Add unit tests to test reading from server-side flags

Summary: Since we already have a bunch of test cases covering this case, this diff simply added a few cases for checking server-side values.

Differential Revision: D51152076

fbshipit-source-id: be70fcab3f2bb5c11deb0146d743dcfa262533af

FBSDKCoreKit/FBSDKCoreKitTests/SettingsTests.swift

@@ -1066,6 +1066,82 @@ final class SettingsTests: XCTestCase {
     )
   }
 
+  func testAutoLogAppEventsEnabledFromServer_1() {
+    // set true for the server-side overriden value
+    let migratedAutoLogValues = ["auto_log_app_events_enabled": NSNumber(true)]
+    serverConfigurationProvider.configs = ["migratedAutoLogValues": migratedAutoLogValues]
+    // set false in info.plist
+    bundle = TestBundle(infoDictionary: ["FacebookAutoLogAppEventsEnabled": false])
+    configureSettings()
+    XCTAssertTrue(
+      settings.isAutoLogAppEventsEnabled,
+      "Should favor the server-side overriden value over others"
+    )
+  }
+
+  func testAutoLogAppEventsEnabledFromServer_2() {
+    // set true for the server-side overriden value
+    let migratedAutoLogValues = ["auto_log_app_events_enabled": String("Some_Value")]
+    serverConfigurationProvider.configs = ["migratedAutoLogValues": migratedAutoLogValues]
+    configureSettings()
+    settings.isAutoLogAppEventsEnabled = true
+    XCTAssertTrue(
+      settings.isAutoLogAppEventsEnabled,
+      "Should favor the client-side value when type casting fails"
+    )
+  }
+
+  func testAutoLogAppEventsEnabledFromServerDefault() {
+    // set false for the server-side default value
+    let migratedAutoLogValues = ["auto_log_app_events_default": NSNumber(false)]
+    serverConfigurationProvider.configs = ["migratedAutoLogValues": migratedAutoLogValues]
+    configureSettings()
+    XCTAssertFalse(
+      settings.isAutoLogAppEventsEnabled,
+      "Should favor the server-side default value if there are no other values set"
+    )
+  }
+
+  func testAutoLogAppEventsEnabledFromLocal_1() {
+    // set true for the server-side default value
+    let migratedAutoLogValues = ["auto_log_app_events_default": NSNumber(true)]
+    serverConfigurationProvider.configs = ["migratedAutoLogValues": migratedAutoLogValues]
+    // set false in info.plist
+    bundle = TestBundle(infoDictionary: ["FacebookAutoLogAppEventsEnabled": false])
+    configureSettings()
+    XCTAssertFalse(
+      settings.isAutoLogAppEventsEnabled,
+      "Should favor the value in info.plist over the server-side default value"
+    )
+  }
+
+  func testAutoLogAppEventsEnabledFromLocal_2() {
+    // set true for the server-side overriden value
+    let migratedAutoLogValues = ["auto_log_app_events_default": NSNumber(true)]
+    serverConfigurationProvider.configs = ["migratedAutoLogValues": migratedAutoLogValues]
+    // set false in memory store
+    configureSettings()
+    settings.isAutoLogAppEventsEnabled = false
+    configureSettings()
+    XCTAssertFalse(
+      settings.isAutoLogAppEventsEnabled,
+      "Should favor the value in memory over the server-side default value"
+    )
+  }
+
+  func testAutoLogAppEventsEnabledFromLocal_3() {
+    // Set an empty dictionary for the server-side value
+    // Technically, this should not happen in production environment
+    serverConfigurationProvider.configs = ["migratedAutoLogValues": [:]]
+    // set false in user default
+    configureSettings()
+    settings.dataStore?.fb_setObject(false, forKey: "FacebookAutoLogAppEventsEnabled")
+    XCTAssertFalse(
+      settings.isAutoLogAppEventsEnabled,
+      "Should favor the value in user default over the server-side default value"
+    )
+  }
+
   // MARK: - Advertiser Identifier Collection Enabled
 
   func testFacebookAdvertiserIDCollectionEnabled() {