unit tests

Implementation/PeeredTests/NoteInvitationTests.swift

@@ -0,0 +1,88 @@
+import MultipeerConnectivity
+import Testing
+
+@testable import Peered
+
+extension NoteInvitation {
+  fileprivate init(handler: @escaping (Bool) -> Void) {
+    self.init(
+      invitatorID: .init(
+        displayName: "host"
+      ),
+      note: .init(title: "Shared note", noteSnapshot: "Snapshot"),
+      invitationHandler: handler
+    )
+  }
+}
+
+@Suite
+struct NoteInvitationTests {
+  @Test
+  func acceptCallsHandlerWithTrue() {
+    var received: Bool? = nil
+    var invitation = NoteInvitation { received = $0 }
+
+    invitation.accept()
+
+    #expect(received == true)
+  }
+
+  @Test
+  func declineCallsHandlerWithFalse() {
+    var received: Bool? = nil
+    var invitation = NoteInvitation { received = $0 }
+
+    invitation.decline()
+
+    #expect(received == false)
+  }
+
+  @Test
+  func acceptIsIdempotent() {
+    var callCount = 0
+    var invitation = NoteInvitation { _ in callCount += 1 }
+
+    invitation.accept()
+    invitation.accept()
+
+    #expect(callCount == 1)
+  }
+
+  @Test
+  func declineIsIdempotent() {
+    var callCount = 0
+    var invitation = NoteInvitation { _ in callCount += 1 }
+
+    invitation.decline()
+    invitation.decline()
+
+    #expect(callCount == 1)
+  }
+
+  @Test
+  func declineAfterAcceptIsNoOp() {
+    var callCount = 0
+    var invitation = NoteInvitation { _ in callCount += 1 }
+
+    invitation.accept()
+    invitation.decline()
+
+    #expect(callCount == 1)
+  }
+
+  @Test
+  func noteNameReturnsTitle() {
+    let invitation = NoteInvitation { _ in }
+    #expect(invitation.noteName == "Shared note")
+  }
+
+  @Test
+  func idIsInvitatorPeerID() {
+    let peerID = MCPeerID(displayName: "host")
+    let invitation = NoteInvitation(
+      invitatorID: peerID,
+      note: .init(title: "T", noteSnapshot: "S")
+    )
+    #expect(invitation.id == peerID)
+  }
+}