Better API, test

Author: jberkel

Sources/SQLite/Schema/SchemaChanger.swift

@@ -224,8 +224,9 @@ public class SchemaChanger: CustomStringConvertible {
     }
 
     // Runs arbitrary SQL. Should only be used if no predefined operations exist.
-    public func run(sql: String) throws {
-        try connection.run(sql)
+    @discardableResult
+    public func run(_ sql: String, _ bindings: Binding?...) throws -> Statement {
+        return try connection.run(sql, bindings)
     }
 
     private func run(table: String, operation: Operation) throws {

Tests/SQLiteTests/Schema/SchemaChangerTests.swift

@@ -375,4 +375,9 @@ class SchemaChangerTests: SQLiteTestCase {
                              references: .init(fromColumn: "foo_id", toTable: "foo", toColumn: "id", onUpdate: nil, onDelete: nil))
         ], barColumns)
     }
+
+    func test_run_arbitrary_sql() throws {
+        try schemaChanger.run("DROP TABLE users")
+        XCTAssertEqual(0, try schema.objectDefinitions(name: "users", type: .table).count)
+    }
 }