TST: add a test

Author: jklymak

lib/matplotlib/tests/test_axes.py

@@ -1201,6 +1201,22 @@ def test_pcolornearest(fig_test, fig_ref):
     ax.pcolormesh(x2, y2, Z, shading='nearest')
 
 
+@check_figures_equal(extensions=["png"])
+def test_pcolornearestunits(fig_test, fig_ref):
+    ax = fig_test.subplots()
+    x = [datetime.datetime.fromtimestamp(x * 3600) for x in range(10)]
+    y = np.arange(0, 3)
+    np.random.seed(19680801)
+    Z = np.random.randn(2, 9)
+    ax.pcolormesh(x, y, Z, shading='flat')
+
+    ax = fig_ref.subplots()
+    # specify the centers
+    x2 = [datetime.datetime.fromtimestamp((x + 0.5) * 3600) for x in range(9)]
+    y2 = y[:-1] + np.diff(y) / 2
+    ax.pcolormesh(x2, y2, Z, shading='nearest')
+
+
 @check_figures_equal(extensions=["png"])
 def test_pcolordropdata(fig_test, fig_ref):
     ax = fig_test.subplots()