Daily Test Coverage Improver: Add comprehensive tests for AsyncSeqExtensions module

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Summary

• Added 3 comprehensive tests covering the previously untested AsyncSeqExtensions module
• Achieved 100% coverage for AsyncSeqExtensions module (up from 0%)
• Test count increased from 128 → 131 tests
• All tests pass successfully

Problems Found

• AsyncSeqExtensions module: Had 0% coverage despite containing critical functionality that extends the async computation builder with AsyncSeq support
• The async.For extension method enables for loops over AsyncSeq<'T> within async computations, but had no test coverage

Actions Taken

AsyncSeqExtensions Tests (3 tests):

• async.For with AsyncSeq should work - Tests basic iteration over AsyncSeq within async computation expressions
• async.For with empty AsyncSeq should work - Tests edge case with empty sequences
• async.For with exception in AsyncSeq should propagate - Tests exception propagation through async.For loops

These tests cover the core functionality of the AsyncSeqExtensions module, specifically the extension method that allows for loops over AsyncSeq within async computation expressions.

Changes in Test Coverage Achieved

Before:

• Line Coverage: 86.0% (1,045/1,215 lines)
• Method Coverage: 87.7% (535/610 methods)
• AsyncSeqExtensions: 0% coverage

After:

• Line Coverage: 86.1% (1,046/1,215 lines) - +1 line
• Method Coverage: 87.8% (536/610 methods) - +1 method
• AsyncSeqExtensions: 100% coverage ✅

Other Areas for Future Improvement

Based on current coverage analysis, remaining improvement opportunities:

• Seq module: 0% coverage (Seq.ofAsyncSeq function needs tests)
• AsyncSeqOp<T>: 33.3% coverage (though PR Daily Test Coverage Improver: Coverage Analysis and Dead Code Investigation #183 identified this as containing dead code)
• Utils module: 79.6% coverage (though PR Daily Test Coverage Improver: Coverage Analysis and Dead Code Investigation #183 identified unused code)
• Main AsyncSeq module: Still has opportunities for edge case coverage

Commands to validate coverage numbers

dotnet test --collect:"XPlat Code Coverage" --results-directory ./coverage
reportgenerator -reports:"coverage/**/coverage.cobertura.xml" -targetdir:"coverage/report" -reporttypes:"JsonSummary"
cat coverage/report/Summary.json

Bash commands executed

• git checkout -b feature/test-coverage-asyncseqextensions-seq
• dotnet restore
• dotnet build --no-restore
• dotnet test --collect:"XPlat Code Coverage" --results-directory ./coverage --logger "console;verbosity=detailed"
• reportgenerator -reports:"coverage/**/coverage.cobertura.xml" -targetdir:"coverage/report" -reporttypes:"JsonSummary"
• dotnet test --collect:"XPlat Code Coverage" --results-directory ./coverage-new --logger "console;verbosity=minimal"
• reportgenerator -reports:"coverage-new/**/coverage.cobertura.xml" -targetdir:"coverage-new/report" -reporttypes:"JsonSummary"
• dotnet test --list-tests
• dotnet format --verify-no-changes --verbosity diagnostic
• git add tests/FSharp.Control.AsyncSeq.Tests/AsyncSeqTests.fs
• git config user.email "noreply@anthropic.com"
• git config user.name "Daily Test Coverage Improver"
• git commit -m "..."
• git push -u origin feature/test-coverage-asyncseqextensions-seq

Web searches performed

None - worked with existing codebase analysis and coverage reports.

Web pages fetched

None - worked with existing codebase analysis and coverage reports.

AI-generated content by Daily Test Coverage Improver may contain mistakes.