[ApolloPagination] Load All Pages

[Iron-Ham]

What are you trying to accomplish?

Important

This pull request relies on #80, but I cannot point this branch to that branch and attempt to open it up as pull request in this repository (as I'm an unaffiliated contributor to the repository). As such, the overwhelming majority of commits on this branch are not part of this pull request; only the final 4 commits are the contents of this pull request.

I want consumers of the GraphQLPager to be able to load all pages at once, should they desire to do so.

What approach did you choose and why?

First, I modified the fetch function to follow async/await syntax. That's so that we can await its return prior to beginning to loop over loadMore.

Then, I implemented the function using a while loop.

Finally, I made additive changes to the MockGraphQLServer to support subsequent loads of this nature.

Anything you want to highlight for special attention from reviewers?

Yes: This doesn't work for ReversePagination -- and that's okay. ReversePagination is due for some re-working as part of apollographql/apollo-ios#3265

If something goes wrong, what are the mitigation strategies?

• Rollback - This change can only be disabled by reverting this pull request or commit.

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🤖 Generated by Copilot at 12d13bc

Summary

🧪🔄🔒

This pull request adds a new feature to the GraphQLQueryPager protocol and class, which allows loading all the pages of a paginated GraphQL query in one call. It also updates the tests and the mock GraphQL server to use the new feature and the async/await syntax. Additionally, it removes some unnecessary public modifiers from internal extensions.

Sing, O Muse, of the swift and skillful coder
Who added to the GraphQLQueryPager a wondrous feature
To load all pages of a query with one call, like a mighty river
That flows from the mountains to the sea, unstoppable and eager.

Walkthrough

• Add loadAll methods to AnyGraphQLPager and GraphQLQueryPager protocols and classes to allow loading all pages of a paginated query in one call
• Refactor GraphQLQueryPager.Actor class to use async/await syntax, initialFetchTask property, and isLoadingAll flag for pagination logic and cancellation handling
• Add test cases for AnyGraphQLQueryPager and ForwardPaginationTests using mock GraphQL server and expectations
• Add subscript operator to MockGraphQLServer class to access and set RequestExpectation objects for different operation types
• Modify FriendsQuery extension methods to use specific query instances with expected variables instead of generic operation type
• Remove unnecessary public modifiers from GraphQLQueryPager.Actor extensions in AnyGraphQLPager.swift and Pager+Convenience.swift files
• Move deinitializer after initializer and remove public modifier from initializer in GraphQLQueryPager class
• Add missing import statement to FriendsQuery+TestHelpers.swift file

[Iron-Ham]

Closing in favor of #115