/// <summary>
/// Specifies whether this comparer expects to compare keys or
/// values.
/// </summary>
/// <returns>
/// <b>true</b> iff all the underlying compares implement the
/// <see cref="IEntryAwareComparer"/> interface and all
/// <code>IsKeyComparator()</code> calls return <b>true</b>.
/// </returns>
public bool IsKeyComparer()
{
IComparer[] comparers = Comparers;
for (int i = 0, c = comparers.Length; i < c; i++)
{
if (!SafeComparer.IsKeyComparer(comparers[i]))
{
return(false);
}
}
return(true);
}
public void TestInverseComparer()
{
InverseComparer ic1 = new InverseComparer();
InverseComparer ic2 = new InverseComparer();
Assert.IsNotNull(ic1);
Assert.AreEqual(ic1, ic2);
Assert.AreEqual(ic1.ToString(), ic2.ToString());
Assert.AreEqual(ic1.GetHashCode(), ic2.GetHashCode());
InverseComparer ic3 = new InverseComparer(IdentityExtractor.Instance);
Assert.AreNotEqual(ic1, ic3);
Assert.IsNotNull(ic3.Comparer);
Assert.AreEqual(ic3.Comparer, IdentityExtractor.Instance);
Assert.AreEqual(ic1.Compare(null, null), 0);
Assert.AreEqual(ic1.Compare(new object(), null), -1);
Assert.AreEqual(ic1.Compare(null, new object()), 1);
try
{
Assert.AreEqual(ic1.Compare(new object(), new object()), 0);
}
catch (Exception e)
{
Assert.IsInstanceOf(typeof(ArgumentException), e);
}
SafeComparer sc = new SafeComparer(IdentityExtractor.Instance);
Assert.AreEqual(ic1.Compare(10, 100), 1);
Assert.AreEqual(ic3.Compare(10, 100), -sc.Compare(10, 100));
TestQueryCacheEntry entry1 = new TestQueryCacheEntry("k2", "aaa");
TestQueryCacheEntry entry2 = new TestQueryCacheEntry("k1", "zzz");
ic3 = new InverseComparer(IdentityExtractor.Instance);
sc = new SafeComparer(IdentityExtractor.Instance);
Assert.AreEqual(ic3.CompareEntries(entry2, entry1), -1);
Assert.AreEqual(ic3.CompareEntries(entry2, entry1), -sc.CompareEntries(entry2, entry1));
InverseComparer ic4 = new InverseComparer(new KeyExtractor("Key"));
Assert.AreEqual(ic4.Compare(entry1, entry2), -1);
}
public void TestSafeComparer()
{
SafeComparer sc1 = new SafeComparer();
SafeComparer sc2 = new SafeComparer();
Assert.IsNotNull(sc1);
Assert.AreEqual(sc1, sc2);
Assert.AreEqual(sc1.ToString(), sc2.ToString());
Assert.AreEqual(sc1.GetHashCode(), sc2.GetHashCode());
SafeComparer sc3 = new SafeComparer(IdentityExtractor.Instance);
Assert.AreNotEqual(sc1, sc3);
Assert.IsNotNull(sc3.Comparer);
Assert.AreEqual(sc3.Comparer, IdentityExtractor.Instance);
Assert.AreEqual(sc1.Compare(null, null), 0);
Assert.AreEqual(sc1.Compare(new object(), null), 1);
Assert.AreEqual(sc1.Compare(null, new object()), -1);
try
{
Assert.AreEqual(sc1.Compare(new object(), new object()), 0);
}
catch (Exception e)
{
Assert.IsInstanceOf(typeof(ArgumentException), e);
}
Assert.AreEqual(sc1.Compare(10, 100), -1);
Assert.AreEqual(sc3.Compare(10, 100), -1);
TestQueryCacheEntry entry1 = new TestQueryCacheEntry("k2", "ana");
TestQueryCacheEntry entry2 = new TestQueryCacheEntry("k1", "cana");
sc3 = new SafeComparer(IdentityExtractor.Instance);
Assert.AreEqual(sc3.CompareEntries(entry2, entry1), 1);
IComparer c = new Comparer(CultureInfo.CurrentCulture);
sc3 = new SafeComparer(c);
Assert.AreEqual(sc3.CompareEntries(entry1, entry2), -1);
}