test_tools 0.19.1

//! Tests for API Stability Facade functionality (Task 011)
//!
//! These tests verify that `test_tools` maintains a stable public API facade
//! that shields users from breaking changes in underlying constituent crates (FR-3).
//!
//! ## TDD Approach
//! These tests are written FIRST and will initially FAIL, demonstrating
//! the need for implementing API stability mechanisms in Task 012.

#![cfg(feature = "integration")]

#[ cfg(test) ]
mod api_stability_facade_tests 
{

  /// Test that core testing functions maintain stable signatures
  /// regardless of changes in underlying crate implementations
  #[ test ]
  fn test_stable_testing_function_signatures()
  {
  // Verify that SmokeModuleTest ::new maintains consistent signature
  let smoke_test = test_tools ::SmokeModuleTest ::new("test_crate");
  assert_eq!(smoke_test.dependency_name, "test_crate");
  
  // Verify that perform method exists with expected signature
  // This should fail initially if stability facade is not implemented
  let _result: Result< (), Box<dyn core ::error ::Error >> = smoke_test.perform();
  
  // If we reach here without compilation errors, basic signature stability exists
  // Test passes when perform() method exists with expected signature
 }

  /// Test that collection type re-exports remain stable
  /// even if underlying `collection_tools` changes its API
  #[ test ]  
  fn test_stable_collection_type_reexports()
  {
  // Verify that common collection types maintain stable access patterns
  let _btree_map: test_tools ::BTreeMap< i32, String > = test_tools ::BTreeMap ::new();
  let _hash_map: test_tools ::HashMap< i32, String > = test_tools ::HashMap ::new();
  let _vec: test_tools ::Vec< i32 > = test_tools ::Vec ::new();
  let _hash_set: test_tools ::HashSet< i32 > = test_tools ::HashSet ::new();
  
  // This test fails if collection types are not properly facade-wrapped
  // to protect against breaking changes in collection_tools
  // Collection type stability verified through successful compilation above
 }

  /// Test that namespace access patterns remain stable
  /// protecting against `mod_interface` changes in constituent crates
  #[ test ]
  fn test_stable_namespace_access_patterns()
  {
  // Test own namespace stability
  let _ = test_tools ::own ::BTreeMap :: < String, i32 > ::new();
  
  // Test exposed namespace stability  
  let _ = test_tools ::exposed ::HashMap :: < String, i32 > ::new();
  
  // Test prelude namespace stability
  // This should work regardless of changes in underlying crate preludes
  // NOTE: This currently fails - demonstrating need for API stability facade
  let _smoke_test_attempt = test_tools ::SmokeModuleTest ::new("stability_test");
  
  // Namespace access patterns verified through successful compilation above
 }

  /// Test that diagnostic and assertion utilities maintain stable APIs
  /// protecting against changes in `diagnostics_tools` or `error_tools`
  #[ test ]
  fn test_stable_diagnostic_utilities()
  {
  // Test that debugging assertions maintain stable signatures
  let value1 = 42;
  let value2 = 42;
  
  // These should remain stable regardless of underlying implementation changes
  test_tools ::debug_assert_identical!(value1, value2);
  test_tools ::debug_assert_id!(value1, value2);
  
  // Test error handling stability
  // This tests that ErrWith trait remains accessible through stable facade
  // NOTE: ErrWith trait accessibility verified through compilation success
  
  // Diagnostic utilities stability verified through successful API access above
 }

  /// Test that feature-dependent functionality remains stable
  /// across different feature flag combinations
  #[ test ]
  fn test_stable_feature_dependent_api()
  {
  // Test that collection constructor access is stable when features are enabled
  #[ cfg(feature = "collection_constructors") ]
  {
   // These should be accessible through exposed namespace for stability
   let heap_collection = test_tools ::exposed ::heap![1, 2, 3];
   assert_eq!(heap_collection.len(), 3);
 }
  
  // Test that basic functionality works regardless of feature configuration
  let smoke_test = test_tools ::SmokeModuleTest ::new("feature_test");
  let _result = smoke_test.clean(false);  // Should not panic
  
  // Feature-dependent API stability verified through successful compilation above
 }

  /// Test that dependency module provides stable access to constituent crates
  /// shielding users from internal dependency organization changes
  #[ test ] 
  fn test_stable_dependency_module_access()
  {
  // Test that trybuild remains accessible through dependency module
  // This protects against changes in how trybuild is integrated
  let _trybuild_ref = test_tools ::dependency ::trybuild ::TestCases ::new();
  
  // Test that collection_tools remains accessible when not in standalone mode
  #[ cfg(not(all(feature = "standalone_build", not(feature = "normal_build")))) ]
  {
   let _collection_map = test_tools ::dependency ::collection_tools ::BTreeMap :: < i32, String > ::new();
 }
  
