# Ruchy Notebook - EXTREME Quality Gates (wasm-labs inspired)
## 🎯 Vision: Jupyter-Level UX with Rust-Level Quality
**Goal**: Create a notebook experience that **empirically proves** all 41 language features work interactively.
---
## 🚦 3-Level Quality System (wasm-labs pattern)
### Level 1: quality-fast (<30s) - Pre-Commit
**Run**: `make notebook-quality-fast`
```makefile
notebook-quality-fast:
@cargo fmt -- --check
@cargo clippy -- -D warnings
@cargo test --test notebook_core
@echo "✅ Fast quality gate passed"
```
**Gates**:
- ✅ Format check
- ✅ Clippy warnings = errors
- ✅ Core notebook tests (20-30 tests)
- ❌ NO coverage (too slow)
- ❌ NO mutation (too slow)
---
### Level 2: quality-complete (~5min) - Pre-Push
**Run**: `make notebook-quality-complete`
```makefile
notebook-quality-complete: notebook-quality-fast
@cargo test --features notebook --all
@cargo llvm-cov --features notebook --fail-under-lines 85
@cargo llvm-cov --features notebook --branch --fail-under-branches 90
@echo "✅ Complete quality gate passed"
```
**Gates**:
- ✅ All fast checks
- ✅ All notebook tests
- ✅ Line coverage ≥85%
- ✅ Branch coverage ≥90%
- ❌ NO mutation (takes 10+ min)
---
### Level 3: quality-extreme (~10-15min) - Pre-Deploy
**Run**: `make notebook-quality-extreme`
```makefile
notebook-quality-extreme: notebook-quality-complete
@cargo mutants --features notebook --file src/notebook/*.rs
@# Verify mutation score ≥90%
@echo "✅ Extreme quality gate passed"
```
**Gates**:
- ✅ All complete checks
- ✅ Mutation testing ≥90% score
- ✅ E2E tests with real browser
- ✅ WASM size check (<500KB)
- ✅ Zero WASI imports
---
## 📊 Coverage Requirements (wasm-labs standards)
```yaml
coverage:
line_coverage:
minimum: 85%
target: 90%
enforcement: "BLOCKING - CI fails below threshold"
branch_coverage:
minimum: 90%
target: 95%
enforcement: "BLOCKING - CI fails below threshold"
note: "Branch coverage proves decision paths tested"
mutation_coverage:
minimum: 90%
target: 95%
enforcement: "BLOCKING - Pre-deploy only"
note: "Mutation testing proves tests catch real bugs"
```
**Why Branch Coverage ≥90%?**
- Line coverage measures execution
- Branch coverage measures decisions
- Mutation coverage measures effectiveness
**Example**:
```rust
// This has 100% line coverage but only 50% branch coverage
if x > 0 { /* tested */ } else { /* NOT tested */ }
```
---
## 🧬 Mutation Testing Requirements
**Target**: ≥90% mutation score (wasm-labs standard)
**Fast Mutation Testing** (for development):
```bash
# Only test recent changes
cargo mutants --features notebook --in-diff HEAD~1
# Runtime: ~2-3 minutes
```
**Full Mutation Testing** (for CI/deploy):
```bash
# Test all notebook code
cargo mutants --features notebook --file src/notebook/*.rs
# Runtime: ~10-15 minutes
```
**Mutation Score Calculation**:
```
mutation_score = caught_mutants / (caught_mutants + missed_mutants)
Target: ≥90%
```
---
## 🎭 E2E Testing with Playwright (wasm-labs pattern)
### Test Structure
```
tests/
├── e2e/
│ ├── notebook-basic.spec.ts # Basic notebook operations
│ ├── notebook-features.spec.ts # All 41 language features
│ ├── notebook-error.spec.ts # Error handling
│ └── notebook-wasm.spec.ts # WASM-specific tests
```
### Test Scenarios (Minimum)
```typescript
test('Notebook loads and runs code', async ({ page }) => {
await page.goto('http://localhost:8000/notebook.html');
await page.fill('textarea', '1 + 1');
await page.click('button.run');
await expect(page.locator('.output')).toContainText('2');
});
test('All 41 language features work', async ({ page }) => {
// Load feature test suite
const features = await loadFeatureTests();
for (const feature of features) {
await testFeature(page, feature);
}
// All 41 must pass
expect(passedFeatures).toBe(41);
});
```
### Browser Matrix
```yaml
browsers:
- Chrome (latest)
- Firefox (latest)
- Safari (latest - MacOS only)
