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assert

Vitest 重新匯出 assert 方法,方法來自 chai,用於驗證不變項。

assert

  • 類型: (expression: any, message?: string) => asserts expression

斷言給定的 expression 為真,否則斷言失敗。

ts
import { assert, test } from 'vitest'

test('assert', () => {
  assert('foo' !== 'bar', 'foo should not be equal to bar')
})

fail

  • 類型
    • (message?: string) => never
    • <T>(actual: T, expected: T, message?: string, operator?: string) => never

強制斷言失敗。

ts
import { assert, test } from 'vitest'

test('assert.fail', () => {
  assert.fail('error message on failure')
  assert.fail('foo', 'bar', 'foo is not bar', '===')
})

isOk

  • 類型: <T>(value: T, message?: string) => void
  • 別名 ok

斷言給定的 value 為真。

ts
import { assert, test } from 'vitest'

test('assert.isOk', () => {
  assert.isOk('foo', 'every truthy is ok')
  assert.isOk(false, 'this will fail since false is not truthy')
})

isNotOk

  • 類型: <T>(value: T, message?: string) => void
  • 別名 notOk

斷言給定的 value 為假。

ts
import { assert, test } from 'vitest'

test('assert.isNotOk', () => {
  assert.isNotOk('foo', 'this will fail, every truthy is not ok')
  assert.isNotOk(false, 'this will pass since false is falsy')
})

equal

  • 類型: <T>(actual: T, expected: T, message?: string) => void

斷言 actualexpected 的非嚴格相等(==)。

ts
import { assert, test } from 'vitest'

test('assert.equal', () => {
  assert.equal(Math.sqrt(4), '2')
})

notEqual

  • 類型: <T>(actual: T, expected: T, message?: string) => void

斷言 actualexpected 的非嚴格不相等(!=)。

ts
import { assert, test } from 'vitest'

test('assert.equal', () => {
  assert.notEqual(Math.sqrt(4), 3)
})

strictEqual

  • 類型: <T>(actual: T, expected: T, message?: string) => void

斷言 actualexpected 的嚴格相等(===)。

ts
import { assert, test } from 'vitest'

test('assert.strictEqual', () => {
  assert.strictEqual(Math.sqrt(4), 2)
})

deepEqual

  • 類型: <T>(actual: T, expected: T, message?: string) => void

斷言 actualexpected 深度相等。

ts
import { assert, test } from 'vitest'

test('assert.deepEqual', () => {
  assert.deepEqual({ color: 'green' }, { color: 'green' })
})

notDeepEqual

  • 類型: <T>(actual: T, expected: T, message?: string) => void

斷言 actualexpected 深度不相等。

ts
import { assert, test } from 'vitest'

test('assert.notDeepEqual', () => {
  assert.notDeepEqual({ color: 'green' }, { color: 'red' })
})

isAbove

  • 類型: (valueToCheck: number, valueToBeAbove: number, message?: string) => void

斷言 valueToCheck 嚴格大於(>)valueToBeAbove

ts
import { assert, test } from 'vitest'

test('assert.isAbove', () => {
  assert.isAbove(5, 2, '5 is strictly greater than 2')
})

isAtLeast

  • 類型: (valueToCheck: number, valueToBeAtLeast: number, message?: string) => void

斷言 valueToCheck 大於或等於(> =)valueToBeAtLeast

ts
import { assert, test } from 'vitest'

test('assert.isAtLeast', () => {
  assert.isAtLeast(5, 2, '5 is greater or equal to 2')
  assert.isAtLeast(3, 3, '3 is greater or equal to 3')
})

isBelow

  • 類型: (valueToCheck: number, valueToBeBelow: number, message?: string) => void

斷言 valueToCheck 嚴格小於(<)valueToBeBelow

ts
import { assert, test } from 'vitest'

test('assert.isBelow', () => {
  assert.isBelow(3, 6, '3 is strictly less than 6')
})

isAtMost

  • 類型: (valueToCheck: number, valueToBeAtMost: number, message?: string) => void

斷言 valueToCheck 小於或等於(< =)valueToBeAtMost

ts
import { assert, test } from 'vitest'

test('assert.isAtMost', () => {
  assert.isAtMost(3, 6, '3 is less than or equal to 6')
  assert.isAtMost(4, 4, '4 is less than or equal to 4')
})

isTrue

  • 類型: <T>(value: T, message?: string) => void

斷言 value 為 true。

ts
import { assert, test } from 'vitest'

const testPassed = true

test('assert.isTrue', () => {
  assert.isTrue(testPassed)
})

isNotTrue

  • 類型: <T>(value: T, message?: string) => void

斷言 value 不為 true。

ts
import { assert, test } from 'vitest'

const testPassed = 'ok'

test('assert.isNotTrue', () => {
  assert.isNotTrue(testPassed)
})

isFalse

  • 類型: <T>(value: T, message?: string) => void

斷言 value 為 false。

ts
import { assert, test } from 'vitest'

const testPassed = false

test('assert.isFalse', () => {
  assert.isFalse(testPassed)
})

isNotFalse

  • 類型: <T>(value: T, message?: string) => void

斷言 value 不為 false。

ts
import { assert, test } from 'vitest'

const testPassed = 'no'

test('assert.isNotFalse', () => {
  assert.isNotFalse(testPassed)
})

isNull

  • 類型: <T>(value: T, message?: string) => void

斷言 value 為 null。

ts
import { assert, test } from 'vitest'

const error = null

test('assert.isNull', () => {
  assert.isNull(error, 'error is null')
})

isNotNull

  • 類型: <T>(value: T, message?: string) => void

斷言 value 不為 null。

ts
import { assert, test } from 'vitest'

const error = { message: 'error was occured' }

test('assert.isNotNull', () => {
  assert.isNotNull(error, 'error is not null but object')
})

isNaN

  • 類型: <T>(value: T, message?: string) => void

斷言 value 為 NaN。

ts
import { assert, test } from 'vitest'

const calculation = 1 * 'viitest'

test('assert.isNaN', () => {
  assert.isNaN(calculation, '1 * "vitest" is NaN')
})

isNotNaN

  • 類型: <T>(value: T, message?: string) => void

斷言 value 不為 NaN。

ts
import { assert, test } from 'vitest'

const calculation = 1 * 2

test('assert.isNotNaN', () => {
  assert.isNotNaN(calculation, '1 * 2 is Not NaN but 2')
})

exists

  • 類型: <T>(value: T, message?: string) => void

斷言 value 不為 null 或 undefined。

ts
import { assert, test } from 'vitest'

const name = 'foo'

test('assert.exists', () => {
  assert.exists(name, 'foo is neither null nor undefined')
})

notExists

  • 類型: <T>(value: T, message?: string) => void

斷言 value 為 null 或 undefined。

ts
import { assert, test } from 'vitest'

const foo = null
const bar = undefined

test('assert.notExists', () => {
  assert.notExists(foo, 'foo is null so not exist')
  assert.notExists(bar, 'bar is undefined so not exist')
})

isUndefined

  • 類型: <T>(value: T, message?: string) => void

斷言 value 為 undefined。

ts
import { assert, test } from 'vitest'

const name = undefined

test('assert.isUndefined', () => {
  assert.isUndefined(name, 'name is undefined')
})

isDefined

  • 類型: <T>(value: T, message?: string) => void

斷言 value 不為 undefined。

ts
import { assert, test } from 'vitest'

const name = 'foo'

