zulip/frontend_tests/zjsunit/stub.js

46 lines
1.1 KiB
JavaScript

const _ = require('underscore/underscore.js');
// Stubs don't do any magical modifications to your namespace. They
// just provide you a function that records what arguments get passed
// to it. To use stubs as something more like "spies," use something
// like set_global() to override your namespace.
exports.make_stub = function () {
const self = {};
self.num_calls = 0;
self.f = function () {
self.last_call_args = _.clone(arguments);
self.num_calls += 1;
return true;
};
self.get_args = function () {
const param_names = arguments;
const result = {};
_.each(param_names, function (name, i) {
result[name] = self.last_call_args[i];
});
return result;
};
return self;
};
exports.with_stub = function (f) {
const stub = exports.make_stub();
f(stub);
assert.equal(stub.num_calls, 1);
};
(function test_ourselves() {
exports.with_stub(function (stub) {
stub.f('blue', 42);
const args = stub.get_args('color', 'n');
assert.equal(args.color, 'blue');
assert.equal(args.n, 42);
});
}());