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using System.Text;
namespace CrupestApi.Commons.Crud.Tests;
public class SqlCompareHelper
{
public static List<string> SqlExtractWords(string? sql, bool toLower = true)
{
var result = new List<string>();
if (string.IsNullOrEmpty(sql))
{
return result;
}
var current = 0;
StringBuilder? wordBuilder = null;
while (current < sql.Length)
{
if (char.IsWhiteSpace(sql[current]))
{
if (wordBuilder is not null)
{
result.Add(wordBuilder.ToString());
wordBuilder = null;
}
}
else if (sql[current] == ';')
{
if (wordBuilder is not null)
{
result.Add(wordBuilder.ToString());
wordBuilder = null;
}
result.Add(";");
}
else
{
if (wordBuilder is not null)
{
wordBuilder.Append(sql[current]);
}
else
{
wordBuilder = new StringBuilder(sql[current]);
}
}
}
if (wordBuilder is not null)
{
result.Add(wordBuilder.ToString());
}
return result;
}
public static bool SqlEqual(string left, string right)
{
return SqlExtractWords(left) == SqlExtractWords(right);
}
[Fact]
public void TestSqlExtractWords()
{
var sql = "SELECT * FROM TableName WHERE id = @abcd;";
var words = SqlExtractWords(sql);
Assert.Equal(words, new List<string> { "select", "*", "from", "tablename", "where", "id", "=", "@abcd", ";" });
}
}
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