test('assert.isDefined', () => {
  assert.isDefined(name, 'name is not undefined')
})

isFunction

  • 類型: <T>(value: T, message?: string) => void
  • 別名: isCallable 斷言 value 為函式。
ts
import { assert, test } from 'vitest'

function name() { return 'foo' };

test('assert.isFunction', () => {
  assert.isFunction(name, 'name is function')
})

isNotFunction

  • 類型: <T>(value: T, message?: string) => void
  • 別名: isNotCallable

斷言 value 不為函式。

ts
import { assert, test } from 'vitest'

const name = 'foo'

test('assert.isNotFunction', () => {
  assert.isNotFunction(name, 'name is not function but string')
})

isObject

  • 類型: <T>(value: T, message?: string) => void

斷言 value 為 Object 型別的物件(由 Object.prototype.toString 顯示)。斷言不符合子類別物件。

ts
import { assert, test } from 'vitest'

const someThing = { color: 'red', shape: 'circle' }

test('assert.isObject', () => {
  assert.isObject(someThing, 'someThing is object')
})

isNotObject

  • 類型: <T>(value: T, message?: string) => void

斷言 value 不為 Object 型別的物件(由 Object.prototype.toString 顯示)。斷言不符合子類別物件。

ts
import { assert, test } from 'vitest'

const someThing = 'redCircle'

test('assert.isNotObject', () => {
  assert.isNotObject(someThing, 'someThing is not object but string')
})

isArray

  • 類型: <T>(value: T, message?: string) => void

斷言 value 為陣列。

ts
import { assert, test } from 'vitest'

const color = ['red', 'green', 'yellow']

test('assert.isArray', () => {
  assert.isArray(color, 'color is array')
})

isNotArray

  • 類型: <T>(value: T, message?: string) => void

斷言 value 不為陣列。

ts
import { assert, test } from 'vitest'

const color = 'red'

test('assert.isNotArray', () => {
  assert.isNotArray(color, 'color is not array but string')
})

isString

  • 類型: <T>(value: T, message?: string) => void

斷言 value 為字串。

ts
import { assert, test } from 'vitest'

const color = 'red'

test('assert.isString', () => {
  assert.isString(color, 'color is string')
})

isNotString

  • 類型: <T>(value: T, message?: string) => void

斷言 value 不為字串。

ts
import { assert, test } from 'vitest'

const color = ['red', 'green', 'yellow']

test('assert.isNotString', () => {
  assert.isNotString(color, 'color is not string but array')
})

isNumber

  • 類型: <T>(value: T, message?: string) => void

斷言 value 是數字。

ts
import { assert, test } from 'vitest'

const colors = 3

test('assert.isNumber', () => {
  assert.isNumber(colors, 'colors is number')
})

isNotNumber

  • 類型: <T>(value: T, message?: string) => void

斷言 value 不是數字。

ts
import { assert, test } from 'vitest'

const colors = '3 colors'

test('assert.isNotNumber', () => {
  assert.isNotNumber(colors, 'colors is not number but strings')
})

isFinite

  • 類型: <T>(value: T, message?: string) => void

斷言 value 是有限數字(非 NaN、Infinity)。

ts
import { assert, test } from 'vitest'

const colors = 3

test('assert.isFinite', () => {
  assert.isFinite(colors, 'colors is number not NaN or Infinity')
})

isBoolean

  • 類型: <T>(value: T, message?: string) => void

斷言 value 是布林值。

ts
import { assert, test } from 'vitest'

const isReady = true

test('assert.isBoolean', () => {
  assert.isBoolean(isReady, 'isReady is a boolean')
})

isNotBoolean

  • 類型: <T>(value: T, message?: string) => void

斷言 value 不是布林值。

ts
import { assert, test } from 'vitest'

const isReady = 'sure'

test('assert.isBoolean', () => {
  assert.isBoolean(isReady, 'isReady is not a boolean but string')
})

typeOf

  • 類型: <T>(value: T, name: string, message?: string) => void

斷言 value 的類型是 name,由 Object.prototype.toString 決定。

ts
import { assert, test } from 'vitest'

test('assert.typeOf', () => {
  assert.typeOf({ color: 'red' }, 'object', 'we have an object')
  assert.typeOf(['red', 'green'], 'array', 'we have an array')
  assert.typeOf('red', 'string', 'we have a string')
  assert.typeOf(/red/, 'regexp', 'we have a regular expression')
  assert.typeOf(null, 'null', 'we have a null')
  assert.typeOf(undefined, 'undefined', 'we have an undefined')
})

notTypeOf

  • 類型: <T>(value: T, name: string, message?: string) => void

斷言 value 的類型不是 name,由 Object.prototype.toString 決定。

ts
import { assert, test } from 'vitest'

test('assert.notTypeOf', () => {
  assert.notTypeOf('red', 'number', '"red" is not a number')
})

instanceOf

  • 類型: <T>(value: T, constructor: Function, message?: string) => void

斷言 valueconstructor 的實例。

ts
import { assert, test } from 'vitest'

function Person(name) { this.name = name }
const foo = new Person('foo')

class Tea {
  constructor(name) {
    this.name = name
  }
}
const coffee = new Tea('coffee')

test('assert.instanceOf', () => {
  assert.instanceOf(foo, Person, 'foo is an instance of Person')
  assert.instanceOf(coffee, Tea, 'coffee is an instance of Tea')
})

notInstanceOf

  • 類型: <T>(value: T, constructor: Function, message?: string) => void

斷言 value 不是 constructor 的實例。

ts
import { assert, test } from 'vitest'

function Person(name) { this.name = name }
const foo = new Person('foo')

class Tea {
  constructor(name) {
    this.name = name
  }
}
const coffee = new Tea('coffee')

test('assert.instanceOf', () => {
  assert.instanceOf(foo, Tea, 'foo is not an instance of Tea')
})

include

  • 類型
    • (haystack: string, needle: string, message?: string) => void
    • <T>(haystack: readonly T[] | ReadonlySet<T> | ReadonlyMap<any, T>, needle: T, message?: string) => void
    • <T extends object>(haystack: WeakSet<T>, needle: T, message?: string) => void
    • <T>(haystack: T, needle: Partial<T>, message?: string) => void

斷言 haystack 包含 needle。可用於斷言陣列中值的包含、字串中的子字串或物件中屬性子集的包含。

ts
import { assert, test } from 'vitest'

test('assert.include', () => {
  assert.include([1, 2, 3], 2, 'array contains value')
  assert.include('foobar', 'foo', 'string contains substring')
  assert.include({ foo: 'bar', hello: 'universe' }, { foo: 'bar' }, 'object contains property')
})

notInclude

  • 類型
    • (haystack: string, needle: string, message?: string) => void
    • <T>(haystack: readonly T[] | ReadonlySet<T> | ReadonlyMap<any, T>, needle: T, message?: string) => void
    • <T extends object>(haystack: WeakSet<T>, needle: T, message?: string) => void
    • <T>(haystack: T, needle: Partial<T>, message?: string) => void

斷言 haystack 不包含 needle。可用於斷言陣列中值的遺漏、字串中的子字串遺漏或物件中屬性子集的遺漏。

ts
import { assert, test } from 'vitest'

test('assert.notInclude', () => {
  assert.notInclude([1, 2, 3], 4, 'array doesn\'t contain 4')
  assert.notInclude('foobar', 'baz', 'foobar doesn\'t contain baz')
  assert.notInclude({ foo: 'bar', hello: 'universe' }, { foo: 'baz' }, 'object doesn\'t contain property')
})

deepInclude

  • 類型
  • (haystack: string, needle: string, message?: string) => void
  • <T>(haystack: readonly T[] | ReadonlySet<T> | ReadonlyMap<any, T>, needle: T, message?: string) => void
  • <T>(haystack: T, needle: T extends WeakSet<any> ? never : Partial<T>, message?: string) => void

