Add test for a warning in the same location raised by parametrized tasks.

Author: tobiasraabe

docs/source/changes.md

@@ -11,6 +11,8 @@ releases are available on [PyPI](https://pypi.org/project/pytask) and
 - {pull}`277` ignores `DeprecationWarning` and `PendingDeprecationWarning` by default.
   Previously, they were enabled, but they should be shown when testing the project with
   pytest, not after the execution with pytask. Fixes {issue}`269`.
+- {pull}`278` counts multiple occurrences of a warning instead of listing the module or
+  task name again and again. Fixes {issue}`270`.
 
 ## 0.2.2 - 2022-05-14
 

tests/test_warnings.py

@@ -155,3 +155,24 @@ def warn_now():
     assert result.returncode == ExitCode.OK
     assert "Warnings" not in result.stdout.decode()
     assert "warning!!!" not in result.stdout.decode()
+
+
+def test_multiple_occurrences_of_warning(tmp_path, runner):
+    source = """
+    import warnings
+    import pytask
+
+    for i in range(10):
+
+        @pytask.mark.task
+        def task_example():
+            warnings.warn("warning!!!")
+    """
+    tmp_path.joinpath("task_example.py").write_text(textwrap.dedent(source))
+
+    result = runner.invoke(cli, [tmp_path.as_posix()])
+
+    assert result.exit_code == ExitCode.OK
+    assert "Warnings" in result.output
+    assert "warning!!!" in result.output
+    assert result.output.count("task_example") == 41