
using Xunit;
namespace ConsoleApp {
    public class ProgramTests {
        [Fact(DisplayName = "Returns true for palindrome sentence, ignoring spaces, punctuation, and case")] 
        public void IsSentencePalindrome_PalindromeSentence_ReturnsTrue() {
            Assert.True(Program.IsSentencePalindrome("A man, a plan, a canal: Panama"), "Should return true for 'A man, a plan, a canal: Panama'");
            Assert.True(Program.IsSentencePalindrome("Was it a car or a cat I saw?"), "Should return true for 'Was it a car or a cat I saw?'");
            Assert.True(Program.IsSentencePalindrome("Able , was I ere I saw eLba"), "Should return true for 'Able , was I ere I saw eLba'");
            Assert.True(Program.IsSentencePalindrome("No lemon, no melon"), "Should return true for 'No lemon, no melon'");
        }

        [Fact(DisplayName = "Returns false for non-palindrome sentence after cleaning")]
        public void IsSentencePalindrome_NonPalindromeSentence_ReturnsFalse() {
            Assert.False(Program.IsSentencePalindrome("Hello, World!"), "Should return false for 'Hello, World!'");
            Assert.False(Program.IsSentencePalindrome("This is not a palindrome"), "Should return false for 'This is not a palindrome'");
            Assert.False(Program.IsSentencePalindrome("Palindrome? Nope!"), "Should return false for 'Palindrome? Nope!'");
        }

        [Fact(DisplayName = "Handles empty and only non-alphanumeric strings as palindromes")]
        public void IsSentencePalindrome_EmptyAndNonAlpha_ReturnsTrue() {
            Assert.True(Program.IsSentencePalindrome(""), "Should return true for empty string");
            Assert.True(Program.IsSentencePalindrome("!!!   ..."), "Should return true for string with only punctuation and spaces");
        }

        [Fact(DisplayName = "Is case-insensitive and ignores all punctuation and whitespace")]
        public void IsSentencePalindrome_CaseAndPunctuationHandling() {
            Assert.True(Program.IsSentencePalindrome("RaceCar"), "Should return true for 'RaceCar'");
            Assert.True(Program.IsSentencePalindrome("R a c e C a r"), "Should return true for 'R a c e C a r'");
            Assert.True(Program.IsSentencePalindrome("R-A-C-E-C-A-R"), "Should return true for 'R-A-C-E-C-A-R'");
            Assert.True(Program.IsSentencePalindrome("rAcE, cAr!"), "Should return true for 'rAcE, cAr!'");
        }
    }
}

ProgramTests.cs

Master the essentials of string manipulation, text parsing, and efficient text processing in C#. This course guides you from the basics of working with strings to advanced text analysis and formatting, using engaging real-world examples and hands-on challenges.

Explore the basics of strings in C#, including creation, concatenation, and essential properties. Practice manipulating and analyzing text with beginner-friendly challenges.

Advance your skills with string formatting, splitting, trimming, and replacing text. Tackle real-world parsing and formatting tasks.

Apply your string skills to analyze text, check for palindromes, perform frequency analysis, and implement basic ciphers.

Challenge: Palindrome Detector

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