斷言 haystack 包含 needle。可用於斷言陣列中值的包含或物件中屬性子集的包含。使用深度相等性。

ts
import { assert, test } from 'vitest'

const obj1 = { a: 1 }
const obj2 = { b: 2 }

test('assert.deepInclude', () => {
  assert.deepInclude([obj1, obj2], { a: 1 })
  assert.deepInclude({ foo: obj1, bar: obj2 }, { foo: { a: 1 } })
})

notDeepInclude

  • 類型
    • (haystack: string, needle: string, message?: string) => void
    • <T>(haystack: readonly T[] | ReadonlySet<T> | ReadonlyMap<any, T>, needle: T, message?: string) => void
    • <T>(haystack: T, needle: T extends WeakSet<any> ? never : Partial<T>, message?: string) => void

斷言 haystack 不包含 needle。可用於斷言陣列中沒有某個值或物件中沒有某個子集合的屬性。使用深度相等性。

ts
import { assert, test } from 'vitest'

const obj1 = { a: 1 }
const obj2 = { b: 2 }

test('assert.notDeepInclude', () => {
  assert.notDeepInclude([obj1, obj2], { a: 10 })
  assert.notDeepInclude({ foo: obj1, bar: obj2 }, { foo: { a: 10 } })
})

nestedInclude

  • 類型: (haystack: any, needle: any, message?: string) => void

斷言 haystack 包含 needle。可用於斷言物件中包含某個子集合的屬性。允許使用點號和方括號表示法來參照巢狀屬性。屬性名稱中的「[]」和「.」可以使用雙反斜線進行跳脫。

ts
import { assert, test } from 'vitest'

test('assert.nestedInclude', () => {
  assert.nestedInclude({ '.a': { b: 'x' } }, { '\\.a.[b]': 'x' })
  assert.nestedInclude({ a: { '[b]': 'x' } }, { 'a.\\[b\\]': 'x' })
})

notNestedInclude

  • 類型: (haystack: any, needle: any, message?: string) => void

斷言 haystack 不包含 needle。可用於斷言物件中包含某個子集合的屬性。允許使用點號和方括號表示法來參照巢狀屬性。屬性名稱中的「[]」和「.」可以使用雙反斜線進行跳脫。

ts
import { assert, test } from 'vitest'

test('assert.nestedInclude', () => {
  assert.notNestedInclude({ '.a': { b: 'x' } }, { '\\.a.b': 'y' })
  assert.notNestedInclude({ a: { '[b]': 'x' } }, { 'a.\\[b\\]': 'y' })
})

deepNestedInclude

  • 類型: (haystack: any, needle: any, message?: string) => void

斷言 haystack 包含 needle。可用於斷言物件中包含某個子集合的屬性,同時檢查深度相等性。允許使用點號和方括號表示法來參照巢狀屬性。屬性名稱中的「[]」和「.」可以使用雙反斜線進行跳脫。

ts
import { assert, test } from 'vitest'

test('assert.deepNestedInclude', () => {
  assert.deepNestedInclude({ a: { b: [{ x: 1 }] } }, { 'a.b[0]': { x: 1 } })
  assert.deepNestedInclude({ '.a': { '[b]': { x: 1 } } }, { '\\.a.\\[b\\]': { x: 1 } })
})

notDeepNestedInclude

  • 類型: (haystack: any, needle: any, message?: string) => void

斷言 haystack 不包含 needle。可用於斷言物件中不包含某個子集合的屬性,同時檢查深度相等性。允許使用點號和方括號表示法來參照巢狀屬性。屬性名稱中的「[]」和「.」可以使用雙反斜線進行跳脫。

ts
import { assert, test } from 'vitest'

test('assert.notDeepNestedInclude', () => {
  assert.notDeepNestedInclude({ a: { b: [{ x: 1 }] } }, { 'a.b[0]': { y: 1 } })
  assert.notDeepNestedInclude({ '.a': { '[b]': { x: 1 } } }, { '\\.a.\\[b\\]': { y: 2 } })
})

ownInclude

  • 類型: (haystack: any, needle: any, message?: string) => void

斷言 haystack 包含 needle。可用於斷言物件中包含某個子集合的屬性,同時忽略繼承的屬性。

ts
import { assert, test } from 'vitest'

test('assert.ownInclude', () => {
  assert.ownInclude({ a: 1 }, { a: 1 })
})

notOwnInclude

  • 類型: (haystack: any, needle: any, message?: string) => void

斷言 haystack 包含 needle。可用於斷言物件中不包含某個子集合的屬性,同時忽略繼承的屬性。

ts
import { assert, test } from 'vitest'

const obj1 = {
  b: 2
}

const obj2 = object.create(obj1)
obj2.a = 1

test('assert.notOwnInclude', () => {
  assert.notOwnInclude(obj2, { b: 2 })
})

deepOwnInclude

  • 類型: (haystack: any, needle: any, message?: string) => void

斷言 haystack 包含 needle。可用於斷言物件中包含某個子集合的屬性,同時忽略繼承的屬性並檢查深度相等性。

ts
import { assert, test } from 'vitest'

test('assert.deepOwnInclude', () => {
  assert.deepOwnInclude({ a: { b: 2 } }, { a: { b: 2 } })
})

notDeepOwnInclude

  • 類型: (haystack: any, needle: any, message?: string) => void

斷言 haystack 不包含 needle。可用於斷言物件中不包含某個子集合的屬性,同時忽略繼承的屬性並檢查深度相等性。

ts
import { assert, test } from 'vitest'

test('assert.notDeepOwnInclude', () => {
  assert.notDeepOwnInclude({ a: { b: 2 } }, { a: { c: 3 } })
})

match

  • 類型: (value: string, regexp: RegExp, message?: string) => void

斷言 value 符合正規表示式 regexp

ts
import { assert, test } from 'vitest'

test('assert.match', () => {
  assert.match('foobar', /^foo/, 'regexp matches')
})

notMatch

  • 類型: (value: string, regexp: RegExp, message?: string) => void

斷言 value 不符合正規表示式 regexp

ts
import { assert, test } from 'vitest'

test('assert.notMatch', () => {
  assert.notMatch('foobar', /^foo/, 'regexp does not match')
})

property

  • 類型: <T>(object: T, property: string, message?: string) => void

斷言 object 具有 property 指定的直接或繼承屬性

ts
import { assert, test } from 'vitest'

test('assert.property', () => {
  assert.property({ tea: { green: 'matcha' } }, 'tea')
  assert.property({ tea: { green: 'matcha' } }, 'toString')
})

notProperty

  • 類型: <T>(object: T, property: string, message?: string) => void

斷言 object 不具有 property 指定的直接或繼承屬性

ts
import { assert, test } from 'vitest'

test('assert.notProperty', () => {
  assert.notProperty({ tea: { green: 'matcha' } }, 'coffee')
})

propertyVal

  • 類型: <T, V>(object: T, property: string, value: V, message?: string) => void

斷言 object 具有 property 指定的直接或繼承屬性,且其值由 value 指定。使用嚴格相等性檢查 (===)。

ts
import { assert, test } from 'vitest'

