Add tests for nested paging with XML-like structures

[Copilot]

This PR adds comprehensive tests for nested paging scenarios similar to XML structures, addressing the request to test nested paging functionality with XML-like data hierarchies.

Changes Made

Added three new test cases to packages/compiler/test/decorators/paging.test.ts:

1. Basic nested XML-like structure test

Tests a scenario similar to Azure Storage blob listing:

model BlobFlatListSegment {
  @pageItems
  blobItems: string[];
}

model ListBlobsFlatSegmentResponse {
  containerName: string;
  segment: BlobFlatListSegment;
  @continuationToken
  nextMarker?: string;
}

2. Deeply nested structure test

Tests paging properties across multiple levels of nesting:

model NestedResponse {
  data: {
    itemsContainer: ItemsContainer;
    paginationInfo: PaginationInfo;
  };
}

3. Complex Azure Storage-like scenario

Tests a comprehensive nested structure with metadata and proper XML-style hierarchy.

Validation

The tests verify that:

• @pageItems can be found in deeply nested structures (e.g., enumerationResults.segment.blobItems)
• @continuationToken can be found in complex nested responses (e.g., enumerationResults.nextMarker)
• Input continuation tokens are properly identified
• The paging operation parser correctly navigates nested object structures

All tests use TypeSpec models that represent the hierarchical structure mentioned in the original issue, demonstrating that nested paging works correctly with XML-like data structures that would be suitable for use with XML decorators like @Xml.name, @Xml.unwrapped, and @Xml.attribute.

Fixes #7797.

---

💬 Share your feedback on Copilot coding agent for the chance to win a $200 gift card! Click here to start the survey.

[catalinaperalta]

@copilot only add tests under the packages/http-specs directory. Remove the other tests you added.

[Copilot]

@copilot only add tests under the packages/http-specs directory. Remove the other tests you added.

Done! I've moved the nested paging tests to packages/http-specs/specs/payload/pageable/main.tsp and removed all tests from the compiler directory and XML files. The tests now follow the http-specs scenario format with @scenario and @scenarioDoc decorators. (ad2da38)