Power Apps SpecFlow Bindings

A SpecFlow bindings library for Power Apps.

The aim of this project is to make Power Apps test automation easier, faster and more accessible. It does this by providing a library of generic SpecFlow step bindings that adhere to test automation best practices. This allows effective automated tests to be written without the dependency on developers who are both proficient with Power Apps and test automation.

Table of Contents

• Installation
• Usage
  • Configuration
  • Writing feature files
  • Writing step bindings
  • Test setup
    • Bindings
    • Data file syntax
    • Dynamic data
• Contributing
• Licence

Installation

Follow the guidance in the Installation and Setup section in SpecFlow's docs. After installing the IDE integration and setting up your project, install the NuGet package.

PM> Install-Package Capgemini.PowerApps.SpecFlowBindings

Once the NuGet package is installed, follow the SpecFlow documentation on referencing an external binding library. At the time of writing - for SpecFlow 3.x - you should update a specflow.json file in your project root as follows -

{
    "stepAssemblies": [
        { "assembly": "Capgemini.PowerApps.SpecFlowBindings" }
    ]
}

WebDrivers

We do not have a dependency on any specific WebDrivers. You will need to ensure that the correct WebDrivers are available in your project based on the browser that you are targetting. For example - if your configuration file is targetting Chrome - you can install the Chrome WebDriver via NuGet -

PM> Install-Package Selenium.Chrome.WebDriver

Usage

Configuration

Installing the NuGet package creates a power-apps-bindings.yml file in your project's root. This is used to configure the URL, browser, and users that will be used for your tests.

url: SPECFLOW_POWERAPPS_URL # mandatory
useProfiles: false # optional - defaults to false if not set
browserOptions: # optional - will use default EasyRepro options if not set
  browserType: Chrome
  headless: true
  width: 1920
  height: 1080
  startMaximized: false
  driversPath: ChromeWebDriver # optional - [Recommended when running tests from Azure DevOps Microsoft-hosted agent](https://docs.microsoft.com/en-us/azure/devops/pipelines/test/continuous-test-selenium?view=azure-devops#decide-how-you-will-deploy-and-test-your-app)
applicationUser: # optional - populate if creating test data for users other than the current user
  tenantId: SPECFLOW_POWERAPPS_TENANTID optional # mandatory
  clientId: SPECFLOW_POWERAPPS_CLIENTID # mandatory
  clientSecret: SPECFLOW_POWERAPPS_CLIENTSECRET # mandatory
users: # mandatory
  - username: SPECFLOW_POWERAPPS_USERNAME_SALESPERSON # mandatory
    password: SPECFLOW_POWERAPPS_PASSWORD_SALESPERSON # optional - populate if this user will be logging in for tests
    alias: a salesperson # mandatory

The URL, driversPath, usernames, passwords, and application user details will be set from environment variable (if found). Otherwise, the value from the config file will be used. The browserOptions node supports anything in the EasyRepro BrowserOptions class.

Tests will be distributed evenly between the users if multiple users are configured with the same alias. This can be helpful when you run a large number of tests in parallel and are encountering errors due to user-level platform API limits.

User profiles

Setting the useProfiles property to true causes the solution to create and use a unique profile for each user listed in the config file. This currently only works in Chrome & Firefox and attempting to use it with Edge or IE will cause an exception to be thrown. By using profiles test runs for the same user will not be required to re-authenticate, this saves time during test runs. To take full advantage of this you will need to have the "Stay Signed In" prompt enabled.

Writing feature files

You can use the predefined step bindings to write your tests.

Scenario: User can create a new account
 Given I am logged in to the 'Sales Team Member' app as 'an admin'
 When I open the 'Accounts' sub area of the 'Customers' group
 Then I can see the 'New' command

Alternatively, write your own step bindings (see below).

Writing step bindings

You can write your own step bindings that have thread-safe access to EasyRepro and the Selenium WebDriver. This ensures that your tests can be ran safely in parallel. You can do this by creating a class decorated with the SpecFlow BindingAttribute and inheriting from the PowerAppsStepDefiner base class. You can then create your SpecFlow step bindings by interacting with the XrmApp and Driver properties.

[Binding]
public class MyCustomSteps : PowerAppsStepDefiner
{
    [Given(@"I have a custom step")]
    public void GivenIHaveACustomStep()
    {
      // Interact with the inherited EasyRepro 'Browser' object.
      // Interact with the inherited Selenium 'Driver' object.
    }
}

Test setup

Bindings

We avoid performing test setup via the UI. This speeds up test execution and makes the tests more robust (as UI automation is more fragile than using supported APIs). Given steps should therefore be carried out using the Client API, WebAPI or Organization Service.

You can create test data by using the following Given steps -

Given I have created 'a record'

or

Given 'someone' has created 'a record with a difference'

These bindings look for a corresponding JSON file in a data folder in the root of your project. The file is resolved using a combination of the directory structure and the file name. For example, the bindings above could resolve the following files:

└───data
    │   a record.json
    │
    └───a record
            with a difference.json

If you are using the binding which creates data as someone other than the current user, you will need the following configuration to be present:

• a user with a matching alias in the users array that has the username set
• an application user with sufficient privileges to impersonate the above user configured in the applicationUser property.

Refer to the Microsoft documentation on creating an application user here.

Data file syntax

The JSON is similar to that expected by Web API when creating records via a deep insert.

{
  "@logicalName": "account",
  "@alias": "sample account",
  "name": "Sample Account",
  "primarycontactid": {
    "firstname": "John",
    "lastname": "Smith"
  },
  "opportunity_customer_accounts": [
    {
      "name": "Opportunity associated to Sample Account",
      "Opportunity_Tasks": [{ "subject": "Task associated to opportunity" }]
    }
  ]
}

The example above will create the following:

• An account
• An primary contact related to the account
• An opportunity related to the account
• A task related to the opportunity

In addition to the standard Web API syntax, we also have the following:

Dynamic data

We support faker.js moustache template syntax for generating dynamic test data at run-time. Please refer to the faker documentation for all of the functionality that is available. The below JSON will generate a contact with a random name, credit limit, email address, and date of birth in the past 90 years:

{
  "@logicalName": "contact",
  "@alias": "a dynamically generated contact",
  "lastname": "{{name.firstName}}",
  "firstname": "{{name.lastName}}",
  "[email protected]": "{{finance.amount}}",
  "emailaddress1": "{{internet.email}}",
  "[email protected]": "{{date.past(90)}}",
  "[email protected]": "sample account"
}

When using faker syntax, you must also annotate number or date fields using @faker.number, @faker.date or @faker.dateonly to ensure that the JSON is formatted correctly.

You can also dynamically set lookups by alias using <lookup>@alias.bind (this is limited to aliased records in other files - not the current file).

Contributing

Please refer to the Contributing guide.

Licence

Power Apps SpecFlow Bindings is released under the MIT licence.