58 lines
2.3 KiB
JavaScript
58 lines
2.3 KiB
JavaScript
import assert from 'assert'
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import math from '../pocomath.mjs'
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import typed from 'typed-function'
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import PocomathInstance from '../PocomathInstance.mjs'
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import * as numbers from '../number/all.mjs'
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import * as numberAdd from '../number/add.mjs'
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import * as complex from '../complex/all.mjs'
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import * as complexAdd from '../complex/add.mjs'
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import * as complexNegate from '../complex/negate.mjs'
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import extendToComplex from '../complex/extendToComplex.mjs'
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const bw = new PocomathInstance('backwards')
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describe('A custom instance', () => {
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it("works when partially assembled", () => {
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bw.install(complex)
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assert.deepStrictEqual(bw.add(2, bw.complex(0, 3)), {re: 2, im: 3})
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assert.deepStrictEqual(bw.negate(2), bw.complex(-2,-0))
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assert.deepStrictEqual(bw.subtract(2, bw.complex(0, 3)), {re: 2, im: -3})
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})
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it("can be assembled in any order", () => {
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bw.install(numbers)
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typed.addConversion({from: 'string', to: 'number', convert: x => +x})
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assert.strictEqual(bw.subtract(16, bw.add(3,4,2)), 7)
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assert.strictEqual(bw.negate('8'), -8)
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assert.deepStrictEqual(bw.add(bw.complex(1,3), 1), {re: 2, im: 3})
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assert.deepStrictEqual(
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bw.subtract(16, bw.add(3, bw.complex(0,4), 2)),
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math.complex(11, -4)) // note both instances coexist
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assert.deepStrictEqual(bw.negate(math.complex(3, '8')).im, -8)
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})
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it("can be assembled piecemeal", () => {
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const pm = new PocomathInstance('piecemeal')
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pm.install(numbers)
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assert.strictEqual(pm.subtract(5, 10), -5)
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pm.install(complexAdd)
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pm.install(complexNegate)
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// Should be enough to allow complex subtraction, as subtract is generic
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assert.deepStrictEqual(
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pm.subtract({re:5, im:0}, {re:10, im:1}), {re:-5, im: -1})
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})
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it("can selectively import in cute ways", async function () {
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const cherry = new PocomathInstance('cherry')
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cherry.install(numberAdd)
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await extendToComplex(cherry)
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// Now we have an instance that supports addition for number and complex
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// and little else:
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assert.strictEqual(cherry.add(3, 4, 2), 9)
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assert.deepStrictEqual(
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cherry.add(cherry.complex(3, 3), 4, cherry.complex(2, 2)),
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math.complex(9,5))
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assert.strictEqual('subtract' in cherry, false)
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assert.strictEqual('negate' in cherry, false)
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})
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})
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