calmjs.dev 2.3.0

Alternative installation methods (for developers, advanced users)

Development is still ongoing with calmjs.dev, for the latest features and bug fixes, the development version may be desirable. However, in order for the source installation to function correctly, the calmjs package must be available in the current environment for all the package metadata be correctly generated. With recent versions of pip and setuptools that correctly support the setup_requires keyword, the following command should ensure that calmjs be available before pip attempts to set up this package. The latest development version of this package may be installed using:

$ pip install git+https://github.com/calmjs/calmjs.dev.git#egg=calmjs.dev

Or alternatively, clone the git repository manually and run the command manually, e.g.:

$ git clone https://github.com/calmjs/calmjs.dev.git
$ cd calmjs.dev
$ pip install -e .

Failing to have calmjs be available before the source installation of calmjs.dev will result in the critical Node.js dependencies not being defined correctly for this package. This may be corrected by regenerating them using the following at the root of this source based installation:

$ python setup.py egg_info

If no error message that indicate the failure to usage of certain keywords, run the tests (documented in the next section) to be sure that the package is functioning correctly.

Installation of Node.js external dependencies

As this package integrates a number of Node.js packages to achieve the intended functionality of integration with that environment, Node.js packages required by this package can be installed into the current working directory through the calmjs executable with the included npm command:

$ calmjs npm --install calmjs.dev

Testing the installation

Finally, to verify for the successful installation of calmjs.dev, the included tests may be executed through this command:

$ python -m unittest calmjs.dev.tests.make_suite

However, if the steps to install external Node.js dependencies to the current directory was followed, the current directory may be specified as the CALMJS_TEST_ENV environment variable. Under POSIX compatible shells this may be executed instead from within that directory:

$ CALMJS_TEST_ENV=. python -m unittest calmjs.dev.tests.make_suite

Do note a number of failures during execution of Karma may appear; this is normal as these are tests that involve the simulation of failures to ensure proper error handling on real test failures.

With RequireJS

For instance, a developer might execute the r.js tool through calmjs.rjs for creation of an AMD bundle from their Python project using a command such as:

$ calmjs rjs example.package

The above command would package all the JavaScript code provided by the Python package example.package into an AMD bundle artifact through r.js. As the example.package may also provide tests for its JavaScript code (naturally written in JavaScript), it may be executed through the karma test runner provided by the selected package. The command is as simple as adding karma before the toolchain runtime, like:

$ calmjs karma rjs example.package

This would apply a test advice to the rjs toolchain runtime and invoke it. Normally, before the bundling is done, the tests will be executed against the transpiled sources in the build directory. Note that the test advice is also implemented by calmjs.rjs to ensure that this testing workflow is properly integrated.

With webpack

Likewise for calmjs.webpack, where its support for webpack is also provided through a similar mechanism such that the following command will execute the tests for the package through the typical webpack method of karma invocation:

$ calmjs karma webpack example.package

Skip artifact building

If the generation of the artifact or bundle file after testing concludes (whether success or failure) is not desired, the -T or the --only-test flag may be applied to the karma command like so:

$ calmjs karma -T webpack example.package
$ calmjs karma --only-test rjs example.package

Easily test the generated bundle artifact using existing tests

To run tests against pre-generated artifact files, calmjs.dev provides a surrogate toolchain runtime specific for the karma command that may be used to achieve this purpose. For example, given an artifact file (e.g. bundle.js), it is possible to test whether it correctly included JavaScript code generated/provided by example.package using tests provided by the same package with the following command:

$ calmjs karma run \
    --artifact=bundle.js \
    --test-with-package=example.package

However, for more complicated toolchains and packages this will probably not work, as the generation of these artifacts typically involve extra optional advices that have been added. To address that, one may apply the --toolchain-package flag which serves a similar purpose as the --optional-advice flag for certain toolchains. For calmjs.rjs, this is necessary. The full command may be like so:

$ calmjs karma run \
    --artifact=bundle.js \
    --test-with-package=example.package \
    --toolchain-package=calmjs.rjs

Likewise for webpack; if the selected artifact file is generated through calmjs webpack, it may be tested using the following:

$ calmjs karma run \
    --artifact=bundle.js \
    --test-with-package=example.package \
    --toolchain-package=calmjs.webpack

As with all calmjs tools, more help can be acquired by appending -h or --help to each of the runtime commands, i.e. calmjs karma -h or calmjs karma run -h. Replacing the -h flag with -V will report the version information for the underlying packages associated with the respective runtime used.

