Coverage merger for the Google Closure Compiler. Merges multiple coverage objects stored in JSON files and outputs them as a single JSON or LCOV report.
Run npm install closure-coverage-merger to install the merger including dependencies. Preferred way is to install globally.
The Google Closure Compiler is able to instrument the compiled source code to gather coverage. This adds a field __jscov to the window object, which can be read and serialized to a JSON file after a test case run.
This script reads in such JSON files, combines the contained coverage, and outputs the results as JSON representation or LCOV report.
usage: closure-coverage-merger [-h] [-v] [-o OUTPUT] -i INPUT [INPUT ...]
[-x EXCLUDES] [-e ENCODING] [-f {lcov,json}]
Coverage merger for the Google Closure Compiler. Merges multiple coverage
objects stored in JSON files and outputs them as a single JSON or LCOV report.
Optional arguments:
-h, --help Show this help message and exit.
-v, --version Show program's version number and exit.
-o OUTPUT, --output OUTPUT
Name of the output file. Defaults to output.lcov
-i INPUT [INPUT ...], --input INPUT [INPUT ...]
Input files containing the coverage objects
-x EXCLUDES, --excludes EXCLUDES
Exclude coverage for specific filenames. Coverage
will not be processed for files whose filename
contains one of these strings. Defaults to
["closure-library:","generated","soyutils_usegoog"]
-e ENCODING, --encoding ENCODING
Encoding to use when reading coverage files. Defaults
to utf8
-f {lcov,json}, --format {lcov,json}
Format of the created report. Defaults to lcov
Theoretically, the Closure Compiler is able to instrument for statement and branch coverage. However, for now, this script only interprets the line coverage part.
Copyright 2018 Dennis Pagano
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.