Implement async event streaming

Tests/InotifyIntegrationTests/Utilities/createFile.swift

@@ -0,0 +1,3 @@
+func createFile(at path: String, contents: String = "") throws {
+	try contents.write(toFile: path, atomically: false, encoding: .utf8)
+}

Tests/InotifyIntegrationTests/Utilities/getEventsForTrigger.swift

@@ -0,0 +1,25 @@
+import Inotify
+
+func getEventsForTrigger(
+	in dir: String,
+	mask: InotifyEventMask,
+	trigger: @escaping (String) async throws -> Void
+) async throws -> [InotifyEvent] {
+	let watcher = try Inotify()
+	try await watcher.addWatch(path: dir, mask: mask)
+
+	let eventTask = Task {
+		var events: [InotifyEvent] = []
+		for await event in await watcher.events {
+			events.append(event)
+		}
+		return events
+	}
+
+	try await Task.sleep(for: .milliseconds(200))
+	try await trigger(dir)
+	try await Task.sleep(for: .milliseconds(200))
+
+	eventTask.cancel()
+	return await eventTask.value
+}

Tests/InotifyIntegrationTests/Utilities/withTempDir.swift

@@ -0,0 +1,10 @@
+import Foundation
+
+func withTempDir(_ body: (String) async throws -> Void) async throws {
+	let dir = FileManager.default.temporaryDirectory
+		.appendingPathComponent("InotifyIntegrationTests-\(UUID().uuidString)")
+		.path
+	try FileManager.default.createDirectory(atPath: dir, withIntermediateDirectories: true)
+	defer { try? FileManager.default.removeItem(atPath: dir) }
+	try await body(dir)
+}