Add test for _issue_warning_captured in cacheprovider.Cache.set

Author: Philipp Loose

testing/acceptance_test.py

@@ -1318,3 +1318,17 @@ def test_dummy():
     # with stacklevel=2 the warning originates from resultlog.pytest_configure
     # and is thrown when --result-log is used
     result.stdout.fnmatch_lines(["*resultlog.py:35*", "*--result-log is deprecated*"])
+
+
+def test_issue4445_cacheprovider_set(testdir):
+    """#4445: Make sure the warning points to a reasonable location
+    See origin of _issue_warning_captured at: _pytest.cacheprovider.py:59
+    """
+    testdir.tmpdir.join(".pytest_cache").write("something wrong")
+    result = testdir.runpytest()
+    # with stacklevel=3 the warning originates from one stacklevel above
+    # _issue_warning_captured in cacheprovider.Cache.set and is thrown
+    # when there are errors during cache folder creation
+    result.stdout.fnmatch_lines(
+        ["*cacheprovider.py:120*", "*could not create cache path*"]
+    )