public void TryGetConnectionString_NotFound()
{
string key = "ConnectionStrings_Accounts-MongoDb_nonexistant";
IConnectionStringProvider provider = new EnvironmentVariableConnectionStringProvider(key);
bool result = provider.TryGetConnectionString(out string outConnection);
Assert.False(result, "The connection string should not be found.");
Assert.Null(outConnection);
}
public void TryGetConnectionString()
{
string key = "ConnectionStrings_Accounts-MongoDb";
string connString = "mongodb://some-mongo-instance:27017/some-db";
Environment.SetEnvironmentVariable(key, connString);
IConnectionStringProvider provider = new EnvironmentVariableConnectionStringProvider(key);
bool result = provider.TryGetConnectionString(out string outConnection);
Assert.True(result, "Environment variable not found");
Assert.Equal(outConnection, connString);
}
private static IConnectionStringProvider ParseConnectionStringProvider(
JsonNode node,
IFilePathMapper pathMapper,
Func <IJsonNode, IConnectionStringProvider> connectionStringProviderOverride)
{
if (node.AsObject == null)
{
return(new StaticConnectionStringProvider(node.Value));
}
IConnectionStringProvider provider = connectionStringProviderOverride?.Invoke(node);
if (provider != null)
{
return(provider);
}
JsonClass objClass = node.AsObject;
if (!Enum.TryParse(objClass["locator"]?.Value, out SupportedConnectionStringLocators locator))
{
throw new NAMEException($"The locator {objClass["locator"]?.Value} is not supported.", NAMEStatusLevel.Warn);
}
string key;
switch (locator)
{
#if NET45
case SupportedConnectionStringLocators.ConnectionStrings:
key = objClass["key"]?.Value;
provider = new ConnectionStringsConnectionStringProvider(key);
break;
case SupportedConnectionStringLocators.AppSettings:
key = objClass["key"]?.Value;
provider = new AppSettingsConnectionStringProvider(key);
break;
case SupportedConnectionStringLocators.VSSettingsFile:
key = objClass["key"]?.Value;
string section = objClass["section"]?.Value;
if (string.IsNullOrEmpty(section))
{
throw new ArgumentNullException("section", "The section must be specified.");
}
provider = new VisualStudioSetingsFileConnectionStringProvider(section, key);
break;
#endif
case SupportedConnectionStringLocators.JSONPath:
{
key = objClass["expression"]?.Value;
string file = objClass["file"]?.Value;
if (string.IsNullOrEmpty(file))
{
throw new ArgumentNullException("file", "The file must be specified.");
}
provider = new JsonPathConnectionStringProvider(pathMapper.MapPath(file), key);
}
break;
case SupportedConnectionStringLocators.XPath:
{
key = objClass["expression"]?.Value;
string file = objClass["file"]?.Value;
if (string.IsNullOrEmpty(file))
{
throw new ArgumentNullException("file", "The file must be specified.");
}
provider = new XpathConnectionStringProvider(pathMapper.MapPath(file), key);
break;
}
case SupportedConnectionStringLocators.EnvironmentVariable:
{
key = objClass["key"]?.Value;
provider = new EnvironmentVariableConnectionStringProvider(key);
}
break;
default:
throw new NAMEException($"The locator {locator.ToString()} is not supported.", NAMEStatusLevel.Warn);
}
if (string.IsNullOrEmpty(key))
{
throw new ArgumentNullException($"The connection string key/expression must be specified.");
}
return(provider);
}
