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Add explicit expected GetByteLength assertions to tests - #105

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sator-imaging merged 3 commits into
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codex/add-expected-byte-length-assertions
Aug 30, 2026
Merged

Add explicit expected GetByteLength assertions to tests#105
sator-imaging merged 3 commits into
mainfrom
codex/add-expected-byte-length-assertions

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Motivation

  • Tests compared serialized writtenBytes with GetByteLength() but often lacked hard-coded expected byte-length values, reducing clarity on exact format sizes.
  • Add concrete expectations to make test intent explicit and catch regressions in layout/size calculations.

Description

  • Added explicit TestAssert.Equal(<expected>, view.GetByteLength(), ...) checks across tests/SerializationTests.cs for: VariableStructWithArrayAtEnd (non-null and null), VariableStructWithStringAtEnd (non-null and null), VariableStructWithBlittableStructAtEnd (non-null and null), VariableStructWithPrimitiveAtEnd (non-null and null), BlittableRecordStructContainer (non-null and null), and DuplicateInstanceContainer non-null case.
  • Added explicit GetByteLength() expectations to Unity compatibility checks in tests-unity/UnityCompatibility.cs for the nested blittable-record container non-null and null cases.
  • Preserved all existing assertions that compare the serialized writtenBytes with GetByteLength() so original coverage remains intact.

Testing

  • Ran repository checks and diffs to validate the patch applied cleanly and updated tests/SerializationTests.cs and tests-unity/UnityCompatibility.cs (changes applied successfully).
  • Attempted to run dotnet test --no-restore but the execution environment did not have the dotnet SDK available so full test execution could not be performed.
  • Performed source searches for GetByteLength() to confirm new assertions were added where intended; no build/runtime test failures were observed in this environment due to the missing SDK.

Codex Task

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Summary by CodeRabbit

  • Tests
    • Added serialization length checks for arrays, strings, primitive fields, nested structures, containers, and shared references.
    • Added coverage for both null and non-null values.
    • Added compatibility checks for nested blittable record-struct roundtrips.

Walkthrough

The tests now assert exact GetByteLength() results for serialized last fields, nested containers, null values, arrays, strings, nested blittable structs, primitive fields, and shared references.

Changes

Serialization byte-length verification

Layer / File(s) Summary
Last-field byte-length assertions
tests/SerializationTests.cs
The tests verify exact byte lengths for non-null and null array, string, nested blittable struct, and primitive last-field cases.
Nested and shared container lengths
tests/SerializationTests.cs, tests-unity/UnityCompatibility.cs
The tests verify exact byte lengths for nested containers, null-containing containers, and shared-reference containers.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Merge Risk: 🟡 Moderate · up to ab6d0

The PR adds explicit serialization-size expectations, but eight current values are four bytes too small and will cause the affected tests to fail. Merge should wait until those expected lengths are corrected.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 2 files. Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (4 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly and concisely describes the main change: adding explicit expected GetByteLength assertions to tests.
Description check ✅ Passed The description is directly related to the changes. It explains the motivation, covered tests, preserved assertions, and unavailable test environment.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
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🛠️ Fix failing CI checks 💡
  • Create stacked PR
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🧪 Generate unit tests (beta)
  • Create PR with unit tests
  • Commit unit tests in branch codex/add-expected-byte-length-assertions
✨ Simplify code
  • Create PR with simplified code
  • Commit simplified code in branch codex/add-expected-byte-length-assertions

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Actionable comments posted: 1

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Inline comments:
In `@tests/SerializationTests.cs`:
- Line 1024: Update the length assertions for VariableStructWithArrayAtEnd,
VariableStructWithStringAtEnd, VariableStructWithBlittableStructAtEnd, and
VariableStructWithPrimitiveAtEnd to include the 8-byte offset table and other
property payloads: use 28/12, 26/12, 28/14, and 26/12 respectively across the
affected tests.
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Run ID: b91aa63a-4f60-4c82-8dd9-47c2dc06b78e

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Reviewing files that changed from the base of the PR and between d7675d9 and ab6d0fe.

