UserDefaults does not appear to function in an XCTest when running on Linux. I'm running the below test but userDefaults.string(forKey: "key") returns nil on Linux when on macOS it returns the correct value and passes.
I'm using Docker to execute the tests on Linux. My Dockerfile is as follows:
FROM swiftdocker/swift
WORKDIR /package
COPY . ./
RUN swift package resolve
RUN swift package clean
RUN swift test --parallel
The test file:
import XCTest
class UserDefaultsTests: XCTestCase {
func testUserDefaults() {
let userDefaults = UserDefaults.standard
userDefaults.set("value", forKey: "key")
_ = userDefaults.synchronize()
XCTAssertEqual(userDefaults.string(forKey: "key"), "value") //nil is not equal to "value"
}
static var allTests = [
("testUserDefaults", testUserDefaults)
]
}
UserDefaults appears to be implemented in Swift Core Libs here, which is available on Linux, so I'm not sure why it wouldn't work.