matrix_tests: 41 features × 3 browsers = 123 test runs
runtime: ~5-10 minutes
```
---
## 📦 WASM Quality Gates
### Size Requirements
```yaml
wasm_size:
maximum: 500KB # Hard limit
target: 300KB # Ideal
current: TBD # Measure with `make wasm-size`
```
### Purity Requirements
```yaml
wasm_purity:
wasi_imports: 0 # Pure WASM only
js_glue: "minimal" # Only essentials
### Validation Commands
```bash
# Check WASM size
make wasm-size
# Validate WASM structure
make wasm-check
# Deep inspection with PMAT
make pmat-wasm-notebook
```
---
## 🔬 Notebook-Specific Testing
### 1. Cell Execution Tests
```rust
#[test]
fn test_cell_executes_expression() {
let mut notebook = Notebook::new();
let result = notebook.execute_cell("1 + 1");
assert_eq!(result, "2");
}
#[test]
fn test_cell_preserves_state() {
let mut notebook = Notebook::new();
notebook.execute_cell("let x = 10");
let result = notebook.execute_cell("x + 5");
assert_eq!(result, "15");
}
```
### 2. Output Formatting Tests
```rust
#[test]
fn test_rich_output_dataframe() {
let mut notebook = Notebook::new();
let result = notebook.execute_cell("df![[1, 2], [3, 4]]");
assert!(result.contains("<table>"));
}
#[test]
fn test_rich_output_error() {
let mut notebook = Notebook::new();
let result = notebook.execute_cell("undefined_var");
assert!(result.contains("Error:"));
assert!(result.contains("undefined_var"));
}
```
### 3. WASM Integration Tests
```rust
#[cfg(target_arch = "wasm32")]
#[wasm_bindgen_test]
fn test_wasm_notebook_init() {
let notebook = Notebook::new();
assert!(notebook.is_ready());
}
#[cfg(target_arch = "wasm32")]
#[wasm_bindgen_test]
fn test_wasm_cell_execution() {
let mut notebook = Notebook::new();
let result = notebook.execute_cell("2 + 2");
assert_eq!(result, "4");
}
```
### 4. Property Tests (10,000+ iterations)
```rust
#[cfg(test)]
mod property_tests {
use proptest::prelude::*;
proptest! {
#[test]
fn notebook_never_panics(code: String) {
let mut notebook = Notebook::new();
let _ = notebook.execute_cell(&code);
// Should not panic, even on invalid input
}
#[test]
fn state_isolation_property(
var_name in "[a-z]+",
value in any::<i64>()
) {
let mut nb1 = Notebook::new();
let mut nb2 = Notebook::new();
nb1.execute_cell(&format!("let {} = {}", var_name, value));
// nb2 should NOT see nb1's variables
let result = nb2.execute_cell(&var_name);
assert!(result.contains("Error"));
}
}
}
```
---
## 📚 The MD Book: Language Proof via Notebook
**Structure**:
```
docs/notebook/book/
├── src/
│ ├── SUMMARY.md # Table of contents
│ ├── 00-introduction.md # Why this book exists
│ │
│ ├── 01-basic-syntax/
│ │ ├── README.md
│ │ ├── 01-literals.md # Feature 1/41
│ │ ├── 02-variables.md # Feature 2/41
│ │ ├── 03-comments.md # Feature 3/41
│ │ └── proof.ruchy # Runnable proof
│ │
│ ├── 02-operators/
│ │ ├── README.md
│ │ ├── 01-arithmetic.md # Feature 4/41
│ │ ├── 02-comparison.md # Feature 5/41
│ │ └── proof.ruchy
│ │
│ ├── 03-control-flow/
│ │ ├── README.md
│ │ ├── 01-if-else.md # Feature 6/41
│ │ ├── 02-match.md # Feature 7/41
│ │ ├── 03-for-loops.md # Feature 8/41
│ │ └── proof.ruchy
│ │
│ ├── ... (remaining 33 features)
│ │
│ └── 15-validation/
│ ├── README.md
│ ├── 01-coverage-report.md # Test coverage proof
│ ├── 02-mutation-report.md # Mutation testing proof
│ └── 03-e2e-report.md # Playwright test proof
│
└── book.toml # mdBook configuration
```
### Book Philosophy
**Every Chapter = Empirical Proof**:
1. **Feature Description**: What it does
2. **Notebook Code**: Copy-paste into notebook
3. **Expected Output**: What you should see
4. **Test Proof**: Link to automated test
5. **Coverage Proof**: Link to coverage report
6. **Mutation Proof**: Link to mutation test
**Example Chapter** (01-basic-syntax/01-literals.md):
```markdown
# Literals - Feature 1/41
## Description
Ruchy supports literals for integers, floats, strings, booleans, and nil.