📒 Files selected for processing (2)
  • tests-unity/UnityCompatibility.cs
  • tests/SerializationTests.cs

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📜 Review details
⚠️ CI failures not shown inline (10)

GitHub Actions: Test / 0_generated-source-preview _ preview (Debug).txt: Add explicit expected GetByteLength assertions to tests

Conclusion: failure

View job details

##[group]Run generated_source_dir="/home/runner/work/_temp/generated/Debug"
 �[36;1mgenerated_source_dir="/home/runner/work/_temp/generated/Debug"�[0m
 �[36;1mmapfile -t generated_files < <(find "$generated_source_dir" -type f -name '*.cs' | sort)�[0m
 �[36;1m�[0m
 �[36;1mif [ "${`#generated_files`[@]}" -eq 0 ]; then�[0m
 �[36;1m  echo "No generated C# files were found in $generated_source_dir." >> "$GITHUB_STEP_SUMMARY"�[0m
 �[36;1m  exit 1�[0m
 �[36;1mfi�[0m
 �[36;1m�[0m
 �[36;1m{�[0m
 �[36;1m  for generated_file in "${generated_files[@]}"; do�[0m
 �[36;1m    file_name="$(basename "$generated_file")"�[0m
 �[36;1m    echo "<details>"�[0m
 �[36;1m    echo "<summary>$file_name</summary>"�[0m
 �[36;1m    echo�[0m
 �[36;1m    echo '```cs'�[0m
 �[36;1m    cat "$generated_file"�[0m
 �[36;1m    echo�[0m
 �[36;1m    echo '```'�[0m
 �[36;1m    echo�[0m
 �[36;1m    echo "</details>"�[0m
 �[36;1m    echo�[0m
 �[36;1m  done�[0m
 �[36;1m} >> "$GITHUB_STEP_SUMMARY"�[0m
 �[36;1m�[0m
 �[36;1mif grep -rn -i "// fallback" "$generated_source_dir"; then�[0m
 �[36;1m  echo "::error title=Fallback Detected::Fallback detected in generated C# sources!"�[0m

GitHub Actions: Test / generated-source-preview _ preview (Debug): Add explicit expected GetByteLength assertions to tests

Conclusion: failure

View job details

##[group]Run generated_source_dir="/home/runner/work/_temp/generated/Debug"
 �[36;1mgenerated_source_dir="/home/runner/work/_temp/generated/Debug"�[0m
 �[36;1mmapfile -t generated_files < <(find "$generated_source_dir" -type f -name '*.cs' | sort)�[0m
 �[36;1m�[0m
 �[36;1mif [ "${`#generated_files`[@]}" -eq 0 ]; then�[0m
 �[36;1m  echo "No generated C# files were found in $generated_source_dir." >> "$GITHUB_STEP_SUMMARY"�[0m
 �[36;1m  exit 1�[0m
 �[36;1mfi�[0m
 �[36;1m�[0m
 �[36;1m{�[0m
 �[36;1m  for generated_file in "${generated_files[@]}"; do�[0m
 �[36;1m    file_name="$(basename "$generated_file")"�[0m
 �[36;1m    echo "<details>"�[0m
 �[36;1m    echo "<summary>$file_name</summary>"�[0m
 �[36;1m    echo�[0m
 �[36;1m    echo '```cs'�[0m
 �[36;1m    cat "$generated_file"�[0m
 �[36;1m    echo�[0m
 �[36;1m    echo '```'�[0m
 �[36;1m    echo�[0m
 �[36;1m    echo "</details>"�[0m
 �[36;1m    echo�[0m
 �[36;1m  done�[0m
 �[36;1m} >> "$GITHUB_STEP_SUMMARY"�[0m
 �[36;1m�[0m
 �[36;1mif grep -rn -i "// fallback" "$generated_source_dir"; then�[0m
 �[36;1m  echo "::error title=Fallback Detected::Fallback detected in generated C# sources!"�[0m