test('assert.notPropertyVal', () => {
  assert.propertyVal({ tea: 'is good' }, 'tea', 'is good')
})

notPropertyVal

  • 類型: <T, V>(object: T, property: string, value: V, message?: string) => void

斷言 object 不具有 property 指定的直接或繼承屬性,且其值由 value 指定。使用嚴格相等性檢查 (===)。

ts
import { assert, test } from 'vitest'

test('assert.notPropertyVal', () => {
  assert.notPropertyVal({ tea: 'is good' }, 'tea', 'is bad')
  assert.notPropertyVal({ tea: 'is good' }, 'coffee', 'is good')
})

deepPropertyVal

  • 類型: <T, V>(object: T, property: string, value: V, message?: string) => void

斷言 object 具有 property 指定的直接或繼承屬性,且其值由 value 指定。使用深度相等性檢查。

ts
import { assert, test } from 'vitest'

test('assert.deepPropertyVal', () => {
  assert.deepPropertyVal({ tea: { green: 'matcha' } }, 'tea', { green: 'matcha' })
})

notDeepPropertyVal

  • 類型: <T, V>(object: T, property: string, value: V, message?: string) => void

斷言 object 不具有 property 指定的直接或繼承屬性,且其值由 value 指定。使用深度相等性檢查。

ts
import { assert, test } from 'vitest'

test('assert.deepPropertyVal', () => {
  assert.notDeepPropertyVal({ tea: { green: 'matcha' } }, 'tea', { black: 'matcha' })
  assert.notDeepPropertyVal({ tea: { green: 'matcha' } }, 'tea', { green: 'oolong' })
  assert.notDeepPropertyVal({ tea: { green: 'matcha' } }, 'coffee', { green: 'matcha' })
})

nestedProperty

  • 類型: <T>(object: T, property: string, message?: string) => void

斷言 object 具有 property 指定的直接或繼承屬性,其中 property 可以是使用點號和方括號表示法的字串,以表示巢狀參考。

ts
import { assert, test } from 'vitest'

test('assert.deepPropertyVal', () => {
  assert.nestedProperty({ tea: { green: 'matcha' } }, 'tea.green')
})

notNestedProperty

  • 類型: <T>(object: T, property: string, message?: string) => void

斷言 object 不具有 property 指定的直接或繼承屬性,其中 property 可以是使用點號和方括號表示法的字串,以表示巢狀參考。

ts
import { assert, test } from 'vitest'

test('assert.deepPropertyVal', () => {
  assert.notNestedProperty({ tea: { green: 'matcha' } }, 'tea.oolong')
})

nestedPropertyVal

  • 類型: <T>(object: T, property: string, value: any, message?: string) => void

斷言 object 有一個由 property 命名,且值由 value 提供的屬性。property 可以使用點號和方括號表示法進行巢狀參考。使用嚴格相等性檢查 (===)。

ts
import { assert, test } from 'vitest'

test('assert.nestedPropertyVal', () => {
  assert.nestedPropertyVal({ tea: { green: 'matcha' } }, 'tea.green', 'matcha')
})

notNestedPropertyVal

  • 類型: <T>(object: T, property: string, value: any, message?: string) => void

斷言 object 沒有由 property 命名,且值由 value 提供的屬性。property 可以使用點號和方括號表示法進行巢狀參考。使用嚴格相等性檢查 (===)。

ts
import { assert, test } from 'vitest'

test('assert.notNestedPropertyVal', () => {
  assert.notNestedPropertyVal({ tea: { green: 'matcha' } }, 'tea.green', 'konacha')
  assert.notNestedPropertyVal({ tea: { green: 'matcha' } }, 'coffee.green', 'matcha')
})

deepNestedPropertyVal

  • 類型: <T>(object: T, property: string, value: any, message?: string) => void

斷言 object 有一個由 property 命名,且值由 value 提供的屬性。property 可以使用點號和方括號表示法進行巢狀參考。使用深度相等性檢查 (===)。

ts
import { assert, test } from 'vitest'

test('assert.notNestedPropertyVal', () => {
  assert.notNestedPropertyVal({ tea: { green: 'matcha' } }, 'tea.green', 'konacha')
  assert.notNestedPropertyVal({ tea: { green: 'matcha' } }, 'coffee.green', 'matcha')
})

notDeepNestedPropertyVal

  • 類型: <T>(object: T, property: string, value: any, message?: string) => void

斷言 object 沒有由 property 命名,且值由 value 提供的屬性。property 可以使用點號和方括號表示法進行巢狀參考。使用深度相等性檢查。

ts
import { assert, test } from 'vitest'

test('assert.notDeepNestedPropertyVal', () => {
  assert.notDeepNestedPropertyVal({ tea: { green: { matcha: 'yum' } } }, 'tea.green', { oolong: 'yum' })
  assert.notDeepNestedPropertyVal({ tea: { green: { matcha: 'yum' } } }, 'tea.green', { matcha: 'yuck' })
  assert.notDeepNestedPropertyVal({ tea: { green: { matcha: 'yum' } } }, 'tea.black', { matcha: 'yum' })
})

lengthOf

  • 類型: <T extends { readonly length?: number | undefined } | { readonly size?: number | undefined }>(object: T, length: number, message?: string) => void

斷言 object 具有預期值的 lengthsize

ts
import { assert, test } from 'vitest'

test('assert.lengthOf', () => {
  assert.lengthOf([1, 2, 3], 3, 'array has length of 3')
  assert.lengthOf('foobar', 6, 'string has length of 6')
  assert.lengthOf(new Set([1, 2, 3]), 3, 'set has size of 3')
  assert.lengthOf(new Map([['a', 1], ['b', 2], ['c', 3]]), 3, 'map has size of 3')
})

hasAnyKeys

  • 類型: <T>(object: T, keys: Array<Object | string> | { [key: string]: any }, message?: string) => void

斷言 object 具有所提供的 keys 中至少一個。您也可以提供一個單一物件,而不是一個鍵陣列,其鍵將用作預期的鍵集。

ts
import { assert, test } from 'vitest'

test('assert.hasAnyKeys', () => {
  assert.hasAnyKeys({ foo: 1, bar: 2, baz: 3 }, ['foo', 'iDontExist', 'baz'])
  assert.hasAnyKeys({ foo: 1, bar: 2, baz: 3 }, { foo: 30, iDontExist: 99, baz: 1337 })
  assert.hasAnyKeys(new Map([[{ foo: 1 }, 'bar'], ['key', 'value']]), [{ foo: 1 }, 'key'])
  assert.hasAnyKeys(new Set([{ foo: 'bar' }, 'anotherKey']), [{ foo: 'bar' }, 'anotherKey'])
})

hasAllKeys

  • 類型: <T>(object: T, keys: Array<Object | string> | { [key: string]: any }, message?: string) => void

斷言 object 具有所提供的 keys 的全部且僅全部。您也可以提供一個單一物件,而不是一個鍵陣列,其鍵將用作預期的鍵集。

ts
import { assert, test } from 'vitest'

test('assert.hasAllKeys', () => {
  assert.hasAllKeys({ foo: 1, bar: 2, baz: 3 }, ['foo', 'bar', 'baz'])
  assert.hasAllKeys({ foo: 1, bar: 2, baz: 3 }, { foo: 30, bar: 99, baz: 1337 })
  assert.hasAllKeys(new Map([[{ foo: 1 }, 'bar'], ['key', 'value']]), [{ foo: 1 }, 'key'])
  assert.hasAllKeys(new Set([{ foo: 'bar' }, 'anotherKey'], [{ foo: 'bar' }, 'anotherKey']))
})

containsAllKeys

  • 類型: <T>(object: T, keys: Array<Object | string> | { [key: string]: any }, message?: string) => void

