diff --git a/lib/matplotlib/tests/test_datetime.py b/lib/matplotlib/tests/test_datetime.py
index 3c8cc8b5b8bb..0656f4c7cf48 100644
--- a/lib/matplotlib/tests/test_datetime.py
+++ b/lib/matplotlib/tests/test_datetime.py
@@ -1,6 +1,6 @@
import datetime
+import math
import numpy as np
-
import pytest
import matplotlib.pyplot as plt
@@ -259,11 +259,34 @@ def test_bxp(self):
ax.xaxis.set_major_formatter(mpl.dates.DateFormatter("%Y-%m-%d"))
ax.set_title('Box plot with datetime data')
- @pytest.mark.xfail(reason="Test for clabel not written yet")
@mpl.style.context("default")
def test_clabel(self):
+ # Sample data for contour plot
+ dates = [datetime.datetime(2023, 10, 1) + datetime.timedelta(days=i)
+ for i in range(10)]
+
+ x_start, x_end, x_step = -10.0, 5.0, 0.5
+ y_start, y_end, y_step = 0, 10, 1
+
+ x = np.arange(x_start, x_end, x_step)
+ y = np.arange(y_start, y_end, y_step)
+
+ # In this case, Y axis has dates
+ X, Y = np.meshgrid(x, dates)
+
+ # In this case, X axis has dates
+ #X, Y = np.meshgrid(dates, y)
+
+ rows = len(X)
+ cols = len(X[0])
+
+ z1D = np.arange(rows * cols)
+ Z = z1D.reshape((rows, cols))
+
fig, ax = plt.subplots()
- ax.clabel(...)
+ CS = ax.contour(X, Y, Z)
+
+ ax.clabel(CS, CS.levels, inline=True, fmt=dict(zip(CS.levels, dates)))
@pytest.mark.xfail(reason="Test for contour not written yet")
@mpl.style.context("default")
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