Add minimum example test case

Author: moshi4

tests/__init__.py

@@ -0,0 +1,27 @@
+from pathlib import Path
+
+import seaborn as sns
+
+import patchworklib as pw
+
+
+def test_example_plot(tmp_path: Path):
+    """Test example plot (Only check )"""
+    fmri = sns.load_dataset("fmri")
+    ax1 = pw.Brick(figsize=(3, 2))
+    sns.lineplot(
+        x="timepoint", y="signal", hue="region", style="event", data=fmri, ax=ax1
+    )
+    ax1.legend(bbox_to_anchor=(1.05, 1.0), loc="upper left")
+    ax1.set_title("ax1")
+
+    titanic = sns.load_dataset("titanic")
+    ax2 = pw.Brick(figsize=(1, 2))
+    sns.barplot(x="sex", y="survived", hue="class", data=titanic, ax=ax2)
+    ax2.move_legend(new_loc="upper left", bbox_to_anchor=(1.05, 1.0))
+    ax2.set_title("ax2")
+
+    result_file = tmp_path / "ax12.png"
+    ax12 = ax1 | ax2
+    ax12.savefig(result_file)
+    assert result_file.exists()