hello,
This is the code I have from the rust book
use std::env;
use std::process;
use minigrep::Config;
fn main() {
let config = Config::new(env::args()).unwrap_or_else(|err| {
eprintln!("Problem parsing arguments: {}", err);
process::exit(1);
});
if let Err(e) = minigrep::run(config){
eprintln!("Application error: {}", e);
process::exit(1);
}
}
lib.rs
use std::error::Error;
use std::fs;
use std::env;
pub struct Config {
pub query: String,
pub filename: String,
pub case_sensitive: bool,
}
impl Config {
pub fn new(mut args: env::Args) -> Result<Config, &'static str> {
args.next();
let query = match args.next() {
Some(arg) => arg,
None => return Err("Didn't get a query string"),
};
let filename = match args.next() {
Some(arg) => arg,
None => return Err("Didn't get a file name"),
};
let case_sensitive = env::var("CASE_INSENSITIVE").is_err();
Ok(Config {
query,
filename,
case_sensitive,
})
}
}
pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
let contents = fs::read_to_string(config.filename)?;
let results = if config.case_sensitive {
search(&config.query, &contents)
} else {
search_case_insensitive(&config.query, &contents)
};
for line in results {
println!("{}", line);
}
Ok(())
}
pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
contents
.lines()
.filter(|line| line.contains(query))
.collect()
}
pub fn search_case_insensitive<'a>(query: &str,contents: &'a str,) -> Vec<&'a str> {
contents
.lines()
.filter(|line| line.contains(&query.to_lowercase()))
.collect()
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn case_sensitive() {
let query = "duct";
let contents = "\
Rust:
safe, fast, productive.
Pick three.
Duct tape.";
assert_eq!(vec!["safe, fast, productive."], search(query, contents));
}
#[test]
fn case_insensitive() {
let query = "rUsT";
let contents = "\
Rust:
safe, fast, productive.
Pick three.
Trust me.";
assert_eq!(
vec!["Rust:", "Trust me."],
search_case_insensitive(query, contents)
);
}
}
But now this test is failing and i do not see why ?
failures:
---- tests::case_insensitive stdout ----
thread 'tests::case_insensitive' panicked at 'assertion failed: `(left == right)`
left: `["Rust:", "Trust me."]`,
right: `["Trust me."]`', src/lib.rs:90:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Anyone a hint why this is failing ?