[RP1][iOS] Expose PayPal and Venmo App Installed for Merchants

Sources/BraintreePayPal/BTPayPalClient.swift

@@ -184,6 +184,18 @@ import BraintreeDataCollector
         }
     }
 
+    /// Indicates whether the PayPal App is installed.
+    /// - Warning: This module is in beta. It's public API may change or be removed in future releases.
+    public func isPayPalAppInstalled() -> Bool {
+        application.isPayPalAppInstalled()
+    }
+
+    /// Indicates whether the Venmo App is installed.
+    /// - Warning: This module is in beta. It's public API may change or be removed in future releases.
+    public func isVenmoAppInstalled() -> Bool {
+        application.isVenmoAppInstalled()
+    }
+
     // MARK: - Internal Methods
 
     func handleReturn(

UnitTests/BraintreePayPalTests/BTPayPalClient_Tests.swift

@@ -1028,4 +1028,34 @@ class BTPayPalClient_Tests: XCTestCase {
 
         XCTAssertFalse(mockAPIClient.postedIsVaultRequest)
     }
+
+    func test_payPalAppNotInstalled() {
+        let fakeApplication = FakeApplication()
+        payPalClient.application = fakeApplication
+        fakeApplication.cannedCanOpenURL = false
+
+        XCTAssertEqual(fakeApplication.isPayPalAppInstalled(), payPalClient.application.isPayPalAppInstalled())
+    }
+
+    func test_payPalAppInstalled() {
+        let fakeApplication = FakeApplication()
+        payPalClient.application = fakeApplication
+
+        XCTAssertEqual(fakeApplication.isPayPalAppInstalled(), payPalClient.application.isPayPalAppInstalled())
+    }
+
+    func test_venmoAppNotInstalled() {
+        let fakeApplication = FakeApplication()
+        payPalClient.application = fakeApplication
+        fakeApplication.cannedCanOpenURL = false
+
+        XCTAssertEqual(fakeApplication.isVenmoAppInstalled(), payPalClient.application.isVenmoAppInstalled())
+    }
+
+    func test_venmoAppInstalled() {
+        let fakeApplication = FakeApplication()
+        payPalClient.application = fakeApplication
+
+        XCTAssertEqual(fakeApplication.isVenmoAppInstalled(), payPalClient.application.isVenmoAppInstalled())
+    }
 }