144 lines
6.0 KiB
JavaScript
144 lines
6.0 KiB
JavaScript
import assert from 'assert'
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import math from '../src/pocomath.mjs'
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import PocomathInstance from '../src/core/PocomathInstance.mjs'
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import * as numbers from '../src/number/all.mjs'
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import * as numberAdd from '../src/number/add.mjs'
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import * as numberZero from '../src/number/zero.mjs'
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import {add as genericAdd} from '../src/generic/arithmetic.mjs'
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import * as complex from '../src/complex/all.mjs'
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import * as complexAdd from '../src/complex/add.mjs'
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import * as complexNegate from '../src/complex/negate.mjs'
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import * as complexComplex from '../src/complex/complex.mjs'
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import * as bigintAdd from '../src/bigint/add.mjs'
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import * as bigintZero from '../src/bigint/zero.mjs'
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import * as concreteSubtract from '../src/generic/subtract.concrete.mjs'
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import * as genericSubtract from '../src/generic/subtract.mjs'
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import extendToComplex from '../src/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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// Not much we can call without any number types:
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assert.deepStrictEqual(bw.complex(undefined, undefined), undefined)
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assert.deepStrictEqual(
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bw.chain(undefined).complex(undefined).value,
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undefined)
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// Don't have a way to negate things, for example:
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assert.throws(() => bw.negate(2), TypeError)
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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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bw.installType('string', {test: s => typeof s === 'string'})
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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(bw.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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assert.strictEqual(pm.floor(3.7), 3)
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assert.throws(() => pm.floor(10n), TypeError)
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assert.strictEqual(pm.chain(5).add(7).value, 12)
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pm.install(complexAdd)
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pm.install(complexNegate)
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pm.install(complexComplex)
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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(pm.complex(5, 0), pm.complex(10, 1)),
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math.complex(-5, -1))
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// And now floor has been activated for Complex as well, since the type
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// is present
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const fracComplex = math.complex(1.9, 0)
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const intComplex = math.complex(1)
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assert.deepStrictEqual(pm.floor(fracComplex), intComplex)
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// And the chain functions refresh themselves:
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assert.deepStrictEqual(
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pm.chain(5).add(pm.chain(0).complex(7).value).value, math.complex(5,7))
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})
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it("can defer definition of (even used) types", () => {
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const dt = new PocomathInstance('Deferred Types')
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dt.install(numberAdd)
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dt.install(numberZero) // for promoting numbers to complex, to fill in im
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dt.install({times: {
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'number,number': () => (m,n) => m*n,
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'Complex<T>,Complex<T>': ({'complex(T,T)': cplx}) => (w,z) => {
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return cplx(w.re*z.re - w.im*z.im, w.re*z.im + w.im*z.re)
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}
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}})
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// complex type not present but should still be able to add numbers:
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assert.strictEqual(dt.times(3,5), 15)
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dt.install(complexComplex)
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// times should now rebundle to allow complex:
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assert.deepStrictEqual(
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dt.times(dt.complex(2,3), dt.complex(2,-3)), dt.complex(13))
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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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cherry.install(numberZero) // for complex promotion
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await extendToComplex(cherry)
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cherry.install({add: genericAdd})
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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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*/
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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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it("can use bundles that are closed under dependency", () => {
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const ok = new PocomathInstance('concrete')
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ok.install(concreteSubtract)
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assert.strictEqual(ok.subtract(7, 5), 2)
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})
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it("can load generics and then import their dependences", async function () {
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const chase = new PocomathInstance('Chase Dependencies')
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chase.install(genericSubtract)
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chase.install(complexComplex) // for convenience to build complex numbers
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await chase.importDependencies(['bigint', 'complex'])
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/* Now we have an instance that supports subtraction for Gaussian
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integers.
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*/
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assert.deepStrictEqual(
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chase.subtract(chase.complex(3n, 2n), chase.complex(2n, 5n)),
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math.complex(1n, -3n))
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})
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it("instantiates templates correctly", () => {
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const inst = new PocomathInstance('InstantiateTemplates')
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inst.install(numberAdd)
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inst.install({typeMerge: {'T,T': ({T}) => (t,u) => 'Merge to ' + T }})
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assert.strictEqual(inst.typeMerge(7,6.28), 'Merge to number')
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assert.strictEqual(inst.typeMerge(7,6), 'Merge to NumInt')
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assert.strictEqual(inst.typeMerge(7.35,6), 'Merge to number')
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inst.install(complexAdd)
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inst.install(complexComplex)
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inst.install(bigintAdd)
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inst.install(bigintZero) // for complex promotion
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assert.strictEqual(
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inst.typeMerge(6n, inst.complex(3n, 2n)),
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'Merge to Complex<bigint>')
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assert.strictEqual(
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inst.typeMerge(3, inst.complex(4.5,2.1)),
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'Merge to Complex<number>')
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assert.throws(
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() => inst.typeMerge(3, inst.complex(3n)), TypeError)
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inst.install(genericSubtract)
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assert.throws(() => inst.typeMerge(3, undefined), TypeError)
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})
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})
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