feat: session is active (#962)

* Add checkout session active

* Reset checkoutSessionId when Headless cleans up

* add test for headless cleanup

Sources/PrimerSDK/Classes/Core/Primer/Primer.swift

@@ -109,4 +109,11 @@ public class Primer {
     public func dismiss() {
         PrimerInternal.shared.dismiss()
     }
+
+    /**
+     Checkout Session is active?
+     */
+    public func checkoutSessionIsActive() -> Bool {
+        PrimerInternal.shared.checkoutSessionIsActive()
+    }
 }

Sources/PrimerSDK/Classes/Core/Primer/PrimerInternal.swift

@@ -276,4 +276,8 @@ internal class PrimerInternal: LogReporter {
             }
         }
     }
+
+    internal func checkoutSessionIsActive() -> Bool {
+        checkoutSessionId != nil
+    }
 }

Sources/PrimerSDK/Classes/Core/PrimerHeadlessUniversalCheckout/PrimerHeadlessUniversalCheckout.swift

@@ -132,6 +132,7 @@ public class PrimerHeadlessUniversalCheckout: LogReporter {
 
     public func cleanUp() {
         PrimerAPIConfigurationModule.resetSession()
+        PrimerInternal.shared.checkoutSessionId = nil
     }
 
     // MARK: - HELPERS

Tests/Primer/Utils/CheckoutSessionTests.swift

@@ -0,0 +1,26 @@
+//
+//  File.swift
+//  
+//
+//  Created by Niall Quinn on 06/08/24.
+//
+
+import XCTest
+@testable import PrimerSDK
+
+final class CheckoutSessionTests: XCTestCase {
+    func test_headless_cleanup() {
+        XCTAssertFalse(Primer.shared.checkoutSessionIsActive())
+
+        let expectation = self.expectation(description: "Wait for headless load")
+
+        PrimerHeadlessUniversalCheckout.current.start(withClientToken: "") { paymentMethods, err in
+            XCTAssertTrue(Primer.shared.checkoutSessionIsActive())
+            expectation.fulfill()
+        }
+
+        waitForExpectations(timeout: 30)
+        PrimerHeadlessUniversalCheckout.current.cleanUp()
+        XCTAssertFalse(Primer.shared.checkoutSessionIsActive())
+    }
+}