diff --git a/src/Microsoft.AspNetCore.Razor.Evolution/DefaultItemCollection.cs b/src/Microsoft.AspNetCore.Razor.Evolution/DefaultItemCollection.cs
new file mode 100644
index 0000000000..93b9a5149a
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Razor.Evolution/DefaultItemCollection.cs
@@ -0,0 +1,43 @@
+// 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.Collections.Generic;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    internal class DefaultItemCollection : ItemCollection
+    {
+        private readonly Dictionary<object, object> _items;
+
+        public DefaultItemCollection()
+        {
+            _items = new Dictionary<object, object>();
+        }
+
+        public override object this[object key]
+        {
+            get
+            {
+                if (key == null)
+                {
+                    throw new ArgumentNullException(nameof(key));
+                }
+
+                object value;
+                _items.TryGetValue(key, out value);
+                return value;
+            }
+
+            set
+            {
+                if (key == null)
+                {
+                    throw new ArgumentNullException(nameof(key));
+                }
+
+                _items[key] = value;
+            }
+        }
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Razor.Evolution/DefaultRazorCodeDocument.cs b/src/Microsoft.AspNetCore.Razor.Evolution/DefaultRazorCodeDocument.cs
new file mode 100644
index 0000000000..e29fc84d40
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Razor.Evolution/DefaultRazorCodeDocument.cs
@@ -0,0 +1,26 @@
+// 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;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    internal class DefaultRazorCodeDocument : RazorCodeDocument
+    {
+        public DefaultRazorCodeDocument(RazorSourceDocument source)
+        {
+            if (source == null)
+            {
+                throw new ArgumentNullException(nameof(source));
+            }
+
+            Source = source;
+
+            Items = new DefaultItemCollection();
+        }
+
+        public override ItemCollection Items { get; }
+
+        public override RazorSourceDocument Source { get; }
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Razor.Evolution/DefaultRazorEngine.cs b/src/Microsoft.AspNetCore.Razor.Evolution/DefaultRazorEngine.cs
new file mode 100644
index 0000000000..57020a7417
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Razor.Evolution/DefaultRazorEngine.cs
@@ -0,0 +1,55 @@
+// 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.Collections.Generic;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    internal class DefaultRazorEngine : RazorEngine
+    {
+        public DefaultRazorEngine(IRazorEngineFeature[] features, IRazorEnginePhase[] phases)
+        {
+            if (features == null)
+            {
+                throw new ArgumentNullException(nameof(features));
+            }
+
+            if (phases == null)
+            {
+                throw new ArgumentNullException(nameof(phases));
+            }
+
+            Features = features;
+            Phases = phases;
+
+            for (var i = 0; i < features.Length; i++)
+            {
+                features[i].Engine = this;
+            }
+
+            for (var i = 0; i < phases.Length; i++)
+            {
+                phases[i].Engine = this;
+            }
+        }
+
+        public override IReadOnlyList<IRazorEngineFeature> Features { get; }
+
+        public override IReadOnlyList<IRazorEnginePhase> Phases { get; }
+
+        public override void Process(RazorCodeDocument document)
+        {
+            if (document == null)
+            {
+                throw new ArgumentNullException(nameof(document));
+            }
+
+            for (var i = 0; i < Phases.Count; i++)
+            {
+                var phase = Phases[i];
+                phase.Execute(document);
+            }
+        }
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Razor.Evolution/DefaultRazorEngineBuilder.cs b/src/Microsoft.AspNetCore.Razor.Evolution/DefaultRazorEngineBuilder.cs
new file mode 100644
index 0000000000..d6c8515098
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Razor.Evolution/DefaultRazorEngineBuilder.cs
