From 2094909df35db45ca7a409cc37f38d49c3191d2a Mon Sep 17 00:00:00 2001
From: Ned Batchelder <ned@nedbatchelder.com>
Date: Thu, 18 Nov 2021 06:16:55 -0500
Subject: fix: suffix=False will suppress the suffix even with multiprocessing.
 #989

---
 tests/test_api.py | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'tests/test_api.py')

diff --git a/tests/test_api.py b/tests/test_api.py
index 6b065709..a76fe3b9 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -1199,3 +1199,23 @@ class RelativePathTest(CoverageTest):
         assert files == {'foo.py', 'bar.py', os_sep('modsrc/__init__.py')}
         res = cov.report()
         assert res == 100
+
+    def test_combine_no_suffix_multiprocessing(self):
+        self.make_file(".coveragerc", """\
+            [run]
+            branch = True
+            """)
+        cov = coverage.Coverage(
+            config_file=".coveragerc",
+            concurrency="multiprocessing",
+            data_suffix=False,
+            )
+        cov.start()
+        cov.stop()
+        # The warning isn't the point of this test, but suppress it.
+        with pytest.warns(Warning) as warns:
+            cov.combine()
+        assert_coverage_warnings(warns, "No data was collected. (no-data-collected)")
+        cov.save()
+        self.assert_file_count(".coverage.*", 0)
+        self.assert_exists(".coverage")
-- 
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