqual(obj.center, True) self.assertEqual(obj.widget_location, 'top') self.assertEqual(obj.widget_type, 'individual') def test_render_dynamicmap_with_dims(self): dmap = DynamicMap(lambda y: Curve([1, 2, y]), kdims=['y']).redim.range(y=(0.1, 5)) obj, _ = self.renderer._validate(dmap, None) self.renderer.components(obj) [(plot, pane)] = obj._plots.values() cds = plot.handles['cds'] self.assertEqual(cds.data['y'][2], 0.1) slider = obj.layout.select(FloatSlider)[0] slider.value = 3.1 self.assertEqual(cds.data['y'][2], 3.1) def test_render_dynamicmap_with_stream(self): stream = Stream.define('Custom', y=2)() dmap = DynamicMap(lambda y: Curve([1, 2, y]), kdims=['y'], streams=[stream]) obj, _ = self.renderer._validate(dmap, None) self.renderer.components(obj) [(plot, pane)] = obj._plots.values() cds = plot.handles['cds'] self.assertEqual(cds.data['y'][2], 2) stream.event(y=3) self.assertEqual(cds.data['y'][2], 3) def test_render_dynamicmap_with_stream_dims(self): stream = Stream.define('Custom', y=2)() dmap = DynamicMap(lambda x, y: Curve([x, 1, y]), kdims=['x', 'y'], streams=[stream]).redim.values(x=[1, 2, 3]) obj, _ = self.renderer._validate(dmap, None) self.renderer.components(obj) [(plot, pane)] = obj._plots.values() cds = plot.handles['cds'] self.assertEqual(cds.data['y'][2], 2) stream.event(y=3) self.assertEqual(cds.data['y'][2], 3) self.assertEqual(cds.data['y'][0], 1) slider = obj.layout.select(DiscreteSlider)[0] slider.value = 3 self.assertEqual(cds.data['y'][0], 3)