@@ -0,0 +1,31 @@
+// 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.Collections.Generic;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    internal class DefaultRazorEngineBuilder : IRazorEngineBuilder
+    {
+        public DefaultRazorEngineBuilder()
+        {
+            Features = new List<IRazorEngineFeature>();
+            Phases = new List<IRazorEnginePhase>();
+        }
+
+        public ICollection<IRazorEngineFeature> Features { get; }
+
+        public IList<IRazorEnginePhase> Phases { get; }
+
+        public RazorEngine Build()
+        {
+            var features = new IRazorEngineFeature[Features.Count];
+            Features.CopyTo(features, arrayIndex: 0);
+
+            var phases = new IRazorEnginePhase[Phases.Count];
+            Phases.CopyTo(phases, arrayIndex: 0);
+
+            return new DefaultRazorEngine(features, phases);
+        }
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Razor.Evolution/DefaultRazorSourceDocument.cs b/src/Microsoft.AspNetCore.Razor.Evolution/DefaultRazorSourceDocument.cs
new file mode 100644
index 0000000000..e28f76ae31
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Razor.Evolution/DefaultRazorSourceDocument.cs
@@ -0,0 +1,39 @@
+// 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.IO;
+using System.Text;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    internal class DefaultRazorSourceDocument : RazorSourceDocument
+    {
+        private MemoryStream _stream;
+
+        public DefaultRazorSourceDocument(MemoryStream stream, Encoding encoding, string filename)
+        {
+            if (stream == null)
+            {
+                throw new ArgumentNullException(nameof(stream));
+            }
+
+            _stream = stream;
+            Encoding = encoding;
+            Filename = filename;
+        }
+
+        public Encoding Encoding { get; }
+
+        public override string Filename { get; }
+
+        public override TextReader CreateReader()
+        {
+            var copy = new MemoryStream(_stream.ToArray());
+
+            return Encoding == null
+                ? new StreamReader(copy, detectEncodingFromByteOrderMarks: true)
+                : new StreamReader(copy, Encoding);
+        }
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Razor.Evolution/IRazorEngineBuilder.cs b/src/Microsoft.AspNetCore.Razor.Evolution/IRazorEngineBuilder.cs
new file mode 100644
index 0000000000..5f7848a753
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Razor.Evolution/IRazorEngineBuilder.cs
@@ -0,0 +1,16 @@
+// 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.Collections.Generic;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public interface IRazorEngineBuilder
+    {
+        ICollection<IRazorEngineFeature> Features { get; }
+
+        IList<IRazorEnginePhase> Phases { get; }
+
+        RazorEngine Build();
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Razor.Evolution/IRazorEngineFeature.cs b/src/Microsoft.AspNetCore.Razor.Evolution/IRazorEngineFeature.cs
new file mode 100644
index 0000000000..017a65723b
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Razor.Evolution/IRazorEngineFeature.cs
@@ -0,0 +1,10 @@
+// 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.
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public interface IRazorEngineFeature
+    {
+        RazorEngine Engine { get; set; }
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Razor.Evolution/IRazorEnginePhase.cs b/src/Microsoft.AspNetCore.Razor.Evolution/IRazorEnginePhase.cs
new file mode 100644
index 0000000000..08dd34ba62
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Razor.Evolution/IRazorEnginePhase.cs
@@ -0,0 +1,12 @@
+// 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.
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public interface IRazorEnginePhase
+    {
+        RazorEngine Engine { get; set; }
+
+        void Execute(RazorCodeDocument document);
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Razor.Evolution/ItemCollection.cs b/src/Microsoft.AspNetCore.Razor.Evolution/ItemCollection.cs
new file mode 100644
index 0000000000..3a7d0c261f
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Razor.Evolution/ItemCollection.cs
@@ -0,0 +1,10 @@
+// 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.
