Code-Behind Files

Each test case in Progress® Test Studio® for APIs can have a corresponding code-behind file. The code-behind file will be automatically added when a coded step is added to the test or you can explicitly create it with the "Add Code-Behind" option in the test's context menu in the project explorer.

If this is the first time you are adding a code-behind file to this project, you will be prompted to select a coding language for the project (C# or Visual Basic).

Code-behind files are generated with a default empty test method where you can implement your custom code. You can rename this method, if preferred, or delete it and add your custom test methods. Each code behind class can contain multiple test methods.

See the Coded Steps article which describes how to execute the code in a test method. In order to be able to execute a test method from a coded step, the methods need to be defined as public and should require no parameters. One test method can be referenced by more than one coded step.

Multiple Classes in a Code-Behind File

You can also implement multiple test classes in a single code-behind file but only one of them can be associated to a test case and its methods be directly executed by the test's coded steps. Any additional classes in the code-behind file can be referenced by the primary class, but their methods cannot be directly executed by coded steps.

Map Test Case to Code-Behind Class

When a code-behind file is added to a test, the default class is associated to the test (via the test's "ClassName" property). The new class will be named according to the name of the test case, but empty spaces will be removed and any invalid character will be replaced with a underscore ("_").

If you change the default name of a test's code-behind class or if you wish to bind the test case to a different class in the code-behind file, you need to update the test's "ClassName" property in order to bind the test to the particular class. To do that, select the test case in the project explorer so that its properties are shown in the Properties pane.

The code-behind class needs to be public and it should inherit ApiTestBase for its methods to be able to be executed by coded steps.

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Base Test Methods

The ApiTestBase base class provides two virtual methods: OnBeforeTestStarted and OnAfterTestCompleted. You can override one or both of them in your code-behind class. OnBeforeTestStarted will be executed before the start of any test method in your test. OnAfterTestCompleted will be executed after all test steps have finished (even if a test step fails). You can use them to set/clear runtime variables, to log information on the output or any other use case that you might find useful.

The example below shows hot to log messages to the test output before and after the execution of the test.

• C#

// This method will execute before the start of the test case
public override void OnBeforeTestStarted()
{
    this.Log.WriteLine("The test case is starting ...");
}

// This method will execute after all test steps in the test case have ended
public override void OnAfterTestCompleted()
{
    this.Log.WriteLine("Ending the test case ...");
}

• VB

' This method will execute before the start of the test Case'
Public Overrides Sub OnBeforeTestStarted()
  Log.WriteLine("The test case is starting ...")
End Sub

' This method will execute after all test steps in the test case have ended'
Public Overrides Sub OnAfterTestCompleted()
  Log.WriteLine("Ending the test case ...")
End Sub

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Context

The ApiTestBase base class exposes a Context property of type IContext which provides read/write access to the runtime variables of the project via the SetValue and GetValue methods.

Context.SetValue(string name, object value, int level = 0)

The Context.SetValue method sets a value to a runtime variable. You can store any type of value and use it in the rest of the steps in the same test case or in other test cases in the project. Use the 'level' property to specify what level to store the value to - the current test case only or the project root. If the method is called without a 'level' parameter, it will store the value in the test's scope by default.

See the Variables article for more information on using variables in your project. Variables have the same behavior regardless of whether they are created in code or by a Set Variable step.

Parameters

• name (type: System.String) - The name of the variable to be set
• value (type: System.Object) - The value to be set.
• level (type: System.Int32) - The level in the context inheritance chain to set the value. 0 means the current test case, 1 - the project root. Default is 0.

Return Value

• void

Examples

• C#

// This statement will create a variable named "user-name" with value "user1"
// in the scope of the current test case
this.Context.SetValue("user-name", "user1", o);

// This statement will create a variable named "user-id" with value 123
// in the root scope of the project
this.Context.SetValue("user-id", 123, 1);

• VB

// This statement will create a variable named "user-name" with value "user1"
// in the scope of the current test case
this.Context.SetValue("user-name", "user1", 0);

// This statement will create a variable named "user-id" with value 123
// in the root scope of the project
this.Context.SetValue("user-id", 123, 1);

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Context.GetValue(string name)

The Context.GetValue method returns the value of a specified runtime variable. You can use it to get the current value of any variable that you have set in the Variables pane of the UI, or any dinamically created runtime variable (e.g. the response body of the last executed http request step, etc.).

