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https://github.com/geeklearningio/Testavior

Testavior is a lightweight solution to help you develop Behavior Tests for ASP.NET Core
https://github.com/geeklearningio/Testavior

aspnet aspnetcore devops dotnet dotnet-core testing

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Testavior is a lightweight solution to help you develop Behavior Tests for ASP.NET Core

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[![NuGet Version](http://img.shields.io/nuget/v/GeekLearning.Testavior.svg?style=flat-square&label=NuGet:%20Testavior)](https://www.nuget.org/packages/GeekLearning.Testavior/)
[![NuGet Version](http://img.shields.io/nuget/v/GeekLearning.Testavior.Configuration.svg?style=flat-square&label=NuGet:%20Testavior.Configuration)](https://www.nuget.org/packages/GeekLearning.Testavior.Configuration/)
[![Build Status](https://geeklearning.visualstudio.com/_apis/public/build/definitions/f841b266-7595-4d01-9ee1-4864cf65aa73/62/badge)](#)
# Testavior
*Testavior* is a [lightweight solution](https://www.nuget.org/packages?q=Testavior) to help you develop **Behavior** Tests for **ASP.NET Core**.

>Behavior Tests are a way of testing your application features applying different types of behaviors to cover a **functional scenario**.

It provides a simple and efficient approach to write automated tests for your ASP.NET Core application.
For more information about *Behavior Testing* with ASP.NET Core, please take a look here http://geeklearning.io/a-different-approach-to-test-your-asp-net-core-application

### Features
*Testavior* provides 2 libraries:
* **Testavior.Configuration**: Helps you configure your application to easily integrate behavior tests for your scenarios.
* **Testavior**: Provides a featured and highly configurable test environment for your behavior tests:
* Configured Test WebHost
* Configured authentication context
* Test authentication middleware
* Configurable test identity
* Identity claims helper
* Configured Entity Framework Core context using SQLite provider
* Serialization helper to handle URL encoded content
* Set of HTTP tools to handle *CSRF* protection (very useful to test edition scenarios)
* Assertion helper

### Installation
On your ASP.NET Core project
* Install the **GeekLearning.Testavior.Configuration** nuget package
```
> dotnet add package GeekLearning.Testavior.Configuration
```

On your .NET Core Unit Test project
* Install the **GeekLearning.Testavior** nuget package
```
> dotnet add package GeekLearning.Testavior
```
* Add your ASP.NET Core web project as a project reference
### Configuration
The Test environment provided by *Testavior* is based on a **Startup Configuration Service** that let you separate the **Production** environment configuration from the **Test** environment configuration.
This configuration service is represented by a contract `IStartupConfigurationService` which define 3 methods: `Configure` - `ConfigureEnvironment - ConfigureService` that have to be called within the **Startup Routine** to inject environment dependent configuration.

1 - In your **ASP.NET Core** project:
* Add a `StartupConfigurationService` class (change name if you wish) to your web project.
* Implement the `IStartupConfigurationService` interface (optionally, inherit from `DefaultStartupConfigurationService` to use the default empty implementation)
* Implement the configuration specific to the Production environment and which must not be executed in the Test environment:
* `ConfigureServices`: implement the configuration options that are specific to the Production environment
* `Configure`: implement the *middleware* configuration specific to the Production environment
* `ConfigureEnvironment`: implement what has to be executed before anything

Sample:
```csharp
public class StartupConfigurationService : DefaultStartupConfigurationService
{
public override void ConfigureServices(IServiceCollection services, IConfigurationRoot configuration)
{
base.ConfigureServices(services, configuration);

var connection = "CONNECTION_STRING";

services.AddDbContext<[EF_DB_CONTEXT]>(options =>
options.UseSqlServer(connection));
}
}
```

2 - In your **Program** class:
Inject your `StartupConfigurationService` by calling the `ConfigureStartup` method on your `WebHostBuilder`:
```csharp
new WebHostBuilder()
...
.UseStartup()
.ConfigureStartup()
```