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public abstract class ItemCollection
+    {
+        public abstract object this[object key] { get; set; }
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Razor.Evolution/RazorCodeDocument.cs b/src/Microsoft.AspNetCore.Razor.Evolution/RazorCodeDocument.cs
new file mode 100644
index 0000000000..874af1992b
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Razor.Evolution/RazorCodeDocument.cs
@@ -0,0 +1,24 @@
+// 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;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public abstract class RazorCodeDocument
+    {
+        public static RazorCodeDocument Create(RazorSourceDocument source)
+        {
+            if (source == null)
+            {
+                throw new ArgumentNullException(nameof(source));
+            }
+
+            return new DefaultRazorCodeDocument(source);
+        }
+
+        public abstract ItemCollection Items { get; }
+
+        public abstract RazorSourceDocument Source { get; }
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Razor.Evolution/RazorEngine.cs b/src/Microsoft.AspNetCore.Razor.Evolution/RazorEngine.cs
new file mode 100644
index 0000000000..0f26c3e27f
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Razor.Evolution/RazorEngine.cs
@@ -0,0 +1,29 @@
+// 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.Collections.Generic;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public abstract class RazorEngine
+    {
+        public static RazorEngine Create()
+        {
+            return Create(configure: null);
+        }
+
+        public static RazorEngine Create(Action<IRazorEngineBuilder> configure)
+        {
+            var builder = new DefaultRazorEngineBuilder();
+            configure?.Invoke(builder);
+            return builder.Build();
+        }
+
+        public abstract IReadOnlyList<IRazorEngineFeature> Features { get; }
+
+        public abstract IReadOnlyList<IRazorEnginePhase> Phases { get; }
+
+        public abstract void Process(RazorCodeDocument document);
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Razor.Evolution/RazorSourceDocument.cs b/src/Microsoft.AspNetCore.Razor.Evolution/RazorSourceDocument.cs
new file mode 100644
index 0000000000..631a17f15f
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Razor.Evolution/RazorSourceDocument.cs
@@ -0,0 +1,49 @@
+// 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.IO;
+using System.Text;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public abstract class RazorSourceDocument
+    {
+        public static RazorSourceDocument ReadFrom(Stream stream, string filename)
+        {
+            if (stream == null)
+            {
+                throw new ArgumentNullException(nameof(stream));
+            }
+
+            return ReadFromInternal(stream, filename, encoding: null);
+        }
+
+        public static RazorSourceDocument ReadFrom(Stream stream, string filename, Encoding encoding)
+        {
+            if (stream == null)
+            {
+                throw new ArgumentNullException(nameof(stream));
+            }
+
+            if (encoding == null)
+            {
+                throw new ArgumentNullException(nameof(encoding));
+            }
+
+            return ReadFromInternal(stream, filename, encoding);
+        }
+
+        private static RazorSourceDocument ReadFromInternal(Stream stream, string filename, Encoding encoding)
+        {
+            var memoryStream = new MemoryStream();
+            stream.CopyTo(memoryStream);
+
+            return new DefaultRazorSourceDocument(memoryStream, encoding, filename);
+        }
+
+        public abstract string Filename { get; }
+
+        public abstract TextReader CreateReader();
+    }
+}
diff --git a/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultItemCollectionTest.cs b/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultItemCollectionTest.cs
new file mode 100644
index 0000000000..12ab1494e3
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultItemCollectionTest.cs
@@ -0,0 +1,54 @@
+// 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 Xunit;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public class DefaultItemCollectionTest
+    {
+        [Fact]
