什么是testcli，Command line application testing helpers
This is a small test helper that is designed to be used with Mocha and provides the ability to test that a command-line tool (that generally creates files, generates output, etc) is behaving as expected. I’ve written a few node command-line applications and testing them has proven to be tedious, so this tool has been written to assist with the process.
A test for TestCLI starts with a directory. In that directory is a
command file which contains the command that will be passed to child_process.exec and run.
Once the command has completed, TestCLI will then proceed to check that expected results match the actual results. How does it do this? Well it looks for files / folders that start with the word
expected-. For instance, the following is an example folder structure that is used in the Interleave tests:
- simple-build |- command |- src/ |- expected-dist/
Now, Interleave is a build tool that typically creates a
dist folder with a number of files that have been “built”. The
expected-dist folder in the directory indicates to TestCLI that it should expect to find a
dist folder after the command has completed. In fact TestCLI is pretty aggressive in this regard, and if you specify an
expected-foo folder in your test directory, it will rimraf any existing
foo directory out of there before running the command (so don’t put anything important in there, and ideally exclude them from version control).
If a file in the
expected-foo folder does not exist (deep nesting supported) in the generated
foo folder output, then this will result in an error condition. Unexpected files in the
foo folder will not constitute a failure but a warning will be reported.
For some samples, have a look in the
test folder of this repo.
Copyright © 2016 Damon Oehlman firstname.lastname@example.org
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