How to ues npm.commands.test function

Question

I would like to create a function that can return the result by npm test.

(by call this function npm.commands.test(packages, callback) https://docs.npmjs.com/api/test)

I tried to use that like this:

var npm = require("npm");
npm.load('', function(err, npm) {
  npm.commands.test('package.json', function(data) {
  });
});

It could run such as command npm test, but I don't know how to get the result? and what is the callback function like?

remolueoend · Accepted Answer · 2015-07-04 16:54:04Z

1

npm.commands.test executes the test command defined in the package.json file of the current project. Additionally, npm.commands.test redirects the first parameter to the test command.

Example

package.json:

{
    ...
    "scripts": {
        "test": "mocha"
    }
    ...
}

code:

var npm = require('npm');
...
npm.commands.test('myTestDirectory', function(err){
    // if one of more tests failed, err will be set to the string:
    // 'Test failed.  See above for more details.'
    // Else, err will be undefined.
});

calls:

/path/to/project/root> mocha "myTestDirectory"

In some situations, especially if you want to execute tests of another project or package, it probably makes more sense to use the child_process module to spawn a new process of npm test and access the output over the process' stderr and stdout streams or call the test runner of the particular project directly.

edited Jul 4, 2015 at 16:54

answered Jul 4, 2015 at 16:03

remolueoend

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