This is a VSCode gist to generate an Apollo cache update resolver test for easy TDDing

apollo-resolver-test-snippet.json

	"TypeScript Apollo Resolver Test": {
		"prefix": "tart",
		"body": [
			"import { FetchResult } from 'apollo-link'",
			"import { DataProxy } from 'apollo-cache'",
			"import { createMockResolverArgs } from '@rg-dev/apollo/src/test-utils/resolvers.utils'",
			"",
			"afterEach(() => jest.clearAllMocks())",
			"",
			"test('it should ', () => {",
				"\tconst queryInCache = {}",
				"",
				"\tconst mutationPayload: FetchResult<> = {",
				"\t\tdata: {},",
				"\t}",
					"",
				"\tconst writeQuery: DataProxy.WriteQueryOptions<{}, {}> = {}",
					"",
				"\tconst readQueryMock = jest.fn(() => null)",
				"\tconst writeQueryMock = jest.fn()",
					"",
				"\tconst mockResolverArgs = createMockResolverArgs({ readQueryMock, writeQueryMock, mutationPayload })",
					"",
				"\t// yourResolver(mockResolverArgs)",
				"\texpect(readQueryMock).toHaveBeenCalledTimes(1)",
				"\texpect(writeQueryMock).toHaveBeenCalledTimes(1)",
				"\texpect(writeQueryMock).toHaveBeenCalledWith(writeQuery)",
			"})",
			"",
		]
	}