IsSqlServer etc migrationBuilder extensions

src/EFCore.SqlServer/Extensions/SqlServerMigrationBuilderExtensions.cs

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+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Reflection;
+using JetBrains.Annotations;
+using Microsoft.EntityFrameworkCore.SqlServer.Infrastructure.Internal;
+
+// ReSharper disable once CheckNamespace
+namespace Microsoft.EntityFrameworkCore.Migrations
+{
+    /// <summary>
+    ///     SQL Server specific extension methods for <see cref="MigrationBuilder" />.
+    /// </summary>
+    public static class SqlServerMigrationBuilderExtensions
+    {
+        /// <summary>
+        ///     <para>
+        ///         Returns true if the database provider currently in use is the SQL Server provider.
+        ///     </para>
+        /// </summary>
+        /// <param name="migrationBuilder"> The migrationBuilder from the parameters on <see cref="Migration.Up(MigrationBuilder)" /> or <see cref="Migration.Down(MigrationBuilder)" />. </param>
+        /// <returns> True if SQL Server is being used; false otherwise. </returns>
+        public static bool IsSqlServer([NotNull] this MigrationBuilder migrationBuilder)
+            => string.Equals(migrationBuilder.ActiveProvider,
+                typeof(SqlServerOptionsExtension).GetTypeInfo().Assembly.GetName().Name,
+                StringComparison.Ordinal);
+    }
+}

src/EFCore.Sqlite.Core/Extensions/SqliteMigrationBuilderExtensions.cs

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+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Reflection;
+using JetBrains.Annotations;
+using Microsoft.EntityFrameworkCore.Sqlite.Infrastructure.Internal;
+
+// ReSharper disable once CheckNamespace
+namespace Microsoft.EntityFrameworkCore.Migrations
+{
+    /// <summary>
+    ///     SQLite specific extension methods for <see cref="MigrationBuilder" />.
+    /// </summary>
+    public static class SqliteMigrationBuilderExtensions
+    {
+        /// <summary>
+        ///     <para>
+        ///         Returns true if the database provider currently in use is the SQLite provider.
+        ///     </para>
+        /// </summary>
+        /// <param name="migrationBuilder"> The migrationBuilder from the parameters on <see cref="Migration.Up(MigrationBuilder)" /> or <see cref="Migration.Down(MigrationBuilder)" />. </param>
+        /// <returns> True if SQLite is being used; false otherwise. </returns>
+        public static bool IsSqlite([NotNull] this MigrationBuilder migrationBuilder)
+            => string.Equals(migrationBuilder.ActiveProvider,
+                typeof(SqliteOptionsExtension).GetTypeInfo().Assembly.GetName().Name,
+                StringComparison.Ordinal);
+    }
+}

test/EFCore.SqlServer.Tests/SqlServerMigrationBuilderTest.cs

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+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using Microsoft.EntityFrameworkCore.Diagnostics;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Xunit;
+
+namespace Microsoft.EntityFrameworkCore.SqlServer.Tests
+{
+    public class SqlServerMigrationBuilderTest
+    {
+        [Fact]
+        public void IsSqlServer_when_using_SqlServer()
+        {
+            var migrationBuilder = new MigrationBuilder("Microsoft.EntityFrameworkCore.SqlServer");
+            Assert.True(migrationBuilder.IsSqlServer());
+        }
+
+        [Fact]
+        public void Not_IsSqlServer_when_using_different_provider()
+        {
+            var migrationBuilder = new MigrationBuilder("Microsoft.EntityFrameworkCore.InMemory");
+            Assert.False(migrationBuilder.IsSqlServer());
+        }
+
+    }
+}

test/EFCore.Sqlite.Tests/SqliteMigrationBuilderTest.cs

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+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using Microsoft.EntityFrameworkCore.Diagnostics;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Xunit;
+
+namespace Microsoft.EntityFrameworkCore
+{
+    public class SqliteMigrationBuilderTest
+    {
+        [Fact]
+        public void IsSqlite_when_using_Sqlite()
+        {
+            var migrationBuilder = new MigrationBuilder("Microsoft.EntityFrameworkCore.Sqlite");
+            Assert.True(migrationBuilder.IsSqlite());
+        }
+
+        [Fact]
+        public void Not_IsSqlite_when_using_different_provider()
+        {
+            var migrationBuilder = new MigrationBuilder("Microsoft.EntityFrameworkCore.InMemory");
+            Assert.False(migrationBuilder.IsSqlite());
+        }
+
+    }
+}