react-testutils-additions

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react-testutils-additions

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A module that will extend the default react testutils with extra helpers that will make life easier when testing your react components.

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# react-testutils-additions
A module that will extend the default react testutils with extra helpers that will make life easier when testing your react components.

#### Features

##### Standard helpers from React Testutils 
The module contains all the existing helper functions that come with [React Testutils](https://facebook.github.io/react/docs/test-utils.html), so you can always fall back to the existing React API to test your components.
``` Javascript
var testUtilsAdditions = require("react-testutils-additions");

var component = testUtilsAdditions.renderIntoDocument(<Component />);
testUtilsAdditions.findRenderedDOMComponentWithClass(component, "myclassname");

```

##### Find API
By using the default React TestUtils API, finding components can be quite verbose, therefore I created a simpler API based on basic CSS selectors to find you components:

``` Javascript
var testUtilsAdditions = require("react-testutils-additions");

var component = testUtilsAdditions.renderIntoDocument(<Component />);

// If you want to find a component based their tag:
testUtilsAdditions.find(component, "div");

// If you want to find a component by it's classname:
testUtilsAdditions.find(component, ".myclass");

// If you want to find a component by it's id:
testUtilsAdditions.find(component, "#myid");

// You can even combine the selectors, just like you do with CSS
testUtilsAdditions.find(component, "#myid div .myclassname");

// You can also use css "AND" operators:
testUtilsAdditions.find(component, "li#id.myclassname");

// If you want to find one component based on a selector:
testUtilsAdditions.findOne(component, ".myclass"); // If more is found, this will throw!
```

##### findRenderedDOMComponentWithId
The default React Testutils don't support finding components based on an id, so I extended the TestUtils with a helper for that.

``` Javascript
var testUtilsAdditions = require("react-testutils-additions");

var component = testUtilsAdditions.renderIntoDocument(<Component />);
testUtilsAdditions.findRenderedDOMComponentWithId(component, "myid");

```
There is no scry helper for it, because an Id should always be unique per document.

##### scryRenderedDOMComponentsWithAttributeValue
To look for components based on an attribute value, use the scryRenderedDOMComponentsWithAttributeValue helper.

``` Javascript
var testUtilsAdditions = require("react-testutils-additions");

var component = testUtilsAdditions.renderIntoDocument(<Component />);
testUtilsAdditions.scryRenderedDOMComponentsWithAttributeValue(component, "role" "myrole");

```

##### findRenderedDOMComponentWithAttributeValue
To look for a component based on an attribute value, use the findRenderedDOMComponentWithAttributeValue helper.

``` Javascript
var testUtilsAdditions = require("react-testutils-additions");

var component = testUtilsAdditions.renderIntoDocument(<Component />);
testUtilsAdditions.findRenderedDOMComponentWithAttributeValue(component, "role" "myrole");

```

##### updateProps
The componentWillReceiveProps function is called by the parent component, which makes it hard to test. Therefore I created the renderIntoTestContainer helper that wraps your component in a container with a updateProps function on it.

``` Javascript
var testUtilsAdditions = require("react-testutils-additions");

var wrappedComponent = testUtilsAdditions.renderIntoTestContainer(<Component />);
wrappedComponent.updateProps({ myProperty: "new value" })
```

##### unmountFromDocument
React TestUtils comes with a helper to render a component into a document (it actually does not render it into a document, but ok...).
If you want to clean up your tests, use the unmountFromDocument helper:

``` Javascript
var testUtilsAdditions = require("react-testutils-additions");

var component = testUtilsAdditions.renderIntoDocument(<Component />);
testUtilsAdditions.unmountFromDocument(component); // this will remove the component, and call the componentWillUnmount function of your component.
```

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