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|
use crate::game_of_life::opts::Opts;
use crate::game_of_life::universe::Universe;
use clap::{Error, ErrorKind};
use regex::Regex;
#[cfg(test)]
use mocktopus::macros::mockable;
/// Generate a new Universe/Board with a parsed local file or remote URL/file
///
/// If a URL is provided as an input (starting with http/ftp) the URL/File will be downloaded
/// and parsed to generate a seeding input for the simulation
/// otherwise, it'll be assumed that it's a path to a local file that will be parsed, and
/// used as the seeding input
#[cfg_attr(test, mockable)]
pub(crate) fn new(opts: Opts) -> Result<Universe, Error> {
let input = opts.input.clone().unwrap();
match Regex::new("^(ht|f)tp(s)?://*").unwrap().is_match(&input) {
true => generate_url_data(opts),
false => generate_file_data(opts),
}
}
#[cfg(test)]
mod new {
use super::*;
use mocktopus::mocking::*;
fn universe_mock(opts: Opts) -> Universe {
Universe {
opts,
current: vec![vec![]],
future: vec![vec![]],
}
}
fn opts(input: Option<String>) -> Opts {
Opts {
input,
width: 13,
height: 13,
seed: 1337,
live_cell: 'L',
dead_cell: 'D',
delay: 13,
}
}
#[test]
fn with_url() {
let opts = opts(Some(String::from("https://example.com")));
generate_file_data.mock_safe(|_| panic!());
generate_url_data.mock_safe(|opts| MockResult::Return(Ok(universe_mock(opts))));
let universe = new(opts.clone()).unwrap();
assert_eq!(universe, universe_mock(opts));
}
#[test]
fn with_file() {
let opts = opts(Some(String::from("./example.txt")));
generate_file_data.mock_safe(|opts| MockResult::Return(Ok(universe_mock(opts))));
generate_url_data.mock_safe(|_| panic!());
let universe = new(opts.clone()).unwrap();
assert_eq!(universe, universe_mock(opts));
}
}
/// Reads a local file and parses it, converting alpha-numerical chars into living cells
/// and generate a new universe instance in the initial state from file
#[cfg_attr(test, mockable)]
fn generate_file_data(opts: Opts) -> Result<Universe, Error> {
let file = match std::fs::read_to_string(opts.input.clone().unwrap()) {
Ok(s) => s,
Err(e) => {
return Err(Error::with_description(
format!("{}\n", e.to_string()),
ErrorKind::Io,
))
}
};
let data: Vec<Vec<bool>> = file
.split("\n")
.map(|s| {
s.to_string()
.chars()
.map(|c| c.is_ascii_alphanumeric())
.collect()
})
.collect();
Ok(populate(opts, data))
}
#[cfg(test)]
mod generate_file_data {
use super::*;
use std::env;
use std::fs::File;
use std::io::Write;
fn opts(input: Option<String>) -> Opts {
Opts {
input,
width: 4,
height: 3,
seed: 1337,
live_cell: 'L',
dead_cell: 'D',
delay: 13,
}
}
#[test]
fn file_exists() {
let temp_file = env::temp_dir().join("file.txt");
let path = temp_file.clone().into_os_string().into_string().unwrap();
let mut file = File::create(temp_file).unwrap();
writeln!(&mut file, "--Learning Rust--").unwrap();
writeln!(&mut file, "--First attempt--").unwrap();
let opts = opts(Some(path));
let universe = generate_file_data(opts.clone()).unwrap();
assert_eq!(
universe,
Universe {
opts,
future: vec![vec![false; 4]; 3],
current: vec![
vec![false, false, true, true],
vec![false, false, true, true],
vec![false, false, false, false],
],
}
)
}
#[test]
fn file_does_not_exist() {
assert!(generate_file_data(opts(Some(String::from("./not-real.txt")),)).is_err());
}
}
/// Reads a URL and parses it, converting alpha-numerical chars into living cells
/// in a newly generated universe simulation
#[cfg_attr(test, mockable)]
fn generate_url_data(_opts: Opts) -> Result<Universe, Error> {
unimplemented!()
}
/// Return a universe struct with populated data from the data param
///
/// The data param is reshaped to fit with the opts width/height (extended or shrinked)
fn populate(opts: Opts, data: Vec<Vec<bool>>) -> Universe {
let (width, height) = (opts.width as usize, opts.height as usize);
let mut current = vec![vec![false; width]; height];
for i in 0..height {
for j in 0..width {
current[i][j] = data
.get(i)
.unwrap_or(&vec![])
.get(j)
.unwrap_or(&false)
.clone();
}
}
Universe {
opts,
current,
future: vec![vec![false; width]; height],
}
}
#[cfg(test)]
mod populate {
use super::*;
fn opts(width: isize, height: isize) -> Opts {
Opts {
width,
height,
seed: 1337,
input: None,
live_cell: 'L',
dead_cell: 'D',
delay: 13,
}
}
#[test]
fn expand_data() {
let data = vec![vec![true, false, true]; 3];
let opts = opts(5, 5);
let universe = populate(opts.clone(), data);
assert_eq!(
universe,
Universe {
opts,
future: vec![vec![false; 5]; 5],
current: vec![
vec![true, false, true, false, false],
vec![true, false, true, false, false],
vec![true, false, true, false, false],
vec![false, false, false, false, false],
vec![false, false, false, false, false],
]
}
)
}
#[test]
fn shrink_data() {
let data = vec![vec![true, false, true]; 3];
let opts = opts(2, 2);
let universe = populate(opts.clone(), data);
assert_eq!(
universe,
Universe {
opts,
future: vec![vec![false; 2]; 2],
current: vec![vec![true, false], vec![true, false]]
}
)
}
}
|