+        public void Get_MissingValueReturnsNull()
+        {
+            // Arrange
+            var items = new DefaultItemCollection();
+
+            // Act
+            var value = items["foo"];
+
+            // Assert
+            Assert.Null(value);
+        }
+
+        [Fact]
+        public void GetAndSet_ReturnsValue()
+        {
+            // Arrange
+            var items = new DefaultItemCollection();
+
+            var expected = "bar";
+            items["foo"] = expected;
+
+            // Act
+            var value = items["foo"];
+
+            // Assert
+            Assert.Same(expected, value);
+        }
+
+        [Fact]
+        public void Set_CanSetValueToNull()
+        {
+            // Arrange
+            var items = new DefaultItemCollection();
+            
+            items["foo"] = "bar";
+
+            // Act
+            items["foo"] = null;
+
+            // Assert
+            Assert.Null(items["foo"]);
+        }
+    }
+}
diff --git a/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultRazorCodeDocumentTest.cs b/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultRazorCodeDocumentTest.cs
new file mode 100644
index 0000000000..0616fcd449
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultRazorCodeDocumentTest.cs
@@ -0,0 +1,24 @@
+// 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 Xunit;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public class DefaultRazorCodeDocumentTest
+    {
+        [Fact]
+        public void Ctor()
+        {
+            // Arrange
+            var source = TestRazorSourceDocument.Create();
+
+            // Act
+            var code = new DefaultRazorCodeDocument(source);
+
+            // Assert
+            Assert.Same(source, code.Source);
+            Assert.NotNull(code.Items);
+        }
+    }
+}
diff --git a/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultRazorEngineBuilderTest.cs b/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultRazorEngineBuilderTest.cs
new file mode 100644
index 0000000000..4be9486162
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultRazorEngineBuilderTest.cs
@@ -0,0 +1,42 @@
+// 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.Linq;
+using Moq;
+using Xunit;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public class DefaultRazorEngineBuilderTest
+    {
+        [Fact]
+        public void Build_AddsFeaturesAndPhases()
+        {
+            // Arrange
+            var builder = new DefaultRazorEngineBuilder();
+
+            builder.Features.Add(Mock.Of<IRazorEngineFeature>());
+            builder.Features.Add(Mock.Of<IRazorEngineFeature>());
+
+            builder.Phases.Add(Mock.Of<IRazorEnginePhase>());
+            builder.Phases.Add(Mock.Of<IRazorEnginePhase>());
+
+            var features = builder.Features.ToArray();
+            var phases = builder.Phases.ToArray();
+
+            // Act
+            var engine = builder.Build();
+
+            // Assert
+            Assert.Collection(
+                engine.Features,
+                f => Assert.Same(features[0], f),
+                f => Assert.Same(features[1], f));
+
+            Assert.Collection(
+                engine.Phases,
+                p => Assert.Same(phases[0], p),
+                p => Assert.Same(phases[1], p));
+        }
+    }
+}
diff --git a/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultRazorEngineTest.cs b/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultRazorEngineTest.cs
new file mode 100644
index 0000000000..3be3f0f69c
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultRazorEngineTest.cs
@@ -0,0 +1,72 @@
+// 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 Moq;
+using Xunit;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public class DefaultRazorEngineTest
+    {
+        [Fact]
+        public void Ctor_InitializesPhasesAndFeatures()
+        {
+            // Arrange
+            var features = new IRazorEngineFeature[]
+            {
+                Mock.Of<IRazorEngineFeature>(),
+                Mock.Of<IRazorEngineFeature>(),
+            };
+
+            var phases = new IRazorEnginePhase[]
+            {
+                Mock.Of<IRazorEnginePhase>(),
+                Mock.Of<IRazorEnginePhase>(),
+            };
+
+            // Act
