2 // ExpressionTest_Not.cs
5 // Jb Evain (jbevain@novell.com)
7 // (C) 2008 Novell, Inc. (http://www.novell.com)
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30 using System.Reflection;
32 using System.Linq.Expressions;
33 using NUnit.Framework;
35 namespace MonoTests.System.Linq.Expressions
38 public class ExpressionTest_Not
41 [ExpectedException (typeof (ArgumentNullException))]
42 public void Arg1Null ()
44 Expression.Not (null);
48 [ExpectedException (typeof (ArgumentException))]
49 public void MethodArgNotStatic ()
51 Expression.Not (Expression.Constant (new object ()), typeof (OpClass).GetMethod ("WrongUnaryNotStatic"));
55 [ExpectedException (typeof (ArgumentException))]
56 public void MethodArgParameterCount ()
58 Expression.Not (Expression.Constant (new object ()), typeof (OpClass).GetMethod ("WrongUnaryParameterCount"));
62 [ExpectedException (typeof (ArgumentException))]
63 public void MethodArgReturnsVoid ()
65 Expression.Not (Expression.Constant (new object ()), typeof (OpClass).GetMethod ("WrongUnaryReturnVoid"));
71 var up = Expression.Not (1.ToConstant ());
72 Assert.AreEqual ("Not(1)", up.ToString ());
76 public void UserDefinedClass ()
78 var mi = typeof (OpClass).GetMethod ("op_LogicalNot");
80 var expr = Expression.Not (Expression.Constant (new OpClass ()));
81 Assert.AreEqual (ExpressionType.Not, expr.NodeType);
82 Assert.AreEqual (typeof (OpClass), expr.Type);
83 Assert.AreEqual (mi, expr.Method);
84 Assert.AreEqual ("op_LogicalNot", expr.Method.Name);
85 Assert.AreEqual ("Not(value(MonoTests.System.Linq.Expressions.OpClass))", expr.ToString ());
89 public void NotNullableInt32 ()
91 var n = Expression.Not (Expression.Parameter (typeof (int?), ""));
92 Assert.AreEqual (typeof (int?), n.Type);
93 Assert.IsTrue (n.IsLifted);
94 Assert.IsTrue (n.IsLiftedToNull);
95 Assert.IsNull (n.Method);
99 public void NotNullableBool ()
101 var n = Expression.Not (Expression.Parameter (typeof (bool?), ""));
102 Assert.AreEqual (typeof (bool?), n.Type);
103 Assert.IsTrue (n.IsLifted);
104 Assert.IsTrue (n.IsLiftedToNull);
105 Assert.IsNull (n.Method);
109 public void CompileNotInt32 ()
111 var p = Expression.Parameter (typeof (int), "i");
112 var not = Expression.Lambda<Func<int, int>> (Expression.Not (p), p).Compile ();
114 Assert.AreEqual (-2, not (1));
115 Assert.AreEqual (-4, not (3));
116 Assert.AreEqual (2, not (-3));
120 public void CompiledNotNullableInt32 ()
122 var p = Expression.Parameter (typeof (int?), "i");
123 var not = Expression.Lambda<Func<int?, int?>> (Expression.Not (p), p).Compile ();
125 Assert.AreEqual (null, not (null));
126 Assert.AreEqual ((int?) -4, not (3));
127 Assert.AreEqual ((int?) 2, not (-3));
131 public void CompileNotBool ()
133 var p = Expression.Parameter (typeof (bool), "i");
134 var not = Expression.Lambda<Func<bool, bool>> (Expression.Not (p), p).Compile ();
136 Assert.AreEqual (false, not (true));
137 Assert.AreEqual (true, not (false));
141 public void CompiledNotNullableBool ()
143 var p = Expression.Parameter (typeof (bool?), "i");
144 var not = Expression.Lambda<Func<bool?, bool?>> (Expression.Not (p), p).Compile ();
146 Assert.AreEqual ((bool?) null, not (null));
147 Assert.AreEqual ((bool?) false, not (true));
148 Assert.AreEqual ((bool?) true, not (false));
154 public Slot (int value)
159 public static bool operator ! (Slot s)
166 [Category ("NotWorkingInterpreter")]
167 public void UserDefinedNotNullable ()
169 var s = Expression.Parameter (typeof (Slot?), "s");
170 var node = Expression.Not (s);
171 Assert.IsTrue (node.IsLifted);
172 Assert.IsTrue (node.IsLiftedToNull);
173 Assert.AreEqual (typeof (bool?), node.Type);
174 Assert.AreEqual (typeof (Slot).GetMethod ("op_LogicalNot"), node.Method);
176 var not = Expression.Lambda<Func<Slot?, bool?>> (node, s).Compile ();
178 Assert.AreEqual (null, not (null));
179 Assert.AreEqual (true, not (new Slot (1)));
180 Assert.AreEqual (false, not (new Slot (0)));