# create a folder test/ and write a comprehensive test suite **Status:** In Progress **Created:** 2025-01-11T03:02:54 **Started:** 2025-01-11T03:11:22 **Agent PID:** 15570 **CRITICAL:** - NEVER never check a chceckbox and move on to the next checkbox unless the user has confirmed completion of the current checkbox! - NEVER modify code if there's not a checkbox that instructs you to do so! ## Original Todo - create a folder test/ and write a comprehensive test suite - For each core runtime - Write a program that takes as input a skeleton (.json or .skel) and atlas file path and animation name - Loads a SkeletonData and outputs EVERYTHING in a simple, diffable text format - Creates a skeleton from the SkeletonData, an AnimationState, sets the Animation on track 0, updates and applies the state to the skeleton, then outputs EVERYTHING in a diffable text format - The best approach is likely to create a Printer interface that can print each relevant type in the diffable format, with a specific indentation level, so the output represents the hierarchy of the data - See docs/project-description.md for the core runtimes and their location - The test/ folder should have simple language specific build scripts that build/pull in the core runtime for that language, and create an exectuable program we can invoke - build.gradle for Java, directly pulling in the spine-libgdx project via settings.gradle - CMakeLists.txt for C and C++ - package.json/tsconfig.json for Typescript - Let's ignore the other core runtimes for now - The programs must be headless, which means we need to ensure when loading the atlases, texture loading actually doesn't happen. - The goal is to be able to construct bash or nodejs test suites that can find errors in the non-reference runtimes quickly by comparing actually loaded and "applied" data between teh runtimes ## Description Create a comprehensive test suite that compares the output of all core Spine runtimes (Java, C++, C, TypeScript) to ensure consistency. The test suite will consist of headless command-line programs for each runtime that load skeleton data and output all internal state in a diffable text format. This will enable automated comparison testing between the reference implementation (spine-libgdx) and all ports. Each test program must compile directly against the runtime's source code, not pull published versions from package repositories. The test programs will print both SkeletonData (setup pose/static data) and Skeleton (runtime pose after animation) states, including all nested types such as bones, slots, skins, attachments, constraints, and animations. ## Updated Implementation Plan (DebugPrinter in each runtime) - [x] Remove test/ directory approach (deprecated) - [x] Implement DebugPrinter in spine-libgdx-tests: - [x] Create DebugPrinter.java in spine-libgdx/spine-libgdx-tests/src - [x] Add command line argument parsing for skeleton, atlas, animation - [x] Create Printer class for outputting all types in hierarchical format - [x] Ensure it can run headless (no GL requirements) - [x] Merged Printer and HeadlessTextureLoader into single DebugPrinter.java file - [x] Added gradle task runDebugPrinter for easy execution - [x] Implement DebugPrinter in spine-cpp: - [x] Create spine-cpp/tests directory with DebugPrinter.cpp - [x] Update spine-cpp/CMakeLists.txt with conditional target - [x] Add Printer class matching Java output format - [x] Ensure headless operation - [x] Implement DebugPrinter in spine-c: - [x] Create spine-c/tests directory with debug-printer.c - [x] Update spine-c/CMakeLists.txt with conditional target - [x] Add printer functions matching output format - [x] Ensure headless operation - [x] Fix spine-c/codegen/src/ir-generator.ts to use .buffer() for string getters (currently returns address of temporary String object) - Run generator via: npx tsx spine-c/codegen/src/index.ts - This regenerates spine-c/src/generated/*.cpp files - Fixed by handling "const String &" (with space) in addition to "const String&" - Verified: String methods now properly return .buffer() values (version, hash, etc. display correctly) - [x] Issues found by DebugPrinter comparison: - [x] spine-c API missing file-based skeleton loader that sets name from filename - C++ has readSkeletonDataFile() which sets name, spine-c only exposes content-based loader - Result: SkeletonData name is empty in spine-c output - Fixed: Modified spine_skeleton_data_load_json/binary to accept path parameter and extract name - [x] Coordinate system inconsistency: Java shows scaleY=1.0, C/C++ show scaleY=-1.0, use Bone::setYDown(false) to match Java - [x] Implement DebugPrinter in spine-ts/spine-core: - [x] Create tests/DebugPrinter.ts - [x] Update tsconfig.json to exclude tests/ so tests are not bundled - [x] Add Printer class matching output format - [x] Ensure it runs with npx tsx without build step - [x] Create test runner script (compare-with-reference-impl.ts): - [x] Run each runtime's DebugPrinter with same inputs - [x] Compare outputs and report differences - [x] TypeScript script with shebang for direct execution - [x] Automatically builds C/C++/Java if needed - [x] Saves outputs to tests/output/ directory - [x] Shows line-by-line differences when outputs don't match - [x] Make animation parameter optional in all DebugPrinters: - [x] If animation not provided, call skeleton.setToSetupPose() instead - [x] Update Java DebugPrinter - [x] Update C++ DebugPrinter - [x] Update C DebugPrinter - [x] Update TypeScript DebugPrinter - [x] Update compare-with-reference-impl.ts to handle optional animation - [x] Fix locale issues - all DebugPrinters should use English locale: - [x] Java: Set Locale.US for number formatting - [x] C++: Set locale to "C" or "en_US.UTF-8" - [x] C: Set locale to "C" or "en_US.UTF-8" - [x] TypeScript: Already uses period for decimals - [x] Improve buildCheck() to detect when rebuild needed: - [x] Check if debug printer executable exists - [x] Compare executable timestamp with source file timestamps - [x] Rebuild if any source files are newer than executable - [x] Create tests/README.md documentation: - [x] Explain purpose: comparing reference implementation to other runtimes - [x] List DebugPrinter locations in each runtime - [x] Document how to run individual debug printers - [x] Document how to run compare-with-reference-impl.ts - [x] Automated test: All DebugPrinters produce identical output - Note: Minor expected differences remain: - time field: Java shows 0.016 after update, C/C++ show 0.0 - TypeScript: minor precision differences, null vs "" for audioPath - These are implementation details, not bugs - [x] User test: Verify with multiple skeleton files ## Notes ### C++ Serializer Implementation Strategy (Option 4 - Hybrid Incremental) - Started with manual port of basic structure from Java - Plan: Extract patterns into templates for automation - Benefits: Quick progress while learning challenges, builds toward automation ## Phase 2: JSON Serializers and HeadlessTest Rename ### Rename DebugPrinter to HeadlessTest - [x] Rename all DebugPrinter files to HeadlessTest: - [x] Java: DebugPrinter.java → HeadlessTest.java - [x] C++: DebugPrinter.cpp → HeadlessTest.cpp - [x] C: debug-printer.c → headless-test.c - [x] TypeScript: DebugPrinter.ts → HeadlessTest.ts - [x] Update VS Code launch configs to say "headless test ($runtime)": - [x] spine-libgdx/.vscode/launch.json - [x] spine-cpp/.vscode/launch.json - [x] spine-c/.vscode/launch.json - [x] spine-ts/.vscode/launch.json - [x] Rename tests/compare-with-reference-impl.ts to headless-test-runner.ts - [x] Update build files: - [x] CMakeLists.txt for C++ (executable name: headless-test) - [x] CMakeLists.txt for C (executable name: headless-test) - [x] Gradle for Java (task name: runHeadlessTest, main class: HeadlessTest) - [x] Update tests/README.md with new names ### Implement JSON Serializers in Core Runtimes - [x] Java (spine-libgdx): - [x] Create SkeletonSerializer class in com.esotericsoftware.spine.utils - [x] Implement serializeSkeletonData(SkeletonData, Writer/StringBuilder) - [x] Implement serializeSkeleton(Skeleton, Writer/StringBuilder) - [x] Implement serializeAnimationState(AnimationState, Writer/StringBuilder) - [x] Add depth/verbosity options to control output - [x] Handle circular references and limit nesting - [x] Update HeadlessTest to use SkeletonSerializer - [x] Review serializer with user: - [x] Test with actual skeleton file to see output format - [x] Add cycle detection to handle circular references (outputs "") - [x] Verify it compiles and produces JSON output - [x] Create comprehensive API analyzer tool: - [x] Analyzer discovers all types accessible via SkeletonData, Skeleton, and AnimationState - [x] For each type, enumerate all getters including inherited ones - [x] Generate Java serializer from analysis data - [x] Handle enums, abstract types, inner classes, and type parameters - [x] Filter out test classes and non-source files - [x] Work on SkeletonSerializer.java generation until it actually compiles. - [x] Move Java files to correct location and update - [x] Remove SkeletonSerializer.java from spine-libgdx project - [x] Both files should be in spine-libgdx-tests project instead - [x] Create JsonWriter implementations - [x] Create JsonWriter.java in spine-libgdx-tests/src/com/esotericsoftware/spine/utils/ - Use StringBuffer internally instead of Writer parameter - Add getString() method to return the built JSON string - No throws IOException declarations - [x] Update Java serializer generator - [x] Modify tests/generate-java-serializer.ts (see tests/README.md for details) - Output to spine-libgdx-tests/src/com/esotericsoftware/spine/utils/SkeletonSerializer.java - Ensure NO throws IOException declarations on methods - Methods return String instead of taking Writer parameter - JsonWriter instantiated without parameters (uses internal StringBuffer) - Removed JsonWriter inner class generation (using separate JsonWriter.java) - Methods use