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fix: Prevent PocomathInstance from clobbering its own methods

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Resolves #6.
This commit is contained in:
Glen Whitney 2022-07-22 14:25:26 -07:00
parent 0069597a76
commit b72212d929
2 changed files with 25 additions and 2 deletions
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12
test/core/_PocomathInstance.mjs
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@ -1,13 +1,21 @@
import assert from 'assert'
import PocomathInstance from '../../src/core/PocomathInstance.mjs'
const pi = new PocomathInstance('dummy')
describe('PocomathInstance', () => {
it('creates an instance that can define typed-functions', () => {
const pi = new PocomathInstance('dummy')
pi.install({'add': {'any,any': [[], (a,b) => a+b]}})
pi.install({add: {'any,any': [[], (a,b) => a+b]}})
assert.strictEqual(pi.add(2,2), 4)
assert.strictEqual(pi.add('Kilroy', 17), 'Kilroy17')
assert.strictEqual(pi.add(1, undefined), NaN)
assert.throws(() => pi.add(1), TypeError)
})
it('reserves certain function names', () => {
assert.throws(
() => pi.install({install: {any: [[], x => x]}}), SyntaxError)
assert.throws(
() => pi.install({_foo: {any: [[], x => x]}}), SyntaxError)
})
})