add swiftUI code

2025-01-22 14:09:10 +08:00
parent 68e7b7347c
commit 8a99853829
2531 changed files with 486215 additions and 0 deletions
@@ -0,0 +1,64 @@
+import GRDB
+
+class DatabasePoolBackupTests: BackupTestCase {
+    
+    func testDatabaseWriterBackup() throws {
+        // SQLCipher can't backup encrypted databases: use a pristine Configuration
+        let source = try makeDatabasePool(filename: "source.sqlite", configuration: Configuration())
+        let destination = try makeDatabasePool(filename: "destination.sqlite", configuration: Configuration())
+        try testDatabaseWriterBackup(from: source, to: destination)
+    }
+    
+    func testDatabaseBackup() throws {
+        let source = try makeDatabasePool(filename: "source.sqlite", configuration: Configuration())
+        let destination = try makeDatabasePool(filename: "destination.sqlite", configuration: Configuration())
+        try testDatabaseBackup(from: source, to: destination)
+    }
+    
+    // TODO: fix flaky test
+//    func testConcurrentWriteDuringBackup() throws {
+//        let source = try makeDatabasePool(filename: "source.sqlite")
+//        let destination = try makeDatabasePool(filename: "destination.sqlite")
+//        
+//        try source.write { db in
+//            try db.execute(sql: "CREATE TABLE item (id INTEGER PRIMARY KEY)")
+//            try db.execute(sql: "INSERT INTO item (id) VALUES (NULL)")
+//            XCTAssertEqual(try Int.fetchOne(db, sql: "SELECT COUNT(*) FROM item")!, 1)
+//        }
+//        
+//        let s1 = DispatchSemaphore(value: 0)
+//        let s2 = DispatchSemaphore(value: 0)
+//        DispatchQueue.global().async {
+//            _ = s1.wait(timeout: .distantFuture)
+//            try! source.writeInTransaction(.immediate) { db in
+//                try db.execute(sql: "INSERT INTO item (id) VALUES (NULL)")
+//                s2.signal()
+//                return .commit
+//            }
+//        }
+//        
+//        try destination.writeWithoutTransaction { dbDestination in
+//            try source.backup(
+//                to: dbDestination,
+//                afterBackupInit: {
+//                    s1.signal()
+//                    _ = s2.wait(timeout: .distantFuture)
+//            },
+//                afterBackupStep: {
+//                    try! source.write { db in
+//                        try db.execute(sql: "INSERT INTO item (id) VALUES (NULL)")
+//                    }
+//            })
+//        }
+//        
+//        try source.read { db in
+//            XCTAssertEqual(try Int.fetchOne(db, sql: "SELECT COUNT(*) FROM item")!, 3)
+//        }
+//        try destination.read { db in
+//            // TODO: understand why the fix for https://github.com/groue/GRDB.swift/issues/102
+//            // had this value change from 2 to 1.
+//            // TODO: Worse, this test is fragile. I've seen not 1 but 2 once.
+//            XCTAssertEqual(try Int.fetchOne(db, sql: "SELECT COUNT(*) FROM item")!, 1)
+//        }
+//    }
+}