2 // ExpressionTest_GreaterThan.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_GreaterThan
41 [ExpectedException (typeof (ArgumentNullException))]
42 public void Arg1Null ()
44 Expression.GreaterThan (null, Expression.Constant (1));
48 [ExpectedException (typeof (ArgumentNullException))]
49 public void Arg2Null ()
51 Expression.GreaterThan (Expression.Constant (1), null);
55 [ExpectedException (typeof (InvalidOperationException))]
56 public void NoOperatorClass ()
58 Expression.GreaterThan (Expression.Constant (new NoOpClass ()), Expression.Constant (new NoOpClass ()));
64 var expr = Expression.GreaterThan (Expression.Constant (2.0), Expression.Constant (1.0));
65 Assert.AreEqual (ExpressionType.GreaterThan, 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.GreaterThan (Expression.Constant (2), Expression.Constant (1));
75 Assert.AreEqual (ExpressionType.GreaterThan, 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.GreaterThan (Expression.Constant (new OpClass ()), Expression.Constant (true));
89 [ExpectedException (typeof (InvalidOperationException))]
90 public void Boolean ()
92 Expression.GreaterThan (Expression.Constant (true), Expression.Constant (false));
96 [ExpectedException (typeof (InvalidOperationException))]
97 public void StringS ()
99 Expression.GreaterThan (Expression.Constant (""), Expression.Constant (""));
103 public void UserDefinedClass ()
105 MethodInfo mi = typeof (OpClass).GetMethod ("op_GreaterThan");
107 Assert.IsNotNull (mi);
109 BinaryExpression expr = Expression.GreaterThan (Expression.Constant (new OpClass ()), Expression.Constant (new OpClass ()));
110 Assert.AreEqual (ExpressionType.GreaterThan, expr.NodeType);
111 Assert.AreEqual (typeof (bool), expr.Type);
112 Assert.AreEqual (mi, expr.Method);
113 Assert.AreEqual ("op_GreaterThan", expr.Method.Name);
114 Assert.AreEqual ("(value(MonoTests.System.Linq.Expressions.OpClass) > value(MonoTests.System.Linq.Expressions.OpClass))", expr.ToString ());
118 public void TestCompiled ()
120 ParameterExpression a = Expression.Parameter(typeof(int), "a");
121 ParameterExpression b = Expression.Parameter(typeof(int), "b");
123 BinaryExpression p = Expression.GreaterThan (a, b);
125 Expression<Func<int,int,bool>> pexpr = Expression.Lambda<Func<int,int,bool>> (
126 p, new ParameterExpression [] { a, b });
128 Func<int,int,bool> compiled = pexpr.Compile ();
129 Assert.AreEqual (true, compiled (10, 1), "tc1");
130 Assert.AreEqual (true, compiled (1, 0), "tc2");
131 Assert.AreEqual (true, compiled (Int32.MinValue+1, Int32.MinValue), "tc3");
132 Assert.AreEqual (false, compiled (-1, 0), "tc4");
133 Assert.AreEqual (false, compiled (0, Int32.MaxValue), "tc5");
137 public void NullableInt32GreaterThan ()
139 var l = Expression.Parameter (typeof (int?), "l");
140 var r = Expression.Parameter (typeof (int?), "r");
142 var gt = Expression.Lambda<Func<int?, int?, bool>> (
143 Expression.GreaterThan (l, r), l, r).Compile ();
145 Assert.IsFalse (gt (null, null));
146 Assert.IsFalse (gt (null, 1));
147 Assert.IsFalse (gt (null, -1));
148 Assert.IsFalse (gt (1, null));
149 Assert.IsFalse (gt (-1, null));
150 Assert.IsFalse (gt (1, 2));
151 Assert.IsTrue (gt (2, 1));
152 Assert.IsFalse (gt (1, 1));
156 public void NullableInt32GreaterThanLiftedToNull ()
158 var l = Expression.Parameter (typeof (int?), "l");
159 var r = Expression.Parameter (typeof (int?), "r");
161 var gt = Expression.Lambda<Func<int?, int?, bool?>> (
162 Expression.GreaterThan (l, r, true, null), l, r).Compile ();
164 Assert.AreEqual ((bool?) null, gt (null, null));
165 Assert.AreEqual ((bool?) null, gt (null, 1));
166 Assert.AreEqual ((bool?) null, gt (null, -1));
167 Assert.AreEqual ((bool?) null, gt (1, null));
168 Assert.AreEqual ((bool?) null, gt (-1, null));
169 Assert.AreEqual ((bool?) false, gt (1, 2));
170 Assert.AreEqual ((bool?) true, gt (2, 1));
171 Assert.AreEqual ((bool?) false, gt (1, 1));
177 public Slot (int val)
182 public static bool operator > (Slot a, Slot b)
184 return a.Value > b.Value;
187 public static bool operator < (Slot a, Slot b)
189 return a.Value < b.Value;
194 [Category ("NotWorkingInterpreter")]
195 public void UserDefinedGreaterThanLifted ()
197 var l = Expression.Parameter (typeof (Slot?), "l");
198 var r = Expression.Parameter (typeof (Slot?), "r");
200 var node = Expression.GreaterThan (l, r);
201 Assert.IsTrue (node.IsLifted);
202 Assert.IsFalse (node.IsLiftedToNull);
203 Assert.AreEqual (typeof (bool), node.Type);
204 Assert.IsNotNull (node.Method);
206 var gte = Expression.Lambda<Func<Slot?, Slot?, bool>> (node, l, r).Compile ();
208 Assert.AreEqual (true, gte (new Slot (1), new Slot (0)));
209 Assert.AreEqual (false, gte (new Slot (-1), new Slot (1)));
210 Assert.AreEqual (false, gte (new Slot (1), new Slot (1)));
211 Assert.AreEqual (false, gte (null, new Slot (1)));
212 Assert.AreEqual (false, gte (new Slot (1), null));
213 Assert.AreEqual (false, gte (null, null));
217 [Category ("NotWorkingInterpreter")]
218 public void UserDefinedGreaterThanLiftedToNull ()
220 var l = Expression.Parameter (typeof (Slot?), "l");
221 var r = Expression.Parameter (typeof (Slot?), "r");
223 var node = Expression.GreaterThan (l, r, true, null);
224 Assert.IsTrue (node.IsLifted);
225 Assert.IsTrue (node.IsLiftedToNull);
226 Assert.AreEqual (typeof (bool?), node.Type);
227 Assert.IsNotNull (node.Method);
229 var gte = Expression.Lambda<Func<Slot?, Slot?, bool?>> (node, l, r).Compile ();
231 Assert.AreEqual (true, gte (new Slot (1), new Slot (0)));
232 Assert.AreEqual (false, gte (new Slot (-1), new Slot (1)));
233 Assert.AreEqual (false, gte (new Slot (1), new Slot (1)));
234 Assert.AreEqual (null, gte (null, new Slot (1)));
235 Assert.AreEqual (null, gte (new Slot (1), null));
236 Assert.AreEqual (null, gte (null, null));
245 [ExpectedException (typeof (InvalidOperationException))]
246 public void EnumGreaterThan ()
248 Expression.GreaterThan (
249 Foo.Bar.ToConstant (),
250 Foo.Baz.ToConstant ());