3 - In your `Startup` class:
* Inject the `IStartupConfigurationService` interface into the `Startup` class
* Call the `ConfigureEnvironment` method at the end of the `Startup` constructor
* Call the `ConfigureServices` method at the end of the original `Startup.ConfigureServices` method
* Call the `Configure` method at the beginning of the original `Startup.Configure` method

Sample:
```csharp
public class Startup
{
private IStartupConfigurationService externalStartupConfiguration;

public Startup(IHostingEnvironment env, IStartupConfigurationService externalStartupConfiguration = null)
{
this.externalStartupConfiguration = externalStartupConfiguration;
this.externalStartupConfiguration.ConfigureEnvironment(env);
}

public void ConfigureServices(IServiceCollection services)
{
services.AddMvc()

// Pass configuration (IConfigurationRoot) to the configuration service if needed
this.externalStartupConfiguration.ConfigureServices(services, null);
}

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
this.externalStartupConfiguration.Configure(app, env, loggerFactory);

app.UseMvc();
}
}
```

4 - In your test project file:
The **Razor** engine uses dependency files (.deps.json) to resolve some references at runtime. So in order to test the **MVC** part of a application, it is necessary to import these files. To do it, add the following section to your `.csproj`:
```xml



```

5 - For **xUnit** users
If you intend to use xUnit, first follow the [official documention](https://xunit.github.io/docs/getting-started-dotnet-core), then add a `xunit.runner.json` file to your test project:
```json
{
"shadowCopy": false
}
```
and add the following section to your `.csproj`:
```xml

```

### Writing Tests
A specific `IStartupConfigurationService` is required for the **Test** environment if you want to implement **Test Specific** configuration.
*Testavior* comes with a test specific `IStartupConfigurationService` implementation: `TestStartupConfigurationService` which provide a **Test Environment** full of useful features (see **Features** section).
Of course you can implement your own Startup configuration service (by using the onboard `TestStartupConfigurationService` or not).

To create a *Test Environment*, just instanciate the `TestEnvironment` class by passing it your ASP.NET Core application `Startup`, your `IStartupConfigurationService` implementation, the type of your EF Core ObjectContext and the relative path to your ASP.NET Core project (required to resolve MVC views).
```csharp
var testEnvironment = new TestEnvironment>(
Path.Combine(System.AppContext.BaseDirectory, @"[PATH_TO_WEB_APP]"));
```

#### API Test
Write your API test by just sending web requests using the *Test Environment*:
```csharp
[TestMethod]
public void ScenarioShouldBeOk()
{
var testEnvironment = new TestEnvironment>(
Path.Combine(System.AppContext.BaseDirectory, @"[PATH_TO_WEB_APP]"));

var response = testEnvironment.Client.GetAsync("/api/data").Result;
response.EnsureSuccessStatusCode();

// Test result content
var result = JsonConvert.DeserializeObject(response.Content.ReadAsStringAsync().Result);

Assert.AreEqual("data", result.Data);
}
```

#### MVC Test
Write a MVC test is almost as easy as testing an API except that you might want to test the **Model** returned by the server and not the **View**.
To do that, *Testavior* provides a **ViewModel Repository** that will intercept and store the view's models returned by the server.

You can access to the this repository using the ASP.NET Core dependency injection mechanism:

```csharp
[TestMethod]
public void ScenarioShouldBeOk()
{
var testEnvironment = new TestEnvironment>(
Path.Combine(System.AppContext.BaseDirectory, @"[PATH_TO_WEB_APP]"));

testEnvironment.Client.GetAsync("/").Result.EnsureSuccessStatusCode();

var viewModel = testEnvironment
.ServiceProvider
.GetRequiredService()
.Get<[VIEWMODEL_TYPE]>();

Assert.AreEqual("data", viewModel.Data);
}
```

And feel free to take a look at the [Samples](https://github.com/geeklearningio/gl-dotnet-test-integration/tree/develop/sample) section ;)

Happy testing ! :)