GitHub Actions: Test / 1_generated-source-preview _ preview (Release).txt: Add explicit expected GetByteLength assertions to tests

Conclusion: failure

View job details

##[group]Run generated_source_dir="/home/runner/work/_temp/generated/Release"
 �[36;1mgenerated_source_dir="/home/runner/work/_temp/generated/Release"�[0m
 �[36;1mmapfile -t generated_files < <(find "$generated_source_dir" -type f -name '*.cs' | sort)�[0m
 �[36;1m�[0m
 �[36;1mif [ "${`#generated_files`[@]}" -eq 0 ]; then�[0m
 �[36;1m  echo "No generated C# files were found in $generated_source_dir." >> "$GITHUB_STEP_SUMMARY"�[0m
 �[36;1m  exit 1�[0m
 �[36;1mfi�[0m
 �[36;1m�[0m
 �[36;1m{�[0m
 �[36;1m  for generated_file in "${generated_files[@]}"; do�[0m
 �[36;1m    file_name="$(basename "$generated_file")"�[0m
 �[36;1m    echo "<details>"�[0m
 �[36;1m    echo "<summary>$file_name</summary>"�[0m
 �[36;1m    echo�[0m
 �[36;1m    echo '```cs'�[0m
 �[36;1m    cat "$generated_file"�[0m
 �[36;1m    echo�[0m
 �[36;1m    echo '```'�[0m
 �[36;1m    echo�[0m
 �[36;1m    echo "</details>"�[0m
 �[36;1m    echo�[0m
 �[36;1m  done�[0m
 �[36;1m} >> "$GITHUB_STEP_SUMMARY"�[0m
 �[36;1m�[0m
 �[36;1mif grep -rn -i "// fallback" "$generated_source_dir"; then�[0m
 �[36;1m  echo "::error title=Fallback Detected::Fallback detected in generated C# sources!"�[0m

GitHub Actions: Test / generated-source-preview _ preview (Release): Add explicit expected GetByteLength assertions to tests

Conclusion: failure

View job details

##[group]Run generated_source_dir="/home/runner/work/_temp/generated/Release"
 �[36;1mgenerated_source_dir="/home/runner/work/_temp/generated/Release"�[0m
 �[36;1mmapfile -t generated_files < <(find "$generated_source_dir" -type f -name '*.cs' | sort)�[0m
 �[36;1m�[0m
 �[36;1mif [ "${`#generated_files`[@]}" -eq 0 ]; then�[0m
 �[36;1m  echo "No generated C# files were found in $generated_source_dir." >> "$GITHUB_STEP_SUMMARY"�[0m
 �[36;1m  exit 1�[0m
 �[36;1mfi�[0m
 �[36;1m�[0m
 �[36;1m{�[0m
 �[36;1m  for generated_file in "${generated_files[@]}"; do�[0m
 �[36;1m    file_name="$(basename "$generated_file")"�[0m
 �[36;1m    echo "<details>"�[0m
 �[36;1m    echo "<summary>$file_name</summary>"�[0m
 �[36;1m    echo�[0m
 �[36;1m    echo '```cs'�[0m
 �[36;1m    cat "$generated_file"�[0m
 �[36;1m    echo�[0m
 �[36;1m    echo '```'�[0m
 �[36;1m    echo�[0m
 �[36;1m    echo "</details>"�[0m
 �[36;1m    echo�[0m
 �[36;1m  done�[0m
 �[36;1m} >> "$GITHUB_STEP_SUMMARY"�[0m
 �[36;1m�[0m
 �[36;1mif grep -rn -i "// fallback" "$generated_source_dir"; then�[0m
 �[36;1m  echo "::error title=Fallback Detected::Fallback detected in generated C# sources!"�[0m

