Trying to implement Unit Tests for @Binding properties in a ViewModel
BindingTester
Trying to implement Unit Tests for @Binding properties in a ViewModel
ViewModel to be tested
class SheetViewModel: ObservableObject {
@Binding var isPresented: Bool
func onClose() {
isPresented = false // To be unit tested
}
init(isPresented: Binding<Bool>) {
_isPresented = isPresented
Unit tests try out – not working
func test1() {
let viewModel = SheetViewModel(isPresented: .constant(true))
XCTAssertTrue(viewModel.isPresented)
viewModel.onClose()
XCTAssertFalse(viewModel.isPresented)
}
func test2() {
@State var isSheetDisplayed: Bool = true
let viewModel = SheetViewModel(isPresented: $isSheetDisplayed) // Accessing State's value outside of being installed on a View.
XCTAssertTrue(viewModel.isPresented)
viewModel.onClose()
XCTAssertFalse(viewModel.isPresented)
}
func test3() {
let isSheetDisplayed: Binding<Bool> = .constant(true)
let viewModel = SheetViewModel(isPresented: isSheetDisplayed)
XCTAssertTrue(viewModel.isPresented)
viewModel.onClose()
XCTAssertFalse(viewModel.isPresented)
}