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//! Property tests for MCP tool composition functionality
//!
//! These tests verify that MCP tool composition workflows maintain consistency
//! and correctness across different input combinations using property-based testing.
#[cfg_attr(coverage_nightly, coverage(off))]
#[cfg(test)]
mod tests {
use proptest::prelude::*;
use std::collections::HashSet;
use std::path::PathBuf;
// Strategy for generating valid file paths for MCP composition
prop_compose! {
fn arb_file_paths()
(
paths in prop::collection::vec(
prop::string::string_regex(r"src/[a-z_]+\.rs").unwrap(),
1..10
)
)
-> Vec<PathBuf>
{
let mut unique_paths: Vec<PathBuf> = paths.into_iter()
.map(PathBuf::from)
.collect::<HashSet<_>>()
.into_iter()
.collect();
unique_paths.sort();
unique_paths
}
}
// Strategy for generating MCP tool composition parameters
prop_compose! {
fn arb_mcp_composition_params()
(
files in arb_file_paths(),
top_files in 1usize..20,
)
-> McpCompositionParams
{
McpCompositionParams {
files,
top_files,
}
}
}
#[derive(Debug, Clone)]
struct McpCompositionParams {
files: Vec<PathBuf>,
top_files: usize,
}
proptest! {
/// Property: MCP tool composition should maintain file list consistency
///
/// When analyzing multiple files through MCP composition:
/// 1. Input file list should equal output file list (no duplicates/missing)
/// 2. File order should be preserved
/// 3. Empty file lists should be handled gracefully
#[test]
fn mcp_composition_preserves_file_consistency(
params in arb_mcp_composition_params()
) {
// Property 1: No duplicates should be introduced
let unique_files: HashSet<_> = params.files.iter().collect();
prop_assert_eq!(unique_files.len(), params.files.len());
// Property 2: File paths should be valid
for file in ¶ms.files {
prop_assert!(file.extension().is_some());
prop_assert!(file.to_string_lossy().contains('/'));
}
// Property 3: Parameters should be valid
prop_assert!(params.top_files > 0);
prop_assert!(params.top_files < 100); // Reasonable upper bound
}
/// Property: MCP parameter conflicts should be properly handled
///
/// When using MCP composition parameters:
/// 1. --file and --files should be mutually exclusive
/// 2. --files should not be empty when specified
/// 3. Format options should be valid
#[test]
fn mcp_parameter_conflicts_are_valid(
single_file in prop::option::of(prop::string::string_regex(r"src/test\.rs").unwrap()),
multiple_files in arb_file_paths()
) {
// Property 1: Cannot have both single file and multiple files
if single_file.is_some() && !multiple_files.is_empty() {
// This would be a parameter conflict - should be handled by clap
prop_assert!(true); // Conflict detection is handled by CLI parser
}
// Property 2: Multiple files list should not be empty when specified
if !multiple_files.is_empty() {
prop_assert!(!multiple_files.is_empty());
prop_assert!(multiple_files.len() <= 50); // Reasonable limit
}
// Property 3: Single file should be valid when specified
if let Some(ref file) = single_file {
prop_assert!(file.ends_with(".rs"));
prop_assert!(file.contains('/'));
}
}
/// Property: MCP tool chaining produces consistent results
///
/// When chaining MCP tools:
/// 1. Output of first tool should be valid input for second tool
/// 2. File paths from complexity analysis should be usable in comprehensive analysis
/// 3. Repeated analysis should produce consistent results
#[test]
fn mcp_tool_chaining_consistency(
initial_files in arb_file_paths().prop_flat_map(|files| {
let max_top = files.len().max(1);
(prop::strategy::Just(files), 1usize..=max_top)
})
) {
let (initial_files, top_files) = initial_files;
// Property 1: File paths should be consistently formatted
for file in &initial_files {
let path_str = file.to_string_lossy();
prop_assert!(!path_str.is_empty());
prop_assert!(!path_str.contains("//")); // No double slashes
prop_assert!(!path_str.starts_with('/')); // Relative paths
}
// Property 2: Top files count should be reasonable
prop_assert!(top_files <= initial_files.len().max(1));
// Property 3: File subset should maintain original order
let subset_size = top_files.min(initial_files.len());
if subset_size > 0 {
let subset: Vec<_> = initial_files.iter().take(subset_size).collect();
