Matt McFarland MattMcFarland
MattMcFarland
/ chance random and js verify.js
Created
March 15, 2017 00:11
chance random and js verify
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| const jsc = require('jsverify') | |
| const Chance = require('chance') | |
| const chance = new Chance() | |
| chance.mixin({ | |
| user: () => ({ | |
| first: chance.first(), | |
| last: chance.last(), | |
| email: chance.email() | |
| }) | |
| }) |
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| const Chance = require('chance') | |
| const chance = new Chance() | |
| chance.mixin({ | |
| user: () => ({ | |
| first: chance.first(), | |
| last: chance.last(), | |
| email: chance.email() | |
| }) | |
| }); | |
| console.log('here is a random user!', chance.user()) |
MattMcFarland
/ jsc check vs checkForAll.js
Created
March 15, 2017 00:10
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| jsc.checkForall(jsc.integer, jsc.integer, (a, b) => a + b === b + a) | |
| // is the same as | |
| jsc.check(jsc.forall(jsc.integer, jsc.integer, (a, b) => a + b === b + a)) |
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| const options = { | |
| tests: 5, // test count to run, default 100 | |
| size: 50, // maximum size of generated values, default 50 | |
| quiet: false, // do not console.log if true | |
| rngState: '074e9b5f037a8c21d6', // state string for the rng | |
| } |
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| test('addition is commutative', (t) => { | |
| t.plan(1) | |
| t.equal(jsc.checkForall(jsc.integer, jsc.integer, (a, b) => a + b === b + a), true) | |
| }) |
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| describe('Maths', () => { | |
| it('addition is commutative', () => { | |
| expect(jsc.checkForall(jsc.integer, jsc.integer, (a, b) => a + b === b + a)).toBeTrue() | |
| }) | |
| }) |
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| // using should: | |
| jsc.checkForall(jsc.integer, jsc.integer, (a, b) => a + b === b + a).should.be.true | |
| // using expect: | |
| expect(jsc.checkForall(jsc.integer, jsc.integer, (a, b) => a + b === b + a)).to.be.true |
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| describe('Maths', () => { | |
| it('addition is commutative', () => { | |
| jsc.assertForall(jsc.integer, jsc.integer, (a, b) => a + b === b + a) | |
| // same as: | |
| assert(jsc.checkForall(jsc.integer, jsc.integer, (a, b) => a + b === b + a) === true) | |
| }) | |
| }) |
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| // node assertion library | |
| assert(jsc.checkForall(jsc.integer, jsc.integer, (a, b) => a + b === b + a) === true) | |
| // same as: | |
| jsc.assertForall(jsc.integer, jsc.integer, (a, b) => a + b === b + a) |
MattMcFarland
/ js-verify-simple-example.js
Last active
March 15, 2017 06:46
A simple example using JS Verify
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| const jsc = require('jsverify') | |
| // With property based testing, we don't check for specific inputs and outputs, instead we are testing the boundaries of our code. | |
| const additionIsCommutative = jsc.checkForall(jsc.integer, jsc.integer, | |
| (a, b) => a + b === b + a) | |
| const multiplicationIsDistributive = jsc.checkForall(jsc.integer, jsc.integer, jsc.integer, | |
| (a, b, c) => a * (b + c) === a * b + a * c) | |
| // log out whether or not the test passed | |
| console.log({ additionIsCommutative, multiplicationIsDistributive }) |