TST: add a test of not removing overlapping locations

tacaswell · tacaswell · commit 964e8cd74df9 · 2019-04-11T21:44:53.000-04:00
diff --git a/lib/matplotlib/tests/test_ticker.py b/lib/matplotlib/tests/test_ticker.py
@@ -923,3 +923,24 @@ def minorticksubplot(xminor, yminor, i):
     minorticksubplot(True, False, 2)
     minorticksubplot(False, True, 3)
     minorticksubplot(True, True, 4)
+
+
+def test_remove_overlap():
+    import numpy as np
+    import matplotlib.dates as mdates
+
+    t = np.arange("2018-11-03", "2018-11-06", dtype="datetime64")
+    x = np.ones(len(t))
+
+    fig, ax = plt.subplots()
+    ax.plot(t, x)
+
+    ax.xaxis.set_major_locator(mdates.DayLocator())
+    ax.xaxis.set_major_formatter(mdates.DateFormatter('\n%a'))
+
+    ax.xaxis.set_minor_locator(mdates.HourLocator((0, 6, 12, 18)))
+    ax.xaxis.set_minor_formatter(mdates.DateFormatter('%H:%M'))
+
+    assert len(ax.xaxis.get_minorticklocs()) == 6
+    ax.xaxis.remove_overlapping_locs = False
+    assert len(ax.xaxis.get_minorticklocs()) == 9
