1 files changed, 30 insertions, 0 deletions
diff --git a/tests/test_data.py b/tests/test_data.py
index 0549a3c..ef57f0c 100644
--- a/tests/test_data.py
+++ b/tests/test_data.py
@@ -1,5 +1,8 @@
 """Tests for coverage.data"""
 
+import os
+import shutil
+
 from coverage.backward import pickle
 from coverage.data import CoverageData
 from coverage.files import PathAliases
@@ -154,3 +157,30 @@ class DataTest(CoverageTest):
             covdata3, {'./a.py': 4, './sub/b.py': 2}, fullpath=True
             )
         self.assert_measured_files(covdata3, ['./a.py', './sub/b.py'])
+
+
+class DataTestInTempDir(DataTest):
+    """Test cases for coverage.data."""
+
+    run_in_temp_dir = True
+
+    def test_combining_from_different_directories(self):
+        covdata1 = CoverageData()
+        covdata1.add_line_data(DATA_1)
+        os.makedirs('cov1')
+        covdata1.write_file('cov1/.coverage.1')
+
+        covdata2 = CoverageData()
+        covdata2.add_line_data(DATA_2)
+        os.makedirs('cov2')
+        covdata2.write_file('cov2/.coverage.2')
+
+        covdata3 = CoverageData()
+        covdata3.combine_parallel_data(data_dirs=[
+            'cov1/',
+            'cov2/',
+            ])
+
+        self.assert_summary(covdata3, SUMMARY_1_2)
+        self.assert_measured_files(covdata3, MEASURED_FILES_1_2)
+