private static void Main(string[] a)
{
//2. Define the availability-checking function
Func <FeatureSetting <Feature, DefaultTenantEnum>, EmptyArgs, bool> fn =
(f, args) =>
DefaultFunctions.AvailabilityCheckFunction(f,
Tuple.Create(FeatureVisibilityMode.Normal,
DateTime.Now));
//3. Take care of feature manifest initialization
//NOTE: I suggest hiding this ugly initialization logic away in the IOC container configuration
var featureSettingRepo = new AppConfigFeatureSettingRepository <Feature>();
var availabilityChecker = new FeatureSettingAvailabilityChecker <Feature>(fn);
//from step 2
var featureSettingService =
new FeatureSettingService <Feature>(availabilityChecker,
featureSettingRepo);
var manifestCreationStrategy =
new ManifestCreationStrategyDefault <Feature>(featureSettingRepo,
featureSettingService);
//we use the default for this example
var featureManifestService = new FeatureManifestService <Feature>(manifestCreationStrategy);
var featureManifest = featureManifestService.GetManifest();
//4. Configure feature dependencies (see the web.config - we do not specify any dependencies for this demo)
//5. Add code that is conditional on feature availability. featureManifest ideally supplied via IOC container
if (Feature.MyFeature.IsAvailable(featureManifest))
{
Console.WriteLine("MyFeature is available.");
}
else
{
throw new FeatureNotAvailableException(
"MyFeature is not available. This is unexpected behavior for the default implementation of NFeature.Example.Console.",
new[] {
"Check your app.config.", "Ensure built DLLs are up to date.",
"Ensure you have not modified this application or its configuration."
});
}
//6. Optionally configure feature-specific settings using JSON
Console.WriteLine(Feature.MyFeature.Setting(MyFeatureSettings.mySetting, featureManifest));
Console.ReadLine();
//7. Optionally specify dates for feature availability
//8. At some future date optionally mark your feature as
//Established to indicate that it is now integral to your
//application and cannot be turned off (see footnote 2)
//9. ...
//10. Profit!
}
public void Setup() {
var availabilityChecker =
new FeatureSettingAvailabilityChecker<Feature>(MyAvailabilityCheckFunction);
var featureSettingRepo = new AppConfigFeatureSettingRepository<Feature>();
var featureSettingService =
new FeatureSettingService<Feature>(availabilityChecker, featureSettingRepo);
var manifestCreationStrategy =
new ManifestCreationStrategyDefault<Feature>(featureSettingRepo, featureSettingService);
var featureManifestService = new FeatureManifestService<Feature>(manifestCreationStrategy);
_featureManifest = featureManifestService.GetManifest();
}
public void Setup()
{
var availabilityChecker =
new FeatureSettingAvailabilityChecker <Feature>(MyAvailabilityCheckFunction);
var featureSettingRepo = new AppConfigFeatureSettingRepository <Feature>();
var featureSettingService =
new FeatureSettingService <Feature>(availabilityChecker, featureSettingRepo);
var manifestCreationStrategy =
new ManifestCreationStrategyDefault <Feature>(featureSettingRepo, featureSettingService);
var featureManifestService = new FeatureManifestService <Feature>(manifestCreationStrategy);
_featureManifest = featureManifestService.GetManifest();
}
private static void Main(string[] a) {
//2. Define the availability-checking function
Func<FeatureSetting<Feature, DefaultTenantEnum>, EmptyArgs, bool> fn =
(f, args) =>
DefaultFunctions.AvailabilityCheckFunction(f,
Tuple.Create(FeatureVisibilityMode.Normal,
DateTime.Now));
//3. Take care of feature manifest initialization
//NOTE: I suggest hiding this ugly initialization logic away in the IOC container configuration
var featureSettingRepo = new AppConfigFeatureSettingRepository<Feature>();
var availabilityChecker = new FeatureSettingAvailabilityChecker<Feature>(fn);
//from step 2
var featureSettingService =
new FeatureSettingService<Feature>(availabilityChecker,
featureSettingRepo);
var manifestCreationStrategy =
new ManifestCreationStrategyDefault<Feature>(featureSettingRepo,
featureSettingService);
//we use the default for this example
var featureManifestService = new FeatureManifestService<Feature>(manifestCreationStrategy);
var featureManifest = featureManifestService.GetManifest();
//4. Configure feature dependencies (see the web.config - we do not specify any dependencies for this demo)
//5. Add code that is conditional on feature availability. featureManifest ideally supplied via IOC container
if (Feature.MyFeature.IsAvailable(featureManifest)) {
Console.WriteLine("MyFeature is available.");
} else {
throw new FeatureNotAvailableException(
"MyFeature is not available. This is unexpected behavior for the default implementation of NFeature.Example.Console.",
new[] {
"Check your app.config.", "Ensure built DLLs are up to date.",
"Ensure you have not modified this application or its configuration."
