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use std::fmt;
use std::fs;
use std::io::{self, Read};
use std::path;
use Predicate;
fn read_file(path: &path::Path) -> io::Result<Vec<u8>> {
let mut buffer = Vec::new();
fs::File::open(path)?.read_to_end(&mut buffer)?;
Ok(buffer)
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct BinaryFilePredicate {
path: path::PathBuf,
content: Vec<u8>,
}
impl BinaryFilePredicate {
fn eval(&self, path: &path::Path) -> io::Result<bool> {
let content = read_file(path)?;
Ok(self.content == content)
}
pub fn utf8(self) -> Option<StrFilePredicate> {
let path = self.path;
let content = String::from_utf8(self.content).ok()?;
Some(StrFilePredicate { path, content })
}
}
impl Predicate<path::Path> for BinaryFilePredicate {
fn eval(&self, path: &path::Path) -> bool {
self.eval(path).unwrap_or(false)
}
}
impl Predicate<[u8]> for BinaryFilePredicate {
fn eval(&self, actual: &[u8]) -> bool {
self.content == actual
}
}
impl fmt::Display for BinaryFilePredicate {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "var is {}", self.path.display())
}
}
pub fn eq_file(path: &path::Path) -> BinaryFilePredicate {
let content = read_file(path).unwrap();
BinaryFilePredicate {
path: path.to_path_buf(),
content,
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct StrFilePredicate {
path: path::PathBuf,
content: String,
}
impl StrFilePredicate {
fn eval(&self, path: &path::Path) -> Option<bool> {
let content = read_file(path).ok()?;
let content = String::from_utf8(content).ok()?;
Some(self.content == content)
}
}
impl Predicate<path::Path> for StrFilePredicate {
fn eval(&self, path: &path::Path) -> bool {
self.eval(path).unwrap_or(false)
}
}
impl Predicate<str> for StrFilePredicate {
fn eval(&self, actual: &str) -> bool {
self.content == actual
}
}
impl fmt::Display for StrFilePredicate {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "var is {}", self.path.display())
}
}