68 lines
1.5 KiB
Rust
68 lines
1.5 KiB
Rust
use iced::Center;
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use iced::widget::{Column, button, column, text};
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pub fn main() -> iced::Result {
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iced::run(Counter::update, Counter::view)
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}
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#[derive(Default)]
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struct Counter {
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value: i64,
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}
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#[derive(Debug, Clone, Copy)]
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enum Message {
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Increment,
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Decrement,
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}
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impl Counter {
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fn update(&mut self, message: Message) {
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match message {
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Message::Increment => {
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self.value += 1;
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}
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Message::Decrement => {
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self.value -= 1;
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}
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}
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}
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fn view(&self) -> Column<Message> {
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column![
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button("Increment").on_press(Message::Increment),
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text(self.value).size(50),
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button("Decrement").on_press(Message::Decrement)
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]
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.padding(20)
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.align_x(Center)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use iced_test::selector::text;
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use iced_test::{Error, simulator};
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#[test]
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fn it_counts() -> Result<(), Error> {
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let mut counter = Counter { value: 0 };
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let mut ui = simulator(counter.view());
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let _ = ui.click(text("Increment"))?;
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let _ = ui.click(text("Increment"))?;
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let _ = ui.click(text("Decrement"))?;
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for message in ui.into_messages() {
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counter.update(message);
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}
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assert_eq!(counter.value, 1);
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let mut ui = simulator(counter.view());
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assert!(ui.find(text("1")).is_ok(), "Counter should display 1!");
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Ok(())
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}
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}
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