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Title: assert | Vitest

Open Graph Title: Vitest

Description: Next generation testing framework powered by Vite

Open Graph Description: Next generation testing framework powered by Vite

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Opengraph URL: https://vitest.dev/

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Domain: vitest.dev

theme-color#22FF84
authorVladimir, Anthony Fu, Ari Perkkiö, Hiroshi Ogawa, Patak, Joaquín Sánchez and Vitest contributors
og:imagehttps://vitest.dev/og.jpg
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Links:

Skip to contenthttps://vitest.dev/api/assert#VPContent
https://vitest.dev/
Guideshttps://vitest.dev/guide/
APIhttps://vitest.dev/api/test
Confighttps://vitest.dev/config/
Bloghttps://vitest.dev/blog
v4.1.9https://github.com/vitest-dev/vitest/releases/tag/v4.1.9
Releases Noteshttps://github.com/vitest-dev/vitest/releases
Contributinghttps://github.com/vitest-dev/vitest/blob/main/CONTRIBUTING.md
Teamhttps://vitest.dev/team
unreleasedhttps://main.vitest.dev/
v3.xhttps://v3.vitest.dev/
v2.xhttps://v2.vitest.dev/
v1.xhttps://v1.vitest.dev/
v0.xhttps://v0.vitest.dev/
简体中文https://cn.vitest.dev/api/assert
https://bsky.app/profile/vitest.dev
https://elk.zone/m.webtoo.ls/@vitest
https://chat.vitest.dev
https://github.com/vitest-dev/vitest
简体中文https://cn.vitest.dev/api/assert
https://bsky.app/profile/vitest.dev
https://elk.zone/m.webtoo.ls/@vitest
https://chat.vitest.dev
https://github.com/vitest-dev/vitest
Testhttps://vitest.dev/api/test
Describehttps://vitest.dev/api/describe
Hookshttps://vitest.dev/api/hooks
Mockshttps://vitest.dev/api/mock
Vi Utilityhttps://vitest.dev/api/vi
Expecthttps://vitest.dev/api/expect
ExpectTypeOfhttps://vitest.dev/api/expect-typeof
Asserthttps://vitest.dev/api/assert
AssertTypehttps://vitest.dev/api/assert-type
reacthttps://vitest.dev/api/browser/react
vuehttps://vitest.dev/api/browser/vue
sveltehttps://vitest.dev/api/browser/svelte
Contexthttps://vitest.dev/api/browser/context
Interactivityhttps://vitest.dev/api/browser/interactivity
Locatorshttps://vitest.dev/api/browser/locators
Assertionshttps://vitest.dev/api/browser/assertions
Commandshttps://vitest.dev/api/browser/commands
Vitesthttps://vitest.dev/api/advanced/vitest
TestProjecthttps://vitest.dev/api/advanced/test-project
TestSpecificationhttps://vitest.dev/api/advanced/test-specification
TestCasehttps://vitest.dev/api/advanced/test-case
TestSuitehttps://vitest.dev/api/advanced/test-suite
TestModulehttps://vitest.dev/api/advanced/test-module
TestCollectionhttps://vitest.dev/api/advanced/test-collection
VitestPluginhttps://vitest.dev/api/advanced/plugin
VitestRunnerhttps://vitest.dev/api/advanced/runner
Reporterhttps://vitest.dev/api/advanced/reporters
TaskMetahttps://vitest.dev/api/advanced/metadata
TestArtifacthttps://vitest.dev/api/advanced/artifacts
​https://vitest.dev/api/assert#assert
chaihttps://www.chaijs.com/api/assert/
​https://vitest.dev/api/assert#assert-1
​https://vitest.dev/api/assert#fail
​https://vitest.dev/api/assert#isok
​https://vitest.dev/api/assert#isnotok
​https://vitest.dev/api/assert#equal
​https://vitest.dev/api/assert#notequal
​https://vitest.dev/api/assert#strictequal
​https://vitest.dev/api/assert#deepequal
​https://vitest.dev/api/assert#notdeepequal
​https://vitest.dev/api/assert#isabove
​https://vitest.dev/api/assert#isatleast
​https://vitest.dev/api/assert#isbelow
​https://vitest.dev/api/assert#isatmost
​https://vitest.dev/api/assert#istrue
​https://vitest.dev/api/assert#isnottrue
​https://vitest.dev/api/assert#isfalse
​https://vitest.dev/api/assert#isnotfalse
​https://vitest.dev/api/assert#isnull
​https://vitest.dev/api/assert#isnotnull
​https://vitest.dev/api/assert#isnan
​https://vitest.dev/api/assert#isnotnan
​https://vitest.dev/api/assert#exists
​https://vitest.dev/api/assert#notexists
​https://vitest.dev/api/assert#isundefined
​https://vitest.dev/api/assert#isdefined
​https://vitest.dev/api/assert#isfunction
​https://vitest.dev/api/assert#isnotfunction
​https://vitest.dev/api/assert#isobject
​https://vitest.dev/api/assert#isnotobject
​https://vitest.dev/api/assert#isarray
​https://vitest.dev/api/assert#isnotarray
​https://vitest.dev/api/assert#isstring
​https://vitest.dev/api/assert#isnotstring
​https://vitest.dev/api/assert#isnumber
