RUM-8416 Add auto-tracking option for SwiftUI in RUM Configuration

Author: mariedm

DatadogRUM/Sources/Feature/RUMFeature.swift

@@ -160,6 +160,7 @@ internal final class RUMFeature: DatadogRemoteFeature {
             featureScope: featureScope,
             uiKitRUMViewsPredicate: configuration.uiKitViewsPredicate,
             uiKitRUMActionsPredicate: configuration.uiKitActionsPredicate,
+            swiftUIRUMViewsPredicate: configuration.swiftUIViewsPredicate,
             longTaskThreshold: configuration.longTaskThreshold,
             appHangThreshold: configuration.appHangThreshold,
             mainQueue: configuration.mainQueue,

DatadogRUM/Sources/RUMConfiguration.swift

@@ -192,7 +192,7 @@ extension RUM {
         /// and do not make any assumptions on the thread used to run it.
         ///
         /// Note: This mapper ensures that all views are sent by preventing the return of `nil`. To drop certain automatically
-        /// collected RUM views, adjust the implementation of the view predicate (see the `uiKitViewsPredicate` and `swiftUIPredicate` options).
+        /// collected RUM views, adjust the implementations of the view predicates (see the `uiKitViewsPredicate` and `swiftUIViewsPredicate` options).
         ///
         /// Default: `nil`.
         public var viewEventMapper: RUM.ViewEventMapper?

DatadogRUM/Tests/Instrumentation/RUMInstrumentationTests.swift

@@ -18,6 +18,7 @@ class RUMInstrumentationTests: XCTestCase {
             featureScope: NOPFeatureScope(),
             uiKitRUMViewsPredicate: UIKitRUMViewsPredicateMock(),
             uiKitRUMActionsPredicate: nil,
+            swiftUIRUMViewsPredicate: nil,
             longTaskThreshold: nil,
             appHangThreshold: .mockAny(),
             mainQueue: .main,
@@ -46,6 +47,7 @@ class RUMInstrumentationTests: XCTestCase {
             featureScope: NOPFeatureScope(),
             uiKitRUMViewsPredicate: nil,
             uiKitRUMActionsPredicate: UIKitRUMActionsPredicateMock(),
+            swiftUIRUMViewsPredicate: nil,
             longTaskThreshold: nil,
             appHangThreshold: .mockAny(),
             mainQueue: .main,
@@ -65,12 +67,42 @@ class RUMInstrumentationTests: XCTestCase {
         }
     }
 
+    func testWhenOnlySwiftUIViewsPredicateIsConfigured_itInstrumentsUIViewController() throws {
+        // When
+        let instrumentation = RUMInstrumentation(
+            featureScope: NOPFeatureScope(),
+            uiKitRUMViewsPredicate: nil,
+            uiKitRUMActionsPredicate: nil,
+            swiftUIRUMViewsPredicate: SwiftUIRUMViewsPredicateMock(),
+            longTaskThreshold: nil,
+            appHangThreshold: .mockAny(),
+            mainQueue: .main,
+            dateProvider: SystemDateProvider(),
+            backtraceReporter: BacktraceReporterMock(),
+            fatalErrorContext: FatalErrorContextNotifierMock(),
+            processID: .mockAny(),
+            notificationCenter: .default,
+            watchdogTermination: .mockRandom(),
+            memoryWarningMonitor: .mockRandom()
+        )
+
+        // Then
+        withExtendedLifetime(instrumentation) {
+            DDAssertActiveSwizzlings([
+                "viewDidAppear:",
+                "viewDidDisappear:",
+            ])
+            XCTAssertNil(instrumentation.longTasks)
+        }
+    }
+
     func testWhenOnlyLongTasksThresholdIsConfigured_itInstrumentsRunLoop() throws {
         // When
         let instrumentation = RUMInstrumentation(
             featureScope: NOPFeatureScope(),
             uiKitRUMViewsPredicate: nil,
             uiKitRUMActionsPredicate: nil,
+            swiftUIRUMViewsPredicate: nil,
             longTaskThreshold: 0.5,
             appHangThreshold: .mockAny(),
             mainQueue: .main,
@@ -99,6 +131,7 @@ class RUMInstrumentationTests: XCTestCase {
             featureScope: NOPFeatureScope(),
             uiKitRUMViewsPredicate: nil,
             uiKitRUMActionsPredicate: nil,
+            swiftUIRUMViewsPredicate: nil,
             longTaskThreshold: .mockRandom(min: -100, max: 0),
             appHangThreshold: .mockAny(),
             mainQueue: .main,
@@ -123,6 +156,7 @@ class RUMInstrumentationTests: XCTestCase {
             featureScope: NOPFeatureScope(),
             uiKitRUMViewsPredicate: nil,
             uiKitRUMActionsPredicate: nil,
+            swiftUIRUMViewsPredicate: nil,
             longTaskThreshold: .mockRandom(min: -100, max: 0),
             appHangThreshold: 2,
             mainQueue: .main,
@@ -147,6 +181,7 @@ class RUMInstrumentationTests: XCTestCase {
             featureScope: NOPFeatureScope(),
             uiKitRUMViewsPredicate: nil,
             uiKitRUMActionsPredicate: nil,
+            swiftUIRUMViewsPredicate: nil,
             longTaskThreshold: .mockRandom(min: -100, max: 0),
             appHangThreshold: nil,
             mainQueue: .main,
@@ -171,6 +206,7 @@ class RUMInstrumentationTests: XCTestCase {
             featureScope: NOPFeatureScope(),
             uiKitRUMViewsPredicate: UIKitRUMViewsPredicateMock(),
             uiKitRUMActionsPredicate: UIKitRUMActionsPredicateMock(),
+            swiftUIRUMViewsPredicate: nil,
             longTaskThreshold: 0.5,
             appHangThreshold: 2,
             mainQueue: .main,