import Testing
@testable import SstCore

struct ModifierKeyTrackerTests {
    @Test func emitsPressedThenReleasedOnlyOnTransitions() {
        var tracker = ModifierKeyTracker()
        #expect(tracker.process(isDown: false) == nil)
        #expect(tracker.process(isDown: true) == .pressed)
        #expect(tracker.process(isDown: true) == nil)
        #expect(tracker.process(isDown: false) == .released)
        #expect(tracker.process(isDown: false) == nil)
    }

    @Test func freshTrackerStartsReleased() {
        var tracker = ModifierKeyTracker()
        #expect(tracker.process(isDown: true) == .pressed)
    }
}