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50 lines
1.4 KiB
Rust
50 lines
1.4 KiB
Rust
pub fn parse_args(args: &str) -> impl Iterator<Item = (&str, &str)> {
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//transform a group of argument into an iterator of key and value
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args.split('&').filter_map(|kv| parse_keyvalue(&kv))
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}
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fn parse_keyvalue(kv: &str) -> Option<(&str, &str)> {
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//convert a single key-value pair into a key and a value
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if let Some(pos) = kv.find('=') {
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let (key, value) = kv.split_at(pos + 1);
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Some((&key[0..pos], value))
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} else {
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None
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}
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}
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#[cfg(test)]
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mod tests {
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use utils::{parse_args, parse_keyvalue};
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#[test]
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fn test_parse_keyvalue() {
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assert_eq!(
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parse_keyvalue("a_key=a_value").unwrap(),
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("a_key", "a_value")
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);
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assert_eq!(parse_keyvalue("=a_value").unwrap(), ("", "a_value"));
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assert_eq!(parse_keyvalue("a_key=").unwrap(), ("a_key", ""));
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assert_eq!(
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parse_keyvalue("a_key=a=value").unwrap(),
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("a_key", "a=value")
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);
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assert_eq!(parse_keyvalue("=").unwrap(), ("", ""));
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assert!(parse_keyvalue("a_key_a_value").is_none());
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assert!(parse_keyvalue("").is_none());
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}
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#[test]
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fn test_parse_args() {
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let mut it = parse_args("key1=value1&key2&=&&key3=");
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assert_eq!(it.next().unwrap(), ("key1", "value1"));
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assert_eq!(it.next().unwrap(), ("", ""));
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assert_eq!(it.next().unwrap(), ("key3", ""));
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assert!(it.next().is_none());
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}
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}
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