csharp/testa.cs - master - hahahihi/csharpTasks

csharp/testa.cs
79 строк3 KB
belovAndrey
create csharp/testa.cs
26 окт 2025, 18:00
26 окт 2025, 18:00a698695
using NUnit.Framework;

namespace TableParser;

[TestFixture]
public class QuotedFieldTaskTests
{
    [TestCase("''", 0, "", 2)]
    [TestCase("'a'", 0, "a", 3)]
    [TestCase("\"\"", 0, "", 2)]
    [TestCase("\"abc\"", 0, "abc", 5)]
    [TestCase("'a\\'b'", 0, "a'b", 6)]
    [TestCase("\"a\\\"b\"", 0, "a\"b", 6)]
    [TestCase("\"a\\\\b\"", 0, "a\\b", 6)]
    [TestCase("'\\''", 0, "'", 4)]
    [TestCase("\"\\\"\"", 0, "\"", 4)]
    [TestCase("'a b c'", 0, "a b c", 7)]
    [TestCase("\"abc", 0, "abc", 4)]
    [TestCase("'abc", 0, "abc", 4)]
    [TestCase("\"a\\\"b\\\"c\"", 0, "a\"b\"c", 9)] // ← длина 9 — правильно
    [TestCase("'a\\\\b'", 0, "a\\b", 6)]
    [TestCase("\"a'b'c\"", 0, "a'b'c", 7)]
    [TestCase("'a\"b\"c'", 0, "a\"b\"c", 7)]
    public void Test(string line, int startIndex, string expectedValue, int expectedLength)
    {
        var actualToken = QuotedFieldTask.ReadQuotedField(line, startIndex);
        Assert.That(new Token(expectedValue, startIndex, expectedLength), Is.EqualTo(actualToken));
    }
}

public class QuotedFieldTask
{
    public static Token ReadQuotedField(string line, int startIndex)
    {
        if (startIndex >= line.Length)
            return new Token("", startIndex, 0);

        var quote = line[startIndex];
        if (quote != '"' && quote != '\'')
            return new Token("", startIndex, 0);

        var (value, length) = ParseQuotedContent(line, startIndex + 1, quote);
        return new Token(value, startIndex, length);
    }

    private static (string value, int totalLength) ParseQuotedContent(string line, int pos, char quote)
    {
        var value = new System.Text.StringBuilder();
        var i = pos;
        var escaped = false;

        while (i < line.Length)
        {
            var c = line[i];

            if (escaped)
            {
                value.Append(c);
                escaped = false;
            }
            else if (c == '\\')
                escaped = true;
            else if (c == quote)
            {
                // Нашли закрывающую кавычку
                var tokenLength = i - pos + 2; // +2: открывающая и закрывающая кавычки
                return (value.ToString(), tokenLength);
            }
            else
                value.Append(c);

            i++;
        }

        // Кавычка не закрыта — поле до конца строки
        var unclosedLength = i - pos + 1; // +1: только открывающая кавычка учтена в startIndex
        return (value.ToString(), unclosedLength);
    }
}