+            var engine = new DefaultRazorEngine(features, phases);
+
+            // Assert
+            for (var i = 0; i < features.Length; i++)
+            {
+                Assert.Same(engine, features[i].Engine);
+            }
+
+            for (var i = 0; i < phases.Length; i++)
+            {
+                Assert.Same(engine, phases[i].Engine);
+            }
+        }
+
+        [Fact]
+        public void Process_CallsAllPhases()
+        {
+            // Arrange
+            var features = new IRazorEngineFeature[]
+            {
+                Mock.Of<IRazorEngineFeature>(),
+                Mock.Of<IRazorEngineFeature>(),
+            };
+
+            var phases = new IRazorEnginePhase[]
+            {
+                Mock.Of<IRazorEnginePhase>(),
+                Mock.Of<IRazorEnginePhase>(),
+            };
+
+            var engine = new DefaultRazorEngine(features, phases);
+            var document = TestRazorCodeDocument.CreateEmpty();
+
+            // Act
+            engine.Process(document);
+
+            // Assert
+            for (var i = 0; i < phases.Length; i++)
+            {
+                var mock = Mock.Get(phases[i]);
+                mock.Verify(p => p.Execute(document), Times.Once());
+            }
+        }
+    }
+}
diff --git a/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultRazorSourceDocumentTest.cs b/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultRazorSourceDocumentTest.cs
new file mode 100644
index 0000000000..b1c9436fb3
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultRazorSourceDocumentTest.cs
@@ -0,0 +1,99 @@
+// 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.IO;
+using System.Text;
+using Xunit;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public class DefaultRazorSourceDocumentTest
+    {
+        [Fact]
+        public void Filename()
+        {
+            // Arrange
+            var content = CreateContent();
+
+            // Act
+            var document = new DefaultRazorSourceDocument(content, Encoding.UTF8, filename: "file.cshtml");
+
+            // Assert
+            Assert.Equal("file.cshtml", document.Filename);
+        }
+
+        [Fact]
+        public void Filename_Null()
+        {
+            // Arrange
+            var content = CreateContent();
+
+            // Act
+            var document = new DefaultRazorSourceDocument(content, Encoding.UTF8, filename: null);
+
+            // Assert
+            Assert.Null(document.Filename);
+        }
+
+        [Fact]
+        public void CreateReader_WithEncoding()
+        {
+            // Arrange
+            var content = CreateContent("Hi", encoding: Encoding.UTF8);
+            var document = new DefaultRazorSourceDocument(content, Encoding.UTF8, filename: null);
+
+            // Act
+            using (var reader = document.CreateReader())
+            {
+                // Assert
+                Assert.Equal("Hi", reader.ReadToEnd());
+            }
+        }
+
+        [Fact]
+        public void CreateReader_Null_DetectsEncoding()
+        {
+            // Arrange
+            var content = CreateContent("Hi", encoding: Encoding.UTF32);
+            var document = new DefaultRazorSourceDocument(content, encoding: null, filename: null);
+
+            // Act
+            using (var reader = document.CreateReader())
+            {
+                // Assert
+                Assert.Equal("Hi", reader.ReadToEnd());
+            }
+        }
+
+        [Fact]
+        public void CreateReader_DisposeReader_DoesNotDirtyDocument()
+        {
+            // Arrange
+            var content = CreateContent("Hi", encoding: Encoding.UTF32);
+            var document = new DefaultRazorSourceDocument(content, encoding: null, filename: null);
+
+            // Act & Assert
+            //
+            // (we should be able to do this twice to prove that the underlying data isn't disposed)
+            for (var i = 0; i < 2; i++)
+            {
+                using (var reader = document.CreateReader())
+                {
+                    // Assert
+                    Assert.Equal("Hi", reader.ReadToEnd());
+                }
+            }
+        }
+
+        private static MemoryStream CreateContent(string content = "Hello, World!", Encoding encoding = null)