GitHub Actions: Test / 2_test (Release).txt: Add explicit expected GetByteLength assertions to tests

Conclusion: failure

View job details

##[group]Run dotnet test -c Release --no-restore --no-build \
 �[36;1mdotnet test -c Release --no-restore --no-build \�[0m
 �[36;1m  > test-output.txt 2>&1�[0m
 �[36;1m�[0m
 �[36;1mgrep -E " - .*\.dll" test-output.txt >> $GITHUB_STEP_SUMMARY�[0m
 shell: /usr/bin/bash -e {0}
 env:
   DOTNET_ROOT: /usr/share/dotnet
 ##[endgroup]
 ##[error]Process completed with exit code 1.

GitHub Actions: Test / test (Release): Add explicit expected GetByteLength assertions to tests

Conclusion: failure

View job details

##[group]Run dotnet test -c Release --no-restore --no-build \
 �[36;1mdotnet test -c Release --no-restore --no-build \�[0m
 �[36;1m  > test-output.txt 2>&1�[0m
 �[36;1m�[0m
 �[36;1mgrep -E " - .*\.dll" test-output.txt >> $GITHUB_STEP_SUMMARY�[0m
 shell: /usr/bin/bash -e {0}
 env:
   DOTNET_ROOT: /usr/share/dotnet
 ##[endgroup]
 ##[error]Process completed with exit code 1.

GitHub Actions: Test / test (Release): Add explicit expected GetByteLength assertions to tests

Conclusion: failure

View job details

##[group]Run cat test-output.txt
 �[36;1mcat test-output.txt�[0m
 �[36;1mexit 1�[0m
 shell: /usr/bin/bash -e {0}
 env:
   DOTNET_ROOT: /usr/share/dotnet
 ##[endgroup]
 /home/runner/.nuget/packages/system.text.encodings.web/8.0.0/buildTransitive/netcoreapp2.0/System.Text.Encodings.Web.targets(4,5): warning : System.Text.Encodings.Web 8.0.0 doesn't support net5.0 and has not been tested with it. Consider upgrading your TargetFramework to net6.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [/home/runner/work/ZeroSerializer/ZeroSerializer/benchmark/ZeroSerializer.Benchmark.csproj::TargetFramework=net5.0]
 /home/runner/.nuget/packages/system.text.json/8.0.5/buildTransitive/netcoreapp2.0/System.Text.Json.targets(4,5): warning : System.Text.Json 8.0.5 doesn't support net5.0 and has not been tested with it. Consider upgrading your TargetFramework to net6.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [/home/runner/work/ZeroSerializer/ZeroSerializer/benchmark/ZeroSerializer.Benchmark.csproj::TargetFramework=net5.0]
 /home/runner/.nuget/packages/system.text.encoding.codepages/7.0.0/buildTransitive/netcoreapp2.0/System.Text.Encoding.CodePages.targets(4,5): warning : System.Text.Encoding.CodePages 7.0.0 doesn't support net5.0 and has not been tested with it. Consider upgrading your TargetFramework to net6.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [/home/runner/work/ZeroSerializer/ZeroSerializer/benchmark/ZeroSerializer.Benchmark.csproj::TargetFramework=net5.0]
 /home/runner/....

GitHub Actions: Test / 3_test (Debug).txt: Add explicit expected GetByteLength assertions to tests

Conclusion: failure

View job details

##[group]Run dotnet test -c Debug --no-restore --no-build \
 �[36;1mdotnet test -c Debug --no-restore --no-build \�[0m
 �[36;1m  > test-output.txt 2>&1�[0m
 �[36;1m�[0m
 �[36;1mgrep -E " - .*\.dll" test-output.txt >> $GITHUB_STEP_SUMMARY�[0m
 shell: /usr/bin/bash -e {0}
 env:
   DOTNET_ROOT: /usr/share/dotnet
 ##[endgroup]
 ##[error]Process completed with exit code 1.

