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|
mod app;
pub mod store;
mod ui;
use app::App;
use miette::{IntoDiagnostic, Result};
use ratatui::{Terminal, backend::Backend};
use ratatui::crossterm::{
event::{
self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode, KeyEvent, KeyEventKind,
},
execute,
terminal::{EnterAlternateScreen, LeaveAlternateScreen, disable_raw_mode, enable_raw_mode},
};
use ratatui::prelude::CrosstermBackend;
#[cfg(not(tarpaulin_include))]
fn main() -> Result<()> {
enable_raw_mode().into_diagnostic()?;
let mut stdout = std::io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture).into_diagnostic()?;
let backend = CrosstermBackend::new(stdout);
let mut term = Terminal::new(backend).into_diagnostic()?;
let mut app = App::default();
app.init_context()?;
// could be error, so don't unwrap; let term restore first
let run = run_app(&mut term, &mut app);
// restore terminal
disable_raw_mode().into_diagnostic()?;
execute!(
term.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)
.into_diagnostic()?;
term.show_cursor().into_diagnostic()?;
run?;
Ok(())
}
#[cfg(not(tarpaulin_include))]
fn run_app<B: Backend>(term: &mut Terminal<B>, app: &mut App) -> Result<()> {
while !app.get_exit_status() {
term.draw(|frame| ui::draw(frame, app))
.map_err(|_| std::io::Error::new(std::io::ErrorKind::Other, "idk"))
.into_diagnostic()?;
match event::read().into_diagnostic()? {
// it's important to check that the event is a key press event as
// crossterm also emits key release and repeat events on Windows.
Event::Key(key_event) if key_event.kind == KeyEventKind::Press => {
handle_key_event(app, key_event)?;
}
_ => {}
};
}
Ok(())
}
/// Process user input and run associated app functions
fn handle_key_event(app: &mut App, key_event: KeyEvent) -> Result<()> {
match key_event.code {
KeyCode::Char('q') => app.exit()?,
KeyCode::Left => app.decrement_counter()?,
KeyCode::Right => app.increment_counter()?,
_ => {}
};
Ok(())
}
#[cfg(test)]
mod tests {
use super::*;
use app::OverflowError;
#[test]
fn handle_key_event_inc_dec() {
let mut app = App::default();
assert!(app.init_context().is_ok());
let res = handle_key_event(&mut app, KeyCode::Right.into());
assert!(res.is_ok());
assert_eq!(app.display_counter(), "1");
let res = handle_key_event(&mut app, KeyCode::Left.into());
assert!(res.is_ok());
assert_eq!(app.display_counter(), "0");
}
#[test]
fn handle_key_event_inc_n() {
let mut app = App::default();
assert!(app.init_context().is_ok());
let n = 8;
for i in 1..=n {
let res = handle_key_event(&mut app, KeyCode::Right.into());
assert!(res.is_ok());
assert_eq!(app.display_counter(), i.to_string());
}
assert_eq!(app.display_counter(), n.to_string());
}
#[test]
fn handle_key_event_inc_n_dec() {
let mut app = App::default();
assert!(app.init_context().is_ok());
let n = 8;
for i in 1..=n {
let res = handle_key_event(&mut app, KeyCode::Right.into());
assert!(res.is_ok());
assert_eq!(app.display_counter(), i.to_string());
}
assert_eq!(app.display_counter(), n.to_string());
let res = handle_key_event(&mut app, KeyCode::Left.into());
assert!(res.is_ok());
assert_eq!(app.display_counter(), (n - 1).to_string());
}
#[test]
fn handle_key_event_exit() {
let mut app = App::default();
assert!(app.init_context().is_ok());
let res = handle_key_event(&mut app, KeyCode::Char('q').into());
assert!(res.is_ok());
assert!(app.get_exit_status());
}
#[test]
fn handle_key_event_dec_error() {
let mut app = App::default();
assert!(app.init_context().is_ok());
let res = handle_key_event(&mut app, KeyCode::Left.into());
assert!(res.is_err());
let res_err = res.unwrap_err();
let casted_val = res_err
.downcast_ref::<OverflowError>()
.expect("something bad occurred");
let expected_err_msg: String = "Cannot count below 0".into();
assert_eq!(casted_val._msg, expected_err_msg);
assert_eq!(
*casted_val,
OverflowError {
_msg: expected_err_msg,
},
);
}
#[test]
fn handle_key_event_inc_error() {
let mut app = App::default();
assert!(app.init_context().is_ok());
// no pub set_counter exposed, so we manually set this
for _ in 0..u8::MAX {
assert!(app.increment_counter().is_ok());
}
let res = handle_key_event(&mut app, KeyCode::Right.into());
assert!(res.is_err());
let res_err = res.unwrap_err();
let casted_val = res_err
.downcast_ref::<OverflowError>()
.expect("something bad occurred");
let expected_err_msg: String = "Cannot count above u8::MAX".into();
assert_eq!(casted_val._msg, expected_err_msg);
assert_eq!(
*casted_val,
OverflowError {
_msg: expected_err_msg,
},
);
}
}
|
