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Load Assembly referenced from within a lambda closure (#135)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,173 @@ | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
| // See the LICENSE file in the project root for more information. | ||
|
|
||
| using System; | ||
| using System.IO; | ||
| using System.Reflection; | ||
| using System.Runtime.Serialization.Formatters.Binary; | ||
| using Microsoft.Spark.Utils; | ||
| using Xunit; | ||
|
|
||
| namespace Microsoft.Spark.UnitTest | ||
| { | ||
| public class UdfSerDeTests | ||
| { | ||
| [Serializable] | ||
| private class TestClass | ||
| { | ||
| private string _str; | ||
|
|
||
| public TestClass(string s) | ||
| { | ||
| _str = s; | ||
| } | ||
|
|
||
| public string Concat(string s) | ||
| { | ||
| if (_str == null) | ||
| { | ||
| return s + s; | ||
| } | ||
|
|
||
| return _str + s; | ||
| } | ||
|
|
||
| public override bool Equals(object obj) | ||
| { | ||
| var that = obj as TestClass; | ||
|
|
||
| if (that == null) | ||
| { | ||
| return false; | ||
| } | ||
|
|
||
| return _str == that._str; | ||
| } | ||
|
|
||
| public override int GetHashCode() | ||
| { | ||
| return base.GetHashCode(); | ||
| } | ||
| } | ||
|
|
||
| [Fact] | ||
| public void TestUdfSerDe() | ||
| { | ||
| { | ||
| // Without closure. | ||
| Func<int, int> expectedUdf = i => 10 * i; | ||
| Delegate actualUdf = SerDe(expectedUdf); | ||
|
|
||
| VerifyUdfSerDe(expectedUdf, actualUdf, false); | ||
| Assert.Equal(100, ((Func<int, int>)actualUdf)(10)); | ||
| } | ||
|
|
||
| { | ||
| // With closure where the delegate target is an anonymous class. | ||
| // The target will contain fields ["tc1", "tc2"], where "tc1" is | ||
| // non null and "tc2" is null. | ||
| TestClass tc1 = new TestClass("Test"); | ||
| TestClass tc2 = null; | ||
| Func<string, string> expectedUdf = | ||
| (s) => | ||
| { | ||
| if (tc2 == null) | ||
| { | ||
| return tc1.Concat(s); | ||
| } | ||
| return s; | ||
| }; | ||
| Delegate actualUdf = SerDe(expectedUdf); | ||
|
|
||
| VerifyUdfSerDe(expectedUdf, actualUdf, true); | ||
| Assert.Equal("TestHelloWorld", ((Func<string, string>)actualUdf)("HelloWorld")); | ||
| } | ||
|
|
||
| { | ||
| // With closure where the delegate target is TestClass | ||
| // and target's field "_str" is set to "Test". | ||
| TestClass tc = new TestClass("Test"); | ||
| Func<string, string> expectedUdf = tc.Concat; | ||
| Delegate actualUdf = SerDe(expectedUdf); | ||
|
|
||
| VerifyUdfSerDe(expectedUdf, actualUdf, true); | ||
| Assert.Equal("TestHelloWorld", ((Func<string, string>)actualUdf)("HelloWorld")); | ||
| } | ||
|
|
||
| { | ||
| // With closure where the delegate target is TestClass, | ||
| // and target's field "_str" is set to null. | ||
| TestClass tc = new TestClass(null); | ||
| Func<string, string> expectedUdf = tc.Concat; | ||
| Delegate actualUdf = SerDe(expectedUdf); | ||
|
|
||
| VerifyUdfSerDe(expectedUdf, actualUdf, true); | ||
| Assert.Equal( | ||
| "HelloWorldHelloWorld", | ||
| ((Func<string, string>)actualUdf)("HelloWorld")); | ||
| } | ||
| } | ||
|
|
||
| private void VerifyUdfSerDe(Delegate expectedUdf, Delegate actualUdf, bool hasClosure) | ||
| { | ||
| VerifyUdfData( | ||
| UdfSerDe.Serialize(expectedUdf), | ||
| UdfSerDe.Serialize(actualUdf), | ||
| hasClosure); | ||
| VerifyDelegate(expectedUdf, actualUdf); | ||
| } | ||
|
|
||
| private void VerifyUdfData( | ||
| UdfSerDe.UdfData expectedUdfData, | ||
| UdfSerDe.UdfData actualUdfData, | ||
| bool hasClosure) | ||
| { | ||
| Assert.Equal(expectedUdfData, actualUdfData); | ||
|
|
||
| if (!hasClosure) | ||
| { | ||
| Assert.Null(expectedUdfData.TargetData.Fields); | ||
| Assert.Null(actualUdfData.TargetData.Fields); | ||
| } | ||
| } | ||
|
|
||
| private void VerifyDelegate(Delegate expectedDelegate, Delegate actualDelegate) | ||
| { | ||
| Assert.Equal(expectedDelegate.GetType(), actualDelegate.GetType()); | ||
| Assert.Equal(expectedDelegate.Method, actualDelegate.Method); | ||
| Assert.Equal(expectedDelegate.Target.GetType(), actualDelegate.Target.GetType()); | ||
|
|
||
| FieldInfo[] expectedFields = expectedDelegate.Target.GetType().GetFields(); | ||
| FieldInfo[] actualFields = actualDelegate.Target.GetType().GetFields(); | ||
| Assert.Equal(expectedFields, actualFields); | ||
| } | ||
|
|
||
| private Delegate SerDe(Delegate udf) | ||
| { | ||
| return Deserialize(Serialize(udf)); | ||
| } | ||
|
|
||
| private byte[] Serialize(Delegate udf) | ||
| { | ||
| UdfSerDe.UdfData udfData = UdfSerDe.Serialize(udf); | ||
|
|
||
| using (var ms = new MemoryStream()) | ||
| { | ||
| var bf = new BinaryFormatter(); | ||
| bf.Serialize(ms, udfData); | ||
| return ms.ToArray(); | ||
| } | ||
| } | ||
|
|
||
| private Delegate Deserialize(byte[] serializedUdf) | ||
| { | ||
| using (var ms = new MemoryStream(serializedUdf, false)) | ||
| { | ||
| var bf = new BinaryFormatter(); | ||
| UdfSerDe.UdfData udfData = (UdfSerDe.UdfData)bf.Deserialize(ms); | ||
| return UdfSerDe.Deserialize(udfData); | ||
| } | ||
| } | ||
| } | ||
| } |
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