todos/UnitTests/Tests/Enumerations/TodoGroupTests.swift

import Foundation
import SwiftUI
import Testing

@testable import Todos

@Suite("TodoGroup enumeration tests")
struct TodoGroupTests {

    // MARK: Computed tests

    @Test(
        "canShowCompleted returns correct values",
        arguments: zip(
            TodoGroup.allCases,
            [true, true, true, false]
        )
    )
    func canShowCompleted(
        for group: TodoGroup,
        expects expectation: Bool
    ) {
        // GIVEN
        // WHEN
        let canShowCompleted = group.canShowCompleted

        // THEN
        #expect(canShowCompleted == expectation)
    }

    @Test(
        "group color match expected values",
        arguments: zip(
            TodoGroup.allCases,
            [Color.blue, .green, .red, .gray]
        )
    )
    func color(
        for group: TodoGroup,
        expects expectation: Color
    ) {
        // GIVEN
        // WHEN
        let color = group.color

        // THEN
        #expect(color == expectation)
    }

    @Test(
        "group icon names match expected values",
        arguments: zip(
            TodoGroup.allCases,
            ["calendar.badge.clock", "calendar", "calendar.badge.exclamationmark", "checkmark.circle.fill"]
        )
    )
    func iconName(
        for group: TodoGroup,
        expects expectation: String
    ) {
        // GIVEN
        // WHEN
        let iconName = group.iconName

        // THEN
        #expect(iconName == expectation)
    }

    @Test(
        "group titles match expected values",
        arguments: zip(
            TodoGroup.allCases,
            ["today", "upcoming", "overdue", "completed"]
        )
    )
    func title(
        for group: TodoGroup,
        expects expectation: String
    ) {
        // GIVEN
        let key = "enumeration.todo-group.title." + expectation

        // WHEN
        let title = group.title

        // THEN
        #expect(title == .init(key))
    }

    // MARK: Case Iteration Tests

    @Test("all cases contains all cases, in correct order")
    func allCases() {
        // GIVEN
        // WHEN
        let allCases = TodoGroup.allCases

        // THEN
        #expect(allCases.count == 4)
        #expect(allCases[0] == .today)
        #expect(allCases[1] == .upcoming)
        #expect(allCases[2] == .overdue)
        #expect(allCases[3] == .completed)
    }

    // MARK: Identifiable Tests

    @Test("id returns an identity of a case", arguments: TodoGroup.allCases)
    func id(for group: TodoGroup) {
        // GIVEN
        // WHEN
        let id = group.id

        // THEN
        #expect(id == group)
    }

}