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-rw-r--r--crates/libsyntax2/src/lexer/ptr.rs78
1 files changed, 78 insertions, 0 deletions
diff --git a/crates/libsyntax2/src/lexer/ptr.rs b/crates/libsyntax2/src/lexer/ptr.rs
index aa59e33cc..c9a5354ea 100644
--- a/crates/libsyntax2/src/lexer/ptr.rs
+++ b/crates/libsyntax2/src/lexer/ptr.rs
@@ -86,3 +86,81 @@ impl<'s> Ptr<'s> {
86 self.text[len as usize..].chars() 86 self.text[len as usize..].chars()
87 } 87 }
88} 88}
89
90#[cfg(test)]
91mod tests {
92 use super::*;
93
94 #[test]
95 fn test_current() {
96 let ptr = Ptr::new("test");
97 assert_eq!(ptr.current(), Some('t'));
98 }
99
100 #[test]
101 fn test_nth() {
102 let ptr = Ptr::new("test");
103 assert_eq!(ptr.nth(0), Some('t'));
104 assert_eq!(ptr.nth(1), Some('e'));
105 assert_eq!(ptr.nth(2), Some('s'));
106 assert_eq!(ptr.nth(3), Some('t'));
107 assert_eq!(ptr.nth(4), None);
108 }
109
110 #[test]
111 fn test_at() {
112 let ptr = Ptr::new("test");
113 assert!(ptr.at('t'));
114 assert!(!ptr.at('a'));
115 }
116
117 #[test]
118 fn test_at_str() {
119 let ptr = Ptr::new("test");
120 assert!(ptr.at_str("t"));
121 assert!(ptr.at_str("te"));
122 assert!(ptr.at_str("test"));
123 assert!(!ptr.at_str("tests"));
124 assert!(!ptr.at_str("rust"));
125 }
126
127 #[test]
128 fn test_at_p() {
129 let ptr = Ptr::new("test");
130 assert!(ptr.at_p(|c| c == 't'));
131 assert!(!ptr.at_p(|c| c == 'e'));
132 }
133
134 #[test]
135 fn test_nth_is_p() {
136 let ptr = Ptr::new("test");
137 assert!(ptr.nth_is_p(0,|c| c == 't'));
138 assert!(!ptr.nth_is_p(1,|c| c == 't'));
139 assert!(ptr.nth_is_p(3,|c| c == 't'));
140 assert!(!ptr.nth_is_p(150,|c| c == 't'));
141 }
142
143 #[test]
144 fn test_bump() {
145 let mut ptr = Ptr::new("test");
146 assert_eq!(ptr.current(), Some('t'));
147 ptr.bump();
148 assert_eq!(ptr.current(), Some('e'));
149 ptr.bump();
150 assert_eq!(ptr.current(), Some('s'));
151 ptr.bump();
152 assert_eq!(ptr.current(), Some('t'));
153 ptr.bump();
154 assert_eq!(ptr.current(), None);
155 ptr.bump();
156 assert_eq!(ptr.current(), None);
157 }
158
159 #[test]
160 fn test_bump_while() {
161 let mut ptr = Ptr::new("test");
162 assert_eq!(ptr.current(), Some('t'));
163 ptr.bump_while(|c| c != 's');
164 assert_eq!(ptr.current(), Some('s'));
165 }
166}