/// <summary>
/// If the given munger returns the same value for all the given
/// songs, then return that value. Otherwise, return an empty string.
/// </summary>
/// <param name="songs">The list of songs to be considered</param>
/// <param name="munger">The munger which will extract the value</param>
/// <returns>The common value or an empty string</returns>
private string GetCommonValue(IList <Song> songs, Munger munger)
{
if (songs.Count == 0 || songs.Count > 1000)
{
return("");
}
string value = (string)munger.GetValue(songs[0]);
for (int i = 1; i < songs.Count; i++)
{
if (value != (string)munger.GetValue(songs[i]))
{
return("");
}
}
return(value);
}
public void Test_GetValue_DottedAspect_NullMidResult() {
// Arrange
TestBaseClass instance = new TestBaseClass();
Munger munger = new Munger("This.NullProperty.ToUpperInvariant");
// Act
object value = munger.GetValue(instance);
// Assert
Assert.IsNull(value);
}
public void Test_GetValue_DottedAspect_NullMidResult()
{
// Arrange
TestBaseClass instance = new TestBaseClass();
Munger munger = new Munger("This.NullProperty.ToUpperInvariant");
// Act
object value = munger.GetValue(instance);
// Assert
Assert.IsNull(value);
}
public void Test_GetValue_VirtualProperty_CalledOnBaseClass() {
// Arrange
TestBaseClass instance = new TestSubClass();
string testValue = "some test value";
instance.VirtualTestProperty = testValue;
Munger munger = new Munger("VirtualTestProperty");
// Act
string value = munger.GetValue(instance) as string;
// Assert
Assert.AreEqual(testValue, value);
}
public void Test_GetValue_DottedAspect_Success() {
// Arrange
TestBaseClass instance = new TestBaseClass();
string testValue = "1234567890";
instance.VirtualTestProperty = testValue;
Munger munger = new Munger("This.VirtualTestProperty.ToUpperInvariant.Length");
// Act
object value = munger.GetValue(instance);
// Assert
Assert.AreEqual(testValue.Length, value);
}
public void Test_GetValue_DottedAspect_UnknownAspect() {
// Arrange
TestBaseClass instance = new TestBaseClass();
string testValue = "1234567890";
instance.VirtualTestProperty = testValue;
Munger munger = new Munger("This.VirtualTestProperty.UnknownProperty.Length");
// Act
object value = munger.GetValue(instance);
// Assert
string errorMsg = "'UnknownProperty' is not a parameter-less method, property or field of type 'System.String'";
Assert.AreEqual(errorMsg, value);
}
public void Test_GetValue_NonVirtualProperty_CalledOnSubClass()
{
// Arrange
TestSubClass instance = new TestSubClass();
string testValue = "some test value";
instance.NonVirtualTestProperty = testValue;
Munger munger = new Munger("NonVirtualTestProperty");
// Act
string value = munger.GetValue(instance) as string;
// Assert
Assert.AreEqual(testValue, value);
}
public void Test_GetValue_VirtualPropertyOnBaseClass()
{
// Arrange
TestBaseClass instance = new TestBaseClass();
string testValue = "some test value";
instance.VirtualTestProperty = testValue;
Munger munger = new Munger("VirtualTestProperty");
// Act
object value = munger.GetValue(instance);
// Assert
Assert.AreEqual(testValue, value);
}
public void Test_GetValue_DottedAspect_Success()
{
// Arrange
TestBaseClass instance = new TestBaseClass();
string testValue = "1234567890";
instance.VirtualTestProperty = testValue;
Munger munger = new Munger("This.VirtualTestProperty.ToUpperInvariant.Length");
// Act
object value = munger.GetValue(instance);
// Assert
Assert.AreEqual(testValue.Length, value);
}
public void Test_GetValue_DottedAspect_UnknownAspect()
{
// Arrange
TestBaseClass instance = new TestBaseClass();
string testValue = "1234567890";
instance.VirtualTestProperty = testValue;
Munger munger = new Munger("This.VirtualTestProperty.UnknownProperty.Length");
// Act
object value = munger.GetValue(instance);
// Assert
string errorMsg = "'UnknownProperty' is not a parameter-less method, property or field of type 'System.String'";
Assert.AreEqual(errorMsg, value);
}