Comprehensive unit tests for ASCII dependency tree printing

• Replaced single placeholder test with 14 comprehensive test cases for printDependencyTree
• Added createGraph helper factory for dependency graph construction
• Tests cover simple trees, circular dependencies, shared dependencies,
 external/builtin/boundary/missing annotations, and reference kind prefixes
• Validates unused dependency omission and tree character formatting

src/output/ascii/import.spec.ts

Comprehensive unit tests for JSON dependency tree serialization

• Expanded from single placeholder test to 12 comprehensive test cases for graphToSerializableTree
• Added createGraph helper factory for dependency graph setup
• Tests cover circular references, shared node deduplication, missing nodes, unused dependency
 omission, and boundary/builtin/missing kind serialization
• Validates external dependencies without nested nodes and proper metadata inclusion

src/output/json/import.spec.ts

Comprehensive unit tests for import/export binding collection

• Replaced single placeholder test with 20 focused test cases organized into 4 describe blocks
• Added createMockSymbol and collect helper functions using oxc-parser for real AST parsing
• Tests cover named/default/namespace imports, re-exports, export all, type-only filtering, and
 symbol mapping
• Validates renamed bindings, local exports, and default export handling

src/analyzers/react/bindings.spec.ts

Comprehensive unit tests for ASCII React usage tree printing

• Replaced single placeholder test with 14 comprehensive test cases for React usage tree printing
• Added createGraph helper factory for React usage graph construction
• Tests cover entry printing, empty graph handling, circular references, alias display, kind
 filtering, and builtin file path display
• Includes 5 test cases for diff tree printing with change markers and circular node handling

src/output/ascii/react.spec.ts

Comprehensive unit tests for ASCII package dependency tree printing

• Replaced single placeholder test with 13 comprehensive test cases for package dependency tree
 printing
• Tests cover simple trees, workspace dependencies with paths/specifiers, circular references, and
 missing root nodes
• Includes 5 test cases for diff tree printing with added/removed/changed dependencies and version
 changes
• Validates tree character formatting and circular workspace reference handling

src/output/ascii/deps.spec.ts

Comprehensive unit tests for color formatting utilities

• Expanded from single describe block with 3 tests to 7 focused describe blocks with 20+ test cases
• Added comprehensive tests for resolveColorSupport covering FORCE_COLOR, NO_COLOR, and TTY
 detection
• Tests validate color wrapping for unused markers, React symbol labels, and package diff changes
• Covers edge cases like multiple occurrences, color precedence, and disabled color mode

src/color.spec.ts

Comprehensive unit tests for React symbol collection

• Replaced single placeholder test with 18 comprehensive test cases organized into 2 describe blocks
• Added collectSymbols and collectDynamicCandidates helper functions using oxc-parser
• Tests cover function declarations, arrow functions, styled-components, dynamic component
 candidates, and export handling
• Validates filtering of non-React functions, lowercase names, and underscore-containing identifiers

src/analyzers/react/symbols.spec.ts

Comprehensive unit tests for JSON React tree serialization

• Replaced single placeholder test with 8 comprehensive test cases for React tree serialization
• Added createGraph helper factory for React usage graph construction
• Tests cover entry serialization, nested usage handling, circular reference detection, and kind
 filtering
• Validates missing node filtering and diff graph serialization

src/output/json/react.spec.ts

Comprehensive unit tests for React entry collection helpers

• Replaced placeholder tests with comprehensive test cases for createReactUsageLocation function
 covering edge cases (negative offsets, empty source text)
• Added extensive test suite for collectEntryUsages function using parseSync to parse real TSX
 code and validate AST traversal
• Tests cover component detection, hook calls, builtin element handling, nested components,
 deduplication, and various reference patterns (member expressions, React.createElement)

src/analyzers/react/entries.spec.ts

Comprehensive unit tests for React symbol usage analysis

• Replaced minimal placeholder test with 15+ comprehensive test cases for analyzeSymbolUsages
 function
• Added helper function createSymbolFromCode to parse TSX code and create test symbols with proper
 AST nodes
• Tests cover component references, hook detection, builtin element handling, styled-component
 patterns, React.createElement, and multiple references in single functions

src/analyzers/react/usage.spec.ts

Comprehensive unit tests for JSON dependency serialization

• Replaced placeholder test with comprehensive test suite for graphToSerializablePackageTree
 covering root packages, workspace dependencies, circular references, and missing nodes
• Added extensive tests for diffGraphToSerializablePackageTree validating serialization of
 dependency diff graphs with change tracking and version comparisons
• Tests use realistic PackageDependencyGraph and PackageDependencyDiffGraph structures to
 validate transformation logic

src/output/json/deps.spec.ts

Comprehensive unit tests for React file analysis

• Replaced minimal placeholder test with 16+ comprehensive test cases for analyzeReactFile
 function
• Added helper function analyze to parse TSX code and invoke the analyzer with configurable
 options
• Tests cover component/hook detection, import/export binding collection, entry usage collection,
 symbol reference analysis, source dependency mapping, and builtin element handling

src/analyzers/react/file.spec.ts