asp: ConfigurationManager of Unit Testing

When using a. NET profile with ConfigurationManager, you can add a configuration file for unit testing, although it can be tested but not decoupled. Using Iconfigurationmanager and Configurationmanagerwrapper to fit the ConfigurationManager is a better way to Configurationmanagerwrapper provides implementations of the. NET configuration file, and if you need to support additional configurations, create a different implementation class for the Iconfigurationmanager interface.

1. Defining the Iconfigurationmanager interface

The code that originally relied on configurationmanager now relies on Iconfigurationmanager. A mock that can be handy during unit testing.

 Public Interface iconfigurationmanager{    get;}     Get ; }     Object GetSection (string  sectionname);}

2. Create an adaptation class Configurationmanagerwrapper

Non-unit test environments use Configurationmanagerwrapper as the default implementation of Iconfigurationmanager.

 Public classconfigurationmanagerwrapper:iconfigurationmanager{ PublicNameValueCollection AppSettings {Get        {            returnconfigurationmanager.appsettings; }    }     Publicconnectionstringsettingscollection ConnectionStrings {Get        {            returnconfigurationmanager.connectionstrings; }    }     Public ObjectGetSection (stringsectionname) {        returnconfigurationmanager.getsection (sectionname); }}

3. Custom generic Configuration Interface

When our code needs to use configuration, you can consider creating a generic generic interface or using a dedicated, strongly typed interface. This demonstrates the use of a common interface.

 Public Interface iconfiguration{    t Get<T> (string  key, T @default);}

4. Implement the generic interface configuration interface. NET configuration file version

Appconfigadapter does not use ConfigurationManager directly but relies on the Iconfigurationmanager interface.

 Public classappconfigadapter:iconfiguration{PrivateIconfigurationmanager _configurationmanager;  PublicAppconfigadapter (Iconfigurationmanager configurationmanager) { This. _configurationmanager =ConfigurationManager; }     PublicT get<t> (stringNodeName, T @default) {        varValue = This. _configurationmanager.appsettings[nodename]; returnValue = =NULL? @default: (T) Convert.changetype (value,typeof(T)); }}

5. Unit test the implementation of the generic configuration interface

Use the most popular unit test framework and Mock Class Library: XUNIT+MOQ for unit testing.

 Public classappconfigadaptertest{[Fact] Public voidgetstringtest () {varKey ="Key"; varValue ="value"; varConfiguration =NewAppconfigadapter ( This. Getconfigurationmanager (o =O.add (key, value.        ToString ())); Assert.equal (configuration. Get (Key,string.    Empty), value); } [Fact] Public voidgetinttest () {varKey ="Key"; varValue =1; varConfiguration =NewAppconfigadapter ( This. Getconfigurationmanager (o =O.add (key, value.        ToString ())); Assert.equal (configuration. Get (Key,int.    MinValue), value); } [Fact] Public voidgetbooltest () {varKey ="Key"; varValue =true; varConfiguration =NewAppconfigadapter ( This. Getconfigurationmanager (o =O.add (key, value.        ToString ())); Assert.equal (configuration. Get (Key,false), value); } [Fact] Public voidgetdatetimetest () {varKey ="Key"; varValue =DateTime.Parse (DateTime.Now.ToString ()); varConfiguration =NewAppconfigadapter ( This. Getconfigurationmanager (o =O.add (key, value.        ToString ())); Assert.equal (configuration.    Get (Key, Datetime.minvalue), value); } [Fact] Public voidgetdecimaltest () {varKey ="Key"; varValue =1.1m; varConfiguration =NewAppconfigadapter ( This. Getconfigurationmanager (o =O.add (key, value.        ToString ())); Assert.equal (configuration. Get (Key,decimal.    MinValue), value); }    PrivateIconfigurationmanager Getconfigurationmanager (action<namevaluecollection>Set)    {        varAppSettings =NewNameValueCollection (); Set(appSettings); varConfigurationManager =NewMock<iconfigurationmanager>(); Configurationmanager.setup (o=o.appsettings).        Returns (appSettings); returnConfigurationmanager.object; }}

6. Summary

Converts code that relies on ConfigurationManager static classes to a dependent Iconfigurationmanager interface, and the runtime injects Configurationmanagerwrapper implementation classes. A mock Iconfigurationmanager object is used when unit tests are simulated.

asp: ConfigurationManager of Unit Testing