+        {
+            var stream = new MemoryStream();
+            using (var writer = new StreamWriter(stream, encoding ?? Encoding.UTF8, bufferSize: 1024, leaveOpen: true))
+            {
+                writer.Write(content);
+            }
+
+            return stream;
+        }
+    }
+}
diff --git a/test/Microsoft.AspNetCore.Razor.Evolution.Test/IntegrationTest.cs b/test/Microsoft.AspNetCore.Razor.Evolution.Test/IntegrationTest.cs
new file mode 100644
index 0000000000..7fe96c1360
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Razor.Evolution.Test/IntegrationTest.cs
@@ -0,0 +1,25 @@
+// 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 Xunit;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public class IntegrationTest
+    {
+        [Fact]
+        public void BuildEngine_CallProcess()
+        {
+            // Arrange
+            var engine = RazorEngine.Create();
+
+            var document = RazorCodeDocument.Create(TestRazorSourceDocument.Create());
+
+            // Act
+            engine.Process(document);
+
+            // Assert
+            // (nothing to verify yet)
+        }
+    }
+}
diff --git a/test/Microsoft.AspNetCore.Razor.Evolution.Test/RazorCodeDocumentTest.cs b/test/Microsoft.AspNetCore.Razor.Evolution.Test/RazorCodeDocumentTest.cs
new file mode 100644
index 0000000000..8c1a0bbe59
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Razor.Evolution.Test/RazorCodeDocumentTest.cs
@@ -0,0 +1,24 @@
+// 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 Xunit;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public class RazorCodeDocumentTest
+    {
+        [Fact]
+        public void Create()
+        {
+            // Arrange
+            var source = TestRazorSourceDocument.Create();
+
+            // Act
+            var code = RazorCodeDocument.Create(source);
+
+            // Assert
+            Assert.Same(source, code.Source);
+            Assert.NotNull(code.Items);
+        }
+    }
+}
diff --git a/test/Microsoft.AspNetCore.Razor.Evolution.Test/RazorEngineTest.cs b/test/Microsoft.AspNetCore.Razor.Evolution.Test/RazorEngineTest.cs
new file mode 100644
index 0000000000..e35f7d0874
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Razor.Evolution.Test/RazorEngineTest.cs
@@ -0,0 +1,70 @@
+// 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.Linq;
+using Moq;
+using Xunit;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public class RazorEngineTest
+    {
+        [Fact]
+        public void Create_NoArg_CreatesDefaultEngine()
+        {
+            // Arrange
+            // Act
+            var engine = RazorEngine.Create();
+
+            // Assert
+            Assert.IsType<DefaultRazorEngine>(engine);
+            Assert.Empty(engine.Features);
+            Assert.Empty(engine.Phases);
+        }
+
+        [Fact]
+        public void Create_Null_CreatesDefaultEngine()
+        {
+            // Arrange
+            // Act
+            var engine = RazorEngine.Create(configure: null);
+
+            // Assert
+            Assert.IsType<DefaultRazorEngine>(engine);
+            Assert.Empty(engine.Features);
+            Assert.Empty(engine.Phases);
+        }
+
+        [Fact]
+        public void Create_Lambda_AddsFeaturesAndPhases()
+        {
+            // Arrange
+            IRazorEngineFeature[] features = null;
+            IRazorEnginePhase[] phases = null;
+
+            // Act
+            var engine = RazorEngine.Create(builder =>
+            {
+                builder.Features.Add(Mock.Of<IRazorEngineFeature>());
+                builder.Features.Add(Mock.Of<IRazorEngineFeature>());
+
+                builder.Phases.Add(Mock.Of<IRazorEnginePhase>());
+                builder.Phases.Add(Mock.Of<IRazorEnginePhase>());
+
+                features = builder.Features.ToArray();
+                phases = builder.Phases.ToArray();
+            });
+
+            // Assert
+            Assert.Collection(
+                engine.Features,
+                f => Assert.Same(features[0], f),
+                f => Assert.Same(features[1], f));
+
+            Assert.Collection(
+                engine.Phases,
+                p => Assert.Same(phases[0], p),
+                p => Assert.Same(phases[1], p));
+        }
+    }
+}
