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Diffstat (limited to 'test/unit/data/cacheable-object.js')
| -rw-r--r-- | test/unit/data/cacheable-object.js | 355 |
1 files changed, 355 insertions, 0 deletions
diff --git a/test/unit/data/cacheable-object.js b/test/unit/data/cacheable-object.js new file mode 100644 index 0000000..8c31a5b --- /dev/null +++ b/test/unit/data/cacheable-object.js @@ -0,0 +1,355 @@ +import t from 'tap'; + +import CacheableObject from '#cacheable-object'; + +function newCacheableObject(PD) { + return new (class extends CacheableObject { + static propertyDescriptors = PD; + }); +} + +t.test(`CacheableObject simple separate update & expose`, t => { + const obj = newCacheableObject({ + number: { + flags: { + update: true + } + }, + + timesTwo: { + flags: { + expose: true + }, + + expose: { + dependencies: ['number'], + compute: ({ number }) => number * 2 + } + } + }); + + t.plan(1); + obj.number = 5; + t.equal(obj.timesTwo, 10); +}); + +t.test(`CacheableObject basic cache behavior`, t => { + let computeCount = 0; + + const obj = newCacheableObject({ + string: { + flags: { + update: true + } + }, + + karkat: { + flags: { + expose: true + }, + + expose: { + dependencies: ['string'], + compute: ({ string }) => { + computeCount++; + return string.toUpperCase(); + } + } + } + }); + + t.plan(8); + + t.equal(computeCount, 0); + + obj.string = 'hello world'; + t.equal(computeCount, 0); + + obj.karkat; + t.equal(computeCount, 1); + + obj.karkat; + t.equal(computeCount, 1); + + obj.string = 'testing once again'; + t.equal(computeCount, 1); + + obj.karkat; + t.equal(computeCount, 2); + + obj.string = 'testing once again'; + t.equal(computeCount, 2); + + obj.karkat; + t.equal(computeCount, 2); +}); + +t.test(`CacheableObject combined update & expose (no transform)`, t => { + const obj = newCacheableObject({ + directory: { + flags: { + update: true, + expose: true + } + } + }); + + t.plan(2); + + obj.directory = 'the-world-revolving'; + t.equal(obj.directory, 'the-world-revolving'); + + obj.directory = 'chaos-king'; + t.equal(obj.directory, 'chaos-king'); +}); + +t.test(`CacheableObject combined update & expose (basic transform)`, t => { + const obj = newCacheableObject({ + getsRepeated: { + flags: { + update: true, + expose: true + }, + + expose: { + transform: value => value.repeat(2) + } + } + }); + + t.plan(1); + + obj.getsRepeated = 'dog'; + t.equal(obj.getsRepeated, 'dogdog'); +}); + +t.test(`CacheableObject combined update & expose (transform with dependency)`, t => { + const obj = newCacheableObject({ + customRepeat: { + flags: { + update: true, + expose: true + }, + + expose: { + dependencies: ['times'], + transform: (value, { times }) => value.repeat(times) + } + }, + + times: { + flags: { + update: true + } + } + }); + + t.plan(3); + + obj.customRepeat = 'dog'; + obj.times = 1; + t.equal(obj.customRepeat, 'dog'); + + obj.times = 5; + t.equal(obj.customRepeat, 'dogdogdogdogdog'); + + obj.customRepeat = 'cat'; + t.equal(obj.customRepeat, 'catcatcatcatcat'); +}); + +t.test(`CacheableObject validate on update`, t => { + const mockError = new TypeError(`Expected a string, not ${typeof value}`); + + const obj = newCacheableObject({ + directory: { + flags: { + update: true, + expose: true + }, + + update: { + validate: value => { + if (typeof value !== 'string') { + throw mockError; + } + return true; + } + } + }, + + date: { + flags: { + update: true, + expose: true + }, + + update: { + validate: value => (value instanceof Date) + } + } + }); + + let thrownError; + t.plan(6); + + obj.directory = 'megalovania'; + t.equal(obj.directory, 'megalovania'); + + t.throws( + () => { obj.directory = 25; }, + {cause: mockError}); + + t.equal(obj.directory, 'megalovania'); + + const date = new Date(`25 December 2009`); + + obj.date = date; + t.equal(obj.date, date); + + t.throws( + () => { obj.date = `TWELFTH PERIGEE'S EVE`; }, + {cause: TypeError}); + + t.equal(obj.date, date); +}); + +t.test(`CacheableObject transform on null value`, t => { + let computed = false; + + const obj = newCacheableObject({ + spookyFactor: { + flags: { + update: true, + expose: true, + }, + + expose: { + transform: value => { + computed = true; + return (value ? 2 * value : -1); + }, + }, + }, + }); + + t.plan(4); + + t.equal(obj.spookyFactor, -1); + t.ok(computed); + + computed = false; + obj.spookyFactor = 1; + + t.equal(obj.spookyFactor, 2); + t.ok(computed); +}); + +t.test(`CacheableObject don't transform on successful update`, t => { + let computed = false; + + const obj = newCacheableObject({ + original: { + flags: { + update: true, + expose: true, + }, + + update: { + validate: value => value.startsWith('track:'), + }, + + expose: { + transform: value => { + computed = true; + return (value ? value.split(':')[1] : null); + }, + }, + }, + }); + + t.plan(4); + + t.doesNotThrow(() => obj.original = 'track:foo'); + t.notOk(computed); + + t.equal(obj.original, 'foo'); + t.ok(computed); +}); + +t.test(`CacheableObject don't transform on failed update`, t => { + let computed = false; + + const obj = newCacheableObject({ + original: { + flags: { + update: true, + expose: true, + }, + + update: { + validate: value => value.startsWith('track:'), + }, + + expose: { + transform: value => { + computed = true; + return (value ? value.split(':')[1] : null); + }, + }, + }, + }); + + t.plan(4); + + t.throws(() => obj.original = 'album:foo'); + t.notOk(computed); + + t.equal(obj.original, null); + t.ok(computed); +}); + +t.test(`CacheableObject default update property value`, t => { + const obj = newCacheableObject({ + fruit: { + flags: { + update: true, + expose: true + }, + + update: { + default: 'potassium' + } + } + }); + + t.plan(1); + t.equal(obj.fruit, 'potassium'); +}); + +t.test(`CacheableObject default property throws if invalid`, t => { + const mockError = new TypeError(`Expected a string, not ${typeof value}`); + + t.plan(1); + + let thrownError; + + t.throws( + () => newCacheableObject({ + string: { + flags: { + update: true + }, + + update: { + default: 123, + validate: value => { + if (typeof value !== 'string') { + throw mockError; + } + return true; + } + } + } + }), + {cause: mockError}); +}); |