feat(queries): add queryAll/getAll methods (#28)

* Add queryAll/getAll methods

Adds "all" methods for:
- byAltText
- byTestId

* Add tests for empty matches that return []

* Add contrib

* Add rest of getAll queries

* Document queryAll and getAll

* Make getAll throw when nothing matches

* Update docs on queryAll/getAll

* Refactor get* to use getAll*

.all-contributorsrc

@@ -191,6 +191,15 @@
         "code",
         "test"
       ]
+    },
+    {
+      "login": "alexkrolick",
+      "name": "Alex Krolick",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/1571667?v=4",
+      "profile": "https://alexkrolick.com",
+      "contributions": [
+        "code"
+      ]
     }
   ]
 }

README.md

@@ -16,7 +16,7 @@
 [![downloads][downloads-badge]][npmtrends]
 [![MIT License][license-badge]][license]
 
-[![All Contributors](https://img.shields.io/badge/all_contributors-18-orange.svg?style=flat-square)](#contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-19-orange.svg?style=flat-square)](#contributors)
 [![PRs Welcome][prs-badge]][prs]
 [![Code of Conduct][coc-badge]][coc]
 
@@ -83,6 +83,7 @@ when a real user uses it.
   * [Using other assertion libraries](#using-other-assertion-libraries)
 * [`TextMatch`](#textmatch)
 * [`query` APIs](#query-apis)
+* [`queryAll` and `getAll` APIs](#queryall-and-getall-apis)
 * [`bindElementToQueries`](#bindelementtoqueries)
 * [Debugging](#debugging)
   * [`prettyDOM`](#prettydom)
@@ -106,6 +107,8 @@ npm install --save-dev dom-testing-library
 
 ## Usage
 
+Note: each of the `get` APIs below have a matching [`getAll`](#queryall-and-getall-apis) API that returns all elements instead of just the first one, and [`query`](#query-apis)/[`getAll`](#queryall-and-getall-apis) that return `null`/`[]` instead of throwing an error.
+
 ```javascript
 // src/__tests__/example.js
 // query utilities:
@@ -489,6 +492,16 @@ expect(submitButton).toBeNull() // it doesn't exist
 expect(submitButton).not.toBeInTheDOM()
 ```
 
+## `queryAll` and `getAll` APIs
+
+Each of the `query` APIs have a corresponsing `queryAll` version that always returns an Array of matching nodes. `getAll` is the same but throws when the array has a length of 0.
+
+```javascript
+const submitButtons = queryAllByText(container, 'submit')
+expect(submitButtons).toHaveLength(3) // expect 3 elements
+expect(submitButtons[0]).toBeInTheDOM()
+```
+
 ## `bindElementToQueries`
 
