public void ReferenceEqualsFailsWhenUsed()
{
var ex = Assert.Throws <InvalidOperationException>(() => FileAssert.ReferenceEquals(string.Empty, string.Empty));
Assert.That(ex.Message, Does.StartWith("FileAssert.ReferenceEquals should not be used for Assertions"));
}
public void TestAssertions()
{
#region Condition assertions
Assert.True(true, "Assert.True and Assert.IsTrue test that the specified condition is true. ");
Assert.IsTrue(true);
Assert.False(false, "Assert.False and Assert.IsFalse test that the specified condition is false.");
Assert.IsFalse(false);
Assert.Null(null);
Assert.IsNull(null, "Assert.Null and Assert.IsNull test that the specified object is null.");
Assert.IsNotNull("10");
Assert.NotNull("10", "");
Assert.IsNaN(Double.NaN, "Assert.IsNaN tests that the specified double value is NaN (Not a number).");
Assert.IsEmpty("");
Assert.IsEmpty(new List <object>());
Assert.IsNotEmpty(new List <object> {
1
});
Assert.IsNotEmpty("MyTestString");
#endregion
#region Equality
Assert.AreEqual(true, true, "Assert.AreEqual tests whether the two arguments are equal.");
Assert.AreNotEqual(true, false);
#endregion
#region Identity
Assert.AreSame(string.Empty, string.Empty,
"Assert.AreNotSame tests that the two arguments do not reference the same object.");
Assert.AreNotSame(new object(), new object());
//both objects are refering to same object
object a = new object();
object b = a;
Assert.AreSame(a, b);
#endregion
#region Comparision
//Contrary to the normal order of Asserts, these methods are designed to be read in the "natural" English-language or mathematical order.
//Thus Assert.Greater(x, y) asserts that x is greater than y (x > y).
Assert.Greater(Decimal.MaxValue, Decimal.MinValue,
"Assert.Greater tests whether one object is greater than than another");
Assert.GreaterOrEqual(Decimal.MinValue, Decimal.MinValue);
Assert.Less(Decimal.MinValue, Decimal.MaxValue);
Assert.LessOrEqual(Decimal.MinValue, Decimal.MinValue);
#endregion
#region Types
Assert.IsInstanceOf <decimal>(decimal.MinValue,
"Assert.IsInstanceOf succeeds if the object provided as an actual value is an instance of the expected type.");
Assert.IsNotInstanceOf <int>(decimal.MinValue);
Assert.IsNotAssignableFrom(typeof(List <Type>), string.Empty,
"Assert.IsAssignableFrom succeeds if the object provided may be assigned a value of the expected type.");
Assert.IsAssignableFrom(typeof(List <decimal>), new List <decimal>());
Assert.IsNotAssignableFrom <List <Type> >(string.Empty);
Assert.IsAssignableFrom <List <decimal> >(new List <decimal>());
#endregion
#region Strings
//The StringAssert class provides a number of methods that are useful when examining string values
StringAssert.Contains("london", "london");
StringAssert.StartsWith("Food", "FoodPanda");
StringAssert.EndsWith("rangers", "Powerrangers");
StringAssert.AreEqualIgnoringCase("DOG", "dog");
StringAssert.IsMatch("[10-29]", "15");
StringAssert.DoesNotContain("abc", "defghijk");
StringAssert.DoesNotEndWith("abc", "abcdefgh");
StringAssert.DoesNotMatch("abc", "def");
string a1 = "abc";
string b1 = "abcd";
//StringAssert.ReferenceEquals(a1, b1); need to debug why it's failing
Assert.Contains(string.Empty, new List <object> {
string.Empty
},
"Assert.Contains is used to test whether an object is contained in a collection.");
#endregion
#region Collections
//The CollectionAssert class provides a number of methods that are useful when examining collections and
//their contents or for comparing two collections. These methods may be used with any object implementing IEnumerable.
//The AreEqual overloads succeed if the corresponding elements of the two collections are equal.
//AreEquivalent tests whether the collection contents are equal, but without regard to order.
//In both cases, elements are compared using NUnit's default equality comparison.
CollectionAssert.AllItemsAreInstancesOfType(new List <decimal> {
0m
}, typeof(decimal));
CollectionAssert.AllItemsAreNotNull(new List <decimal> {
0m
});
CollectionAssert.AllItemsAreUnique(new List <decimal> {
0m, 1m
});
CollectionAssert.AreEqual(new List <decimal> {
0m
}, new List <decimal> {
0m
});
CollectionAssert.AreEquivalent(new List <decimal> {
0m, 1m
},
new List <decimal> {
1m, 0m
}); // Same as AreEqual though order does not mater
CollectionAssert.AreNotEqual(new List <decimal> {
0m
}, new List <decimal> {
1m
});
CollectionAssert.AreNotEquivalent(new List <decimal> {
0m, 1m
},
new List <decimal> {
1m, 2m
}); // Same as AreNotEqual though order does not matter
CollectionAssert.Contains(new List <decimal> {
0m, 1m
}, 1m);
CollectionAssert.DoesNotContain(new List <decimal> {
0m, 1m
}, 2m);
CollectionAssert.IsSubsetOf(new List <decimal> {
1m
},
new List <decimal> {
0m, 1m
}); // {1} is considered a SubSet of {1,2}
CollectionAssert.IsNotSubsetOf(new List <decimal> {
1m, 2m
}, new List <decimal> {
0m, 1m
});
CollectionAssert.IsEmpty(new List <decimal>());
CollectionAssert.IsNotEmpty(new List <decimal> {
1m
});
CollectionAssert.IsOrdered(new List <decimal> {
1m, 2m, 3m
});
CollectionAssert.IsOrdered(new List <string> {
"a", "A", "b"
}, StringComparer.CurrentCultureIgnoreCase);
CollectionAssert.IsOrdered(new List <int> {
3, 2, 1
},
"The list is ordered"); // Only supports ICompare and not ICompare<T> as of version 2.6
#endregion
#region File Assert
//Various ways to compare a stream or file.
//The FileAssert class provides methods for comparing or verifying the existence of files
//Files may be provided as Streams, as FileInfos or as strings giving the path to each file.
FileAssert.AreEqual(new MemoryStream(), new MemoryStream());
FileAssert.AreEqual(new FileInfo("MyFile.txt"), new FileInfo("MyFile.txt"));
FileAssert.AreEqual("MyFile.txt", "MyFile.txt");
FileAssert.AreNotEqual(new FileInfo("MyFile.txt"), new FileInfo("MyFile2.txt"));
FileAssert.AreNotEqual("MyFile.txt", "MyFile2.txt");
FileAssert.AreNotEqual(new FileStream("MyFile.txt", FileMode.Open),
new FileStream("MyFile2.txt", FileMode.Open));
FileAssert.Equals(new FileInfo("MyFile.txt"), new FileInfo("MyFile.txt"));
FileAssert.ReferenceEquals(new FileInfo("MyFile.txt"), new FileInfo("MyFile.txt"));
#endregion
#region Utilities
// Used to stop test execution and mark them pass or fail or skip
if (Convert.ToInt32(DateTime.Now.Second) > 30)
{
Console.WriteLine("Exaple on Utilities assertions");
Assert.Ignore();
}
if (Convert.ToInt32(DateTime.Now.Second) < 30)
{
Assert.Inconclusive();
}
// Defining the failed message
Assert.IsTrue(true, "A failed message here");
Assert.Pass();
Assert.Fail();
#endregion
}
