2 // ExpressionTest_LessThanOrEqual.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_LessThanOrEqual
41 [ExpectedException (typeof (ArgumentNullException))]
42 public void Arg1Null ()
44 Expression.LessThanOrEqual (null, Expression.Constant (1));
48 [ExpectedException (typeof (ArgumentNullException))]
49 public void Arg2Null ()
51 Expression.LessThanOrEqual (Expression.Constant (1), null);
55 [ExpectedException (typeof (InvalidOperationException))]
56 public void NoOperatorClass ()
58 Expression.LessThanOrEqual (Expression.Constant (new NoOpClass ()), Expression.Constant (new NoOpClass ()));
64 var expr = Expression.LessThanOrEqual (Expression.Constant (2.0), Expression.Constant (1.0));
65 Assert.AreEqual (ExpressionType.LessThanOrEqual, expr.NodeType);
66 Assert.AreEqual (typeof (bool), expr.Type);
67 Assert.IsNull (expr.Method);
68 Assert.AreEqual ("(2 <= 1)", expr.ToString ());
72 public void Integer ()
74 var expr = Expression.LessThanOrEqual (Expression.Constant (2), Expression.Constant (1));
75 Assert.AreEqual (ExpressionType.LessThanOrEqual, expr.NodeType);
76 Assert.AreEqual (typeof (bool), expr.Type);
77 Assert.IsNull (expr.Method);
78 Assert.AreEqual ("(2 <= 1)", expr.ToString ());
82 [ExpectedException (typeof (InvalidOperationException))]
83 public void MismatchedTypes ()
85 Expression.LessThanOrEqual (Expression.Constant (new OpClass ()), Expression.Constant (true));
89 [ExpectedException (typeof (InvalidOperationException))]
90 public void Boolean ()
92 Expression.LessThanOrEqual (Expression.Constant (true), Expression.Constant (false));
96 public void UserDefinedClass ()
98 MethodInfo mi = typeof (OpClass).GetMethod ("op_LessThanOrEqual");
100 Assert.IsNotNull (mi);
102 BinaryExpression expr = Expression.LessThanOrEqual (Expression.Constant (new OpClass ()), Expression.Constant (new OpClass ()));
103 Assert.AreEqual (ExpressionType.LessThanOrEqual, expr.NodeType);
104 Assert.AreEqual (typeof (bool), expr.Type);
105 Assert.AreEqual (mi, expr.Method);
106 Assert.AreEqual ("op_LessThanOrEqual", expr.Method.Name);
107 Assert.AreEqual ("(value(MonoTests.System.Linq.Expressions.OpClass) <= value(MonoTests.System.Linq.Expressions.OpClass))", expr.ToString ());
111 public void NullableInt32LessThanOrEqual ()
113 var l = Expression.Parameter (typeof (int?), "l");
114 var r = Expression.Parameter (typeof (int?), "r");
116 var lte = Expression.Lambda<Func<int?, int?, bool>> (
117 Expression.LessThanOrEqual (l, r), l, r).Compile ();
119 Assert.IsFalse (lte (null, null));
120 Assert.IsFalse (lte (null, 1));
121 Assert.IsFalse (lte (null, -1));
122 Assert.IsFalse (lte (1, null));
123 Assert.IsFalse (lte (-1, null));
124 Assert.IsTrue (lte (1, 2));
125 Assert.IsFalse (lte (2, 1));
126 Assert.IsTrue (lte (1, 1));
130 public void NullableInt32LessThanOrEqualLiftedToNull ()
132 var l = Expression.Parameter (typeof (int?), "l");
133 var r = Expression.Parameter (typeof (int?), "r");
135 var lte = Expression.Lambda<Func<int?, int?, bool?>> (
136 Expression.LessThanOrEqual (l, r, true, null), l, r).Compile ();
138 Assert.AreEqual ((bool?) null, lte (null, null));
139 Assert.AreEqual ((bool?) null, lte (null, 1));
140 Assert.AreEqual ((bool?) null, lte (null, -1));
141 Assert.AreEqual ((bool?) null, lte (1, null));
142 Assert.AreEqual ((bool?) null, lte (-1, null));
143 Assert.AreEqual ((bool?) true, lte (1, 2));
144 Assert.AreEqual ((bool?) false, lte (2, 1));
145 Assert.AreEqual ((bool?) true, lte (1, 1));
151 public Slot (int val)
156 public static bool operator >= (Slot a, Slot b)
158 return a.Value >= b.Value;
161 public static bool operator <= (Slot a, Slot b)
163 return a.Value <= b.Value;
168 [Category ("NotWorkingInterpreter")]
169 public void UserDefinedLessThanOrEqualLifted ()
171 var l = Expression.Parameter (typeof (Slot?), "l");
172 var r = Expression.Parameter (typeof (Slot?), "r");
174 var node = Expression.LessThanOrEqual (l, r);
175 Assert.IsTrue (node.IsLifted);
176 Assert.IsFalse (node.IsLiftedToNull);
177 Assert.AreEqual (typeof (bool), node.Type);
178 Assert.IsNotNull (node.Method);
180 var lte = Expression.Lambda<Func<Slot?, Slot?, bool>> (node, l, r).Compile ();
182 Assert.AreEqual (false, lte (new Slot (1), new Slot (0)));
183 Assert.AreEqual (true, lte (new Slot (-1), new Slot (1)));
184 Assert.AreEqual (true, lte (new Slot (1), new Slot (1)));
185 Assert.AreEqual (false, lte (null, new Slot (1)));
186 Assert.AreEqual (false, lte (new Slot (1), null));
187 Assert.AreEqual (false, lte (null, null));
191 [Category ("NotWorkingInterpreter")]
192 public void UserDefinedLessThanOrEqualLiftedToNull ()
194 var l = Expression.Parameter (typeof (Slot?), "l");
195 var r = Expression.Parameter (typeof (Slot?), "r");
197 var node = Expression.LessThanOrEqual (l, r, true, null);
198 Assert.IsTrue (node.IsLifted);
199 Assert.IsTrue (node.IsLiftedToNull);
200 Assert.AreEqual (typeof (bool?), node.Type);
201 Assert.IsNotNull (node.Method);
203 var lte = Expression.Lambda<Func<Slot?, Slot?, bool?>> (node, l, r).Compile ();
205 Assert.AreEqual (false, lte (new Slot (1), new Slot (0)));
206 Assert.AreEqual (true, lte (new Slot (-1), new Slot (1)));
207 Assert.AreEqual (true, lte (new Slot (1), new Slot (1)));
208 Assert.AreEqual (null, lte (null, new Slot (1)));
209 Assert.AreEqual (null, lte (new Slot (1), null));
210 Assert.AreEqual (null, lte (null, null));