import XCTest
@testable import ClipBored

final class DiagnosticsServiceTests: XCTestCase {
  func testCountersCanBeIncrementedAndReset() {
    let diagnostics = DiagnosticsService.shared
    diagnostics.reset()

    diagnostics.incrementMonitorTick()
    diagnostics.incrementPasteboardChange()
    diagnostics.incrementExtractionAttempt()
    diagnostics.incrementDatabaseMutation()
    diagnostics.incrementCachePurge()

    // The snapshot read synchronizes with the serial diagnostics queue.
    let snapshot = diagnostics.currentSnapshot()
    XCTAssertEqual(snapshot.monitorTicks, 1)
    XCTAssertEqual(snapshot.pasteboardChanges, 1)
    XCTAssertEqual(snapshot.extractionAttempts, 1)
    XCTAssertEqual(snapshot.databaseMutations, 1)
    XCTAssertEqual(snapshot.cachePurges, 1)

    diagnostics.reset()
    XCTAssertEqual(diagnostics.currentSnapshot(), .init(monitorTicks: 0, pasteboardChanges: 0, extractionAttempts: 0, databaseMutations: 0, cachePurges: 0))
  }
}