
using Xunit;
using Xunit;
using System;
using System.Collections.Generic;
using System.IO;

namespace ConsoleApp {
    public class ProgramTests {
        [Xunit.Fact(DisplayName = "Header row displays 'Product' and 'Price' in separate columns")] 
        public void HeaderRow_DisplaysCorrectColumns() {
            var sw = new StringWriter();
            Console.SetOut(sw);
            var products = new List<string> { "Apple", "Banana" };
            var prices = new List<decimal> { 1.0m, 2.0m };
            Program.PrintProductTable(products, prices);
            string output = sw.ToString();
            Assert.Contains("Product", output);
            Assert.Contains("Price", output);
            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }
        [Xunit.Fact(DisplayName = "Product names are left-aligned and prices are right-aligned as currency with two decimal places")]
        public void Row_AlignmentsAndCurrencyFormat() {
            var sw = new StringWriter();
            Console.SetOut(sw);
            var products = new List<string> { "Apple", "Banana" };
            var prices = new List<decimal> { 1.5m, 2.25m };
            Program.PrintProductTable(products, prices);
            string output = sw.ToString();
            var lines = output.Split('\\n');
            Assert.Contains("Apple", lines[2]);
            Assert.Contains("Banana", lines[3]);
            Assert.Contains("1.50", lines[2]);
            Assert.Contains("2.25", lines[3]);
            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }
        [Xunit.Fact(DisplayName = "Product column width matches longest product name plus extra padding")]
        public void ProductColumn_MatchesLongestNamePlusPadding() {
            var sw = new StringWriter();
            Console.SetOut(sw);
            var products = new List<string> { "A", "LongProductName" };
            var prices = new List<decimal> { 1.0m, 2.0m };
            Program.PrintProductTable(products, prices);
            string output = sw.ToString();
            var lines = output.Split('\\n');
            int productColWidth = lines[0].IndexOf('|');
            Assert.True(productColWidth >= "LongProductName".Length + 2, "Product column is not wide enough for longest name plus padding");
            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }
        [Xunit.Fact(DisplayName = "Table includes a separator line under the header")]
        public void Table_IncludesSeparatorLine() {
            var sw = new StringWriter();
            Console.SetOut(sw);
            var products = new List<string> { "Apple" };
            var prices = new List<decimal> { 1.0m };
            Program.PrintProductTable(products, prices);
            string output = sw.ToString();
            var lines = output.Split('\\n');
            Assert.Contains("-", lines[1]);
            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }
        [Xunit.Fact(DisplayName = "Each product and price pair is displayed on its own row")]
        public void EachProductPricePair_OnOwnRow() {
            var sw = new StringWriter();
            Console.SetOut(sw);
            var products = new List<string> { "Apple", "Banana", "Milk" };
            var prices = new List<decimal> { 0.99m, 0.59m, 1.19m };
            Program.PrintProductTable(products, prices);
            string output = sw.ToString();
            var lines = output.Split('\\n');
            Assert.Contains("Apple", lines[2]);
            Assert.Contains("Banana", lines[3]);
            Assert.Contains("Milk", lines[4]);
            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }
    }
}

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: Table Formatter

解答