//
//  ToastCenterTests.swift
//  suixinkanTests
//
//  Created by Codex on 2026/6/23.
//

import XCTest
@testable import suixinkan

@MainActor
/// 全局 Toast 状态中心测试，覆盖自动隐藏和连续展示行为。
final class ToastCenterTests: XCTestCase {
    /// 测试 show 会立即写入当前 Toast 文案。
    func testShowStoresMessage() {
        let center = ToastCenter(autoDismissNanoseconds: 100_000_000)

        center.show("保存成功")

        XCTAssertEqual(center.snapshotForTests, ToastSnapshot(message: "保存成功"))
    }

    /// 测试 Toast 到达自动隐藏时间后会清空文案。
    func testToastAutoDismissesAfterDelay() async throws {
        let center = ToastCenter(autoDismissNanoseconds: 60_000_000)

        center.show("保存成功")
        try await Task.sleep(nanoseconds: 90_000_000)

        XCTAssertEqual(center.snapshotForTests, ToastSnapshot(message: nil))
    }

    /// 测试连续 show 会覆盖旧文案，并重新计算自动隐藏时间。
    func testRepeatedShowResetsAutoDismissTimer() async throws {
        let center = ToastCenter(autoDismissNanoseconds: 100_000_000)

        center.show("第一条")
        try await Task.sleep(nanoseconds: 70_000_000)
        center.show("第二条")
        try await Task.sleep(nanoseconds: 60_000_000)

        XCTAssertEqual(center.snapshotForTests, ToastSnapshot(message: "第二条"))

        try await Task.sleep(nanoseconds: 70_000_000)
        XCTAssertEqual(center.snapshotForTests, ToastSnapshot(message: nil))
    }

    /// 测试手动 dismiss 会立即清空文案，并取消当前自动隐藏任务。
    func testDismissClearsMessageImmediately() async throws {
        let center = ToastCenter(autoDismissNanoseconds: 100_000_000)

        center.show("保存成功")
        center.dismiss()

        XCTAssertEqual(center.snapshotForTests, ToastSnapshot(message: nil))

        try await Task.sleep(nanoseconds: 130_000_000)
        XCTAssertEqual(center.snapshotForTests, ToastSnapshot(message: nil))
    }
}