public void TestToExpression()
{
// GIVEN necessary arguments
Mock <IParameterProvider <object> > parameterProvider = new Mock <IParameterProvider <object> >();
Expression formatProvider = Expression.Constant(null);
// WHEN the text segment is converted to an expression
TextSegment textSegment = new TextSegment("a string");
Expression result = textSegment.ToExpression(parameterProvider.Object, formatProvider);
// THEN the expression is a constant
Assert.IsInstanceOfType(result, typeof(ConstantExpression));
// AND the expression contains the correct string
Assert.AreEqual("a string", ((ConstantExpression)result).Value);
// AND the parameter provider was not interacted with
parameterProvider.VerifyNoOtherCalls();
}
