Add coverage

tools/telemetry/third_party/coverage/tests/test_pickle2json.py

+# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
+# For details: https://bitbucket.org/ned/coveragepy/src/default/NOTICE.txt
+
+"""Tests for coverage.pickle2json"""
+
+from coverage.backward import pickle, iitems
+from coverage.data import CoverageData
+from coverage.pickle2json import pickle2json
+
+from tests.coveragetest import CoverageTest
+from tests.test_data import DataTestHelpers, LINES_1, ARCS_3
+
+
+class Pickle2JsonTestInTempDir(DataTestHelpers, CoverageTest):
+    """Tests pickle2json.py."""
+
+    no_files_in_temp_dir = True
+
+    def write_pickled_file(self, covdata, filename):
+        """Write coverage data as pickled `filename`."""
+        # Create the file data.
+        file_data = {}
+
+        if covdata._arcs:
+            file_data['arcs'] = dict((f, list(amap)) for f, amap in iitems(covdata._arcs))
+        else:
+            file_data['lines'] = dict((f, list(lmap)) for f, lmap in iitems(covdata._lines))
+
+        # Write the pickle to the file.
+        with open(filename, 'wb') as file_obj:
+            pickle.dump(file_data, file_obj, 2)
+
+    def test_read_write_lines_pickle(self):
+        # Test the old pickle format.
+        covdata1 = CoverageData()
+        covdata1.add_lines(LINES_1)
+        self.write_pickled_file(covdata1, "lines.pkl")
+
+        pickle2json("lines.pkl", "lines.json")
+
+        covdata2 = CoverageData()
+        covdata2.read_file("lines.json")
+        self.assert_lines1_data(covdata2)
+
+    def test_read_write_arcs_pickle(self):
+        # Test the old pickle format.
+        covdata1 = CoverageData()
+        covdata1.add_arcs(ARCS_3)
+        self.write_pickled_file(covdata1, "arcs.pkl")
+
+        pickle2json("arcs.pkl", "arcs.json")
+
+        covdata2 = CoverageData()
+        covdata2.read_file("arcs.json")
+        self.assert_arcs3_data(covdata2)