/
dependencies-test.js
264 lines (218 loc) · 6.13 KB
/
dependencies-test.js
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const { assert } = require('chai');
const getLoader = require('../dependencies');
const components = require('../components');
describe('Dependency logic', function () {
/** @type {import("../dependencies").Components} */
const components = {
languages: {
'a': {
alias: 'a2'
},
'b': {
alias: 'b2'
},
'c': {
require: 'a',
optional: ['b', 'e']
},
'd': {
require: ['c', 'b'],
alias: 'xyz'
},
},
pluginsOrSomething: {
'e': {
modify: 'a'
},
}
};
/**
* Returns the ids of `getLoader`.
*
* @param {string[]} load
* @param {string[]} [loaded]
* @returns {string[]}
*/
function getIds(load, loaded) {
return getLoader(components, load, loaded).getIds();
}
describe('Returned ids', function () {
it('- should load requirements', function () {
assert.sameMembers(getIds(['d']), ['a', 'b', 'c', 'd']);
});
it('- should not load already loaded requirements if not necessary', function () {
assert.sameMembers(getIds(['d'], ['a', 'b']), ['c', 'd']);
});
it('- should load already loaded requirements if requested', function () {
assert.sameMembers(getIds(['a', 'd'], ['a', 'b']), ['a', 'c', 'd']);
});
it('- should reload modified components', function () {
assert.sameMembers(getIds(['e'], ['a', 'b', 'c', 'd']), ['a', 'c', 'd', 'e']);
});
it('- should work with empty load', function () {
assert.sameMembers(getIds([], ['a', 'b', 'c', 'd']), []);
});
it('- should return unknown ids as is', function () {
assert.sameMembers(getIds(['c', 'foo'], ['bar']), ['foo', 'c', 'a']);
});
it('- should throw on unknown dependencies', function () {
assert.throws(() => {
/** @type {import("../dependencies").Components} */
const circular = {
languages: {
a: {
require: 'c'
},
b: 'B'
}
};
getLoader(circular, ['a']).getIds();
});
});
});
describe('Load order', function () {
// Note: The order of a and b isn't defined, so don't add any test with both of them being loaded here
it('- should load components in the correct order (require)', function () {
assert.deepStrictEqual(getIds(['c']), ['a', 'c']);
});
it('- should load components in the correct order (modify)', function () {
assert.deepStrictEqual(getIds(['e', 'a']), ['a', 'e']);
});
it('- should load components in the correct order (optional)', function () {
assert.deepStrictEqual(getIds(['c', 'b'], ['a']), ['b', 'c']);
});
it('- should load components in the correct order (require + optional)', function () {
assert.deepStrictEqual(getIds(['d'], ['a']), ['b', 'c', 'd']);
});
it('- should load components in the correct order (require + modify + optional)', function () {
assert.deepStrictEqual(getIds(['d', 'e'], ['b']), ['a', 'e', 'c', 'd']);
});
});
describe('Aliases', function () {
it('- should resolve aliases in the list of components to load', function () {
assert.sameMembers(getIds(['xyz']), ['a', 'b', 'c', 'd']);
});
it('- should resolve aliases in the list of loaded components', function () {
assert.sameMembers(getIds(['d'], ['a', 'a2', 'b2']), ['c', 'd']);
});
it('- should throw on duplicate aliases', function () {
assert.throws(() => {
/** @type {import("../dependencies").Components} */
const circular = {
languages: {
a: {
alias: 'c'
},
b: {
alias: 'c'
}
}
};
getLoader(circular, ['a', 'foo' /* force the lazy alias resolver */]).getIds();
});
});
it('- should throw on aliases which are components', function () {
assert.throws(() => {
/** @type {import("../dependencies").Components} */
const circular = {
languages: {
a: {
alias: 'b'
},
b: 'B'
}
};
getLoader(circular, ['a', 'foo' /* force the lazy alias resolver */]).getIds();
});
});
});
describe('Circular dependencies', function () {
it('- should throw on circular dependencies', function () {
assert.throws(() => {
/** @type {import("../dependencies").Components} */
const circular = {
languages: {
a: {
require: 'b'
},
b: {
optional: 'a'
}
}
};
getLoader(circular, ['a']).getIds();
});
});
});
describe('Async loading', function () {
it('- should load components in the correct order', async function () {
/** @type {import("../dependencies").Components} */
const localComponents = {
languages: {
'a': {},
'b': {
require: 'a'
},
'c': {
require: 'b'
}
}
};
/** @type {string[]} */
const actualLoadOrder = [];
/** @type {string[]} */
const actualResolveOrder = [];
/**
*
* @param {string} id
* @returns {Promise<void>}
*/
function loadComp(id) {
actualLoadOrder.push(id);
// the idea is that the components which have to be loaded first, take the longest, so if all were to
// start getting loaded at the same time, their order would be the reverse of the expected order.
let delay;
if (id === 'a') {
delay = 30;
} else if (id === 'b') {
delay = 20;
} else if (id === 'c') {
delay = 10;
}
return new Promise((resolve) => {
setTimeout(() => {
actualResolveOrder.push(id);
resolve();
}, delay);
});
}
const loader = getLoader(localComponents, ['c']);
await loader.load(id => loadComp(id), {
series: async (before, after) => {
await before;
await after();
},
parallel: async (values) => {
await Promise.all(values);
}
});
assert.deepStrictEqual(actualLoadOrder, ['a', 'b', 'c'], 'actualLoadOrder:');
assert.deepStrictEqual(actualResolveOrder, ['a', 'b', 'c'], 'actualResolveOrder:');
});
});
});
describe('components.json', function () {
it('- should be valid', function () {
try {
const allIds = [];
for (const category in components) {
Object.keys(components[category]).forEach(id => allIds.push(id));
}
// and an alias, so we force the lazy alias resolver to check all aliases
allIds.push('js');
getLoader(components, allIds).getIds();
} catch (error) {
assert.fail(error.toString());
}
});
});