// Test environment system (DomeGradient, IBLGradient, default lighting, component schemas) against the poke example using the iwsdk CLI.
MUST read this skill BEFORE developing VR/MR/browser-first 3D applications using IWSDK (Immersive Web SDK). Covers project scaffolding, headless browser setup, CLI tools, reference system, ECS debugging, XR emulation, verification workflows, deployment, and known issues.
Test audio system (AudioSource loading, playback state, stop, spatial audio) against the audio example using the iwsdk CLI.
Test ECS core functionality (system registration, components, Transform sync, pause/step/resume, system toggle, entity discovery, snapshots) against the poke example using the iwsdk CLI.
Test grab system (distance grab, one-hand grab, two-hand grab) against the grab example using the iwsdk CLI.
Test XR interactions (ray, poke/touch, dual-mode, audio, UI panel) against the poke example using the iwsdk CLI.
Test level system (LevelRoot, LevelTag, default lighting, scene hierarchy) against the poke example using the iwsdk CLI.
| name | test-environment |
| description | Test environment system (DomeGradient, IBLGradient, default lighting, component schemas) against the poke example using the iwsdk CLI. |
| argument-hint | [--suite gradient|ibl|defaults|all] |
Run 6 test suites covering default lighting verification, system registration, component registration, scene hierarchy, ECS data modification, and stability.
Configuration:
$IWSDK_REPO_ROOT/examples/pokeTool calls: every tool call is npx iwsdk <subcommand> [--input-json '<JSON>'] [--timeout <ms>], run from inside the example workspace (cwd $EXAMPLE_DIR). The CLI auto-discovers the IWSDK app root from cwd, so no path tricks are required. Run npx iwsdk mcp inspect from the example to discover available tools and their CLI subcommands.
<JSON> is a JSON object string. Omit --input-json if no arguments are needed.{ok, workspaceRoot, operation, result}. Parse it to check assertions.--timeout 20000 for operations that may take longer (reload, xr enter, screenshot).IMPORTANT: Run each Bash command one at a time. Parse the JSON output and verify assertions before moving to the next command. Do NOT chain multiple CLI commands together.
IMPORTANT: When the instructions say "wait N seconds", use sleep N as a separate Bash command.
IMPORTANT: Boolean values in ecs set-component must be actual JSON booleans (value: true), NOT strings (value: "true"). Strings silently fail to coerce.
cd $IWSDK_REPO_ROOT/examples/poke && npm run fresh:install
Wait for this to complete before proceeding.
Start the dev server as a background task using the Bash tool's run_in_background: true parameter:
cd $IWSDK_REPO_ROOT/examples/poke && npm run dev
IMPORTANT: This command MUST be run with run_in_background: true on the Bash tool — do NOT append & to the command itself.
Once the background task is launched, poll the output for Vite's ready message (up to 60s). You can also run npx iwsdk dev status from the example directory until state.running becomes true. You do not need to extract or manage the port yourself; subsequent commands resolve the active runtime through the CLI automatically.
If the server fails to start within 60 seconds, report FAIL for all suites and skip to Step 5.
npx iwsdk ecs systems 2>/dev/null
This must return JSON with a list of systems. If it fails:
Run these commands in order:
npx iwsdk browser reload --timeout 20000 2>/dev/null
Then: sleep 3
npx iwsdk xr enter --timeout 20000 2>/dev/null
Then: sleep 2
npx iwsdk browser logs --input-json '{"count":20,"level":["error","warn"]}' 2>/dev/null
Assert: No error-level logs.
Test 1.1: Find LevelRoot Dynamically
npx iwsdk ecs find --input-json '{"withComponents":["LevelRoot"]}' 2>/dev/null
Assert: Exactly 1 entity. Save its entityIndex as <root>.
Test 1.2: LevelRoot Has Environment Components
npx iwsdk ecs query --input-json '{"entityIndex":<root>,"components":["DomeGradient","IBLGradient"]}' 2>/dev/null
Assert: Both components present with default values:
DomeGradient defaults:
| Field | Expected Value |
|---|---|
sky | [0.2423, 0.6172, 0.8308, 1.0] (soft blue) |
equator | [0.6584, 0.7084, 0.7913, 1.0] (gray-blue) |
ground | [0.807, 0.7758, 0.7454, 1.0] (warm beige) |
intensity | 1.0 |
_needsUpdate | false (already processed) |
IBLGradient defaults:
| Field | Expected Value |
|---|---|
sky | [0.6902, 0.749, 0.7843, 1.0] (soft blue-gray — different from DomeGradient!) |
equator | [0.6584, 0.7084, 0.7913, 1.0] (same as DomeGradient) |
ground | [0.807, 0.7758, 0.7454, 1.0] (same as DomeGradient) |
intensity | 1.0 |
_needsUpdate | false |
Key detail: DomeGradient and IBLGradient have different sky defaults.
