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'use strict';
var test = require('tape');
var getSideChannel = require('../');
test('getSideChannel', function (t) {
t.test('export', function (st) {
st.equal(typeof getSideChannel, 'function', 'is a function');
st.equal(getSideChannel.length, 0, 'takes no arguments');
var channel = getSideChannel();
st.ok(channel, 'is truthy');
st.equal(typeof channel, 'object', 'is an object');
st.end();
});
t.test('assert', function (st) {
var channel = getSideChannel();
st['throws'](
function () { channel.assert({}); },
TypeError,
'nonexistent value throws'
);
var o = {};
channel.set(o, 'data');
st.doesNotThrow(function () { channel.assert(o); }, 'existent value noops');
var accessed = false;
var trap = {};
Object.defineProperty(trap, 'foo', {
enumerable: true,
get: function () {
accessed = true;
return 1;
}
});
st['throws'](
function () { channel.assert(trap); },
TypeError,
'missing object key throws'
);
st.equal(accessed, false, 'a missing object key is not observably accessed');
st.end();
});
t.test('has', function (st) {
var channel = getSideChannel();
/** @type {unknown[]} */ var o = [];
st.equal(channel.has(o), false, 'nonexistent value yields false');
channel.set(o, 'foo');
st.equal(channel.has(o), true, 'existent value yields true');
st.equal(channel.has('abc'), false, 'non object value non existent yields false');
channel.set('abc', 'foo');
st.equal(channel.has('abc'), true, 'non object value that exists yields true');
st.end();
});
t.test('get', function (st) {
var channel = getSideChannel();
var o = {};
st.equal(channel.get(o), undefined, 'nonexistent value yields undefined');
var data = {};
channel.set(o, data);
st.equal(channel.get(o), data, '"get" yields data set by "set"');
st.end();
});
t.test('set', function (st) {
var channel = getSideChannel();
var o = function () {};
st.equal(channel.get(o), undefined, 'value not set');
channel.set(o, 42);
st.equal(channel.get(o), 42, 'value was set');
channel.set(o, Infinity);
st.equal(channel.get(o), Infinity, 'value was set again');
var o2 = {};
channel.set(o2, 17);
st.equal(channel.get(o), Infinity, 'o is not modified');
st.equal(channel.get(o2), 17, 'o2 is set');
channel.set(o, 14);
st.equal(channel.get(o), 14, 'o is modified');
st.equal(channel.get(o2), 17, 'o2 is not modified');
st.end();
});
t.test('delete', function (st) {
var channel = getSideChannel();
var o = {};
st.equal(channel['delete']({}), false, 'nonexistent value yields false');
channel.set(o, 42);
st.equal(channel.has(o), true, 'value is set');
st.equal(channel['delete']({}), false, 'nonexistent value still yields false');
st.equal(channel['delete'](o), true, 'deleted value yields true');
st.equal(channel.has(o), false, 'value is no longer set');
st.end();
});
t.end();
});
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