Schema-driven testing utilities

[alessbell]

Introduces a new testing utility currently in src/testing/core/schemaProxy.ts (name subject to change) which creates a Proxy object to a user-supplied schema, allowing users to set (and override) mock resolvers inline in their tests.

In combination with a terminating SchemaLink or MSW, this new API will allow users to write tests that more closely resemble how users actually use their applications, testing link chain code not previously possible with the MockedProvider approach of static response mocking and providing a way to define default scalar mocks.

This is a draft that makes use of utilities from @graphql-tools/mock which have been inlined with line references to the original MIT-licensed code, and with the license copied over alongside.

[changeset-bot]

🦋 Changeset detected

Latest commit: 614cd3f

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@apollo/client	Minor

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[github-actions]

size-limit report 📦

Path	Size
dist/apollo-client.min.cjs	38.58 KB (0%)
import { ApolloClient, InMemoryCache, HttpLink } from "dist/main.cjs"	46.44 KB (0%)
import { ApolloClient, InMemoryCache, HttpLink } from "dist/main.cjs" (production)	44 KB (0%)
import { ApolloClient, InMemoryCache, HttpLink } from "dist/index.js"	34.14 KB (0%)
import { ApolloClient, InMemoryCache, HttpLink } from "dist/index.js" (production)	32.02 KB (0%)
import { ApolloProvider } from "dist/react/index.js"	1.23 KB (0%)
import { ApolloProvider } from "dist/react/index.js" (production)	1.22 KB (0%)
import { useQuery } from "dist/react/index.js"	5.27 KB (0%)
import { useQuery } from "dist/react/index.js" (production)	4.35 KB (0%)
import { useLazyQuery } from "dist/react/index.js"	5.5 KB (0%)
import { useLazyQuery } from "dist/react/index.js" (production)	4.58 KB (0%)
import { useMutation } from "dist/react/index.js"	3.51 KB (0%)
import { useMutation } from "dist/react/index.js" (production)	2.73 KB (0%)
import { useSubscription } from "dist/react/index.js"	3.19 KB (0%)
import { useSubscription } from "dist/react/index.js" (production)	2.38 KB (0%)
import { useSuspenseQuery } from "dist/react/index.js"	5.44 KB (0%)
import { useSuspenseQuery } from "dist/react/index.js" (production)	4.11 KB (0%)
import { useBackgroundQuery } from "dist/react/index.js"	4.92 KB (0%)
import { useBackgroundQuery } from "dist/react/index.js" (production)	3.58 KB (0%)
import { useLoadableQuery } from "dist/react/index.js"	5.03 KB (0%)
import { useLoadableQuery } from "dist/react/index.js" (production)	3.69 KB (0%)
import { useReadQuery } from "dist/react/index.js"	3.17 KB (0%)
import { useReadQuery } from "dist/react/index.js" (production)	3.11 KB (0%)
import { useFragment } from "dist/react/index.js"	2.29 KB (0%)
import { useFragment } from "dist/react/index.js" (production)	2.23 KB (0%)

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[alessbell]

/release:pr

[github-actions]

A new release has been made for this PR. You can install it with:

npm i @apollo/[email protected]

[jerelmiller]

This is neat! I had one comment as something to think about, but otherwise I've got nothing else other than any feedback from Lenz. Really excited for this feature 🎉 🔥