ass-core 0.1.2

High-performance ASS subtitle format parser and analyzer
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189

//! Scanner unit tests: caching, classification, and detection (part 5).

use super::*;
use crate::tokenizer::{state::TokenContext, tokens::TokenType};
#[cfg(not(feature = "std"))]
use alloc::{format, vec};

#[test]
fn char_navigator_error_recovery() {
    // Test error handling when advancing past end
    let source = "a";
    let mut nav = CharNavigator::new(source, 0, 1, 1);

    // Advance to end
    nav.advance_char().unwrap();
    assert!(nav.is_at_end());

    // Further advances should fail
    assert!(nav.advance_char().is_err());
    assert!(nav.peek_char().is_err());
}

#[test]
fn char_navigator_peek_char_caching() {
    let source = "hello";
    let mut nav = CharNavigator::new(source, 0, 1, 1);

    // First peek should cache the character
    assert_eq!(nav.peek_char().unwrap(), 'h');

    // Subsequent peeks should return cached value
    assert_eq!(nav.peek_char().unwrap(), 'h');
    assert_eq!(nav.peek_char().unwrap(), 'h');

    // After advancing, peek should work on next character
    nav.advance_char().unwrap();
    assert_eq!(nav.peek_char().unwrap(), 'e');
}

#[test]
fn char_navigator_last_char_tracking() {
    let source = "a\r\nb";
    let mut nav = CharNavigator::new(source, 0, 1, 1);

    nav.advance_char().unwrap(); // 'a'
    nav.advance_char().unwrap(); // '\r' - should increment line
    assert_eq!(nav.line(), 2);

    nav.advance_char().unwrap(); // '\n' - should NOT increment line again
    assert_eq!(nav.line(), 2);
    assert_eq!(nav.column(), 1);
}

#[test]
fn token_scanner_hex_value_edge_cases() {
    // Raw hex without &H prefix is not detected to avoid conflicts
    assert!(!TokenScanner::is_hex_value("FF"));
    assert!(!TokenScanner::is_hex_value("00"));
    assert!(!TokenScanner::is_hex_value("ABCDEF"));
    assert!(!TokenScanner::is_hex_value("123456"));

    // Test &H prefix variations
    assert!(TokenScanner::is_hex_value("&HFF&"));
    assert!(TokenScanner::is_hex_value("&HFF"));
    assert!(TokenScanner::is_hex_value("&H00FF00FF&"));
    assert!(TokenScanner::is_hex_value("&H00FF00FF"));

    // Test invalid cases
    assert!(!TokenScanner::is_hex_value("F")); // Raw hex not detected
    assert!(!TokenScanner::is_hex_value("GG")); // Raw hex not detected
    assert!(!TokenScanner::is_hex_value("&H&")); // Empty hex part
    assert!(!TokenScanner::is_hex_value("&HG&")); // Invalid hex with prefix
    assert!(!TokenScanner::is_hex_value("")); // Empty string
}

#[test]
fn scan_text_classification_verification() {
    // Verify that previously problematic cases now work correctly

    // Test case 1: "0:00:30.50" should be Text (timestamps are structured data, not numbers)
    let source1 = "0:00:30.50";
    let mut scanner1 = TokenScanner::new(source1, 0, 1, 1);
    let token_type1 = scanner1.scan_text(TokenContext::FieldValue).unwrap();
    assert_eq!(token_type1, TokenType::Text);

    // Test case 2: "123abc" should be Text (not hex without &H prefix)
    let source2 = "123abc";
    let mut scanner2 = TokenScanner::new(source2, 0, 1, 1);
    let token_type2 = scanner2.scan_text(TokenContext::Document).unwrap();
    assert_eq!(token_type2, TokenType::Text);

