mcs/tests/gtest-linq-05.cs

   1
   2
   3 using System;
   4 using System.Collections.Generic;
   5 using System.Linq;
   6
   7 class OrderByTests
   8 {
   9         class Data
  10         {
  11                 public int ID { get; set; }
  12                 public string Name { get; set; }
  13
  14                 public override string ToString ()
  15                 {
  16                         return ID + " " + Name;
  17                 }
  18         }
  19
  20         public static int Main ()
  21         {
  22                 int[] int_array = new int [] { 0, 1 };
  23                 string[] string_array = new string[] { "f", "a", "z", "aa" };
  24
  25                 IEnumerable<int> e;
  26
  27                 e = from int i in int_array orderby i select i;
  28
  29                 List<int> l = new List<int> (e);
  30                 if (l [0] != 0)
  31                         return 1;
  32
  33                 if (l [1] != 1)
  34                         return 2;
  35
  36                 e = from int i in int_array orderby i ascending select i;
  37
  38                 l = new List<int> (e);
  39                 if (l [0] != 0)
  40                         return 100;
  41
  42                 if (l [1] != 1)
  43                         return 101;
  44
  45                 e = from i in int_array orderby i descending select i + 1;
  46                 l = new List<int> (e);
  47                 if (l [0] != 2)
  48                         return 3;
  49
  50                 if (l [1] != 1)
  51                         return 4;
  52
  53                 IEnumerable<string> s;
  54                 s = from i in string_array orderby i select i;
  55
  56                 List<string> ls = new List<string> (s);
  57
  58                 if (ls [0] != "a")
  59                         return 5;
  60
  61                 if (ls [1] != "aa")
  62                         return 6;
  63
  64                 if (ls [2] != "f")
  65                         return 7;
  66
  67                 if (ls [3] != "z")
  68                         return 7;
  69
  70                 s = from i in string_array orderby i.Length select i;
  71
  72                 // Multiple orderby
  73                 Data[] data = new Data[] {
  74                         new Data { ID = 10, Name = "bcd" },
  75                         new Data { ID = 20, Name = "Abcd" },
  76                         new Data { ID = 20, Name = "Ab" },
  77                         new Data { ID = 10, Name = "Zyx" }
  78                 };
  79
  80                 var de = from i in data orderby i.ID ascending, i.Name descending select i;
  81
  82                 List<Data> ld = new List<Data> (de);
  83                 if (ld [0].Name != "Zyx")
  84                         return 10;
  85
  86                 var de2 = from i in data orderby i.ID descending, i.Name ascending select i;
  87                 ld = new List<Data> (de2);
  88                 if (ld [0].Name != "Ab")
  89                         return 11;
  90
  91                 var de3 = from i in data
  92                         where i.ID == 10
  93                         orderby i.ID descending, i.Name ascending select i;
  94                 ld = new List<Data> (de3);
  95                 if (ld [0].Name != "bcd")
  96                         return 12;
  97
  98                 var de4 = from i in data
  99                         where i.ID == 20
 100                         orderby i.Name group i by i.Name;
 101
 102                 var group_order = new List<IGrouping<string, Data>> (de4);
 103                 ld = new List<Data>(group_order [0]);
 104
 105                 if (ld [0].Name != "Ab")
 106                         return 13;
 107
 108                 ld = new List<Data>(group_order [1]);
 109                 if (ld [0].Name != "Abcd")
 110                         return 14;
 111
 112                 Console.WriteLine ("OK");
 113                 return 0;
 114         }
 115 }