diff --git a/test/Microsoft.AspNetCore.Razor.Evolution.Test/RazorSourceDocumentTest.cs b/test/Microsoft.AspNetCore.Razor.Evolution.Test/RazorSourceDocumentTest.cs
new file mode 100644
index 0000000000..87d85b5764
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Razor.Evolution.Test/RazorSourceDocumentTest.cs
@@ -0,0 +1,39 @@
+// 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.Text;
+using Xunit;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    public class RazorSourceDocumentTest
+    {
+        [Fact]
+        public void Create()
+        {
+            // Arrange
+            var content = TestRazorSourceDocument.CreateContent();
+
+            // Act
+            var document = RazorSourceDocument.ReadFrom(content, "file.cshtml");
+
+            // Assert
+            Assert.Equal("file.cshtml", document.Filename);
+            Assert.Null(Assert.IsType<DefaultRazorSourceDocument>(document).Encoding);
+        }
+
+        [Fact]
+        public void Create_WithEncoding()
+        {
+            // Arrange
+            var content = TestRazorSourceDocument.CreateContent(encoding: Encoding.UTF32);
+
+            // Act
+            var document = RazorSourceDocument.ReadFrom(content, "file.cshtml", Encoding.UTF32);
+
+            // Assert
+            Assert.Equal("file.cshtml", document.Filename);
+            Assert.Same(Encoding.UTF32, Assert.IsType<DefaultRazorSourceDocument>(document).Encoding);
+        }
+    }
+}
diff --git a/test/Microsoft.AspNetCore.Razor.Evolution.Test/TestRazorCodeDocument.cs b/test/Microsoft.AspNetCore.Razor.Evolution.Test/TestRazorCodeDocument.cs
new file mode 100644
index 0000000000..7cb0668e3f
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Razor.Evolution.Test/TestRazorCodeDocument.cs
@@ -0,0 +1,19 @@
+// 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.
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    internal class TestRazorCodeDocument : DefaultRazorCodeDocument
+    {
+        public static TestRazorCodeDocument CreateEmpty()
+        {
+            var source = TestRazorSourceDocument.Create(content: string.Empty);
+            return new TestRazorCodeDocument(source);
+        }
+
+        private TestRazorCodeDocument(RazorSourceDocument source)
+            : base(source)
+        {
+        }
+    }
+}
diff --git a/test/Microsoft.AspNetCore.Razor.Evolution.Test/TestRazorSourceDocument.cs b/test/Microsoft.AspNetCore.Razor.Evolution.Test/TestRazorSourceDocument.cs
new file mode 100644
index 0000000000..0fb1b37056
--- /dev/null
+++ b/test/Microsoft.AspNetCore.Razor.Evolution.Test/TestRazorSourceDocument.cs
@@ -0,0 +1,35 @@
+// 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.IO;
+using System.Text;
+
+namespace Microsoft.AspNetCore.Razor.Evolution
+{
+    internal class TestRazorSourceDocument : DefaultRazorSourceDocument
+    {
+        public static MemoryStream CreateContent(string content = "Hello, World!", Encoding encoding = null)
+        {
+            var stream = new MemoryStream();
+            using (var writer = new StreamWriter(stream, encoding ?? Encoding.UTF8, bufferSize: 1024, leaveOpen: true))
+            {
+                writer.Write(content);
+            }
+
+            stream.Seek(0L, SeekOrigin.Begin);
+
+            return stream;
+        }
+
+        public static RazorSourceDocument Create(string content = "Hello, world!", Encoding encoding = null)
+        {
+            var stream = CreateContent(content, encoding);
+            return new TestRazorSourceDocument(stream, encoding ?? Encoding.UTF8, "test.cshtml");
+        }
+
+        public TestRazorSourceDocument(MemoryStream stream, Encoding encoding, string filename) 
+            : base(stream, encoding, filename)
+        {
+        }
+    }
+}
diff --git a/test/Microsoft.AspNetCore.Razor.Evolution.Test/project.json b/test/Microsoft.AspNetCore.Razor.Evolution.Test/project.json
index 285620980c..725e4d54a0 100644
--- a/test/Microsoft.AspNetCore.Razor.Evolution.Test/project.json
+++ b/test/Microsoft.AspNetCore.Razor.Evolution.Test/project.json
@@ -3,6 +3,7 @@
   "dependencies": {
     "dotnet-test-xunit": "2.2.0-*",
     "Microsoft.AspNetCore.Razor.Evolution": "1.1.0-*",
+    "Moq": "4.6.36-*",
     "xunit": "2.2.0-*"
   },
   "testRunner": "xunit",