public void ContainsKeyTest()
 {
     for (int y = 1900; y < 2123; y++) {
         var yzd = new YearlyZmanimDictionary(y, CreateZmanim(y));
         Assert.IsTrue(yzd.ContainsKey(new DateTime(y, 2, 28)));
         Assert.IsTrue(yzd.ContainsKey(new DateTime(y, 10, 28)));
         Assert.IsFalse(yzd.ContainsKey(new DateTime(y - 1, 2, 28)));
     }
 }
 public void ContainsKeyTest()
 {
     for (int y = 1900; y < 2123; y++)
     {
         var yzd = new YearlyZmanimDictionary(y, CreateZmanim(y));
         Assert.IsTrue(yzd.ContainsKey(new DateTime(y, 2, 28)));
         Assert.IsTrue(yzd.ContainsKey(new DateTime(y, 10, 28)));
         Assert.IsFalse(yzd.ContainsKey(new DateTime(y - 1, 2, 28)));
     }
 }