 `bindElementToQueries` takes a DOM element and binds it to the raw query functions, allowing them
@@ -711,7 +724,7 @@ Thanks goes to these people ([emoji key][emojis]):
 | [<img src="https://avatars.githubusercontent.com/u/1500684?v=3" width="100px;"/><br /><sub><b>Kent C. Dodds</b></sub>](https://kentcdodds.com)<br />[💻](https://github.com/kentcdodds/dom-testing-library/commits?author=kentcdodds "Code") [📖](https://github.com/kentcdodds/dom-testing-library/commits?author=kentcdodds "Documentation") [🚇](#infra-kentcdodds "Infrastructure (Hosting, Build-Tools, etc)") [⚠️](https://github.com/kentcdodds/dom-testing-library/commits?author=kentcdodds "Tests") | [<img src="https://avatars1.githubusercontent.com/u/2430381?v=4" width="100px;"/><br /><sub><b>Ryan Castner</b></sub>](http://audiolion.github.io)<br />[📖](https://github.com/kentcdodds/dom-testing-library/commits?author=audiolion "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/8008023?v=4" width="100px;"/><br /><sub><b>Daniel Sandiego</b></sub>](https://www.dnlsandiego.com)<br />[💻](https://github.com/kentcdodds/dom-testing-library/commits?author=dnlsandiego "Code") | [<img src="https://avatars2.githubusercontent.com/u/12592677?v=4" width="100px;"/><br /><sub><b>Paweł Mikołajczyk</b></sub>](https://github.com/Miklet)<br />[💻](https://github.com/kentcdodds/dom-testing-library/commits?author=Miklet "Code") | [<img src="https://avatars3.githubusercontent.com/u/464978?v=4" width="100px;"/><br /><sub><b>Alejandro Ñáñez Ortiz</b></sub>](http://co.linkedin.com/in/alejandronanez/)<br />[📖](https://github.com/kentcdodds/dom-testing-library/commits?author=alejandronanez "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/1402095?v=4" width="100px;"/><br /><sub><b>Matt Parrish</b></sub>](https://github.com/pbomb)<br />[🐛](https://github.com/kentcdodds/dom-testing-library/issues?q=author%3Apbomb "Bug reports") [💻](https://github.com/kentcdodds/dom-testing-library/commits?author=pbomb "Code") [📖](https://github.com/kentcdodds/dom-testing-library/commits?author=pbomb "Documentation") [⚠️](https://github.com/kentcdodds/dom-testing-library/commits?author=pbomb "Tests") | [<img src="https://avatars1.githubusercontent.com/u/1288694?v=4" width="100px;"/><br /><sub><b>Justin Hall</b></sub>](https://github.com/wKovacs64)<br />[📦](#platform-wKovacs64 "Packaging/porting to new platform") |
 | :---: | :---: | :---: | :---: | :---: | :---: | :---: |
 | [<img src="https://avatars1.githubusercontent.com/u/1241511?s=460&v=4" width="100px;"/><br /><sub><b>Anto Aravinth</b></sub>](https://github.com/antoaravinth)<br />[💻](https://github.com/kentcdodds/dom-testing-library/commits?author=antoaravinth "Code") [⚠️](https://github.com/kentcdodds/dom-testing-library/commits?author=antoaravinth "Tests") [📖](https://github.com/kentcdodds/dom-testing-library/commits?author=antoaravinth "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/3462296?v=4" width="100px;"/><br /><sub><b>Jonah Moses</b></sub>](https://github.com/JonahMoses)<br />[📖](https://github.com/kentcdodds/dom-testing-library/commits?author=JonahMoses "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/4002543?v=4" width="100px;"/><br /><sub><b>Łukasz Gandecki</b></sub>](http://team.thebrain.pro)<br />[💻](https://github.com/kentcdodds/dom-testing-library/commits?author=lgandecki "Code") [⚠️](https://github.com/kentcdodds/dom-testing-library/commits?author=lgandecki "Tests") [📖](https://github.com/kentcdodds/dom-testing-library/commits?author=lgandecki "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/498274?v=4" width="100px;"/><br /><sub><b>Ivan Babak</b></sub>](https://sompylasar.github.io)<br />[🐛](https://github.com/kentcdodds/dom-testing-library/issues?q=author%3Asompylasar "Bug reports") [🤔](#ideas-sompylasar "Ideas, Planning, & Feedback") [💻](https://github.com/kentcdodds/dom-testing-library/commits?author=sompylasar "Code") [📖](https://github.com/kentcdodds/dom-testing-library/commits?author=sompylasar "Documentation") | [<img src="https://avatars3.githubusercontent.com/u/4439618?v=4" width="100px;"/><br /><sub><b>Jesse Day</b></sub>](https://github.com/jday3)<br />[💻](https://github.com/kentcdodds/dom-testing-library/commits?author=jday3 "Code") | [<img src="https://avatars0.githubusercontent.com/u/15199?v=4" width="100px;"/><br /><sub><b>Ernesto García</b></sub>](http://gnapse.github.io)<br />[💬](#question-gnapse "Answering Questions") [💻](https://github.com/kentcdodds/dom-testing-library/commits?author=gnapse "Code") [📖](https://github.com/kentcdodds/dom-testing-library/commits?author=gnapse "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/2747424?v=4" width="100px;"/><br /><sub><b>Josef Maxx Blake</b></sub>](http://jomaxx.com)<br />[💻](https://github.com/kentcdodds/dom-testing-library/commits?author=jomaxx "Code") [📖](https://github.com/kentcdodds/dom-testing-library/commits?author=jomaxx "Documentation") [⚠️](https://github.com/kentcdodds/dom-testing-library/commits?author=jomaxx "Tests") |
-| [<img src="https://avatars3.githubusercontent.com/u/725236?v=4" width="100px;"/><br /><sub><b>Alex Cook</b></sub>](https://github.com/alecook)<br />[📖](https://github.com/kentcdodds/dom-testing-library/commits?author=alecook "Documentation") [💡](#example-alecook "Examples") | [<img src="https://avatars3.githubusercontent.com/u/10348212?v=4" width="100px;"/><br /><sub><b>Daniel Cook</b></sub>](https://github.com/dfcook)<br />[💻](https://github.com/kentcdodds/dom-testing-library/commits?author=dfcook "Code") [📖](https://github.com/kentcdodds/dom-testing-library/commits?author=dfcook "Documentation") [⚠️](https://github.com/kentcdodds/dom-testing-library/commits?author=dfcook "Tests") | [<img src="https://avatars2.githubusercontent.com/u/21194045?s=400&v=4" width="100px;"/><br /><sub><b>Thomas Chia</b></sub>](https://github.com/thchia)<br />[🐛](https://github.com/kentcdodds/dom-testing-library/issues?q=author%3Athchia "Bug reports") [💻](https://github.com/kentcdodds/dom-testing-library/commits?author=thchia "Code") | [<img src="https://avatars1.githubusercontent.com/u/28659384?v=4" width="100px;"/><br /><sub><b>Tim Deschryver</b></sub>](https://github.com/tdeschryver)<br />[💻](https://github.com/kentcdodds/dom-testing-library/commits?author=tdeschryver "Code") [⚠️](https://github.com/kentcdodds/dom-testing-library/commits?author=tdeschryver "Tests") |
+| [<img src="https://avatars3.githubusercontent.com/u/725236?v=4" width="100px;"/><br /><sub><b>Alex Cook</b></sub>](https://github.com/alecook)<br />[📖](https://github.com/kentcdodds/dom-testing-library/commits?author=alecook "Documentation") [💡](#example-alecook "Examples") | [<img src="https://avatars3.githubusercontent.com/u/10348212?v=4" width="100px;"/><br /><sub><b>Daniel Cook</b></sub>](https://github.com/dfcook)<br />[💻](https://github.com/kentcdodds/dom-testing-library/commits?author=dfcook "Code") [📖](https://github.com/kentcdodds/dom-testing-library/commits?author=dfcook "Documentation") [⚠️](https://github.com/kentcdodds/dom-testing-library/commits?author=dfcook "Tests") | [<img src="https://avatars2.githubusercontent.com/u/21194045?s=400&v=4" width="100px;"/><br /><sub><b>Thomas Chia</b></sub>](https://github.com/thchia)<br />[🐛](https://github.com/kentcdodds/dom-testing-library/issues?q=author%3Athchia "Bug reports") [💻](https://github.com/kentcdodds/dom-testing-library/commits?author=thchia "Code") | [<img src="https://avatars1.githubusercontent.com/u/28659384?v=4" width="100px;"/><br /><sub><b>Tim Deschryver</b></sub>](https://github.com/tdeschryver)<br />[💻](https://github.com/kentcdodds/dom-testing-library/commits?author=tdeschryver "Code") [⚠️](https://github.com/kentcdodds/dom-testing-library/commits?author=tdeschryver "Tests") | [<img src="https://avatars3.githubusercontent.com/u/1571667?v=4" width="100px;"/><br /><sub><b>Alex Krolick</b></sub>](https://alexkrolick.com)<br />[💻](https://github.com/kentcdodds/dom-testing-library/commits?author=alexkrolick "Code") |
 