斷言 object 具有所提供的 keys 的全部,但可能具有更多未列出的鍵。您也可以提供一個單一物件,而不是一個鍵陣列,其鍵將用作預期的鍵集。

ts
import { assert, test } from 'vitest'

test('assert.containsAllKeys', () => {
  assert.containsAllKeys({ foo: 1, bar: 2, baz: 3 }, ['foo', 'baz'])
  assert.containsAllKeys({ foo: 1, bar: 2, baz: 3 }, ['foo', 'bar', 'baz'])
  assert.containsAllKeys({ foo: 1, bar: 2, baz: 3 }, { foo: 30, baz: 1337 })
  assert.containsAllKeys({ foo: 1, bar: 2, baz: 3 }, { foo: 30, bar: 99, baz: 1337 })
  assert.containsAllKeys(new Map([[{ foo: 1 }, 'bar'], ['key', 'value']]), [{ foo: 1 }])
  assert.containsAllKeys(new Map([[{ foo: 1 }, 'bar'], ['key', 'value']]), [{ foo: 1 }, 'key'])
  assert.containsAllKeys(new Set([{ foo: 'bar' }, 'anotherKey'], [{ foo: 'bar' }]))
  assert.containsAllKeys(new Set([{ foo: 'bar' }, 'anotherKey'], [{ foo: 'bar' }, 'anotherKey']))
})

doesNotHaveAnyKeys

  • 類型: <T>(object: T, keys: Array<Object | string> | { [key: string]: any }, message?: string) => void

斷言 object 沒有任何所提供的 keys。您也可以提供一個單一物件,而不是一個鍵陣列,其鍵將用作預期的鍵集。

ts
import { assert, test } from 'vitest'

test('assert.doesNotHaveAnyKeys', () => {
  assert.doesNotHaveAnyKeys({ foo: 1, bar: 2, baz: 3 }, ['one', 'two', 'example'])
  assert.doesNotHaveAnyKeys({ foo: 1, bar: 2, baz: 3 }, { one: 1, two: 2, example: 'foo' })
  assert.doesNotHaveAnyKeys(new Map([[{ foo: 1 }, 'bar'], ['key', 'value']]), [{ one: 'two' }, 'example'])
  assert.doesNotHaveAnyKeys(new Set([{ foo: 'bar' }, 'anotherKey'], [{ one: 'two' }, 'example']))
})

doesNotHaveAllKeys

  • 類型: <T>(object: T, keys: Array<Object | string> | { [key: string]: any }, message?: string) => void

斷言 object 至少沒有其中一個提供的 keys。您也可以提供一個單一物件,而不是一個 keys 陣列,其 keys 將被用作預期的 keys 組。

ts
import { assert, test } from 'vitest'

test('assert.hasAnyKeys', () => {
  assert.doesNotHaveAnyKeys({ foo: 1, bar: 2, baz: 3 }, ['one', 'two', 'example'])
  assert.doesNotHaveAnyKeys({ foo: 1, bar: 2, baz: 3 }, { one: 1, two: 2, example: 'foo' })
  assert.doesNotHaveAnyKeys(new Map([[{ foo: 1 }, 'bar'], ['key', 'value']]), [{ one: 'two' }, 'example'])
  assert.doesNotHaveAnyKeys(new Set([{ foo: 'bar' }, 'anotherKey']), [{ one: 'two' }, 'example'])
})

hasAnyDeepKeys

  • 類型: <T>(object: T, keys: Array<Object | string> | { [key: string]: any }, message?: string) => void

斷言 object 至少有一個提供的 keys。由於 Sets 和 Maps 可以將物件作為 keys,因此您可以使用此斷言來執行深度比較。您也可以提供一個單一物件,而不是一個 keys 陣列,其 keys 將被用作預期的 keys 組。

ts
import { assert, test } from 'vitest'

test('assert.hasAnyDeepKeys', () => {
  assert.hasAnyDeepKeys(new Map([[{ one: 'one' }, 'valueOne'], [1, 2]]), { one: 'one' })
  assert.hasAnyDeepKeys(new Map([[{ one: 'one' }, 'valueOne'], [1, 2]]), [{ one: 'one' }, { two: 'two' }])
  assert.hasAnyDeepKeys(new Map([[{ one: 'one' }, 'valueOne'], [{ two: 'two' }, 'valueTwo']]), [{ one: 'one' }, { two: 'two' }])
  assert.hasAnyDeepKeys(new Set([{ one: 'one' }, { two: 'two' }]), { one: 'one' })
  assert.hasAnyDeepKeys(new Set([{ one: 'one' }, { two: 'two' }]), [{ one: 'one' }, { three: 'three' }])
  assert.hasAnyDeepKeys(new Set([{ one: 'one' }, { two: 'two' }]), [{ one: 'one' }, { two: 'two' }])
})

hasAllDeepKeys

  • 類型: <T>(object: T, keys: Array<Object | string> | { [key: string]: any }, message?: string) => void

斷言 object 只有且僅有所有提供的 keys。由於 Sets 和 Maps 可以將物件作為 keys,因此您可以使用此斷言來執行深度比較。您也可以提供一個單一物件,而不是一個 keys 陣列,其 keys 將被用作預期的 keys 組。

ts
import { assert, test } from 'vitest'

test('assert.hasAnyDeepKeys', () => {
  assert.hasAllDeepKeys(new Map([[{ one: 'one' }, 'valueOne']]), { one: 'one' })
  assert.hasAllDeepKeys(new Map([[{ one: 'one' }, 'valueOne'], [{ two: 'two' }, 'valueTwo']]), [{ one: 'one' }, { two: 'two' }])
  assert.hasAllDeepKeys(new Set([{ one: 'one' }]), { one: 'one' })
  assert.hasAllDeepKeys(new Set([{ one: 'one' }, { two: 'two' }]), [{ one: 'one' }, { two: 'two' }])
})

containsAllDeepKeys

  • 類型: <T>(object: T, keys: Array<Object | string> | { [key: string]: any }, message?: string) => void

斷言 object 包含所有提供的 keys。由於 Sets 和 Maps 可以將物件作為 keys,因此您可以使用此斷言來執行深度比較。您也可以提供一個單一物件,而不是一個 keys 陣列,其 keys 將被用作預期的 keys 組。

ts
import { assert, test } from 'vitest'

test('assert.containsAllDeepKeys', () => {
  assert.containsAllDeepKeys(new Map([[{ one: 'one' }, 'valueOne'], [1, 2]]), { one: 'one' })
  assert.containsAllDeepKeys(new Map([[{ one: 'one' }, 'valueOne'], [{ two: 'two' }, 'valueTwo']]), [{ one: 'one' }, { two: 'two' }])
  assert.containsAllDeepKeys(new Set([{ one: 'one' }, { two: 'two' }]), { one: 'one' })
  assert.containsAllDeepKeys(new Set([{ one: 'one' }, { two: 'two' }]), [{ one: 'one' }, { two: 'two' }])
})

doesNotHaveAnyDeepKeys

  • 類型: <T>(object: T, keys: Array<Object | string> | { [key: string]: any }, message?: string) => void

