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|
mod common;
use std::cell::RefCell;
use std::rc::Rc;
use commands::{
BatchCommand, Command, CommandError, CommandHistory, CommandResult, DeleteElementsCommand,
PreviewTracker,
};
use common::{VIDEO_SECONDS, seconds, seed_project_with_video};
use scene::{ElementRef, Project};
struct RecordingCommand {
label: &'static str,
log: Rc<RefCell<Vec<&'static str>>>,
selection: Option<Vec<ElementRef>>,
}
impl RecordingCommand {
fn new(label: &'static str, log: &Rc<RefCell<Vec<&'static str>>>) -> Self {
Self {
label,
log: Rc::clone(log),
selection: None,
}
}
fn with_selection(mut self, selection: Vec<ElementRef>) -> Self {
self.selection = Some(selection);
self
}
}
impl Command for RecordingCommand {
fn execute(&mut self, _project: &mut Project) -> Result<Option<CommandResult>, CommandError> {
self.log.borrow_mut().push(self.label);
Ok(self
.selection
.clone()
.map(CommandResult::element_selection))
}
fn undo(&mut self, _project: &mut Project) {
self.log.borrow_mut().push(self.label);
}
}
#[test]
fn batch_executes_in_order_and_undoes_in_reverse() {
let (mut project, _) = seed_project_with_video();
let log = Rc::new(RefCell::new(Vec::new()));
let mut batch = BatchCommand::new(vec![
Box::new(RecordingCommand::new("first", &log)),
Box::new(RecordingCommand::new("second", &log)),
Box::new(RecordingCommand::new("third", &log)),
]);
batch.execute(&mut project).expect("execute");
assert_eq!(*log.borrow(), vec!["first", "second", "third"]);
log.borrow_mut().clear();
batch.undo(&mut project);
assert_eq!(*log.borrow(), vec!["third", "second", "first"]);
}
#[test]
fn batch_returns_latest_selection_result() {
let (mut project, _) = seed_project_with_video();
let log = Rc::new(RefCell::new(Vec::new()));
let selected = vec![ElementRef {
track_id: "main-track-1".to_string(),
element_id: "video-1".to_string(),
}];
let mut batch = BatchCommand::new(vec![
Box::new(
RecordingCommand::new("selecting", &log).with_selection(selected.clone()),
),
Box::new(RecordingCommand::new("plain", &log)),
]);
let result = batch.execute(&mut project).expect("execute");
let selection = result
.and_then(|result| result.selection)
.expect("selection result");
assert_eq!(selection.selected_elements, selected);
}
#[test]
fn history_undo_redo_roundtrip() {
let (mut project, track_id) = seed_project_with_video();
let mut history = CommandHistory::new();
assert!(!history.can_undo());
assert!(!history.can_redo());
history
.execute(
Box::new(DeleteElementsCommand::new(vec![ElementRef {
track_id: track_id.clone(),
element_id: "video-1".to_string(),
}])),
&mut project,
)
.expect("execute");
let scene = common::active_scene;
assert!(scene(&project).tracks.main.elements().is_empty());
assert!(history.can_undo());
assert!(!history.can_redo());
history.undo(&mut project);
assert_eq!(scene(&project).tracks.main.elements().len(), 1);
assert!(!history.can_undo());
assert!(history.can_redo());
history.redo(&mut project).expect("redo");
assert!(scene(&project).tracks.main.elements().is_empty());
assert!(history.can_undo());
assert!(!history.can_redo());
}
#[test]
fn history_new_execute_clears_redo_stack() {
let (mut project, track_id) = seed_project_with_video();
let mut history = CommandHistory::new();
let delete = || {
Box::new(DeleteElementsCommand::new(vec![ElementRef {
track_id: track_id.clone(),
element_id: "video-1".to_string(),
}])) as Box<dyn Command>
};
history.execute(delete(), &mut project).expect("execute");
history.undo(&mut project);
assert!(history.can_redo());
history.execute(delete(), &mut project).expect("execute");
assert!(!history.can_redo());
history.clear();
assert!(!history.can_undo());
assert!(!history.can_redo());
}
#[test]
fn preview_tracker_keeps_first_snapshot_until_end() {
let mut tracker = PreviewTracker::new();
assert!(!tracker.is_active());
assert_eq!(tracker.end(), None);
tracker.begin(&seconds(VIDEO_SECONDS));
tracker.begin(&seconds(1.0));
assert!(tracker.is_active());
assert_eq!(tracker.snapshot(), Some(&seconds(VIDEO_SECONDS)));
assert_eq!(tracker.end(), Some(seconds(VIDEO_SECONDS)));
assert!(!tracker.is_active());
assert_eq!(tracker.snapshot(), None);
}
|
