Merge pull request matplotlib#27033 from kots14/axes-bar-unit-test-for-issue-26864

Add test_bar in test_datetime

Author: QuLogic

lib/matplotlib/tests/test_datetime.py

@@ -134,11 +134,26 @@ def test_axvspan(self):
         ax3.set_xlabel('Date')
         ax3.set_ylabel('Date')
 
-    @pytest.mark.xfail(reason="Test for bar not written yet")
     @mpl.style.context("default")
     def test_bar(self):
-        fig, ax = plt.subplots()
-        ax.bar(...)
+        mpl.rcParams["date.converter"] = "concise"
+
+        fig, (ax1, ax2) = plt.subplots(2, 1, layout="constrained")
+
+        x_dates = np.array(
+            [
+                datetime.datetime(2020, 6, 30),
+                datetime.datetime(2020, 7, 22),
+                datetime.datetime(2020, 8, 3),
+                datetime.datetime(2020, 9, 14),
+            ],
+            dtype=np.datetime64,
+        )
+        x_ranges = [8800, 2600, 8500, 7400]
+
+        x = np.datetime64(datetime.datetime(2020, 6, 1))
+        ax1.bar(x_dates, x_ranges, width=np.timedelta64(4, "D"))
+        ax2.bar(np.arange(4), x_dates - x, bottom=x)
 
     @pytest.mark.xfail(reason="Test for bar_label not written yet")
     @mpl.style.context("default")