5 // Jb Evain (jbevain@novell.com)
7 // (C) 2009 Novell, Inc. (http://www.novell.com)
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11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 using System.Collections.Generic;
33 using NUnit.Framework;
35 namespace MonoTests.System.Linq {
38 public class LookupTest {
42 public string Name { get; set; }
43 public int Value { get; set; }
45 public Color (string name, int value)
52 static IEnumerable<Color> GetColors ()
54 yield return new Color ("Red", 0xff0000);
55 yield return new Color ("Green", 0x00ff00);
56 yield return new Color ("Blue", 0x0000ff);
60 public void LookupIgnoreCase ()
62 var lookup = GetColors ().ToLookup (
65 StringComparer.OrdinalIgnoreCase);
67 Assert.AreEqual (0xff0000, lookup ["red"].First ());
68 Assert.AreEqual (0x00ff00, lookup ["GrEeN"].First ());
69 Assert.AreEqual (0x0000ff, lookup ["Blue"].First ());
73 public void LookupContains()
75 var lookup = new [] { "hi", "bye" }.ToLookup (c => c [0].ToString ());
77 Assert.IsTrue (lookup.Contains ("h"));
78 Assert.IsFalse (lookup.Contains ("d"));
79 Assert.IsFalse (lookup.Contains (null));
83 public void LookupContainsNull()
85 var lookup = new [] { "hi", "bye", "42" }.ToLookup (c => (Char.IsNumber (c [0]) ? null : c [0].ToString ()));
87 Assert.IsTrue (lookup.Contains ("h"));
88 Assert.IsTrue (lookup.Contains (null));
89 Assert.IsFalse (lookup.Contains ("d"));
93 public void LookupEnumeratorWithoutNull()
95 var lookup = new [] { "hi", "bye" }.ToLookup (c => c [0].ToString ());
97 Assert.IsTrue (lookup.Any (g => g.Key == "h"));
98 Assert.IsTrue (lookup.Any (g => g.Key == "b"));
99 Assert.IsFalse (lookup.Any (g => g.Key == null));
103 public void LookupEnumeratorWithNull()
105 var lookup = new [] { "hi", "bye", "42" }.ToLookup (c => (Char.IsNumber (c [0]) ? null : c [0].ToString ()));
107 Assert.IsTrue (lookup.Any (g => g.Key == "h"));
108 Assert.IsTrue (lookup.Any (g => g.Key == "b"));
109 Assert.IsTrue (lookup.Any (g => g.Key == null));
113 public void LookupNullKeyNone()
115 var lookup = new [] { "hi", "bye" }.ToLookup (c => c [0].ToString ());
117 Assert.AreEqual (2, lookup.Count);
118 Assert.AreEqual (0, lookup [null].Count ());
122 public void EmptyResult ()
124 var lookup = GetColors ().ToLookup (
127 StringComparer.OrdinalIgnoreCase);
129 var l = lookup ["notexist"];
130 Assert.IsNotNull (l);
131 int [] values = (int []) l;
132 Assert.AreEqual (values.Length, 0);