More on testing in conjunction with artifacts

The --artifact flag can also be specified directly on the karma runner; this has the consequence of enabling the testing of limited or explicitly mapped JavaScript sources exported by specific Python modules. What this means is that instead of building and testing all the dependency modules along with a given module, all those dependencies can be applied to the test environment as a separate, complete artifact. This has the effect of removing the dependency sources from the build directory such that coverage report no longer shows up, with the bonus of also testing the artifact whether or not the it is compatible with the sources being tested. An example with the nunja.stock package which requires nunja:

$ calmjs rjs nunja
$ calmjs karma --coverage --artifact=nunja.js --cover-test \
    rjs nunja.stock --sourcepath-method=explicit

The first command produces the artifact file nunja.js, which is then immediately used by the subsequent command which explicitly filters out all other sources not specified. Otherwise, the standard way is that the dependencies will also be included into the test and the resulting artifact file. The --cover-test flag denotes that the test coverage reporting should be extended to the tests provided. Similarly, enabling the --cover-artifact flag will extend coverage reporting to the artifacts included for the test run.

Testing of prebuilt artifacts defined for packages

Package level artifacts defined and generated through the tools that make use of the calmjs.artifacts registry system may be tested using the calmjs artifact karma tool if the artifact entry in the calmjs.artifacts registry also has a corresponding entry in the calmjs.artifacts.tests registry. Typically, the module that the entry point references for the artifact entry will be documented by the toolchain package that supplied the builder entry. If the artifacts in the package to be tested are created and the package has well-defined entries suitable for testing purpose, the following command may be executed to test the defined and generated artifacts:

$ calmjs artifact karma example.package

There are cases where the test execution may require sourcing tests from other packages; this use case is especially valid for dependent packages where their developer want to ensure that the changes they may have made to their dependencies through the extensions they developed and provided by their packages have no negative impact to existing functionality. This functionality is implemented by the --test-with-package flag, which may be used to specify which package the artifact should source the tests from.

$ calmjs artifact karma example.package \
    --test-with-package example.dependent

The above command will use karma to execute tests provided by the example.dependent package against the artifacts defined for example.package. If the artifacts were correctly built, with no new code breaking existing functionality that was provided by the example.dependent package, all tests should pass.

Note that --test-with-package flag overrides the list of source packages that will provide the tests to be tested against the artifact.

If additional artifacts are required before the inclusion of the package artifact into the test runner (e.g. testing for possible conflicts that artifacts may introduce to the package artifact), they may be specified using the --artifact flag; specified artifacts will be prepended to the list of artifacts provided by the builder for the test execution.

Error: No provider for “framework:mocha”! (Resolving: framework:mocha)

The most likely cause of this error is that the npm dependencies specified for this package is not available for the current Node.js environment. Please ensure that is installed before trying again. One method is to prepend calmjs.dev to the calmjs npm install command, e.g:

$ calmjs npm --install calmjs.dev ...

Alternatively, package developers can have extras that requires this package, and instruct downstream users interested in the development of that package to install and use the package with that extras flag enabled. For instance, nunja has the support for that:

$ calmjs npm --install nunja[dev]

ERROR [plugin]: “karma-…” plugin: …

A message specific to some plugin may result in the test runner not being able to execute any test. This is typically caused by certain versions of karma test runner not being able to cleanly deal with misbehaving plugins that is available in the node_modules directory. If the plugin shown inside the quote (starting with karma-) is unnecessary for the execution of tests, it should be removed and the test command should be executed again.

UserWarning: Unknown distribution option: ‘package_json’

Installation using the development method will show the above message if calmjs was not already installed into the current environment. Please either reinstall, or regenerate the metadata by running:

$ python setup.py egg_info

In the root of the calmjs.dev source directory to ensure correct behavior of this package.