test: add Evaluation integration tests

[ooples]

Summary

• Adds 51 comprehensive integration tests for the Evaluation module
• Tests cover PredictionType enum, DefaultModelEvaluator, PredictionStatsOptions, and PredictionTypeInference
• Validates prediction type inference logic for various input types

Test Coverage

• PredictionType enum: All 4 values (BinaryClassification, Regression, MultiClass, MultiLabel)
• DefaultModelEvaluator: Default construction, custom options, null options handling
• PredictionStatsOptions: Default values, ConfidenceLevel, LearningCurveSteps
• PredictionTypeInference (via reflection):
  • Binary classification: 0/1 labels, all zeros, all ones, near-integer values
  • Multi-class: integer labels with contiguous range and low unique ratio
  • Regression: continuous values, NaN, infinity, high unique ratio
  • Multi-label: matrix with multiple positives per row
  • Matrix inputs: single column, multi-column, one-hot encoding
  • Tensor inputs: rank 1, rank 2, empty/null handling

Bug Fix

• Removes stale AiDotNet.Native.CLBlast.csproj project reference from test project

Linked Issue

Closes #655

Test plan

• All 51 tests pass on net10.0
• All 51 tests pass on net471
• Build succeeds with no warnings

🤖 Generated with Claude Code

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Project	Deployment	Review	Updated (UTC)
aidotnet-playground-api	Ready	Preview, Comment	Jan 23, 2026 10:04pm

[coderabbitai]

Summary by CodeRabbit

Release Notes

• Tests

  • Added comprehensive integration tests for the Evaluation module that validate prediction type inference across various data shapes and configurations, verify model evaluator construction with multiple options, and confirm prediction statistics functionality.

• Chores

  • Simplified test project build dependencies.

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Walkthrough

This PR removes a CLBlast project reference from the test project configuration and adds comprehensive integration tests for the Evaluation module, covering PredictionType enum validation, DefaultModelEvaluator constructors, PredictionStatsOptions properties, and PredictionTypeInference logic across various data shapes.

Changes

Cohort / File(s)	Summary
Project Reference Cleanup tests/AiDotNet.Tests/AiDotNetTests.csproj	Removed ProjectReference to AiDotNet.Native.CLBlast.csproj
Evaluation Integration Tests tests/AiDotNet.Tests/IntegrationTests/Evaluation/EvaluationIntegrationTests.cs	Added new test suite validating PredictionType enum, DefaultModelEvaluator constructors/options, PredictionStatsOptions properties, and PredictionTypeInference behavior via reflection across multiple data configurations (Vector, Matrix, Tensor) and target types

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• test: add comprehensive FineTuning module integration tests #753: Modifies the same AiDotNetTests.csproj file with identical removal of AiDotNet.Native.CLBlast.csproj ProjectReference

Suggested labels

feature

Poem

🐰 A cottontail's delight, with test cases so bright,
The Evaluation module now shines in the light!
From PredictionType checks to inference so wise,
We hop through the data with quantitative eyes,
With 651 lines of assurance on test,
This integration suite puts our code to the best!

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 2.56% which is insufficient. The required threshold is 80.00%.	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 summarizes the primary change: adding integration tests for the Evaluation module.
Description check	✅ Passed	The description is directly related to the changeset, providing detailed test coverage information and explaining the bug fix included.
Linked Issues check	✅ Passed	The PR adds 51 integration tests covering PredictionType, DefaultModelEvaluator, PredictionStatsOptions, and PredictionTypeInference, addressing the core requirement to test the Evaluation module [#655].
Out of Scope Changes check	✅ Passed	All changes are within scope: integration tests for the Evaluation module and removal of a stale project reference from the test project.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch test/evaluation-integration-tests

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[sonarqubecloud]

Quality Gate passed

Issues
10 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud