chore: import upstream snapshot with attribution

tools/coverage/coverage_lines.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+usage: coverage_lines.py info_file expected
+"""
+
+import os
+import sys
+
+
+def get_lines(info_file):
+    """
+    Args:
+        info_file (str): File generated by lcov.
+
+    Returns:
+        float: Coverage rate.
+    """
+    hits = 0.0
+    total = 0.0
+
+    with open(info_file) as info_file:
+        for line in info_file:
+            line = line.strip()
+
+            if not line.startswith('DA:'):
+                continue
+
+            line = line[3:]
+
+            total += 1
+
+            if int(line.split(',')[1]) > 0:
+                hits += 1
+
+    if total == 0:
+        print('no data found')
+        sys.exit()
+
+    return hits / total
+
+
+if __name__ == '__main__':
+    if len(sys.argv) < 3:
+        sys.exit()
+
+    info_file = sys.argv[1]
+    expected = float(sys.argv[2])
+
+    if not os.path.isfile(info_file):
+        print(f'info file {info_file} is not exists, ignored')
+        sys.exit()
+
+    actual = get_lines(info_file)
+    actual = round(actual, 3)
+
+    if actual < expected:
+        print(
+            f'expected >= {round(expected * 100, 1)} %, actual {round(actual * 100, 1)} %, failed'
+        )
+
+        sys.exit(1)
+
+    print(
+        f'expected >= {round(expected * 100, 1)} %, actual {round(actual * 100, 1)} %, passed'
+    )