Should i wait for apollo

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Vendor Search Search Icon. Filter Icon. Clear checkbox label label. Apply Cancel. Consent Leg. This will fire off the mutation, and then the rest will be tested identically to the useQuery based component. Note: Other test utilities like Enzyme and react-testing-library have built-in tools for finding elements and simulating events, but the concept is the same: find the button and simulate a click on it.

To test for a successful mutation after simulating the click, the fulfilled Promise from MockedProvider can be checked for the appropriate confirmation message, just like the useQuery based component:.

The result in a mocked mutation may be a function rather than an object. This gives you a simple way to check that a mutation has been called:. For the sake of simplicity, the error case for mutations hasn't been shown here, but testing useMutation errors is exactly the same as testing useQuery errors: just add an error to the mock, fire the mutation, and check the UI for error messages. Testing UI components isn't a simple issue, but hopefully these tools will create confidence when testing components that are dependent on data.

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These cookies may be set through our site by our advertising partners. They may be used by those companies to build a profile of your interests and show you relevant adverts on other sites. They do not store directly personal information, but are based on uniquely identifying your browser and internet device. If you do not allow these cookies, you will experience less targeted advertising.

This website uses cookies to ensure you receive the best possible experience. Other test utilities like Enzyme and react-testing-library have built-in tools for finding elements and simulating events, but the concept is the same: find the button and simulate a click on it.

To test for a successful mutation after simulating the click, use a zero-millisecond timeout, as shown in Testing the "success" state :. Remember that the mock's value for result can also be a function, so you can perform arbitrary logic like setting a boolean to indicate that the mutation completed before returning its result. Testing error states for mutations is identical to testing them for queries.. If your application sets any cache configuration options such as possibleTypes or typePolicies , you should provide MockedProvider with an instance of InMemoryCache that sets the exact same options:.

The following sample specifies possibleTypes and typePolicies in its cache configuration, both of which must also be specified in relevant tests to prevent unexpected behavior. For a working example that demonstrates how to test components, check out this project on CodeSandbox:. These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms.

You can set your browser to block or alert you about these cookies, but some parts of the site will not then work. These cookies do not store any personally identifiable information. These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site.

They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance. These cookies enable the website to provide enhanced functionality and personalisation.

They may be set by us or by third party providers whose services we have added to our pages. If you do not allow these cookies then some or all of these services may not function properly. These cookies may be set through our site by our advertising partners. They may be used by those companies to build a profile of your interests and show you relevant adverts on other sites. These cookies are necessary for the website to function and cannot be switched off in our systems.

They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms.

You can set your browser to block or alert you about these cookies, but some parts of the site will not then work. These cookies do not store any personally identifiable information. These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous.

If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance. These cookies enable the website to provide enhanced functionality and personalisation.

They may be set by us or by third party providers whose services we have added to our pages. If you do not allow these cookies then some or all of these services may not function properly. These cookies may be set through our site by our advertising partners. They may be used by those companies to build a profile of your interests and show you relevant adverts on other sites. They do not store directly personal information, but are based on uniquely identifying your browser and internet device.

If you do not allow these cookies, you will experience less targeted advertising. This website uses cookies to ensure you receive the best possible experience. Learn More. Server-side rendering. Click to expand.