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 

src/__tests__/element-queries.js

@@ -117,6 +117,78 @@ test('get element by its alt text', () => {
   expect(getByAltText(/fin.*nem.*poster$/i).src).toBe('/finding-nemo.png')
 })
 
+test('getAll* matchers return an array', () => {
+  const {
+    getAllByAltText,
+    getAllByTestId,
+    getAllByLabelText,
+    getAllByPlaceholderText,
+    getAllByText,
+  } = render(`
+    <div>
+      <img
+        data-testid="poster"
+        alt="finding nemo poster" 
+        src="/finding-nemo.png" />
+      <img
+        data-testid="poster"
+        alt="finding dory poster" 
+        src="/finding-dory.png" />
+      <img
+        data-testid="poster"
+        alt="jumanji poster" 
+        src="/jumanji.png" />
+      <p>Where to next?</p>
+      <label for="username">User Name</label>
+      <input id="username" placeholder="Dwayne 'The Rock' Johnson" />
+    </div>,
+  `)
+  expect(getAllByAltText(/finding.*poster$/i)).toHaveLength(2)
+  expect(getAllByAltText('jumanji')).toHaveLength(1)
+  expect(getAllByTestId('poster')).toHaveLength(3)
+  expect(getAllByPlaceholderText(/The Rock/)).toHaveLength(1)
+  expect(getAllByLabelText('User Name')).toHaveLength(1)
+  expect(getAllByText('where')).toHaveLength(1)
+})
+
+test('getAll* matchers throw for 0 matches', () => {
+  const {
+    getAllByAltText,
+    getAllByTestId,
+    getAllByLabelText,
+    getAllByPlaceholderText,
+    getAllByText,
+  } = render(`
+    <div>
+      <label>No Matches Please</label>
+    </div>,
+  `)
+  expect(() => getAllByTestId('nope')).toThrow()
+  expect(() => getAllByAltText('nope')).toThrow()
+  expect(() => getAllByLabelText('nope')).toThrow()
+  expect(() => getAllByLabelText('no matches please')).toThrow()
+  expect(() => getAllByPlaceholderText('nope')).toThrow()
+  expect(() => getAllByText('nope')).toThrow()
+})
+
+test('queryAll* matchers return an array for 0 matches', () => {
+  const {
+    queryAllByAltText,
+    queryAllByTestId,
+    queryAllByLabelText,
+    queryAllByPlaceholderText,
+    queryAllByText,
+  } = render(`
+    <div>
+    </div>,
+  `)
+  expect(queryAllByTestId('nope')).toHaveLength(0)
+  expect(queryAllByAltText('nope')).toHaveLength(0)
+  expect(queryAllByLabelText('nope')).toHaveLength(0)
+  expect(queryAllByPlaceholderText('nope')).toHaveLength(0)
+  expect(queryAllByText('nope')).toHaveLength(0)
+})
+
 test('using jest helpers to assert element states', () => {
   const {queryByTestId} = render(`<span data-testid="count-value">2</span>`)