​https://vitest.dev/api/assert#isnotnumber
​https://vitest.dev/api/assert#isfinite
​https://vitest.dev/api/assert#isboolean
​https://vitest.dev/api/assert#isnotboolean
​https://vitest.dev/api/assert#typeof
​https://vitest.dev/api/assert#nottypeof
​https://vitest.dev/api/assert#instanceof
​https://vitest.dev/api/assert#notinstanceof
​https://vitest.dev/api/assert#include
​https://vitest.dev/api/assert#notinclude
​https://vitest.dev/api/assert#deepinclude
​https://vitest.dev/api/assert#notdeepinclude
​https://vitest.dev/api/assert#nestedinclude
​https://vitest.dev/api/assert#notnestedinclude
​https://vitest.dev/api/assert#deepnestedinclude
​https://vitest.dev/api/assert#notdeepnestedinclude
​https://vitest.dev/api/assert#owninclude
​https://vitest.dev/api/assert#notowninclude
​https://vitest.dev/api/assert#deepowninclude
​https://vitest.dev/api/assert#notdeepowninclude
​https://vitest.dev/api/assert#match
​https://vitest.dev/api/assert#notmatch
​https://vitest.dev/api/assert#property
​https://vitest.dev/api/assert#notproperty
​https://vitest.dev/api/assert#propertyval
​https://vitest.dev/api/assert#notpropertyval
​https://vitest.dev/api/assert#deeppropertyval
​https://vitest.dev/api/assert#notdeeppropertyval
​https://vitest.dev/api/assert#nestedproperty
​https://vitest.dev/api/assert#notnestedproperty
​https://vitest.dev/api/assert#nestedpropertyval
​https://vitest.dev/api/assert#notnestedpropertyval
​https://vitest.dev/api/assert#deepnestedpropertyval
​https://vitest.dev/api/assert#notdeepnestedpropertyval
​https://vitest.dev/api/assert#lengthof
​https://vitest.dev/api/assert#hasanykeys
​https://vitest.dev/api/assert#hasallkeys
​https://vitest.dev/api/assert#containsallkeys
​https://vitest.dev/api/assert#doesnothaveanykeys
​https://vitest.dev/api/assert#doesnothaveallkeys
​https://vitest.dev/api/assert#hasanydeepkeys
​https://vitest.dev/api/assert#hasalldeepkeys
​https://vitest.dev/api/assert#containsalldeepkeys
​https://vitest.dev/api/assert#doesnothaveanydeepkeys
​https://vitest.dev/api/assert#doesnothavealldeepkeys
​https://vitest.dev/api/assert#throws
​https://vitest.dev/api/assert#doesnotthrow
​https://vitest.dev/api/assert#operator
​https://vitest.dev/api/assert#closeto
​https://vitest.dev/api/assert#samemembers
​https://vitest.dev/api/assert#notsamemembers
​https://vitest.dev/api/assert#samedeepmembers
​https://vitest.dev/api/assert#notsamedeepmembers
​https://vitest.dev/api/assert#sameorderedmembers
​https://vitest.dev/api/assert#notsameorderedmembers
​https://vitest.dev/api/assert#samedeeporderedmembers
​https://vitest.dev/api/assert#notsamedeeporderedmembers
​https://vitest.dev/api/assert#includemembers
​https://vitest.dev/api/assert#notincludemembers
​https://vitest.dev/api/assert#includedeepmembers
​https://vitest.dev/api/assert#notincludedeepmembers
​https://vitest.dev/api/assert#includeorderedmembers
​https://vitest.dev/api/assert#notincludeorderedmembers
​https://vitest.dev/api/assert#includedeeporderedmembers
​https://vitest.dev/api/assert#notincludedeeporderedmembers
​https://vitest.dev/api/assert#oneof
​https://vitest.dev/api/assert#changes
​https://vitest.dev/api/assert#changesby
​https://vitest.dev/api/assert#doesnotchange
​https://vitest.dev/api/assert#changesbutnotby
​https://vitest.dev/api/assert#increases
​https://vitest.dev/api/assert#increasesby
​https://vitest.dev/api/assert#doesnotincrease
​https://vitest.dev/api/assert#increasesbutnotby
​https://vitest.dev/api/assert#decreases
​https://vitest.dev/api/assert#decreasesby
​https://vitest.dev/api/assert#doesnotdecrease
​https://vitest.dev/api/assert#doesnotdecreaseby
​https://vitest.dev/api/assert#decreasesbutnotby
​https://vitest.dev/api/assert#iferror
​https://vitest.dev/api/assert#isextensible
​https://vitest.dev/api/assert#isnotextensible
​https://vitest.dev/api/assert#issealed
​https://vitest.dev/api/assert#isnotsealed
​https://vitest.dev/api/assert#isfrozen
​https://vitest.dev/api/assert#isnotfrozen
​https://vitest.dev/api/assert#isempty
​https://vitest.dev/api/assert#isnotempty
Suggest changes to this pagehttps://github.com/vitest-dev/vitest/edit/main/docs/api/assert.md
Previous pageExpectTypeOfhttps://vitest.dev/api/expect-typeof
Next pageAssertTypehttps://vitest.dev/api/assert-type

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