fix: don't create a data file when just trying to read one. #13286.4

3 files changed, 9 insertions, 0 deletions

diff --git a/tests/test_data.py b/tests/test_data.py
index 9f9a92bd..3cb519ca 100644
--- a/tests/test_data.py
+++ b/tests/test_data.py
@@ -118,6 +118,13 @@ class CoverageDataTest(CoverageTest):
     def test_empty_data_is_false(self):
         covdata = DebugCoverageData()
         assert not covdata
+        self.assert_doesnt_exist(".coverage")
+
+    def test_empty_data_is_false_when_read(self):
+        covdata = DebugCoverageData()
+        covdata.read()
+        assert not covdata
+        self.assert_doesnt_exist(".coverage")
 
     def test_line_data_is_true(self):
         covdata = DebugCoverageData()
diff --git a/tests/test_summary.py b/tests/test_summary.py
index 4bce80f6..d603062b 100644
--- a/tests/test_summary.py
+++ b/tests/test_summary.py
@@ -450,6 +450,7 @@ class SummaryTest(UsingModulesMixin, CoverageTest):
         cov.load()
         with pytest.raises(NoDataError, match="No data to report."):
             self.get_report(cov, skip_covered=True)
+        self.assert_doesnt_exist(".coverage")
 
     def test_report_skip_empty(self):
         self.make_file("main.py", """
diff --git a/tests/test_xml.py b/tests/test_xml.py
index 1e94dfa2..fda11087 100644
--- a/tests/test_xml.py
+++ b/tests/test_xml.py
@@ -139,6 +139,7 @@ class XmlReportTest(XmlTestHelpers, CoverageTest):
         with pytest.raises(NoDataError, match="No data to report."):
             self.run_xml_report()
         self.assert_doesnt_exist("coverage.xml")
+        self.assert_doesnt_exist(".coverage")
 
     def test_no_source(self):
         # Written while investigating a bug, might as well keep it.