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allTrue.spec.js
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allTrue.spec.js
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import { allTrue } from './allTrue.js'
test('with functions', () => {
const foo = () => 1
const bar = () => false
const baz = () => JSON.parse('{sda')
const result = allTrue(
foo, bar, baz
)
expect(result).toBeFalse()
})
test('usage with non boolean', () => {
const foo = { a : 1 }
const baz = [ 1, 2, 3 ]
const result = allTrue(
foo, foo, baz
)
expect(result).toBeTrue()
})
test('usage with boolean', () => {
const foo = 4
const baz = [ 1, 2, 3 ]
const result = allTrue(foo > 2, baz.length === 3)
expect(result).toBeTrue()
})
test('escapes early - case 0', () => {
const foo = undefined
const result = allTrue(foo, () => foo.a)
expect(result).toBeFalse()
})
test('escapes early - case 1', () => {
const foo = null
const result = allTrue(foo, () => foo.a)
expect(result).toBeFalse()
})
test('escapes early - case 2', () => {
const foo = { a : 'bar' }
const result = allTrue(
foo, foo.a, foo.a.b
)
expect(result).toBeFalse()
})
test('escapes early - case 3', () => {
const foo = { a : { b : 'foo' } }
const result = allTrue(
foo,
() => foo.a,
() => foo.a.b
)
expect(result).toBeTrue()
})