斷言 object 沒有任何提供的 keys。由於 Sets 和 Maps 可以將物件作為 keys,因此您可以使用此斷言來執行深度比較。您也可以提供一個單一物件,而不是一個 keys 陣列,其 keys 將被用作預期的 keys 組。

ts
import { assert, test } from 'vitest'

test('assert.doesNotHaveAnyDeepKeys', () => {
  assert.doesNotHaveAnyDeepKeys(new Map([[{ one: 'one' }, 'valueOne'], [1, 2]]), { thisDoesNot: 'exist' })
  assert.doesNotHaveAnyDeepKeys(new Map([[{ one: 'one' }, 'valueOne'], [{ two: 'two' }, 'valueTwo']]), [{ twenty: 'twenty' }, { fifty: 'fifty' }])
  assert.doesNotHaveAnyDeepKeys(new Set([{ one: 'one' }, { two: 'two' }]), { twenty: 'twenty' })
  assert.doesNotHaveAnyDeepKeys(new Set([{ one: 'one' }, { two: 'two' }]), [{ twenty: 'twenty' }, { fifty: 'fifty' }])
})

doesNotHaveAllDeepKeys

  • 類型: <T>(object: T, keys: Array<Object | string> | { [key: string]: any }, message?: string) => void

斷言 object 至少沒有其中一個提供的 keys。由於 Sets 和 Maps 可以將物件作為 keys,因此您可以使用此斷言來執行深度比較。您也可以提供一個單一物件,而不是一個 keys 陣列,其 keys 將被用作預期的 keys 組。

ts
import { assert, test } from 'vitest'

test('assert.doesNotHaveAllDeepKeys', () => {
  assert.doesNotHaveAllDeepKeys(new Map([[{ one: 'one' }, 'valueOne'], [1, 2]]), { thisDoesNot: 'exist' })
  assert.doesNotHaveAllDeepKeys(new Map([[{ one: 'one' }, 'valueOne'], [{ two: 'two' }, 'valueTwo']]), [{ twenty: 'twenty' }, { one: 'one' }])
  assert.doesNotHaveAllDeepKeys(new Set([{ one: 'one' }, { two: 'two' }]), { twenty: 'twenty' })
  assert.doesNotHaveAllDeepKeys(new Set([{ one: 'one' }, { two: 'two' }]), [{ one: 'one' }, { fifty: 'fifty' }])
})

throws

  • 類型
    • (fn: () => void, errMsgMatcher?: RegExp | string, ignored?: any, message?: string) => void
    • (fn: () => void, errorLike?: ErrorConstructor | Error | null, errMsgMatcher?: RegExp | string | null, message?: string) => void
  • 別名
    • throw
    • Throw

如果 errorLike 是 Error 建構函式,則斷言 fn 會擲出一個錯誤,而該錯誤是 errorLike 的執行個體。如果 errorLike 是 Error 執行個體,則斷言擲出的錯誤與 errorLike 是同一個執行個體。如果提供 errMsgMatcher,則它也會斷言擲出的錯誤訊息會符合 errMsgMatcher

ts
import { assert, test } from 'vitest'

test('assert.throws', () => {
  assert.throws(fn, 'Error thrown must have this msg')
  assert.throws(fn, /Error thrown must have a msg that matches this/)
  assert.throws(fn, ReferenceError)
  assert.throws(fn, errorInstance)
  assert.throws(fn, ReferenceError, 'Error thrown must be a ReferenceError and have this msg')
  assert.throws(fn, errorInstance, 'Error thrown must be the same errorInstance and have this msg')
  assert.throws(fn, ReferenceError, /Error thrown must be a ReferenceError and match this/)
  assert.throws(fn, errorInstance, /Error thrown must be the same errorInstance and match this/)
})

doesNotThrow

  • 類型: (fn: () => void, errMsgMatcher?: RegExp | string, ignored?: any, message?: string) => void
  • 類型: (fn: () => void, errorLike?: ErrorConstructor | Error | null, errMsgMatcher?: RegExp | string | null, message?: string) => void

如果 errorLike 是 Error 建構函式,則斷言 fn 不會 擲出一個錯誤,而該錯誤是 errorLike 的執行個體。如果 errorLike 是 Error 執行個體,則斷言擲出的錯誤與 errorLike 不是 同一個執行個體。如果提供 errMsgMatcher,則它也會斷言擲出的錯誤訊息不會符合 errMsgMatcher

ts
import { assert, test } from 'vitest'

test('assert.doesNotThrow', () => {
  assert.doesNotThrow(fn, 'Any Error thrown must not have this message')
  assert.doesNotThrow(fn, /Any Error thrown must not match this/)
  assert.doesNotThrow(fn, Error)
  assert.doesNotThrow(fn, errorInstance)
  assert.doesNotThrow(fn, Error, 'Error must not have this message')
  assert.doesNotThrow(fn, errorInstance, 'Error must not have this message')
  assert.doesNotThrow(fn, Error, /Error must not match this/)
  assert.doesNotThrow(fn, errorInstance, /Error must not match this/)
})

operator

  • 類型: (val1: OperatorComparable, operator: Operator, val2: OperatorComparable, message?: string) => void

使用 operator 比較 val1val2

ts
import { assert, test } from 'vitest'

test('assert.operator', () => {
  assert.operator(1, '<', 2, 'everything is ok')
})

closeTo

  • 類型: (actual: number, expected: number, delta: number, message?: string) => void
  • 別名: approximately

斷言 actual 等於 expected,範圍在 +/- delta 內。

ts
import { assert, test } from 'vitest'

test('assert.closeTo', () => {
  assert.closeTo(1.5, 1, 0.5, 'numbers are close')
})

sameMembers

  • 類型: <T>(set1: T[], set2: T[], message?: string) => void

斷言 set1set2 在任何順序下都有相同的成員。使用嚴格相等性檢查 (===)。

ts
import { assert, test } from 'vitest'

test('assert.sameMembers', () => {
  assert.sameMembers([1, 2, 3], [2, 1, 3], 'same members')
})

notSameMembers

  • 類型: <T>(set1: T[], set2: T[], message?: string) => void

斷言 set1set2 在任何順序下沒有相同的成員。使用嚴格相等性檢查 (===)。

ts
import { assert, test } from 'vitest'

test('assert.sameMembers', () => {
  assert.notSameMembers([1, 2, 3], [5, 1, 3], 'not same members')
})

sameDeepMembers

  • 類型: <T>(set1: T[], set2: T[], message?: string) => void

斷言 set1set2 在任何順序下都有相同的成員。使用深入相等性檢查。

ts
import { assert, test } from 'vitest'

test('assert.sameDeepMembers', () => {
  assert.sameDeepMembers([{ a: 1 }, { b: 2 }, { c: 3 }], [{ b: 2 }, { a: 1 }, { c: 3 }], 'same deep members')
})

notSameDeepMembers

  • 類型: <T>(set1: T[], set2: T[], message?: string) => void

斷言 set1set2 在任何順序下沒有相同的成員。使用深入相等性檢查。

ts
import { assert, test } from 'vitest'

test('assert.sameDeepMembers', () => {
  assert.sameDeepMembers([{ a: 1 }, { b: 2 }, { c: 3 }], [{ b: 2 }, { a: 1 }, { c: 3 }], 'same deep members')
})

sameOrderedMembers

  • 類型: <T>(set1: T[], set2: T[], message?: string) => void

聲稱 set1set2 在相同的順序中具有相同的成員。使用嚴格相等檢查 (===)。

ts
import { assert, test } from 'vitest'