Parameters

• name (type: System.String) - The name of the runtime variable to retrieve.

Return Value

• Type: System.object
• Returns null if a value with the specified name cannot be found; otherwise the value stored in the context with all variable references resolved.

The method will look for a variable with the specified name in the scope of the current test first. If it is not found, it will look for such a variable in the root context of the project. If a variable with that name is not found, it will return null.

Context.GetValue has the same behavior as referencing a variable from the UI using curly brackets (e.g. {{myVariableName}})

Examples

• C#

string userName = this.Context.GetValue("user-name").ToString();

• VB

Dim userName As String = Context.GetValue("user-name").ToString()

Remember to cast properly your variables when using Context.GetValue. The method returns an object and you need to be aware of where and how the target value was initially created. Any variable, created manually in the Variables pane in the UI, is stored as a string.

• C#

int count = 5;
this.Context.SetValue("count", count, 0);

// The "count" variable can simply be cast to int as it is initially stored in code as int
int retrievedCount = (int)this.Context.GetValue("count");
this.Log.WriteLine(retrievedCount.ToString());

// The user-id variable is created in the Variables pane and is initially created
// as a string. The value needs to be parsed in order to be stored in a in code variable
int userId = int.Parse(this.Context.GetValue("user-id").ToString());
int newUserId = userId + 1;
this.Log.WriteLine(newUserId.ToString());

// The "user-name" variable is stored as string, but you still need to convert it with .ToString()
string userName = this.Context.GetValue("user-name").ToString();
this.Log.WriteLine(userName);

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Log

The ApiTestBase base class exposes a Log property of type ILog which allows writing messages to the test output.

Log.WriteLine(string message)

Parameters

message (System.String) - The custom string to write in the test output

Examples

• C#

this.Log.WriteLine("Logging some message from C# code ...");

• VB

Log.WriteLine("Logging some message from VB code ...")

See the Sample Project for more examples.

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Assert

The Telerik.ApiTesting.Framework namespace provides a basic assertion framework that you can use to perform your coded verifications using the static class Assert.

The following methods ae available:

• C#

static void AreEqual<T>(T expected, T actual);

static void AreEqual<T>(T expected, T actual, string message);

static void AreNotEqual<T>(T expected, T actual);

static void AreNotEqual<T>(T expected, T actual, string message);

static void AreSame(object expected, object actual);

static void AreSame(object expected, object actual, string message);

static void IsFalse(bool condition);

static void IsFalse(bool condition, string message);

static void IsNotNull(object value);

static void IsNotNull(object value, string message);

static void IsNull(object value);

static void IsNull(object value, string message);

static void IsTrue(bool condition);

static void IsTrue(bool condition, string message);

• VB

Shared Sub AreEqual(Of T)(expected As T, actual As T)

Shared Sub AreEqual(Of T)(expected As T, actual As T, message As String)

Shared Sub AreNotEqual(Of T)(expected As T, actual As T)

Shared Sub AreNotEqual(Of T)(expected As T, actual As T, message As String)

Shared Sub AreSame(expected As Object, actual As Object)

Shared Sub AreSame(expected As Object, actual As Object, message As String)

Shared Sub IsFalse(condition As Boolean)

Shared Sub IsFalse(condition As Boolean, message As String)

Shared Sub IsNotNull(value As Object)

Shared Sub IsNotNull(value As Object, message As String)

Shared Sub IsNull(value As Object)

Shared Sub IsNull(value As Object, message As String)

Shared Sub IsTrue(condition As Boolean)

Shared Sub IsTrue(condition As Boolean, message As String)

When an assertion fails, the execution of the test step will be terminated with status failed and the assertion message will be logged to the test output.

Examples

• C#

Assert.AreEqual("administrator", actualValue);

• VB

Assert.AreEqual("administrator", actualValue);

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