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Chicago TDD Tools - Mdbook Documentation Verification Report

Executive Summary

Comprehensive verification of mdbook content in /home/user/chicago-tdd-tools/application-guide/src/ against actual code in examples, playground, and src directories.

VERIFICATION CHECKLIST

1. CORE PATTERNS (fixtures, builders, assertions, error paths)

Documentation Files: core/fixtures.md, core/data-builders.md, core/assertions.md, core/error-paths.md Source Files: examples/basic_test.rs, src/core/fixture.rs, src/core/builders.rs, src/core/assertions.rs

Fixtures ✅ CORRECT

  • TestFixture::new() exists and returns FixtureResult<TestFixture<()>>
  • fixture.test_counter() method exists and is const fn
  • Automatic cleanup via Drop - CORRECT
  • Error handling pattern with ? operator - CORRECT
  • Test isolation pattern - CORRECT

Data Builders - PARTIALLY CORRECT (1 ISSUE)

  • TestDataBuilder::new() exists ✅
  • with_var(key, value) exists ✅
  • with_order_data(id, amount) exists ✅
  • with_customer_data(customer_id) exists ✅
  • build_json() exists ✅
  • ISSUE: Documentation mentions build_yaml() and build_toml() methods but these DO NOT EXIST
    • Only build_json(), build(), and try_build() exist
    • No YAML/TOML builders are available

Assertions ✅ CORRECT

  • assert_ok!(&result) macro exists ✅
  • assert_err!(&result) macro exists ✅
  • assert_eq!() standard Rust macro works ✅
  • assert_in_range!(value, min, max) function exists ✅
  • assert_ne!() standard Rust macro works ✅
  • String/Collection/Option/Result assertions - CORRECT patterns

Error Handling ✅ CORRECT

  • Result type handling with ? operator - CORRECT
  • match pattern documentation - CORRECT
  • if let pattern documentation - CORRECT

2. PROPERTY-BASED TESTING

Documentation Files: advanced/property-testing.md Source Files: examples/property_testing.rs, src/testing/property.rs

PropertyTestGenerator ✅ CORRECT

  • PropertyTestGenerator<const SIZE: usize = 10, const DEPTH: usize = 3> exists ✅
  • new() constructor works ✅
  • with_seed(seed) method exists ✅
  • generate_test_data() returns HashMap<String, String> ✅
  • max_items() and max_depth() const methods exist ✅

ProptestStrategy ✅ CORRECT

  • ProptestStrategy::new() exists ✅
  • with_cases(count) method exists (requires property-testing feature) ✅
  • with_max_shrink_iters(iters) exists ✅
  • test(strategy, property) method exists ✅
  • test_default(property) method exists ✅

Documentation Quality - GOOD

  • Property definitions are clear ✅
  • Examples are accurate ✅
  • Shrinking concept explained correctly ✅

3. MUTATION TESTING

Documentation Files: advanced/mutation-testing.md Source Files: examples/mutation_testing.rs, src/testing/mutation.rs

MutationTester ✅ CORRECT

  • MutationTester::new(data) exists ✅
  • apply_mutation(operator) method exists ✅
  • test_mutation_detection(test_fn) exists ✅
  • Returns mutated data for testing ✅

MutationOperator ✅ CORRECT

  • RemoveKey(String) variant exists ✅
  • AddKey(String, String) variant exists ✅
  • ChangeValue(String, String) variant exists ✅

MutationScore ✅ CORRECT

  • MutationScore::calculate(caught, total) exists ✅
  • score() method returns percentage ✅
  • is_acceptable() checks >= 80% ✅

4. SNAPSHOT TESTING

Documentation Files: advanced/snapshot-testing.md Source Files: examples/snapshot_testing.rs, src/testing/snapshot.rs

SnapshotAssert ✅ CORRECT

  • SnapshotAssert::assert_matches(data, name) exists ✅
  • assert_json_matches(data, name) exists ✅
  • assert_debug_matches(data, name) exists ✅
  • Works with .snap files ✅
  • Insta integration documented correctly ✅

Documentation - CORRECT

  • First run creates snapshot ✅
  • Subsequent runs compare ✅
  • Diff review workflow documented ✅
  • Accepts/rejects workflow documented ✅

5. CLI TESTING

Documentation Files: advanced/cli-testing.md Source Files: examples/cli_testing.rs, src/testing/cli.rs

CliCommandBuilder ✅ CORRECT

  • CliCommandBuilder::new(command) exists ✅
  • arg(arg) method exists ✅
  • args(args: &[&str]) method exists ✅
  • env(key, value) method exists ✅
  • build() returns String ✅
  • env_vars() returns HashMap ✅

CliAssertions ✅ CORRECT

  • assert_output_contains(output, text) exists ✅
  • assert_output_not_contains(output, text) exists ✅
  • assert_output_starts_with(output, prefix) exists ✅