Test 2.1: EnvironmentSystem Present
npx iwsdk ecs systems 2>/dev/null
Assert:
domeGradients: 1, iblGradients: 1, domeTextures: 0, iblTextures: 0Test 3.1: All Environment Components Registered
npx iwsdk ecs components 2>/dev/null
Assert these components exist with correct schemas:
| Component | Key Fields |
|---|---|
DomeGradient | sky (Color), equator (Color), ground (Color), intensity (Float32), _needsUpdate (Boolean) |
DomeTexture | src (String), blurriness (Float32), intensity (Float32), rotation (Vec3), _needsUpdate (Boolean) |
IBLGradient | sky (Color), equator (Color), ground (Color), intensity (Float32), _needsUpdate (Boolean) |
IBLTexture | src (String, default: "room"), intensity (Float32), rotation (Vec3), _needsUpdate (Boolean) |
Test 4.1: Dome Mesh in Scene
npx iwsdk scene hierarchy --input-json '{"maxDepth":2}' 2>/dev/null
The gradient dome mesh is added directly to the scene (not under LevelRoot). Look for an unnamed mesh node at the scene root level.
Test 5.1: Modify DomeGradient Sky Color
npx iwsdk ecs set-component --input-json '{"entityIndex":<root>,"componentId":"DomeGradient","field":"sky","value":"[1.0, 0.0, 0.0, 1.0]"}' 2>/dev/null
Then verify:
npx iwsdk ecs query --input-json '{"entityIndex":<root>,"components":["DomeGradient"]}' 2>/dev/null
Assert: sky = [1.0, 0.0, 0.0, 1.0]
Test 5.2: Modify IBLGradient Intensity
npx iwsdk ecs set-component --input-json '{"entityIndex":<root>,"componentId":"IBLGradient","field":"intensity","value":"2.0"}' 2>/dev/null
npx iwsdk ecs set-component --input-json '{"entityIndex":<root>,"componentId":"IBLGradient","field":"_needsUpdate","value":true}' 2>/dev/null
Assert: ECS value updates.
npx iwsdk browser logs --input-json '{"count":30,"level":["error","warn"]}' 2>/dev/null
Assert: No application-level errors or warnings. Pre-existing 404 resource errors from page load are acceptable.
Kill the dev server:
cd $IWSDK_REPO_ROOT/examples/poke && npx iwsdk dev down
Output a summary table:
| Suite | Result |
|--------------------------|-----------|
| 1. Default Lighting | PASS/FAIL |
| 2. System Registration | PASS/FAIL |
| 3. Component Registration| PASS/FAIL |
| 4. Scene Hierarchy | PASS/FAIL |
| 5. ECS Data Modification | PASS/FAIL |
| 6. Stability | PASS/FAIL |
If any suite fails, include which assertion failed and actual vs expected values.
If at any point a transient error occurs (server crash, WebSocket timeout, connection refused, etc.) that is NOT caused by a source code bug:
cd $IWSDK_REPO_ROOT/examples/poke && npx iwsdk dev downOnly give up after one retry attempt per suite. If the same suite fails twice, mark it FAIL and continue to the next suite.
Setting DomeGradient/IBLGradient color fields via npx iwsdk ecs set-component updates the ECS data but does NOT update the Three.js shader uniforms. Testing is limited to data verification.
The _needsUpdate flag is consumed by the EnvironmentSystem and reset to false. The response may already show newValue: false.
LevelSystem attaches DomeGradient + IBLGradient to the LevelRoot ONLY if defaultLighting: true (default) AND the level root doesn't already have dome/IBL components.
Never cache entity indices across page reloads. Always re-discover via npx iwsdk ecs find.
When setting boolean fields (like _needsUpdate) via npx iwsdk ecs set-component, the value must be a JSON boolean (true), not a string ("true"). Strings silently fail.