60 lines
2.1 KiB
JavaScript
60 lines
2.1 KiB
JavaScript
import assert from 'assert'
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import poortf from '../poortf.js'
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describe('poortf', () => {
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const slate = poortf('slate')
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it('creates an empty tf', () => {
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assert.throws(() => slate('empty'), TypeError)
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assert.throws(() => slate('empty'), /slate.*empty/)
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})
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const add = poortf('add', [
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[args => Array.from(args).every(a => typeof a === 'number'),
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(a, b) => a+b],
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[args => Array.from(args).every(a => typeof a === 'boolean'),
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(p, q) => p || q]
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])
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it('creates a tf with initial behaviors', () => {
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assert.strictEqual(add(2,2), 4)
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assert.strictEqual(add(true, false), true)
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assert.throws(() => add('kilroy'), TypeError)
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})
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const defNumber = what => {
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slate.addImps([args => typeof args[0] === 'number',
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n => 'I am not number ' + (what+n)],
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defNumber, what+1)
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}
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it('extends an empty tf', () => {
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defNumber(2)
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assert.strictEqual(slate(0, 'was here'), 'I am not number 2')
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assert.throws(() => slate('Kilroy', 'was here'), TypeError)
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slate.addImps([
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[args => typeof args[0] === 'string', s => s + ' wuz here'],
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[args => typeof args[0] === 'boolean', () => 'Maybe I am a number']
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])
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assert.strictEqual(slate('Kilroy', 'was here'), 'Kilroy wuz here')
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assert.strictEqual(slate(true), 'Maybe I am a number')
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assert.throws(() => slate(['Ha!']), TypeError)
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})
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it('extends a tf with other behaviors', () => {
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add.addImps([args => typeof args[0] === 'string', (s,x) => s + x]),
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assert.strictEqual(add('Kilroy', 23), 'Kilroy23')
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assert.throws(() => add(['Ha!'], 'gotcha'), TypeError)
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})
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it('can invalidate and lazily reload implementations', () => {
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slate.invalidate(defNumber)
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assert.strictEqual(slate.imps.length, 3) // reloader plus two non-number
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assert.strictEqual(slate(1), 'I am not number 4') // 'what' is now 3!!
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assert.strictEqual(slate('Yorlik', 7), 'Yorlik wuz here')
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assert.strictEqual(slate(false), 'Maybe I am a number')
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assert.strictEqual(slate.imps.length, 3) // reloader gone
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})
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})
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