zulip/frontend_tests/node_tests/util.js

add_dependencies({
    util: 'js/util.js'
});

var util = global.util;
var _ = global._;

(function test_CachedValue() {
    var x = 5;

    var cv = new util.CachedValue({
        compute_value: function () {
            return x * 2;
        }
    });

    assert.equal(cv.get(), 10);

    x = 6;
    assert.equal(cv.get(), 10);
    cv.reset();
    assert.equal(cv.get(), 12);

}());

(function test_lower_bound() {
    var arr = [10, 20, 30, 40, 50];
    assert.equal(util.lower_bound(arr, 5), 0);
    assert.equal(util.lower_bound(arr, 10), 0);
    assert.equal(util.lower_bound(arr, 15), 1);
    assert.equal(util.lower_bound(arr, 50), 4);
    assert.equal(util.lower_bound(arr, 55), 5);
    assert.equal(util.lower_bound(arr, 2, 4, 31), 3);

    arr = [{x: 10}, {x: 20}, {x:30}];

    function compare (a, b) {
        return a.x < b;
    }

    assert.equal(util.lower_bound(arr, 5, compare), 0);
    assert.equal(util.lower_bound(arr, 10, compare), 0);
    assert.equal(util.lower_bound(arr, 15, compare), 1);

}());

(function test_same_recipient() {
    _.each([util.same_recipient, util.same_major_recipient], function (same) {
        assert(same(
            {type: 'stream', stream: 'Foo', subject: 'Bar'},
            {type: 'stream', stream: 'fOO', subject: 'bar'}
        ));

        assert(!same(
            {type: 'stream', stream: 'Foo', subject: 'Bar'},
            {type: 'stream', stream: 'yo', subject: 'whatever'}
        ));

        assert(same(
            {type: 'private', reply_to: 'fred@zulip.com,melissa@zulip.com'},
            {type: 'private', reply_to: 'fred@zulip.com,melissa@zulip.com'}
        ));

        assert(!same(
            {type: 'private', reply_to: 'fred@zulip.com'},
            {type: 'private', reply_to: 'Fred@zulip.com'}
        ));

        assert(!same(
            {type: 'stream', stream: 'Foo', subject: 'Bar'},
            {type: 'private', reply_to: 'Fred@zulip.com'}
        ));
    });

    assert(util.same_major_recipient(
        {type: 'stream', stream: 'Foo', subject: 'sub1'},
        {type: 'stream', stream: 'fOO', subject: 'sub2'}
    ));

    assert(!util.same_recipient(
        {type: 'stream', stream: 'Foo', subject: 'sub1'},
        {type: 'stream', stream: 'fOO', subject: 'sub2'}
    ));

}());

(function test_robust_uri_decode() {
    assert.equal(util.robust_uri_decode('xxx%3Ayyy'), 'xxx:yyy');
    assert.equal(util.robust_uri_decode('xxx%3'), 'xxx');
}());


(function test_array_compare() {
    assert(util.array_compare([], []));
    assert(util.array_compare([1,2,3], [1,2,3]));
    assert(!util.array_compare([1,2], [1,2,3]));
    assert(!util.array_compare([1,2,3], [1,2]));
    assert(!util.array_compare([1,2,3,4], [1,2,3,5]));
}());

(function test_normalize_recipients() {
    assert(util.normalize_recipients(' bob@foo.com, alice@foo.com '), 'alice@foo.com,bob@foo.com');
}());

(function test_random_int() {
    var min = 0;
    var max = 100;

    _.times(500, function () {
        var val = util.random_int(min, max);
        assert(min <= val);
        assert(val <= max);
        assert.equal(val, Math.floor(val));
    });
}());

(function test_enforce_arity() {
    function f1() {}
    var eaf1 = util.enforce_arity(f1);

    assert.doesNotThrow(function () { f1('foo'); });
    assert.doesNotThrow(function () { eaf1(); });
    assert.throws(function () { eaf1('foo'); }, /called with \d+ arguments/);
    assert.throws(function () { eaf1('foo', 'bar'); }, /called with \d+ arguments/);

    function f2(x) {}
    var eaf2 = util.enforce_arity(f2);

    assert.doesNotThrow(function () { f2(); });
    assert.doesNotThrow(function () { eaf2('foo'); });
    assert.throws(function () { eaf2(); }, /called with \d+ arguments/);
    assert.throws(function () { eaf2('foo', 'bar'); }, /called with \d+ arguments/);

    function f3(x, y) {}
    var eaf3 = util.enforce_arity(f3);

    assert.doesNotThrow(function () { f3(); });
    assert.doesNotThrow(function () { eaf3('foo', 'bar'); });
    assert.throws(function () { eaf3(); }, /called with \d+ arguments/);
    assert.throws(function () { eaf3('foo'); }, /called with \d+ arguments/);
    assert.throws(function () { eaf3('foo','bar', 'baz'); }, /called with \d+ arguments/);
}());