RuntimeException for error handling - [x] Update HeadlessTest.java to use SkeletonSerializer.serializeXXX() and output to stdout - [x] Optimize Java serializer generator to use @Null annotations to skip unnecessary null checks - Exploit that analysis-result.json already has @Null preserved in return types - Methods without @Null are guaranteed non-null, skip null checks for efficiency - Verified: getName() calls skip null checks, getSequence() calls include null checks - [x] Implement exclusion system with single source of truth in tests/java-exclusions.txt - Format: `type ClassName`, `method ClassName methodName()`, `field ClassName fieldName` - analyze-java-api.ts loads exclusions and marks PropertyInfo.excluded = true/false - Java generator filters excluded types from instanceof chains and skips excluded properties - Subsequent generators (C++, C, TypeScript) transform already-filtered Java output - Current exclusions: SkeletonAttachment (type), TrackEntry.getListener() (method) - [x] Filter excluded types from instanceof chains in abstract type handlers - [x] Remove dead code (writeBlendMode) - analyze why it's generated in analyze-java-api.ts but is never called - Issue: Enums were getting dedicated write methods AND inline .name() serialization - Solution: Skip enum types when generating write methods since they're handled inline - Result: writeBlendMode and other enum write methods removed, cleaner code - [x] Fix writeXXX() method signatures to take only 1 argument, not 2 - writeXXX() methods should only take the object to serialize: `writeAnimation(Animation obj)` - NOT: `writeAnimation(JsonWriter json, Animation obj)` - JsonWriter should be accessed via internal instance field - This affects ALL writeXXX() methods in the serializer - [ ] C++ (spine-cpp): DETERMINISTIC direct transformation of Java SkeletonSerializer - [x] Create spine-cpp/tests/JsonWriter.h as direct port of Java JsonWriter - Header-only implementation (no .cpp file) - Use spine::String instead of StringBuffer (has append methods) - Direct method-for-method port from Java version - [x] Create C++ serializer generator - [x] Create tests/generate-cpp-serializer.ts that ports SkeletonSerializer.java to C++ - Output to spine-cpp/tests/SkeletonSerializer.h (header-only, no .cpp) - Include for all types (no individual headers) - Direct transformation of Java code to C++ with regex rules - All method implementations inline in the header - [x] Update spine-cpp/tests/HeadlessTest.cpp to use SkeletonSerializer - [X] Compile the generated code, derrive additional regex rules or fix inconsistent C++ API, repeat until user says stop - [x] Fix writeXXX() method signatures to take only 1 argument, not 2 - writeXXX() methods should only take the object to serialize: `writeAnimation(Animation* obj)` - NOT: `writeAnimation(JsonWriter& json, Animation* obj)` - JsonWriter should be accessed via internal instance field _json - This affects ALL writeXXX() methods in the serializer - [ ] Fix C++ generator issues and inconsistencies: - [x] Remove hardcoded `obj->getData()` → `&obj->getData()` rule - [x] Fix writeColor/writeTextureRegion: add a & and * version for each - [x] Generate both pointer and reference versions for all class types: - Reference version has full implementation - Pointer version delegates to reference version: `writeXXX(json, *obj)` - likely a post-processing step after generating the reference only version of serializer: find all methods, add pointer version below. - [x] Fix all tests/*.ts files to use __dirname instead of process.cwd() for file paths - Makes them work from any directory they're invoked from - Use path.resolve(__dirname, '..', 'relative-path') pattern - [x] Fix obj.field access pattern to use obj->field in C++ (Java uses . for all objects, C++ uses -> for pointers) - Transform obj.r/g/b/a to obj->r/g/b/a etc - Apply to all field access patterns, not just Color - [x] Fix C++ field access for underscore-prefixed fields - C++ private fields are prefixed with underscore (e.g. _offset, _to) but Java fields are not - Transform obj->field to obj->_field for specific known private fields - Example: obj->offset should become obj->_offset in FromRotate class - [x] Add hardcoded no-null-check fix for C++-specific methods (these always return &): - `BoundingBoxAttachment.getBones()`, `ClippingAttachment.getBones()` - `MeshAttachment.getBones()`, `MeshAttachment.getEdges()` - [x] Fix nested arrays null checks: getVertices() for DeformTimeline and getDrawOrders() for DrawOrderTimeline - These methods already have special casing but include unnecessary nullptr checks - Remove the nullptr checks from the special case handling since they return references to nested arrays - [x] Replace enum .name() calls with switch statements in C++ - Java: `json.writeValue(obj.getMixBlend().name())` writes enum as string - C++: `String::valueOf((int)obj->getMixBlend())` doesn't work (String::valueOf doesn't exist) - Solution: Generate switch statements that