## Try it in Notebook
Open ruchy notebook and run:
\`\`\`ruchy
# Integer literal
42
# Float literal
3.14
# String literal
"hello"
# Boolean literals
true
false
# Nil literal
nil
\`\`\`
## Expected Output
\`\`\`
42
3.14
"hello"
true
false
nil
\`\`\`
## Proof
✅ **Test**: `tests/lang_comp/operators.rs::test_literals`
✅ **Coverage**: 100% (5/5 lines)
✅ **Mutation**: 100% (3/3 mutants caught)
✅ **E2E**: `tests/e2e/notebook-features.spec.ts::test_literals`
```
---
## 🎯 Implementation Plan
### Phase 4A: Notebook Core (Week 1)
**Goal**: Basic REPL-style notebook with state persistence
```yaml
tasks:
- id: "NOTEBOOK-001"
title: "Notebook core infrastructure"
tests: "30 unit tests"
coverage: "≥85% line, ≥90% branch"
- id: "NOTEBOOK-002"
title: "Cell execution engine"
tests: "20 unit tests + 100 property tests"
coverage: "≥85% line, ≥90% branch"
- id: "NOTEBOOK-003"
title: "State persistence across cells"
tests: "15 unit tests + 50 property tests"
coverage: "≥85% line, ≥90% branch"
```
### Phase 4B: Rich Output (Week 2)
**Goal**: HTML tables, syntax highlighting, error formatting
```yaml
tasks:
- id: "NOTEBOOK-004"
title: "Rich output formatting"
tests: "25 unit tests"
coverage: "≥85% line, ≥90% branch"
- id: "NOTEBOOK-005"
title: "DataFrame HTML rendering"
tests: "15 unit tests"
coverage: "≥85% line, ≥90% branch"
```
### Phase 4C: WASM Integration (Week 3)
**Goal**: Run in browser with full WASM compilation
```yaml
tasks:
- id: "NOTEBOOK-006"
title: "WASM notebook runtime"
tests: "20 WASM tests"
wasm_size: "<500KB"
wasm_purity: "0 WASI imports"
- id: "NOTEBOOK-007"
title: "Browser integration"
tests: "30 E2E tests (Playwright)"
browsers: "Chrome, Firefox, Safari"
```
### Phase 4D: The Book (Week 4)
**Goal**: 41-chapter MD book proving all features work
```yaml
tasks:
- id: "NOTEBOOK-008"
title: "MD book structure"
chapters: 41
proof_type: "Automated test + coverage + mutation"
- id: "NOTEBOOK-009"
title: "Automated proof generation"
description: "Script that extracts test results into book"
```
---
## 🚀 Makefile Targets
```makefile
# ============================================================================
# Notebook Quality Gates (3-Level System)
# ============================================================================
notebook-quality-fast: fmt clippy test-notebook-core
@echo "✅ Notebook fast quality gate passed (<30s)"
notebook-quality-complete: notebook-quality-fast test-notebook-all coverage-notebook
@echo "✅ Notebook complete quality gate passed (~5min)"
notebook-quality-extreme: notebook-quality-complete mutants-notebook e2e-notebook
@echo "✅ Notebook extreme quality gate passed (~10-15min)"
# ============================================================================
# Notebook Testing
# ============================================================================
test-notebook-core:
@cargo test --features notebook --test notebook_core
test-notebook-all:
@cargo test --features notebook --all
# ============================================================================
# Notebook Coverage
# ============================================================================
coverage-notebook:
@cargo llvm-cov --features notebook --branch --html
@# Verify thresholds
@cargo llvm-cov --features notebook --fail-under-lines 85
@# Branch coverage check
@echo "Checking branch coverage ≥90%..."
# ============================================================================
# Notebook Mutation Testing
# ============================================================================
mutants-notebook:
@cargo mutants --features notebook --file src/notebook/*.rs
mutants-notebook-fast:
@cargo mutants --features notebook --in-diff HEAD~1
# ============================================================================
# Notebook E2E Testing
# ============================================================================
e2e-notebook:
@npx playwright test tests/e2e/notebook*.spec.ts
e2e-notebook-ui:
@npx playwright test tests/e2e/notebook*.spec.ts --ui
# ============================================================================
# Notebook WASM
# ============================================================================
wasm-notebook:
@cargo build --features notebook --target wasm32-unknown-unknown --release
@wasm-bindgen target/wasm32-unknown-unknown/release/ruchy.wasm \
--out-dir dist/notebook --target web
wasm-notebook-size:
@stat -c%s dist/notebook/ruchy_bg.wasm | awk '{print "WASM size: " $$1/1024 "KB"}'
wasm-notebook-check:
@# Verify size <500KB
@# Verify 0 WASI imports
# ============================================================================
# The Book
# ============================================================================
book-build:
@mdbook build docs/notebook/book
book-serve:
@mdbook serve docs/notebook/book --open
book-proof-generate:
@# Extract test results, coverage, mutation into book chapters
@python3 scripts/generate_book_proofs.py
```
---
## ✅ Success Criteria
**Notebook is production-ready when**:
1. ✅ All 41 language features work in notebook
2. ✅ Line coverage ≥85%, branch coverage ≥90%
3. ✅ Mutation score ≥90%
4. ✅ E2E tests pass on 3 browsers
5. ✅ WASM binary <500KB with 0 WASI imports
6. ✅ MD book with 41 chapters of empirical proof
7. ✅ All quality gates pass (fast/complete/extreme)
**Result**: A notebook that **empirically proves** Ruchy is production-ready.