public void CanCompareCollections()
{
var ints = new[] { 1, 2, 3 };
var otherInts = new[] { 4, 5, 6 };
var longerInts = new[] { 1, 2, 3, 4 };
var strings = new[] { "hello", "bonjour", "guten tag", "你好", "aloha" };
var otherStrings = new[] { "good bye", "au revoir", "auf wiedersehen", "再見", "aloha" };
var intComparer = new ModelComparer <int[]>();
var stringComparer = new ModelComparer <string[]>();
// We have to use Assert.True/False instead of .Equal/.NotEqual or we won't actually exercise the ModelComparer's collection handling.
// Also, we use deep copies for some comparisons to make sure the ModelComparer isn't falling back on reference equality.
Assert.True(intComparer.Equals(ints, ints));
Assert.True(stringComparer.Equals(strings, strings));
Assert.True(intComparer.Equals(ints, (int[])ints.Clone()));
Assert.True(stringComparer.Equals((string[])strings.Clone(), strings));
Assert.False(intComparer.Equals(ints, otherInts));
Assert.False(stringComparer.Equals(otherStrings, strings));
Assert.False(intComparer.Equals(ints, new[] { 7 }));
Assert.False(stringComparer.Equals(new[] { "who?" }, strings));
// Test collections of varying lengths.
Assert.False(intComparer.Equals(ints, longerInts));
Assert.False(intComparer.Equals(longerInts, ints));
}
public void NullEqualsEmptyCollection()
{
IEnumerable <int> nullCollection = null;
var emptyArray = new int[0];
var emptyList = new List <int>();
var comparer = new ModelComparer <IEnumerable <int> >();
Assert.True(comparer.Equals(nullCollection, emptyArray));
Assert.True(comparer.Equals(emptyArray, nullCollection));
Assert.True(comparer.Equals(nullCollection, emptyList));
Assert.True(comparer.Equals(emptyList, nullCollection));
}
public void CanCompareDictionaries()
{
var x = new Dictionary <string, double>()
{
{ "pi", 3.14 }, { "e", 2.718 }
};
var notX = new Dictionary <string, double>()
{
{ "m", 13.3 }, { "v", 77 }
};
var y = new Dictionary <string, object>()
{
{ "a", "test" }, { "b", "test2" }
};
var notY = new Dictionary <string, object>()
{
{ "w", "other" }, { "u", "side" }
};
var doubleComparer = new ModelComparer <Dictionary <string, double> >();
var stringComparer = new ModelComparer <Dictionary <string, object> >();
// We have to use Assert.True/False instead of .Equal/.NotEqual or we won't actually exercise the ModelComparer's collection handling.
// Also, we use deep copies for some comparisons to make sure the ModelComparer isn't falling back on reference equality.
Assert.True(doubleComparer.Equals(x, x));
Assert.True(stringComparer.Equals(y, y));
Assert.True(doubleComparer.Equals(x, new Dictionary <string, double>(x)));
Assert.True(stringComparer.Equals(new Dictionary <string, object>(y), y));
Assert.False(doubleComparer.Equals(x, notX));
Assert.False(stringComparer.Equals(notY, y));
Assert.False(doubleComparer.Equals(x, new Dictionary <string, double>()
{
{ "r", 12.0 }
}));
Assert.False(stringComparer.Equals(new Dictionary <string, object>()
{
{ "c", "other" }
}, y));
}
public void CanCompareDifferentEnumerableTypes()
{
var intArray = new[] { 1, 2, 3 };
var intList = new List <int>()
{
1, 2, 3
};
var intComparer = new ModelComparer <IEnumerable <int> >();
// We have to use Assert.True/False instead of .Equal/.NotEqual or we won't actually exercise the ModelComparer's collection handling.
Assert.True(intComparer.Equals(intArray, intList));
}
public void IEquatableTakesPrecedenceOverIEnumerable()
{
var ints = new BiasedList(1, 2, 3);
var odds = new BiasedList(1, 3, 5);
var evens = new BiasedList(2, 4, 6);
var comparer = new ModelComparer <BiasedList>();
Assert.True(comparer.Equals(ints, ints));
Assert.True(comparer.Equals(ints, new BiasedList(ints)));
// ints and odds should compare as equal because BiasedList only looks at the first element.
Assert.True(comparer.Equals(odds, ints));
Assert.True(comparer.Equals(new BiasedList(odds), ints));
Assert.False(comparer.Equals(ints, evens));
Assert.False(comparer.Equals(ints, new BiasedList(evens)));
}