自作したiOS向けOSSライブラリのテスト設定をする

import XCTest
@testable import HasuoProgressSpinner

final class HasuoProgressSpinnerTests: XCTestCase {
    func testExample() throws {
        // This is an example of a functional test case.
        // Use XCTAssert and related functions to verify your tests produce the correct
        // results.
        XCTAssertEqual(HasuoProgressSpinner().text, "Hello, World!")
    }
}

/* 例えば以下のような変数にはテストであってもアクセスすることはできません */
private var text = "Hello, World"

import PackageDescription

let package = Package(
    name: "HasuoProgressSpinner",
    products: [
        // Products define the executables and libraries a package produces, and make them visible to other packages.
        .library(
            name: "HasuoProgressSpinner",
            targets: ["HasuoProgressSpinner"]),
    ],
    dependencies: [
        // Dependencies declare other packages that this package depends on.
        // .package(url: /* package url */, from: "1.0.0"),
    ],
    targets: [
        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
        // Targets can depend on other targets in this package, and on products in packages this package depends on.
        .target(
            name: "HasuoProgressSpinner",
            dependencies: []),
        .testTarget(
            name: "HasuoProgressSpinnerTests",
            dependencies: ["HasuoProgressSpinner"]),
    ]
)