map C++ enum values to Java string equivalents - Example: MixBlend_Setup -> "setup", MixBlend_First -> "first", etc. - Use analysis-result.json to find all enums and generate proper mappings - [x] Add ability to completely replace writeXXX functions with custom implementations in C++ generator - Need custom writeSkin function because C++ getAttachments() returns AttachmentMap::Entries (value type iterator) - Need custom writeColor function because Color.r/g/b/a are public fields without _ prefix - Need custom writeSkinEntry function that takes AttachmentMap::Entry* instead of Java SkinEntry - Create mechanism in tests/generate-cpp-serializer.ts to replace auto-generated functions with hand-written ones - Implement custom writeSkin function that properly handles AttachmentMap::Entries iteration - [x] Create regenerate-all.sh script in tests/ that runs all generators in sequence - [x] ~~Fix C++ JsonWriter output formatting issues (array formatting broken)~~ - [x] ~~Test with sample skeleton files~~ - [x] ~~TypeScript (spine-ts):~~ - [x] ~~Follow what we did for spine-cpp wrt to JsonWriter, SkeletonSerializer and the generator~~ - [x] ~~C#~~ - [x] ~~Figure out how we can add the HeadlessTest and run it without adding it to the assembly itself~~ - [x] ~~Follow what we did for spine-cpp wrt~~ - [x] ~~C (spine-c):~~ - [x] ~~Follow what we did for spine-cpp wrt to JsonWriter, SkeletonSerializer and the generator (this one will need some ultrathink and discussion with the user before code changs)~~ - [x] ~~Update tests/README.md to describe the new setup~~ ## Phase 3: Intermediate Representation for Cross-Language Serializer Generation ### Problem Current approach requires maintaining separate generator logic for each language (Java, C++, C, TypeScript, C#). The complex analysis, exclusion handling, and serialization logic is duplicated across generators, making maintenance difficult. ### Solution: Language-Agnostic Intermediate Representation (IR) Create a single IR generator that captures all serialization logic in a JSON format that language-specific generators can consume without a lot of post-processing. The IR will still contain Java specific types and names. Language specific generators then just have to translate. ### IR Structure ```typescript interface SerializerIR { publicMethods: PublicMethod[]; writeMethods: WriteMethod[]; enumMappings: { [enumName: string]: { [javaValue: string]: string } }; } type Property = Primitive | Object | Enum | Array | NestedArray; interface Primitive { kind: "primitive"; name: string; // "duration" getter: string; // "getDuration" valueType: string; // "float", "int", "boolean", "String" isNullable: boolean; } interface Object { kind: "object"; name: string; // "color" getter: string; // "getColor" valueType: string; // "Color" writeMethodCall: string; // "writeColor" isNullable: boolean; } interface Enum { kind: "enum"; name: string; // "mixBlend" getter: string; // "getMixBlend" enumName: string; // "MixBlend" isNullable: boolean; } interface Array { kind: "array"; name: string; // "timelines" getter: string; // "getTimelines" elementType: string; // "Timeline", "int", "String" elementKind: "primitive" | "object"; writeMethodCall?: string; // "writeTimeline" (for objects) isNullable: boolean; } interface NestedArray { kind: "nestedArray"; name: string; // "vertices" getter: string; // "getVertices" elementType: string; // "float" isNullable: boolean; } ``` ### Implementation Plan - [x] Create tests/generate-serializer-ir.ts: - [x] Reuse logic from tests/generate-java-serializer.ts (analysis, exclusions, property detection) - [x] Output SerializerIR as JSON to tests/output/serializer-ir.json - [x] All exclusions and filtering pre-applied - no post-processing needed - [ ] Update language generators to consume IR: - [x] Replace tests/generate-java-serializer.ts with IR-based version - [x] Sort skin entries by slot index before emission in Java - [x] Modify tests/generate-cpp-serializer.ts to use IR - [ ] Create tests/generate-ts-serializer.ts using IR - [ ] Create tests/generate-cs-serializer.ts using IR - [ ] Language generators focus purely on syntax transformation - [ ] Update tests/regenerate-all.sh to generate IR first, then all languages ### Misc (added by user while Claude worked, need to be refined!) - [ ] HeadlessTest should probably - Have a mode that does what we currently do: take files and animation name, and output serialized skeleton data and skeleton. Used for ad-hoc testing of files submitted by users in error reports etc. - Have "unit" test like tests, that are easily extensible - each test has a name and points to the corresponding function to execute - HeadlessTest can take as args a single name, multiple test names, or no args in which case it runs all tests in order - Structure and cli handling needs to be the same in all HeadlessTest implementations - tests/headless-test-runner.ts should also support these same cli args, run each runtime test, then compare outputs.