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use std::io::Read;
use std::path::Path;
use std::fs::File;
use types::Config;
use parser::parse;
use error::ConfigError;
use error::{from_io_err, from_parse_err};
pub fn from_stream<T: Read>(stream: &mut T) -> Result<Config, ConfigError> {
let mut buf = String::new();
match stream.read_to_string(&mut buf) {
Ok(_) => from_str(&buf[..]),
Err(e) => Err(from_io_err(e))
}
}
pub fn from_file(path: &Path) -> Result<Config, ConfigError> {
let mut file = match File::open(path) {
Ok(f) => f,
Err(e) => return Err(from_io_err(e))
};
from_stream(&mut file)
}
pub fn from_str(input: &str) -> Result<Config, ConfigError> {
parse(input).map_err(|e| from_parse_err(e))
}
#[cfg(test)]
mod test {
use super::{from_str, from_stream, from_file};
use types::Config;
use types::{SettingsList, Setting, Value, ScalarValue};
use error::{ConfigErrorKind};
use std::io::{Read, Cursor};
use std::io::Error as IoError;
use std::io::ErrorKind;
use std::io::Result as IoResult;
use std::path::Path;
struct BadStrCursor<'a> {
cursor: Cursor<&'a [u8]>,
calls: u16,
max_calls_before_err: u16
}
impl<'a> BadStrCursor<'a> {
fn new(data: &'a [u8], max_calls: u16) -> BadStrCursor<'a> {
BadStrCursor { cursor: Cursor::new(data), calls: 0, max_calls_before_err: max_calls }
}
}
impl<'a> Read for BadStrCursor<'a> {
fn read(&mut self, buf: &mut [u8]) -> IoResult<usize> {
self.calls += 1;
if self.calls >= self.max_calls_before_err {
Err(IoError::new(ErrorKind::Other, "An I/O error has occurred."))
} else {
self.cursor.read(buf)
}
}
}
#[test]
fn conf_from_str() {
let parsed = from_str("windows=NO;\nlinux = true;\nUNIX\t=\nFaLsE;\n");
assert!(parsed.is_ok());
let mut expected = SettingsList::new();
expected.insert("windows".to_string(),
Setting::new("windows".to_string(),
Value::Svalue(ScalarValue::Boolean(false))));
expected.insert("linux".to_string(),
Setting::new("linux".to_string(),
Value::Svalue(ScalarValue::Boolean(true))));
expected.insert("UNIX".to_string(),
Setting::new("UNIX".to_string(),
Value::Svalue(ScalarValue::Boolean(false))));
assert_eq!(parsed.unwrap(), Config::new(expected));
}
#[test]
fn conf_from_str_parse_err() {
let parsed = from_str("windows=NO\nlinux=true;\n");
assert!(parsed.is_err());
assert_eq!(parsed.unwrap_err().kind, ConfigErrorKind::ParseError);
}
#[test]
fn conf_from_stream() {
let sample_conf = "windows=NO;\nlinux = true;\nUNIX\t=\nFaLsE;\n";
let mut cursor = Cursor::new(sample_conf.as_bytes());
let parsed = from_stream(&mut cursor);
assert!(parsed.is_ok());
let mut expected = SettingsList::new();
expected.insert("windows".to_string(),
Setting::new("windows".to_string(),
Value::Svalue(ScalarValue::Boolean(false))));
expected.insert("linux".to_string(),
Setting::new("linux".to_string(),
Value::Svalue(ScalarValue::Boolean(true))));
expected.insert("UNIX".to_string(),
Setting::new("UNIX".to_string(),
Value::Svalue(ScalarValue::Boolean(false))));
assert_eq!(parsed.unwrap(), Config::new(expected));
}
#[test]
fn conf_from_stream_parse_err() {
let sample_conf = "windows=NO\nlinux = true;\n";
let mut cursor = Cursor::new(sample_conf.as_bytes());
let parsed = from_stream(&mut cursor);
assert!(parsed.is_err());
assert_eq!(parsed.unwrap_err().kind, ConfigErrorKind::ParseError);
}
#[test]
fn conf_from_stream_io_err() {
let sample_conf = "windows=NO;\nlinux = true;\n";
let mut bad_cursor = BadStrCursor::new(sample_conf.as_bytes(), 1);
let parsed = from_stream(&mut bad_cursor);
assert!(parsed.is_err());
assert_eq!(parsed.unwrap_err().kind, ConfigErrorKind::IoError);
}
#[test]
fn conf_from_file() {
let parsed = from_file(Path::new("tests/sample.conf"));
assert!(parsed.is_ok());
}
}