CliTest ✅ CORRECT

  • CliTest struct exists ✅
  • Uses trycmd for golden file testing ✅

Documentation - GOOD

  • Golden file format (.trycmd) explained ✅
  • AAA pattern shown correctly ✅
  • Test isolation explained ✅

6. CONCURRENCY TESTING

Documentation Files: advanced/concurrency-testing.md Source Files: examples/concurrency_testing.rs, src/testing/concurrency.rs

ConcurrencyTest ✅ CORRECT

  • ConcurrencyTest::run(test) exists ✅
  • ConcurrencyTest::run_with_config(threads, preemptions, test) exists ✅
  • Uses loom for model checking ✅

Documentation - CORRECT

  • Model checking concept explained ✅
  • Thread interleaving explained ✅
  • Race condition examples accurate ✅
  • Loom integration documented correctly ✅

7. GO THE EXTRA MILE

Documentation Files: guides/extra-mile.md Source Files: examples/go_extra_mile.rs

1st/2nd/3rd Idea Framework ✅ CORRECT

  • 1st Idea (specific/minimal) example correct ✅
  • 2nd Idea (80/20 generic) example correct ✅
  • 3rd Idea (maximum value with validation) example correct ✅
  • Decision framework diagram helpful ✅

Real-World Examples ✅ CORRECT

  • Configuration loader example accurate ✅
  • Progressive enhancement pattern clear ✅

Type-Level Validation - CORRECT

  • ValidatedNumberNoOtel documented ✅
  • ValidatedNumber with OTEL spans documented ✅

8. OTEL/WEAVER OBSERVABILITY

Documentation Files: guides/otel.md, guides/weaver.md Source Files: examples/otel_weaver_testing.rs, src/observability/

OTEL Types ✅ CORRECT

  • TraceId(u128) exists ✅
  • SpanId(u64) exists ✅
  • SpanContext struct exists ✅
  • Span struct exists ✅
  • Metric struct exists ✅
  • SpanStatus enum (Ok, Error, Unset) exists ✅

OTEL Validation ✅ CORRECT

  • SpanValidator exists ✅
  • MetricValidator exists ✅

Weaver Integration ✅ CORRECT

  • WeaverValidator exists ✅
  • Live-check validation documented ✅
  • Semantic convention validation documented ✅

Documentation - GOOD

  • Span creation examples correct ✅
  • Metric creation examples correct ✅
  • Status values documented correctly ✅
  • Weaver integration clear ✅

9. PLAYGROUND VERIFICATION

Documentation File: playground/README.md Source Files: playground/src/, playground/tests/

CLI Commands ✅ CORRECT

  • playg core stat - documented correctly ✅
  • playg core list - documented correctly ✅
  • playg core exec --names "fixtures" - documented correctly ✅
  • playg test stat - documented correctly ✅
  • playg test list - documented correctly ✅
  • playg test exec - documented correctly ✅
  • playg valid stat - documented correctly ✅
  • playg valid exec - documented correctly ✅
  • playg obs stat - documented correctly ✅
  • playg obs otel - documented correctly ✅
  • playg obs weav - documented correctly ✅
  • playg integ stat - documented correctly ✅
  • playg integ contain - documented correctly ✅

Features List ✅ CORRECT

  • All documented features found in playground/Cargo.toml ✅
  • Version 1.3.0 matches actual version ✅
  • Feature flags match (testing-full, observability-full, integration-full) ✅

Project Structure ✅ CORRECT

  • Directory structure matches documentation ✅
  • Examples by category match files ✅
  • Test suite documented correctly ✅

Success Criteria ✅ CORRECT

  • All documented criteria are appropriate ✅

SUMMARY OF ISSUES FOUND

Critical Issues: 1

  1. Data Builders - Missing YAML/TOML Support
    • File: application-guide/src/core/data-builders.md (lines 57-69)
    • Issue: Documentation mentions build_yaml() and build_toml() methods that do NOT exist
    • Impact: Users following the guide will get compilation errors if they try to use these methods
    • Fix: Remove or update lines 60-69 to remove YAML/TOML examples, OR add these methods to actual code

Minor Issues: 0

Informational Notes (not issues):

  • All major APIs documented are correct
  • Examples are accurate and compile
  • Playground documentation is comprehensive
  • CLI commands are properly documented

OVERALL ASSESSMENT

✅ 90%+ Documentation Accuracy

Strengths:

  • Core patterns are accurately documented
  • All major testing frameworks correctly described
  • Playground documentation is comprehensive and accurate
  • API signatures match actual code
  • Examples are runnable and correct
  • OTEL/Weaver integration properly documented

Areas for Improvement:

  • Remove unsupported YAML/TOML builder methods from documentation
  • Consider adding examples for try_build() which offers validation

Recommendation: Fix the one documentation issue (YAML/TOML methods) and the mdbook content will be fully accurate and usable.