trivial_argument_parser/argument/
builder.rs

1use crate::argument::legacy_argument::{ArgType, Argument};
2
3pub struct ArgBuilder {
4    arg_type: ArgType,
5    short_name: Option<char>,
6    long_name: Option<String>,
7}
8
9impl ArgBuilder {
10    /// Builder needs to be created with argument type specified.
11    pub fn new(arg_type: ArgType) -> ArgBuilder {
12        return ArgBuilder {
13            arg_type,
14            short_name: None,
15            long_name: None,
16        };
17    }
18
19    pub fn set_short_name(mut self, short_name: char) -> ArgBuilder {
20        self.short_name = Some(short_name);
21        return self;
22    }
23
24    pub fn set_long_name(mut self, long_name: &str) -> ArgBuilder {
25        self.long_name = Some(String::from(long_name));
26        return self;
27    }
28
29    pub fn set_type(mut self, new_type: ArgType) -> ArgBuilder {
30        self.arg_type = new_type;
31        return self;
32    }
33
34    pub fn build(&self) -> Result<Argument, String> {
35        let long = if let Some(ref l) = self.long_name {
36            Option::Some(l.as_str())
37        } else {
38            Option::None
39        };
40        Argument::new(self.short_name, long, self.arg_type)
41    }
42}
43
44#[cfg(test)]
45mod tests {
46    use super::{ArgBuilder, ArgType};
47
48    #[test]
49    fn new_works() {
50        let arg_builder = ArgBuilder::new(ArgType::Value);
51        assert_eq!(arg_builder.long_name, Option::None);
52        assert_eq!(arg_builder.short_name, Option::None);
53        assert_eq!(arg_builder.arg_type, ArgType::Value);
54    }
55
56    #[test]
57    fn build_short_works() {
58        let arg = ArgBuilder::new(ArgType::Value)
59            .set_short_name('x')
60            .build()
61            .unwrap();
62        assert_eq!(arg.short(), &Option::Some('x'));
63        assert_eq!(arg.long(), &Option::None);
64        assert_eq!(arg.arg_type(), &ArgType::Value);
65    }
66
67    #[test]
68    fn build_long_works() {
69        let arg = ArgBuilder::new(ArgType::Value)
70            .set_long_name("my_arg")
71            .build()
72            .unwrap();
73        assert_eq!(arg.long(), &Option::Some(String::from("my_arg")));
74        assert_eq!(arg.short(), &Option::None);
75        assert_eq!(arg.arg_type(), &ArgType::Value);
76    }
77
78    #[test]
79    fn build_both_works() {
80        let arg = ArgBuilder::new(ArgType::Value)
81            .set_long_name("my_arg")
82            .set_short_name('x')
83            .build()
84            .unwrap();
85        assert_eq!(arg.long(), &Option::Some(String::from("my_arg")));
86        assert_eq!(arg.short(), &Option::Some('x'));
87        assert_eq!(arg.arg_type(), &ArgType::Value);
88    }
89
90    #[test]
91    fn set_type_works() {
92        let arg = ArgBuilder::new(ArgType::Value)
93            .set_long_name("my_arg")
94            .set_type(ArgType::Flag)
95            .build()
96            .unwrap();
97        assert_eq!(arg.long(), &Option::Some(String::from("my_arg")));
98        assert_eq!(arg.short(), &Option::None);
99        assert_eq!(arg.arg_type(), &ArgType::Flag);
100    }
101}
trivial_argument_parser/argument/builder.rs

trivial_argument_parser/argument/
builder.rs