});
}
//6. Optionally configure feature-specific settings using JSON
Console.WriteLine(Feature.MyFeature.Setting(MyFeatureSettings.mySetting, featureManifest));
Console.ReadLine();
//7. Optionally specify dates for feature availability
//8. At some future date optionally mark your feature as
//Established to indicate that it is now integral to your
//application and cannot be turned off (see footnote 2)
//9. ...
//10. Profit!
}
IsAvailable_PreviewableAndCookieAvailableAndDependencySettingsMissing_ThrowsException()
{
var fsRepo = new Mock <IFeatureSettingRepository <Feature, Tenant> >();
fsRepo.Setup(
s =>
s.GetFeatureSettings()).Returns(new[] {
new FeatureSetting <Feature, Tenant> {
Feature =
Feature.
TestFeatureA,
FeatureState =
FeatureState.
Previewable,
Dependencies =
new[] {
Feature
.
TestFeatureE
}
},
});
var request = new Mock <HttpRequestBase>();
request.Setup(
s =>
s.Cookies).Returns(new HttpCookieCollection {
new HttpCookie(
ManifestCreationStrategyConsideringStateCookieTenantAndTime
<Feature, Tenant> .
FeaturePreviewCookieName)
});
var httpContext = new Mock <HttpContextBase>();
httpContext.Setup(
s =>
s.Request).Returns(request.Object);
var tenancyContext = new Mock <ITenancyContext <Tenant> >();
tenancyContext.Setup(
s =>
s.CurrentTenant).Returns(Tenant.TenantA);
var fsSvc =
new FeatureSettingService <Feature, Tenant, TArgs>(
new FeatureSettingAvailabilityChecker <Feature, TArgs, Tenant>
(DefaultFunctions.AvailabilityCheckFunction),
fsRepo.Object);
var manifestService =
new FeatureManifestService <Feature>(
new ManifestCreationStrategyConsideringStateCookieTenantAndTime <Feature, Tenant>(fsSvc,
fsRepo.
Object,
httpContext
.Object,
tenancyContext
.Object,
new ApplicationClock
()));
Assert.Throws <FeatureNotConfiguredException <Feature> >(() => manifestService.GetManifest());
}
IsAvailable_PreviewableAndCookieAvailableAndDependencySettingsMissing_ThrowsException() {
var fsRepo = new Mock<IFeatureSettingRepository<Feature, Tenant>>();
fsRepo.Setup(
s =>
s.GetFeatureSettings()).Returns(new[] {
new FeatureSetting<Feature, Tenant> {
Feature =
Feature.
TestFeatureA,
FeatureState =
FeatureState.
Previewable,
Dependencies =
new[] {
Feature
.
TestFeatureE
}
},
});
var request = new Mock<HttpRequestBase>();
request.Setup(
s =>
s.Cookies).Returns(new HttpCookieCollection {
new HttpCookie(
ManifestCreationStrategyConsideringStateCookieTenantAndTime
<Feature, Tenant>.
FeaturePreviewCookieName)
});
var httpContext = new Mock<HttpContextBase>();
httpContext.Setup(
s =>
s.Request).Returns(request.Object);
var tenancyContext = new Mock<ITenancyContext<Tenant>>();
tenancyContext.Setup(
s =>
s.CurrentTenant).Returns(Tenant.TenantA);
var fsSvc =
new FeatureSettingService<Feature, Tenant, TArgs>(
new FeatureSettingAvailabilityChecker<Feature, TArgs, Tenant>
(DefaultFunctions.AvailabilityCheckFunction),
fsRepo.Object);
var manifestService =
new FeatureManifestService<Feature>(
new ManifestCreationStrategyConsideringStateCookieTenantAndTime<Feature, Tenant>(fsSvc,
fsRepo.
Object,
httpContext
.Object,
tenancyContext
.Object,
new ApplicationClock
()));
Assert.Throws<FeatureNotConfiguredException<Feature>>(() => manifestService.GetManifest());
}