From 6571e6548e52b8292e40bfb2c7a2090be9aca18a Mon Sep 17 00:00:00 2001
From: Ethan Zheng <77181471+EthanZheng11@users.noreply.github.com>
Date: Sat, 9 Dec 2023 23:05:57 +0000
Subject: [PATCH 1/5] Added datetime test for tricontourf.

---
 lib/matplotlib/tests/test_datetime.py | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/lib/matplotlib/tests/test_datetime.py b/lib/matplotlib/tests/test_datetime.py
index 3c8cc8b5b8bb..227c94c0cd91 100644
--- a/lib/matplotlib/tests/test_datetime.py
+++ b/lib/matplotlib/tests/test_datetime.py
@@ -737,8 +737,26 @@ def test_tricontour(self):
     @pytest.mark.xfail(reason="Test for tricontourf not written yet")
     @mpl.style.context("default")
     def test_tricontourf(self):
+        mpl.rcParams["date.converter"] = "concise"
         fig, ax = plt.subplots()
-        ax.tricontourf(...)
+        
+        np.random.seed(11)
+        limit_value = 30
+        test_date = datetime.datetime(2023, 10, 1)
+
+        x_dates = np.array(
+            [datetime.datetime(2023, 10, n) for n in range(1, limit_value)]
+        )
+
+        x_dates_converted = mpl.dates.date2num(x_dates)
+
+        y_data = np.random.rand(limit_value - 1)
+
+        z_data = np.sin(x_dates_converted) + np.cos(y_data)
+
+        triangulation = mpl.tri.Triangulation(x_dates_converted, y_data)   
+
+        ax.tricontourf(triangulation, z_data)
 
     @pytest.mark.xfail(reason="Test for tripcolor not written yet")
     @mpl.style.context("default")

From 67b567d4254b0fdd740f277524c53bc003e69c15 Mon Sep 17 00:00:00 2001
From: Ethan Zheng <77181471+EthanZheng11@users.noreply.github.com>
Date: Sat, 9 Dec 2023 23:07:24 +0000
Subject: [PATCH 2/5] Removed pytest mark xfail from tricontourf test.

---
 lib/matplotlib/tests/test_datetime.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/lib/matplotlib/tests/test_datetime.py b/lib/matplotlib/tests/test_datetime.py
index 227c94c0cd91..4d6a387e851e 100644
--- a/lib/matplotlib/tests/test_datetime.py
+++ b/lib/matplotlib/tests/test_datetime.py
@@ -734,7 +734,6 @@ def test_tricontour(self):
         fig, ax = plt.subplots()
         ax.tricontour(...)
 
-    @pytest.mark.xfail(reason="Test for tricontourf not written yet")
     @mpl.style.context("default")
     def test_tricontourf(self):
         mpl.rcParams["date.converter"] = "concise"

From e594dd37b1c64ed06958f141d5568d3513946f6b Mon Sep 17 00:00:00 2001
From: Ethan Zheng <77181471+EthanZheng11@users.noreply.github.com>
Date: Sat, 9 Dec 2023 23:22:44 +0000
Subject: [PATCH 3/5] Corrected flake8 linting errors.

---
 lib/matplotlib/tests/test_datetime.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/matplotlib/tests/test_datetime.py b/lib/matplotlib/tests/test_datetime.py
index 4d6a387e851e..2a4622c5c185 100644
--- a/lib/matplotlib/tests/test_datetime.py
+++ b/lib/matplotlib/tests/test_datetime.py
@@ -738,7 +738,7 @@ def test_tricontour(self):
     def test_tricontourf(self):
         mpl.rcParams["date.converter"] = "concise"
         fig, ax = plt.subplots()
-        
+
         np.random.seed(11)
         limit_value = 30
         test_date = datetime.datetime(2023, 10, 1)
@@ -753,7 +753,7 @@ def test_tricontourf(self):
 
         z_data = np.sin(x_dates_converted) + np.cos(y_data)
 
-        triangulation = mpl.tri.Triangulation(x_dates_converted, y_data)   
+        triangulation = mpl.tri.Triangulation(x_dates_converted, y_data)
 
         ax.tricontourf(triangulation, z_data)
 

From 364163aebc4a3d99995770e02cc865505fe69337 Mon Sep 17 00:00:00 2001
From: Ethan Zheng <77181471+EthanZheng11@users.noreply.github.com>
Date: Sat, 9 Dec 2023 23:28:32 +0000
Subject: [PATCH 4/5] Modified seed number.

---
 lib/matplotlib/tests/test_datetime.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/matplotlib/tests/test_datetime.py b/lib/matplotlib/tests/test_datetime.py
index 2a4622c5c185..f705768ac28e 100644
--- a/lib/matplotlib/tests/test_datetime.py
+++ b/lib/matplotlib/tests/test_datetime.py
@@ -739,9 +739,8 @@ def test_tricontourf(self):
         mpl.rcParams["date.converter"] = "concise"
         fig, ax = plt.subplots()
 
-        np.random.seed(11)
+        np.random.seed(19680801)
         limit_value = 30
-        test_date = datetime.datetime(2023, 10, 1)
 
         x_dates = np.array(
             [datetime.datetime(2023, 10, n) for n in range(1, limit_value)]

From 24666bd1d0c319b45114d7b8e498a0a5b9946387 Mon Sep 17 00:00:00 2001
From: Ethan Zheng <77181471+EthanZheng11@users.noreply.github.com>
Date: Sat, 9 Dec 2023 23:37:37 +0000
Subject: [PATCH 5/5] Removed triangulation variable.

---
 lib/matplotlib/tests/test_datetime.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/lib/matplotlib/tests/test_datetime.py b/lib/matplotlib/tests/test_datetime.py
index f705768ac28e..89c8a15b3dcd 100644
--- a/lib/matplotlib/tests/test_datetime.py
+++ b/lib/matplotlib/tests/test_datetime.py
@@ -752,9 +752,7 @@ def test_tricontourf(self):
 
         z_data = np.sin(x_dates_converted) + np.cos(y_data)
 
-        triangulation = mpl.tri.Triangulation(x_dates_converted, y_data)
-
-        ax.tricontourf(triangulation, z_data)
+        ax.tricontourf(x_dates_converted, y_data, z_data)
 
     @pytest.mark.xfail(reason="Test for tripcolor not written yet")
     @mpl.style.context("default")