EnvironmentInjection crashes under certain conditions

[shuufei]

When I run the test under certain conditions, it crashes on EnvironmentInjection in ViewInspector.

I can't identify the conditions that cause the crash because I just changed some code that I don't think is the cause of the crash and I can see the result of whether it crashes or not.

Also, the result does not change with each execution, but always crashes under certain conditions.

Environment

• XCode: 15.4
• ViewInspector: 0.10.0
• Run Destination: Simulator iPhone 15 (17.5)

Crash Details

EXC_BAD_ACCESS is occurring at line 47 of EnvironmentInjection.

Crashing Code

View under test↓

import SwiftUI

@MainActor
class ViewModel: ObservableObject {
    @Published var count: Int = 0
}

struct ContentView: View {
    @State var model: ModelA?
    
    @EnvironmentObject var viewModel: ViewModel
    
    #if DEBUG
    internal var didAppear: ((Self) -> Void)?
    #endif

    var body: some View {
        VStack {
            Text("Count: \(viewModel.count)")
            Button {
                viewModel.count += 1
            } label: {
                Text("increment")
            }
            Button {
                viewModel.count -= 1
            } label: {
                Text("decrement")
            }
        }
        .padding()
        .onAppear {
            #if DEBUG
            self.didAppear?(self)
            #endif
        }
    }
}

struct ModelA: Codable {
    let id: String
    var property1: String
    let property2: String
    var property3: String
    let property4: String
    let property5: String
    let property6: String
    var property7: [String]
    let property8: Date
    let property9: Date?
    var property10: Double?
    var property11: ModelB?
    var property12: Status

    struct ModelB: Codable, Hashable {
        let id: String
        var property1: [String]
    }

    enum Status: String, Codable {
        case ready = "READY"
        case running = "RUNNING"
    }
}

Test code↓

import XCTest
import ViewInspector
@testable import ViewInspectorSample

final class ViewInspectorSampleTests: XCTestCase {
    override func setUpWithError() throws {
        // Put setup code here. This method is called before the invocation of each test method in the class.
    }

    override func tearDownWithError() throws {
        // Put teardown code here. This method is called after the invocation of each test method in the class.
    }
    
    @MainActor
    func testCounter() throws {
        var sut = ContentView()
        
        let exp = sut.on(\.didAppear) { view in
            let countText = try view.vStack().text(0).string()
            XCTAssertEqual(countText, "Count: 0")
            try view.find(button: "increment").tap()
            let updatedText = try view.find(ViewType.Text.self).string()
            XCTAssertEqual(updatedText, "Count: 1")
        }
        ViewHosting.host(view: sut.environmentObject(ViewModel()))
        wait(for: [exp], timeout: 0.1)
    }
}

If I set Run Destination to Simulator iPhone 14 (16.0), the crash does not occur.

No Crash Code

Fixed the value type ModelA defined in @State.
Just commented out one property.
The value defined in @State is not used anywhere in the View.

With this code, the test succeeds without crashing.
No change in test code.

import SwiftUI

@MainActor
class ViewModel: ObservableObject {
    @Published var count: Int = 0
}

struct ContentView: View {
    @State var model: ModelA?
    
    @EnvironmentObject var viewModel: ViewModel
    
    #if DEBUG
    internal var didAppear: ((Self) -> Void)?
    #endif

    var body: some View {
        VStack {
            Text("Count: \(viewModel.count)")
            Button {
                viewModel.count += 1
            } label: {
                Text("increment")
            }
            Button {
                viewModel.count -= 1
            } label: {
                Text("decrement")
            }
        }
        .padding()
        .onAppear {
            #if DEBUG
            self.didAppear?(self)
            #endif
        }
    }
}

struct ModelA: Codable {
    let id: String
    var property1: String
    let property2: String
    var property3: String
    let property4: String
    let property5: String
    let property6: String
    var property7: [String]
//    let property8: Date  <--------------- comment out
    let property9: Date?
    var property10: Double?
    var property11: ModelB?
    var property12: Status

    struct ModelB: Codable, Hashable {
        let id: String
        var property1: [String]
    }

    enum Status: String, Codable {
        case ready = "READY"
        case running = "RUNNING"
    }
}

Not only property8, but removing other properties from ModelA or changing the type definition will no longer cause crashes.

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We are strongly considering adopting ViewInspector for our project.
I wish you the best of luck in resolving this issue. Best regards.