test('assert.sameOrderedMembers', () => {
  assert.sameOrderedMembers([1, 2, 3], [1, 2, 3], 'same ordered members')
})

notSameOrderedMembers

  • 類型: <T>(set1: T[], set2: T[], message?: string) => void

聲稱 set1set2 在相同的順序中具有相同的成員。使用嚴格相等檢查 (===)。

ts
import { assert, test } from 'vitest'

test('assert.notSameOrderedMembers', () => {
  assert.notSameOrderedMembers([1, 2, 3], [2, 1, 3], 'not same ordered members')
})

sameDeepOrderedMembers

  • 類型: <T>(set1: T[], set2: T[], message?: string) => void

聲稱 set1set2 在相同的順序中具有相同的成員。使用深度相等檢查。

ts
import { assert, test } from 'vitest'

test('assert.sameDeepOrderedMembers', () => {
  assert.sameDeepOrderedMembers([{ a: 1 }, { b: 2 }, { c: 3 }], [{ a: 1 }, { b: 2 }, { c: 3 }], 'same deep ordered members')
})

notSameDeepOrderedMembers

  • 類型: <T>(set1: T[], set2: T[], message?: string) => void

聲稱 set1set2 在相同的順序中沒有相同的成員。使用深度相等檢查。

ts
import { assert, test } from 'vitest'

test('assert.notSameDeepOrderedMembers', () => {
  assert.notSameDeepOrderedMembers([{ a: 1 }, { b: 2 }, { c: 3 }], [{ a: 1 }, { b: 2 }, { z: 5 }], 'not same deep ordered members')
  assert.notSameDeepOrderedMembers([{ a: 1 }, { b: 2 }, { c: 3 }], [{ b: 2 }, { a: 1 }, { c: 3 }], 'not same deep ordered members')
})

includeMembers

  • 類型: <T>(superset: T[], subset: T[], message?: string) => void

聲稱 subset 以任何順序包含在 superset 中。使用嚴格相等檢查 (===)。忽略重複項。

ts
import { assert, test } from 'vitest'

test('assert.includeMembers', () => {
  assert.includeMembers([1, 2, 3], [2, 1, 2], 'include members')
})

notIncludeMembers

  • 類型: <T>(superset: T[], subset: T[], message?: string) => void

聲稱 subset 以任何順序都不包含在 superset 中。使用嚴格相等檢查 (===)。忽略重複項。

ts
import { assert, test } from 'vitest'

test('assert.notIncludeMembers', () => {
  assert.notIncludeMembers([1, 2, 3], [5, 1], 'not include members')
})

includeDeepMembers

  • 類型: <T>(superset: T[], subset: T[], message?: string) => void

聲稱 subset 以任何順序包含在 superset 中。使用深度相等檢查。忽略重複項。

ts
import { assert, test } from 'vitest'

test('assert.includeDeepMembers', () => {
  assert.includeDeepMembers([{ a: 1 }, { b: 2 }, { c: 3 }], [{ b: 2 }, { a: 1 }, { b: 2 }], 'include deep members')
})

notIncludeDeepMembers

  • 類型: <T>(superset: T[], subset: T[], message?: string) => void

聲稱 subset 以任何順序都不包含在 superset 中。使用深度相等檢查。忽略重複項。

ts
import { assert, test } from 'vitest'

test('assert.notIncludeDeepMembers', () => {
  assert.notIncludeDeepMembers([{ a: 1 }, { b: 2 }, { c: 3 }], [{ b: 2 }, { f: 5 }], 'not include deep members')
})

includeOrderedMembers

  • 類型: <T>(superset: T[], subset: T[], message?: string) => void

聲稱 subset 以相同的順序包含在 superset 中,從 superset 中的第一個元素開始。使用嚴格相等檢查 (===)。

ts
import { assert, test } from 'vitest'

test('assert.includeOrderedMembers', () => {
  assert.includeOrderedMembers([1, 2, 3], [1, 2], 'include ordered members')
})

notIncludeOrderedMembers

  • 類型: <T>(superset: T[], subset: T[], message?: string) => void

聲稱 subset 以相同的順序不包含在 superset 中,從 superset 中的第一個元素開始。使用嚴格相等檢查 (===)。

ts
import { assert, test } from 'vitest'

test('assert.notIncludeOrderedMembers', () => {
  assert.notIncludeOrderedMembers([1, 2, 3], [2, 1], 'not include ordered members')
  assert.notIncludeOrderedMembers([1, 2, 3], [2, 3], 'not include ordered members')
})

includeDeepOrderedMembers

  • 類型: <T>(superset: T[], subset: T[], message?: string) => void

聲稱 subset 以相同的順序包含在 superset 中,從 superset 中的第一個元素開始。使用深度相等檢查。

ts
import { assert, test } from 'vitest'

test('assert.includeDeepOrderedMembers', () => {
  assert.includeDeepOrderedMembers([{ a: 1 }, { b: 2 }, { c: 3 }], [{ a: 1 }, { b: 2 }], 'include deep ordered members')
})

notIncludeDeepOrderedMembers

  • 類型: <T>(superset: T[], subset: T[], message?: string) => void

斷言 subset 未包含在 superset 中,且順序與 superset 中的第一個元素相同。使用深度相等性檢查。

ts
import { assert, test } from 'vitest'

test('assert.includeDeepOrderedMembers', () => {
  assert.notIncludeDeepOrderedMembers([{ a: 1 }, { b: 2 }, { c: 3 }], [{ a: 1 }, { f: 5 }], 'not include deep ordered members')
  assert.notIncludeDeepOrderedMembers([{ a: 1 }, { b: 2 }, { c: 3 }], [{ b: 2 }, { a: 1 }], 'not include deep ordered members')
  assert.notIncludeDeepOrderedMembers([{ a: 1 }, { b: 2 }, { c: 3 }], [{ b: 2 }, { c: 3 }], 'not include deep ordered members')
})

oneOf

  • 類型: <T>(inList: T, list: T[], message?: string) => void

斷言非物件、非陣列值 inList 出現在平面陣列 list 中。

ts
import { assert, test } from 'vitest'

test('assert.oneOf', () => {
  assert.oneOf(1, [2, 1], 'Not found in list')
})

changes

  • 類型: <T>(modifier: Function, object: T, property: string, message?: string) => void

斷言 modifier 會變更 propertyobject

ts
import { assert, test } from 'vitest'

test('assert.changes', () => {
  const obj = { val: 10 }
  function fn() { obj.val = 22 };
  assert.changes(fn, obj, 'val')
})

changesBy

  • 類型: <T>(modifier: Function, object: T, property: string, change: number, message?: string) => void

斷言 modifier 會將 propertyobject 變更為 change

ts
import { assert, test } from 'vitest'

test('assert.changesBy', () => {
  const obj = { val: 10 }
  function fn() { obj.val += 2 };
  assert.changesBy(fn, obj, 'val', 2)
})

doesNotChange

  • 類型: <T>(modifier: Function, object: T, property: string, message?: string) => void

斷言 modifier 不會變更 propertyobject

ts
import { assert, test } from 'vitest'

test('assert.doesNotChange', () => {
  const obj = { val: 10 }
  function fn() { obj.val += 2 };
  assert.doesNotChange(fn, obj, 'val', 2)
})

changesButNotBy

  • 類型: <T>(modifier: Function, object: T, property: string, change:number, message?: string) => void

