public void NotEvenClose()
{
string x = "a";
string y = "It was the best of times, it was the worse of times";
SpookyStringEqualityComparer eq = new SpookyStringEqualityComparer();
Assert.False(eq.Equals(x, y));
Assert.False(eq.Equals(x, y.ToCharArray()));
Assert.False(eq.Equals(x.ToCharArray(), y));
Assert.False(eq.Equals(x.ToCharArray(), y.ToCharArray()));
}
public void ConsistentHash()
{
var x = new SpookyStringEqualityComparer();
var y = new SpookyStringEqualityComparer();
Assert.Equal(x.GetHashCode("abcde"), y.GetHashCode("abcde"));
Assert.Equal(x.GetHashCode("abcde".ToCharArray()), y.GetHashCode("abcde".ToCharArray()));
Assert.Equal(x.GetHashCode("abcde"), y.GetHashCode("abcde".ToCharArray()));
x = new SpookyStringEqualityComparer(0);
y = new SpookyStringEqualityComparer(0);
Assert.Equal(x.GetHashCode("abcde"), y.GetHashCode("abcde"));
Assert.Equal(x.GetHashCode("abcde".ToCharArray()), y.GetHashCode("abcde".ToCharArray()));
Assert.Equal(x.GetHashCode("abcde"), y.GetHashCode("abcde".ToCharArray()));
}
public void ConsistentHash()
{
SpookyStringEqualityComparer x = new SpookyStringEqualityComparer();
SpookyStringEqualityComparer y = new SpookyStringEqualityComparer();
Assert.Equal(x.GetHashCode("abcde"), y.GetHashCode("abcde"));
Assert.Equal(x.GetHashCode("abcde".ToCharArray()), y.GetHashCode("abcde".ToCharArray()));
Assert.Equal(x.GetHashCode("abcde"), y.GetHashCode("abcde".ToCharArray()));
x = new SpookyStringEqualityComparer(0);
y = new SpookyStringEqualityComparer(0);
Assert.Equal(x.GetHashCode("abcde"), y.GetHashCode("abcde"));
Assert.Equal(x.GetHashCode("abcde".ToCharArray()), y.GetHashCode("abcde".ToCharArray()));
Assert.Equal(x.GetHashCode("abcde"), y.GetHashCode("abcde".ToCharArray()));
}
public void SelfEquals()
{
SpookyStringEqualityComparer eq = new SpookyStringEqualityComparer(42);
SpookyStringEqualityComparer eqX = new SpookyStringEqualityComparer(42);
Assert.True(Equals(eq, eqX));
HashSet <SpookyStringEqualityComparer> hset =
new HashSet <SpookyStringEqualityComparer> {
new SpookyStringEqualityComparer()
};
Assert.True(hset.Add(eq));
Assert.False(hset.Add(eqX));
}
public void RollAlong()
{
char[] x = new char[65];
char[] y = new char[65];
SpookyStringEqualityComparer eq = new SpookyStringEqualityComparer();
for (int i = 0; i != x.Length; ++i)
{
x[i] = (char)(i + 'a');
Assert.False(eq.Equals(x, y));
y[i] = (char)(i + 'a');
}
Assert.True(eq.Equals(x, y));
}
public void NullsAndReferencesCorrect()
{
string str = "abcdefg";
char[] arr = "abcdefg".ToCharArray();
SpookyStringEqualityComparer eq = new SpookyStringEqualityComparer();
Assert.True(eq.Equals(arr, arr));
Assert.True(eq.Equals(default(string), default(string)));
Assert.True(eq.Equals(default(string), default(char[])));
Assert.True(eq.Equals(default(char[]), default(string)));
Assert.True(eq.Equals(default(char[]), default(char[])));
Assert.False(eq.Equals(arr, default(char[])));
Assert.False(eq.Equals(default(char[]), arr));
Assert.False(eq.Equals(arr, default(string)));
Assert.False(eq.Equals(default(string), arr));
Assert.False(eq.Equals(default(string), str));
Assert.False(eq.Equals(str, default(string)));
Assert.False(eq.Equals(str, default(char[])));
}
public void NullsAndReferencesCorrect()
{
var str = "abcdefg";
var arr = "abcdefg".ToCharArray();
char[] nulArr = null;
string nulStr = null;
var eq = new SpookyStringEqualityComparer();
Assert.True(eq.Equals(arr, arr));
Assert.True(eq.Equals(nulStr, nulStr));
Assert.True(eq.Equals(nulStr, nulArr));
Assert.True(eq.Equals(nulArr, nulStr));
Assert.True(eq.Equals(nulArr, nulArr));
Assert.False(eq.Equals(arr, nulArr));
Assert.False(eq.Equals(nulArr, arr));
Assert.False(eq.Equals(arr, nulStr));
Assert.False(eq.Equals(nulStr, arr));
Assert.False(eq.Equals(nulStr, str));
Assert.False(eq.Equals(str, nulStr));
Assert.False(eq.Equals(str, nulArr));
}
public void NotEvenClose()
{
string x = "a";
string y = "It was the best of times, it was the worse of times";
var eq = new SpookyStringEqualityComparer();
Assert.False(eq.Equals(x, y));
Assert.False(eq.Equals(x, y.ToCharArray()));
Assert.False(eq.Equals(x.ToCharArray(), y));
Assert.False(eq.Equals(x.ToCharArray(), y.ToCharArray()));
}
public void SelfEquals()
{
var eq = new SpookyStringEqualityComparer(42);
var eqX = new SpookyStringEqualityComparer(42);
Assert.True(object.Equals(eq, eqX));
var hset = new HashSet<SpookyStringEqualityComparer>();
hset.Add(new SpookyStringEqualityComparer());
Assert.True(hset.Add(eq));
Assert.False(hset.Add(eqX));
}
public void RollAlong()
{
var x = new char[65];
var y = new char[65];
var eq = new SpookyStringEqualityComparer();
for(int i = 0; i != x.Length; ++i)
{
x[i] = (char)(i + (int)'a');
Assert.False(eq.Equals(x, y));
y[i] = (char)(i + (int)'a');
}
Assert.True(eq.Equals(x, y));
}
