public void negative_cache()
{
const string connectionString = "";
var parser = new DbConnectionStringParser(LoggerBase);
var actualDestination = parser.ExtractDestination(connectionString, out var wasFoundInCache);
wasFoundInCache.Should().BeFalse();
actualDestination.Should().BeNull();
var actualDestination2 = parser.ExtractDestination(connectionString, out var wasFoundInCache2);
wasFoundInCache2.Should().BeTrue();
actualDestination2.Should().BeNull();
}
public void positive_cache()
{
const string connectionString = @"Server=myServerAddress;Database=myDataBase;User Id=myUsername;Password=myPassword";
var parser = new DbConnectionStringParser(LoggerBase);
var actualDestination = parser.ExtractDestination(connectionString, out var wasFoundInCache);
wasFoundInCache.Should().BeFalse();
actualDestination.Should().NotBeNull();
actualDestination.Address.Should().Be("myServerAddress");
actualDestination.Port.Should().BeNull();
var actualDestination2 = parser.ExtractDestination(connectionString, out var wasFoundInCache2);
wasFoundInCache2.Should().BeTrue();
actualDestination2.Should().Be(actualDestination);
}
public void caches_only_first_MaxCacheSize_results()
{
const string validConnectionStringPrefix = @"Server=myServerAddress;Port=";
var parser = new DbConnectionStringParser(LoggerBase);
DbConnectionStringParser.MaxCacheSize.Repeat(i => { VerifyForIndex(i, /* isFirstTime: */ true); });
DbConnectionStringParser.MaxCacheSize.Repeat(i => { VerifyForIndex(i, /* isFirstTime: */ false); });
10.Repeat(i => { VerifyForIndex(DbConnectionStringParser.MaxCacheSize + i, /* isFirstTime: */ true); });
10.Repeat(i => { VerifyForIndex(DbConnectionStringParser.MaxCacheSize + i, /* isFirstTime: */ false); });
void VerifyForIndex(int index, bool isFirstTime)
{
var isValidConnectionString = index % 2 == 0;
var port = 10000 + index;
var connectionString = isValidConnectionString ? validConnectionStringPrefix + (port) : $"{index}";
var actualDestination = parser.ExtractDestination(connectionString, out var wasFoundInCache);
wasFoundInCache.Should().Be(!isFirstTime && index < DbConnectionStringParser.MaxCacheSize);
if (isValidConnectionString)
{
actualDestination.Should().NotBeNull();
actualDestination.Address.Should().Be("myServerAddress");
actualDestination.Port.Should().Be(port);
}
else
{
actualDestination.Should().BeNull();
}
}
}
internal static void TestImpl(IApmLogger logger, string dbgDescription, string connectionString, string expectedHost
, int?expectedPort
)
{
var dbgInfo = $"connectionString: `{connectionString}'. dbgDescription: {dbgDescription}.";
var parser = new DbConnectionStringParser(logger);
var actualDestination = parser.ExtractDestination(connectionString);
actualDestination.Should().NotBeNull(dbgInfo);
actualDestination.Address.Should().Be(expectedHost, dbgInfo);
actualDestination.Port.Should().Be(expectedPort, dbgInfo);
}
internal static void InvalidValueTestImpl(string dbgDescription, string connectionString, string invalidPart)
{
var mockLogger = new TestLogger(LogLevel.Trace);
var dbgInfo = $"connectionString: `{connectionString}'. dbgDescription: {dbgDescription}.";
var parser = new DbConnectionStringParser(mockLogger);
parser.ExtractDestination(connectionString).Should().BeNull(dbgInfo);
mockLogger.Lines.Should()
.Contain(line =>
line.Contains(nameof(DbConnectionStringParser)) &&
line.Contains(connectionString) &&
line.Contains(invalidPart), dbgInfo);
}