斷言 modifier 不會將 propertyobjectmodifier 傳回值變更為 change

ts
import { assert, test } from 'vitest'

test('assert.changesButNotBy', () => {
  const obj = { val: 10 }
  function fn() { obj.val += 10 };
  assert.changesButNotBy(fn, obj, 'val', 5)
})

increases

  • 類型: <T>(modifier: Function, object: T, property: string, message?: string) => void

斷言 modifier 會增加數值 objectproperty

ts
import { assert, test } from 'vitest'

test('assert.increases', () => {
  const obj = { val: 10 }
  function fn() { obj.val = 13 };
  assert.increases(fn, obj, 'val')
})

increasesBy

  • 類型: <T>(modifier: Function, object: T, property: string, change: number, message?: string) => void

斷言 modifier 會將數值 objectpropertymodifier 傳回值增加 change

ts
import { assert, test } from 'vitest'

test('assert.increases', () => {
  const obj = { val: 10 }
  function fn() { obj.val += 10 };
  assert.increases(fn, obj, 'val', 10)
})

doesNotIncrease

  • 類型: <T>(modifier: Function, object: T, property: string, message?: string) => void

斷言 modifier 沒有增加數值 objectproperty

ts
import { assert, test } from 'vitest'

test('assert.doesNotIncrease', () => {
  const obj = { val: 10 }
  function fn() { obj.val = 8 }
  assert.doesNotIncrease(fn, obj, 'val')
})

increasesButNotBy

  • 類型: <T>(modifier: Function, object: T, property: string, change: number, message?: string) => void

斷言 modifier 沒有將數值 objectpropertymodifier 傳回值增加 change

ts
import { assert, test } from 'vitest'

test('assert.increasesButNotBy', () => {
  const obj = { val: 10 }
  function fn() { obj.val += 15 };
  assert.increasesButNotBy(fn, obj, 'val', 10)
})

decreases

  • 類型: <T>(modifier: Function, object: T, property: string, message?: string) => void

斷言 modifier 會減少數值 objectproperty

ts
import { assert, test } from 'vitest'

test('assert.decreases', () => {
  const obj = { val: 10 }
  function fn() { obj.val = 5 };
  assert.decreases(fn, obj, 'val')
})

decreasesBy

  • 類型: <T>(modifier: Function, object: T, property: string, change: number, message?: string) => void

斷言modifier會將數字objectpropertymodifier傳回值減少change

ts
import { assert, test } from 'vitest'

test('assert.decreasesBy', () => {
  const obj = { val: 10 }
  function fn() { obj.val -= 5 };
  assert.decreasesBy(fn, obj, 'val', 5)
})

doesNotDecrease

  • 類型: <T>(modifier: Function, object: T, property: string, message?: string) => void

斷言modifier不會減少數字objectproperty

ts
import { assert, test } from 'vitest'

test('assert.doesNotDecrease', () => {
  const obj = { val: 10 }
  function fn() { obj.val = 15 }
  assert.doesNotDecrease(fn, obj, 'val')
})

doesNotDecreaseBy

  • 類型: <T>(modifier: Function, object: T, property: string, change: number, message?: string) => void

斷言modifier不會將數字objectpropertymodifier傳回值減少change

ts
import { assert, test } from 'vitest'

test('assert.doesNotDecreaseBy', () => {
  const obj = { val: 10 }
  function fn() { obj.val = 5 };
  assert.doesNotDecreaseBy(fn, obj, 'val', 1)
})

decreasesButNotBy

  • 類型: <T>(modifier: Function, object: T, property: string, change: number, message?: string) => void

斷言modifier不會將數字objectpropertymodifier傳回值減少change

ts
import { assert, test } from 'vitest'

test('assert.decreasesButNotBy', () => {
  const obj = { val: 10 }
  function fn() { obj.val = 5 };
  assert.decreasesButNotBy(fn, obj, 'val', 1)
})

ifError

  • 類型:<T>(object: T, message?: string) => void

如果object不是 false 值,則斷言,如果它是 true 值,則擲回。新增此功能,讓 chai 可取代 Node 的 assert 類別。

ts
import { assert, test } from 'vitest'

test('assert.ifError', () => {
  const err = new Error('I am a custom error')
  assert.ifError(err) // Rethrows err!
})

isExtensible

  • 類型:<T>(object: T, message?: string) => void
  • 別名:extensible

斷言object是可以擴充的(可以新增新的屬性)。

ts
import { assert, test } from 'vitest'

test('assert.isExtensible', () => {
  assert.isExtensible({})
})

isNotExtensible

  • 類型:<T>(object: T, message?: string) => void
  • 別名:notExtensible

斷言object是不可擴充的(無法新增新的屬性)。

ts
import { assert, test } from 'vitest'

test('assert.isNotExtensible', () => {
  const nonExtensibleObject = Object.preventExtensions({})
  const sealedObject = Object.seal({})
  const frozenObject = Object.freeze({})

  assert.isNotExtensible(nonExtensibleObject)
  assert.isNotExtensible(sealedObject)
  assert.isNotExtensible(frozenObject)
})

isSealed

  • 類型:<T>(object: T, message?: string) => void
  • 別名:sealed

斷言object是已封存的(無法新增新的屬性,也無法移除現有的屬性)。

ts
import { assert, test } from 'vitest'

test('assert.isSealed', () => {
  const sealedObject = Object.seal({})
  const frozenObject = Object.seal({})

  assert.isSealed(sealedObject)
  assert.isSealed(frozenObject)
})

isNotSealed

  • 類型:<T>(object: T, message?: string) => void
  • 別名:notSealed

斷言object是未封存的(可以新增新的屬性,也可以移除現有的屬性)。

ts
import { assert, test } from 'vitest'

test('assert.isNotSealed', () => {
  assert.isNotSealed({})
})

isFrozen

  • 類型:<T>(object: T, message?: string) => void
  • 別名:frozen

斷言物件已凍結(無法新增新的屬性,也無法修改現有的屬性)。

ts
import { assert, test } from 'vitest'

test('assert.isFrozen', () => {
  const frozenObject = Object.freeze({})
  assert.frozen(frozenObject)
})

isNotFrozen

  • 類型:<T>(object: T, message?: string) => void
  • 別名:notFrozen

斷言object是未凍結的(可以新增新的屬性,也可以修改現有的屬性)。

ts
import { assert, test } from 'vitest'

test('assert.isNotFrozen', () => {
  assert.isNotFrozen({})
})

isEmpty

  • 類型:<T>(target: T, message?: string) => void
  • 別名:empty

斷言target不包含任何值。對於陣列和字串,它會檢查長度屬性。對於 Map 和 Set 執行個體,它會檢查大小屬性。對於非函式物件,它會取得其自身可列舉字串金鑰的數量。

ts
import { assert, test } from 'vitest'

test('assert.isEmpty', () => {
  assert.isEmpty([])
  assert.isEmpty('')
  assert.isEmpty(new Map())
  assert.isEmpty({})
})

isNotEmpty

  • 類型:<T>(object: T, message?: string) => void
  • 別名:notEmpty

斷言target包含值。對於陣列和字串,它會檢查長度屬性。對於 Map 和 Set 執行個體,它會檢查大小屬性。對於非函式物件,它會取得其自身可列舉字串金鑰的數量。

ts
import { assert, test } from 'vitest'

test('assert.isNotEmpty', () => {
  assert.isNotEmpty([1, 2])
  assert.isNotEmpty('34')
  assert.isNotEmpty(new Set([5, 6]))
  assert.isNotEmpty({ key: 7 })
})