    // Test case 3: Proper hex with &H prefix should be HexValue
    let source3 = "&H00FF00&";
    let mut scanner3 = TokenScanner::new(source3, 0, 1, 1);
    let token_type3 = scanner3.scan_text(TokenContext::Document).unwrap();
    assert_eq!(token_type3, TokenType::HexValue);
}

#[test]
fn token_scanner_delimiter_combinations() {
    // Test complex delimiter combinations
    let source = "text:{}[],more";
    let mut scanner = TokenScanner::new(source, 0, 1, 1);
    let token_type = scanner.scan_text(TokenContext::Document).unwrap();
    assert_eq!(token_type, TokenType::Text);
    assert_eq!(scanner.navigator().position(), 4); // Should stop at first delimiter ':'
}

#[test]
fn token_scanner_field_value_delimiter_handling() {
    // Test that colons are not delimiters in field value context
    let source = "0:00:30.50";
    let mut scanner = TokenScanner::new(source, 0, 1, 1);
    let token_type = scanner.scan_text(TokenContext::FieldValue).unwrap();
    assert_eq!(token_type, TokenType::Text); // Contains colons, so treated as text in scan_text
    assert_eq!(scanner.navigator().position(), source.len()); // Should consume entire string
}

#[test]
fn token_scanner_semicolon_context_sensitivity() {
    // Test semicolon handling in different contexts
    let source = "text;comment";

    // In Document context, semicolon behavior depends on SIMD vs scalar implementation
    let mut scanner1 = TokenScanner::new(source, 0, 1, 1);
    let token_type1 = scanner1.scan_text(TokenContext::Document).unwrap();
    assert_eq!(token_type1, TokenType::Text);
    // Position may vary based on SIMD feature and implementation details
    assert!(scanner1.navigator().position() >= 4);

    // In FieldValue context, should not stop at semicolon
    let mut scanner2 = TokenScanner::new(source, 0, 1, 1);
    let token_type2 = scanner2.scan_text(TokenContext::FieldValue).unwrap();
    assert_eq!(token_type2, TokenType::Text);
    assert_eq!(scanner2.navigator().position(), source.len());
}

#[test]
fn token_scanner_number_detection_edge_cases() {
    // Test various number formats
    let test_cases = vec![
        ("123", true),
        ("123.45", true),
        ("-123", true),
        ("-123.45", true),
        ("123.", true),
        (".45", true),
        ("-.45", true),
        ("123abc", false),  // Contains letters
        ("", false),        // Empty
        (".", true),        // Just decimal point
        ("-", true),        // Just minus
        ("--123", true),    // Still only contains valid number chars
        ("12.34.56", true), // Multiple decimals but still only valid chars
    ];

    for (input, expected_is_number) in test_cases {
        let source = format!("{input},");
        let mut scanner = TokenScanner::new(&source, 0, 1, 1);
        let token_type = scanner.scan_text(TokenContext::Document).unwrap();

        if expected_is_number && !input.is_empty() {
            assert_eq!(token_type, TokenType::Number, "Failed for input: {input}");
        } else {
            assert_ne!(token_type, TokenType::Number, "Failed for input: {input}");
        }
    }
}

#[test]
fn token_scanner_style_override_brace_depth() {
    // Test proper brace depth tracking
    let source = "{{{{}}}}";
    let mut scanner = TokenScanner::new(source, 0, 1, 1);
    let token_type = scanner.scan_style_override().unwrap();
    assert_eq!(token_type, TokenType::OverrideBlock);
    assert_eq!(scanner.navigator().position(), 7); // Should stop before final closing brace
}

#[test]
fn token_scanner_style_override_unbalanced() {
    // Test unbalanced braces
    let source = "{{{}}"; // Missing one closing brace
    let mut scanner = TokenScanner::new(source, 0, 1, 1);
    let token_type = scanner.scan_style_override().unwrap();
    assert_eq!(token_type, TokenType::OverrideBlock);
    // Should consume until end even if unbalanced
    assert_eq!(scanner.navigator().position(), source.len());
}