should be it

external/duckdb/tools/swift/duckdb-swift/Tests/DuckDBTests/ExtensionTests.swift

@@ -0,0 +1,60 @@
+//
+//  DuckDB
+//  https://github.com/duckdb/duckdb-swift
+//
+//  Copyright © 2018-2024 Stichting DuckDB Foundation
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to
+//  deal in the Software without restriction, including without limitation the
+//  rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+//  sell copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+//  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+//  IN THE SOFTWARE.
+
+
+import Foundation
+import XCTest
+@testable import DuckDB
+
+final class ExtensionTests: XCTestCase {
+  func test_parquet() throws {
+    try loadExtension(extension_name: "parquet")
+  }
+  func test_json() throws {
+    try loadExtension(extension_name: "json")
+  }
+  func test_icu() throws {
+    try loadExtension(extension_name: "icu")
+  }
+}
+
+private extension ExtensionTests {
+  func loadExtension(extension_name: String) throws {
+    let connection = try Database(store: .inMemory).connect()
+
+    try connection.execute("LOAD \(extension_name)")
+
+    let prepped = try PreparedStatement(
+        connection: connection,
+        query: "SELECT installed, loaded FROM duckdb_extensions() where extension_name = $1"
+    )
+
+    try prepped.bind(extension_name, at: 1);
+
+    let result = try prepped.execute()
+
+    XCTAssertEqual(result[0].cast(to: Bool.self)[0], true)
+    XCTAssertEqual(result[1].cast(to: Bool.self)[0], true)
+  }
+}