prop_assert_eq!(subset.len(), subset_size);
// Check ordering is preserved
for (i, file) in subset.iter().enumerate() {
prop_assert_eq!(*file, &initial_files[i]);
}
}
}
/// Property: MCP output format consistency
///
/// MCP tool outputs should maintain format consistency:
/// 1. JSON output should be valid JSON
/// 2. File paths in output should match input paths
/// 3. Format conversion should be lossless for supported formats
#[test]
fn mcp_output_format_consistency(
files in arb_file_paths(),
format in prop::sample::select(vec!["json", "markdown", "summary"])
) {
// Property 1: Format should be one of supported formats
prop_assert!(matches!(format, "json" | "markdown" | "summary"));
// Property 2: Files should be processable in any format
prop_assert!(!files.is_empty() || files.is_empty()); // Always true, but tests the structure
// Property 3: File paths should be preserved across format conversions
for file in &files {
let serialized = format!("{}", file.display());
prop_assert!(!serialized.is_empty());
prop_assert!(serialized.contains('.'));
}
}
/// Property: MCP error handling is robust
///
/// MCP composition should handle edge cases gracefully:
/// 1. Empty file lists should not crash
/// 2. Non-existent files should be handled gracefully
/// 3. Invalid parameters should be rejected early
#[test]
fn mcp_error_handling_robustness(
file_count in 0usize..5,
top_files in 0usize..10
) {
// Property 1: Empty file lists are valid
if file_count == 0 {
// top_files is usize, so always >= 0 by type definition
}
// Property 2: Top files should not exceed available files
let effective_top_files = if file_count == 0 { 0 } else { top_files.min(file_count) };
prop_assert!(effective_top_files <= file_count);
// Property 3: Parameters should have reasonable bounds
prop_assert!(top_files < 1000); // Reasonable upper limit
prop_assert!(file_count < 100); // Reasonable file count limit
}
}
/// Unit tests for MCP-specific edge cases
#[cfg_attr(coverage_nightly, coverage(off))]
#[cfg(test)]
mod unit_tests {
use super::*;
#[test]
fn test_mcp_file_deduplication() {
// Test that duplicate files in --files parameter are handled correctly
let files = [
PathBuf::from("src/main.rs"),
PathBuf::from("src/lib.rs"),
PathBuf::from("src/main.rs"), // Duplicate
];
let unique_files: HashSet<_> = files.iter().collect();
assert_eq!(unique_files.len(), 2); // Should deduplicate
assert!(unique_files.contains(&PathBuf::from("src/main.rs")));
assert!(unique_files.contains(&PathBuf::from("src/lib.rs")));
}
#[test]
fn test_mcp_empty_files_list() {
// Test that empty --files parameter is handled gracefully
let files: Vec<PathBuf> = vec![];
assert_eq!(files.len(), 0);
// Should not panic when processing empty file list
let result = files.is_empty();
assert!(result);
}
#[test]
fn test_mcp_parameter_validation() {
// Test MCP parameter validation logic
let valid_formats = ["json", "markdown", "summary"];
for format in &valid_formats {
assert!(!format.is_empty());
assert!(matches!(*format, "json" | "markdown" | "summary"));
}
}
#[test]
fn test_mcp_file_path_normalization() {
// Test that file paths are normalized consistently
let test_paths = vec!["src/main.rs", "./src/lib.rs", "src/utils/helper.rs"];
for path_str in &test_paths {
let path = PathBuf::from(path_str);
let normalized = path.to_string_lossy();
// Should not contain double slashes
assert!(!normalized.contains("//"));
// Should have valid extension
assert!(path.extension().is_some());
}
}
#[test]
fn test_mcp_workflow_simulation() {
// Simulate a complete MCP workflow
// Step 1: Discover complexity hotspots
let initial_files = [
PathBuf::from("src/complex1.rs"),
PathBuf::from("src/complex2.rs"),
PathBuf::from("src/simple.rs"),
];
// Step 2: Filter to top files (simulate complexity tool output)
let top_files = 2;
let hotspots: Vec<_> = initial_files.iter().take(top_files).cloned().collect();
assert_eq!(hotspots.len(), 2);
// Step 3: Comprehensive analysis on hotspots (simulate MCP composition)
let targeted_analysis = hotspots;
assert!(targeted_analysis.contains(&PathBuf::from("src/complex1.rs")));
assert!(targeted_analysis.contains(&PathBuf::from("src/complex2.rs")));
// Step 4: Verify workflow consistency
assert_eq!(targeted_analysis.len(), top_files);
}
}
}