Dec 13, 2023
diff --git a/lib/matplotlib/tests/test_datetime.py b/lib/matplotlib/tests/test_datetime.py

 import matplotlib.pyplot as plt
 import matplotlib as mpl

 import matplotlib.tri as tri

 class TestDatetimePlotting:
    @mpl.style.context("default")
        ax3.plot(x_dates, y_dates)
        ax3.text(test_date, test_date, "Inserted Text", **font_properties)

    @pytest.mark.xfail(reason="Test for tricontour not written yet")
    @mpl.style.context("default")
    def test_tricontour(self):
        fig, ax = plt.subplots()
        ax.tricontour(...)

        # make unequailly distributed data points:

        dates = np.arange(np.datetime64('2022-01-01'), np.datetime64('2022-12-28'),
                         np.timedelta64(1,'D'))
        n = len(dates)
        np.random.seed(19680801)
        indx  = np.array(np.random.random_sample(n//2)*n, dtype='int')
        np.random.seed(100)
        indy  = np.array(np.random.random_sample(n//2)*n, dtype='int')
        x = indx - n/2.
        y = indy - n/2.
        z = x**2 + y**2 - x/4.
        levels = np.linspace(z.min(), z.max(), 5)
        dates_x = dates[indx]
        dates_y = dates[indy]

        # plot:
        fig, (ax0, ax1, ax2) = plt.subplots(1,3, figsize=(20, 5))
        # dates on y axis
        ax0.plot(x, dates_y, 'o', markersize=2, color='lightgrey')
        ax0.tricontour(x, dates_y, z, levels=levels)
        ax0.tick_params('y',labelrotation=45)
        # dates on x axis
        ax1.plot(dates_x, y, 'o', markersize=2, color='lightgrey')
        ax1.tricontour(dates_x, y, z, levels=levels)
        ax1.tick_params('x',labelrotation=45)
        # dates on x and y axes
        ax2.plot(dates_x, dates_y, 'o', markersize=2, color='lightgrey')
        ax2.tricontour(dates_x, dates_y, z, levels=levels)
        ax2.tick_params(labelrotation=45)

        fig.tight_layout()
        plt.show()

    @pytest.mark.xfail(reason="Test for tricontourf not written yet")
    @mpl.style.context("default")
Original file line number	Diff line number	Diff line change
Expand Up		@@ -5,7 +5,7 @@

		import matplotlib.pyplot as plt
		import matplotlib as mpl

		import matplotlib.tri as tri

		class TestDatetimePlotting:
		@mpl.style.context("default")
Expand DownExpand Up		@@ -805,11 +805,42 @@ def test_text(self):
		ax3.plot(x_dates, y_dates)
		ax3.text(test_date, test_date, "Inserted Text", **font_properties)

		@pytest.mark.xfail(reason="Test for tricontour not written yet")
		@mpl.style.context("default")
		def test_tricontour(self):
		fig, ax = plt.subplots()
		ax.tricontour(...)

		# make unequailly distributed data points:

		dates = np.arange(np.datetime64('2022-01-01'), np.datetime64('2022-12-28'),
		np.timedelta64(1,'D'))
		n = len(dates)
		np.random.seed(19680801)
		indx = np.array(np.random.random_sample(n//2)*n, dtype='int')
		np.random.seed(100)
		indy = np.array(np.random.random_sample(n//2)*n, dtype='int')
		x = indx - n/2.
		y = indy - n/2.
		z = x2 + y2 - x/4.
		levels = np.linspace(z.min(), z.max(), 5)
		dates_x = dates[indx]
		dates_y = dates[indy]

		# plot:
		fig, (ax0, ax1, ax2) = plt.subplots(1,3, figsize=(20, 5))
		# dates on y axis
		ax0.plot(x, dates_y, 'o', markersize=2, color='lightgrey')
		ax0.tricontour(x, dates_y, z, levels=levels)
		ax0.tick_params('y',labelrotation=45)
		# dates on x axis
		ax1.plot(dates_x, y, 'o', markersize=2, color='lightgrey')
		ax1.tricontour(dates_x, y, z, levels=levels)
		ax1.tick_params('x',labelrotation=45)
		# dates on x and y axes
		ax2.plot(dates_x, dates_y, 'o', markersize=2, color='lightgrey')
		ax2.tricontour(dates_x, dates_y, z, levels=levels)
		ax2.tick_params(labelrotation=45)

		fig.tight_layout()
		plt.show()

		@pytest.mark.xfail(reason="Test for tricontourf not written yet")
		@mpl.style.context("default")
Expand Down