  // Test other stable dependency access
  // These should remain available regardless of internal refactoring
  // Dependency module stability verified through successful API access above
 }

  /// Test that version changes in constituent crates don't break `test_tools` API
  /// This is a high-level integration test for API stability facade
  #[ test ]
  fn test_api_stability_across_dependency_versions()
  {
  // This test verifies that the stability facade successfully shields users
  // from breaking changes in constituent crates by providing a consistent API
  
  // Test 1 : Core testing functionality stability
  let mut smoke_test = test_tools ::SmokeModuleTest ::new("version_test");
  smoke_test.version("1.0.0");
  smoke_test.code("fn main() {}".to_string());
  
  // This should work regardless of changes in underlying implementation
  let form_result = smoke_test.form();
  assert!(form_result.is_ok(), "Core testing API should remain stable");
  
  // Test 2 : Collection functionality stability  
  let collections_work = {
   let _map = test_tools ::BTreeMap :: < String, i32 > ::new();
   let _set = test_tools ::HashSet :: < String > ::new();
   true
 };
  
  // Test 3 : Namespace access stability
  let namespace_access_works = {
   let _ = test_tools ::own ::BTreeMap :: < i32, String > ::new();
   let _ = test_tools ::exposed ::HashMap :: < i32, String > ::new();
   true
 };
  
  assert!(collections_work && namespace_access_works, 
   "API stability facade should protect against dependency version changes");
 }

  /// Test that backward compatibility is maintained through the stability facade
  /// ensuring existing user code continues to work across `test_tools` updates
  #[ test ]
  fn test_backward_compatibility_maintenance()
  {
  // Test that deprecated-but-stable APIs remain available
  // The stability facade should maintain these for backward compatibility
  
  // Test classic usage patterns that users may rely on
  let smoke_test = test_tools ::SmokeModuleTest ::new("backward_compat_test");
  
  // Test that old-style initialization still works
  assert_eq!(smoke_test.dependency_name, "backward_compat_test");
  
  // Test that collection types work with classic patterns
  let mut map = test_tools ::BTreeMap ::new();
  map.insert(1, "value".to_string());
  assert_eq!(map.get(&1), Some(&"value".to_string()));
  
  // Test that error handling patterns remain stable  
  // ErrWith trait accessibility verified through compilation success
  
  // Backward compatibility verified through successful API access above
 }

  /// Test that the facade properly isolates internal implementation changes
  /// from the public API surface
  #[ test ]
  fn test_implementation_isolation_through_facade()
  {
  // This test verifies that internal changes in constituent crates
  // are properly isolated by the stability facade
  
  // Test that smoke testing works regardless of internal process_tools changes
  let smoke_test = test_tools ::SmokeModuleTest ::new("isolation_test");
  // NOTE: This demonstrates API inconsistency that stability facade should resolve
  assert_eq!(smoke_test.dependency_name, "isolation_test");
  
  // Test that collection access works regardless of internal collection_tools changes
  use test_tools :: *;
  let _map = BTreeMap :: < String, i32 > ::new();
  let _set = HashSet :: < String > ::new();
  
  // Test that diagnostic tools work regardless of internal diagnostics_tools changes
  let value = 42;
  test_tools ::debug_assert_identical!(value, 42);
  
  // Implementation isolation verified through successful API access above
 }

  /// Test that demonstrates the implemented stability feature
  /// This test now passes, showing the API stability facade is implemented
  #[ test ]
  fn test_implemented_stability_feature_demonstration()
  {
  // This test verifies that the API stability facade is now implemented
  // The test should pass, demonstrating the green phase of TDD
  
  // Test 1 : Verify stable API surface exists
  let api_surface_stable = {
   // Core testing functionality available
   let _smoke_test = test_tools ::SmokeModuleTest ::new("stability_demo");
   
   // Collection types available through stable facade
   let _map = test_tools ::BTreeMap :: < String, i32 > ::new();
   let _set = test_tools ::HashSet :: < String > ::new();
   
   // Diagnostic utilities available
   test_tools ::debug_assert_identical!(42, 42);
   
   true
 };
  
  // Test 2 : Verify namespace stability
  let namespace_stability = {
   let _own_access = test_tools ::own ::BTreeMap :: < i32, String > ::new();
   let _exposed_access = test_tools ::exposed ::HashMap :: < i32, String > ::new();
   true
 };
  
  // Test 3 : Verify dependency isolation
  let dependency_isolation = {
   // Dependencies accessible through controlled facade
   let _trybuild_access = test_tools ::dependency ::trybuild ::TestCases ::new();
   true
 };
  
  // Test 4 : Use the built-in stability verification function
  let facade_verification = test_tools ::verify_api_stability();
  
  assert!(api_surface_stable && namespace_stability && dependency_isolation && facade_verification,
   "API stability facade is now fully implemented and functional");
 }

}