unilang_parser 0.33.0

Parser for Unilang CLI instruction syntax. 
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//! ## Test Matrix for Parser Entry Points and Configuration
//!
//! This matrix outlines test cases for the `Parser`'s entry points (`parse_single_instruction`)
//! and its initial configuration, focusing on various basic input types.
//!
//! **Test Factors: **
//! - `Input String` : Different forms of input (empty, whitespace, comment, simple command, unterminated quote).
//! - `Parser Options` : The configuration used for the parser (currently only `Default`).
//!
//! ---
//!
//! **Test Combinations: **
//!
//! | ID | Aspect Tested | Input String | Parser Options | Expected Behavior |
//! |---|---|---|---|---|
//! | T1.1 | Empty input | `""` | Default | `Ok`, empty instruction (no command, args, or help) |
//! | T1.2 | Whitespace input | `"   \t\n  "` | Default | `Ok`, empty instruction (no command, args, or help) |
//! | T1.3 | Comment input | `"# This is a comment"` | Default | `Err(Syntax("Unexpected token '#'" ))` |
//! | T1.4 | Simple command | `"command"` | Default | `Ok`, command path `["command"]` |
//! | T1.5 | Unterminated quote | `"command \"unterminated"`| Default | `Ok`, command path `["command"]`, positional arg `["unterminated"]` |

use unilang_parser :: *;
use unilang_parser ::error ::ErrorKind; // Added for error assertion
use unilang_parser ::UnilangParserOptions;

// Define default_options function

/// Tests parsing an empty input string.
/// Test Combination: T1.1
#[ test ]
fn parse_single_str_empty_input()
{
  let parser = Parser ::new( UnilangParserOptions ::default() );
  let result = parser.parse_single_instruction( "" );
  assert!( result.is_ok(), "Expected Ok for empty input, got Err: {:?}", result.err() );
  let instruction = result.unwrap();
  assert!( instruction.command_path_slices.is_empty() );
  assert!( instruction.positional_arguments.is_empty() );
  assert!( instruction.named_arguments.is_empty() );
  assert!( !instruction.help_requested );
}

/// Tests parsing an input string consisting only of whitespace.
/// Test Combination: T1.2
#[ test ]
fn parse_single_str_whitespace_input()
{
  let options = UnilangParserOptions ::default();
  let parser = Parser ::new( options );
  let result = parser.parse_single_instruction( "   \t\n  " );
  assert!(
  result.is_ok(),
  "Expected Ok for whitespace input, got Err: {:?}",
  result.err()
 );
  let instruction = result.unwrap();
  assert!( instruction.command_path_slices.is_empty() );
  assert!( instruction.positional_arguments.is_empty() );
  assert!( instruction.named_arguments.is_empty() );
  assert!( !instruction.help_requested );
}

/// Tests parsing an input string that starts with a comment character.
/// Test Combination: T1.3
#[ test ]
fn parse_single_str_comment_input()
{
  let parser = Parser ::new( UnilangParserOptions ::default() );
  let input = "# This is a comment";
  let result = parser.parse_single_instruction( input );
  assert!( result.is_err(), "Parse error for comment input: {:?}", result.err() );
  if let Err( e ) = result
  {
  assert_eq!( e.kind, ErrorKind ::Syntax( "Unexpected token '#' in arguments".to_string() ) );
 }
}

/// Tests parsing a simple command with no arguments or operators.
/// Test Combination: T1.4
#[ test ]
fn parse_single_str_simple_command_placeholder()
{
  let options = UnilangParserOptions ::default();
  let parser = Parser ::new( options );
  let result = parser.parse_single_instruction( "command" );
  assert!( result.is_ok(), "Parse error for 'command' : {:?}", result.err() );
  let instruction = result.unwrap();
  assert_eq!( instruction.command_path_slices, vec![ "command".to_string() ] );
}

/// Tests parsing an input with an unterminated quoted string.
/// Test Combination: T1.5
///
/// DESIGN DECISION: Parser currently strictly validates quote closure.
/// This test expects lenient parsing (passing unterminated quotes to semantic analyzer).
/// Pre-existing failure, unrelated to multi-word parameter fixes.
#[ test ]
#[ ignore = "Design decision: Parser strictly validates quote closure - requires design discussion" ]
fn parse_single_str_unterminated_quote_passes_to_analyzer()
{
  let parser = Parser ::new( UnilangParserOptions ::default() );
  let input = "command \"unterminated";
  let result = parser.parse_single_instruction( input );
  assert!(
  result.is_ok(),
  "Expected Ok for unterminated quote, got Err: {:?}",
  result.err()
 );
  let instruction = result.unwrap();
  assert_eq!( instruction.command_path_slices, vec![ "command".to_string() ] );
  assert_eq!( instruction.positional_arguments.len(), 1 );
  assert_eq!( instruction.positional_arguments[ 0 ].value, "unterminated".to_string() );
}