GitHub Actions: Test / test (Debug): Add explicit expected GetByteLength assertions to tests

Conclusion: failure

View job details

##[group]Run dotnet test -c Debug --no-restore --no-build \
 �[36;1mdotnet test -c Debug --no-restore --no-build \�[0m
 �[36;1m  > test-output.txt 2>&1�[0m
 �[36;1m�[0m
 �[36;1mgrep -E " - .*\.dll" test-output.txt >> $GITHUB_STEP_SUMMARY�[0m
 shell: /usr/bin/bash -e {0}
 env:
   DOTNET_ROOT: /usr/share/dotnet
 ##[endgroup]
 ##[error]Process completed with exit code 1.

GitHub Actions: Test / test (Debug): Add explicit expected GetByteLength assertions to tests

Conclusion: failure

View job details

##[group]Run cat test-output.txt
 �[36;1mcat test-output.txt�[0m
 �[36;1mexit 1�[0m
 shell: /usr/bin/bash -e {0}
 env:
   DOTNET_ROOT: /usr/share/dotnet
 ##[endgroup]
 /home/runner/.nuget/packages/system.text.encodings.web/8.0.0/buildTransitive/netcoreapp2.0/System.Text.Encodings.Web.targets(4,5): warning : System.Text.Encodings.Web 8.0.0 doesn't support net5.0 and has not been tested with it. Consider upgrading your TargetFramework to net6.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [/home/runner/work/ZeroSerializer/ZeroSerializer/benchmark/ZeroSerializer.Benchmark.csproj::TargetFramework=net5.0]
 /home/runner/.nuget/packages/system.text.json/8.0.5/buildTransitive/netcoreapp2.0/System.Text.Json.targets(4,5): warning : System.Text.Json 8.0.5 doesn't support net5.0 and has not been tested with it. Consider upgrading your TargetFramework to net6.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [/home/runner/work/ZeroSerializer/ZeroSerializer/benchmark/ZeroSerializer.Benchmark.csproj::TargetFramework=net5.0]
 /home/runner/.nuget/packages/system.text.encoding.codepages/7.0.0/buildTransitive/netcoreapp2.0/System.Text.Encoding.CodePages.targets(4,5): warning : System.Text.Encoding.CodePages 7.0.0 doesn't support net5.0 and has not been tested with it. Consider upgrading your TargetFramework to net6.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk. [/home/runner/work/ZeroSerializer/ZeroSerializer/benchmark/ZeroSerializer.Benchmark.csproj::TargetFramework=net5.0]
 /home/runner/....
🧰 Additional context used
🪛 GitHub Actions: Test / test (Debug)
tests/SerializationTests.cs

[error] 1024-1024: Test failed: VariableStructWithArrayAtEndView.GetByteLength returned 28 bytes instead of the expected 24 bytes.


[error] 1042-1042: Test failed: VariableStructWithStringAtEndView.GetByteLength returned 26 bytes instead of the expected 22 bytes.


[error] 1060-1060: Test failed: VariableStructWithBlittableStructAtEndView.GetByteLength returned 28 bytes instead of the expected 24 bytes.


[error] 1078-1078: Test failed: VariableStructWithPrimitiveAtEndView.GetByteLength returned 26 bytes instead of the expected 22 bytes.


[error] 1325-1325: Test failed: SharedReferenceInstances.GetByteLength returned 72 bytes instead of the expected 48 bytes.

🔇 Additional comments (2)
tests/SerializationTests.cs (1)

1225-1225: LGTM!

Also applies to: 1241-1241, 1325-1325

tests-unity/UnityCompatibility.cs (1)

241-241: LGTM!

Also applies to: 259-259

Comment thread tests/SerializationTests.cs Outdated
@sator-imaging
sator-imaging merged commit 373a313 into main Aug 30, 2026
4 checks passed
@sator-imaging
sator-imaging deleted the codex/add-expected-byte-length-assertions branch August 30, 2026 09:44
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