Category: behave

Behave – Step Implementations ”; Previous Next The steps of a Scenario in the feature file in Behave should have implementation logic written in Python. This is known as the implementation/step definition file (.py extension) and should be present within the steps directory. All the necessary imports are present in this file. The steps directory should be a part of the features directory. The following screen will appear on your computer − The step definition file contains Python functions which define the steps in the feature file. At the start of the Python functions, it is mandatory to have decorators which begins with @given, @when, and so on. These decorators compare and match with the Given, Then, When, and other steps in the feature file. Feature File The feature file is as follows − Feature − Verify book name added in Library Scenario − Verify Book name Given Book details Then Verify book name Corresponding Step Implementation File The corresponding step implementation file looks like the one mentioned below − from behave import * @given(”Book details”) def impl_bk(context): print(”Book details entered”) @then(”Verify book name”) def impl_bk(context): print(”Verify book name”) Output The output obtained after running the feature file is as follows − The output shows the Feature and Scenario names, along with test results, and duration of test execution. Print Page Previous Next Advertisements ”;

Behave – First Steps ”; Previous Next Let us create a basic Behave test. Feature File The feature file for the Feature titled Payment Types is as follows − Feature − Payment Types Scenario − Verify user has two payment options Given User is on Payment screen When User clicks on Payment types Then User should get Types Cheque and Cash Corresponding Step Implementation File The corresponding step implementation file for the above mentioned feature is as follows − from behave import * @given(”User is on Payment screen”) def impl_bkpy(context): print(”User is on Payment screen”) @when(”User clicks on Payment types”) def impl_bkpy(context): print(”User clicks on Payment types”) @then(”User should get Types Cheque and Cash”) def impl_bkpy(context): print(”User should get Types Cheque and Cash”) Project Structure The project structure for the feature “Payment Types” is as follows − Output The output obtained after running the feature file is as mentioned below and the command used here is behave The output shows the Feature and Scenario names, along with test results, and duration of test execution. Python Console output is given below − Print Page Previous Next Advertisements ”;

Behave – Introduction ”; Previous Next Behave is a tool used for Behaviour driven development (BDD) in Python programming language. In an Agile development framework, BDD creates a culture where testers, developers, business analysts, and other stakeholders of the project can contribute towards the software development. In short, both technical and non-technical individuals have a role to play towards the overall project. Behave has tests developed in plain text with the implementation logic in Python. The BDD format begins with the description of the characteristics of the software similar to a story. It then continues with the development and carries out the following tasks − Developing a failing test case for characteristics. Implement the logic for a test to pass. Code refactor to fulfil the project guidelines. There are numerous libraries for BDD like the Mocha which supports JavaScript, Cucumber which supports Java/Ruby, and Behave which supports Python, and so on. In this tutorial, we shall discuss in detail about Behave. Let us see a basic structure of a BDD. It mainly consists of the feature file, the step definition file, and so on. Feature File The feature file in Behave can be as follows − Feature − Verify book name added in Library. Scenario − Verify Book name. Given − Book details. Then − Verify book name. Corresponding step definition file Following is the corresponding definition file in Behave tool − from behave import * @given(”Book details”) def impl_bk(context): print(”Book details entered”) @then(”Verify book name”) def impl_bk(context): print(”Verify book name”) Output The output obtained after running the feature file is as follows − The output shows the Feature and Scenario names, along with the test results, and the duration of the respective test execution. Print Page Previous Next Advertisements ”;

Behave – Multiline Text ”; Previous Next A block of text after a step enclosed in “”” will be linked with that step. Here, the indentation is parsed. All the whitespaces at the beginning are removed from the text and all the succeeding lines must have at least a minimum whitespace as the starting line. A text is accessible to the implementation Python code with the .text attribute within the context variable (passed in the step function). Feature File The feature file for feature titled User information is as follows − Feature − User information Scenario − Check login functionality Given user enters name and password “”” Tutorialspoint Behave Topic – Multiline Text “”” Then user should be logged in Corresponding Step Implementation File The corresponding step implementation file for the feature is as follows − from behave import * @given(”user enters name and password”) def step_impl(context): #access multiline text with .text attribute print(“Multiline Text: ” + context.text) @then(”user should be logged in”) def step_impl(context): pass Output The output obtained after running the feature file is mentioned below and the command used is behave –no-capture -f plain. The output shows the multiline text printed. Print Page Previous Next Advertisements ”;

Behave – Feature Testing Setup ”; Previous Next Behave works with three different file types, which are as follows − Feature files which are created by a Business analyst or any project stakeholder and contains behaviour related use cases. Step Implementation file for the scenarios defined in the feature file. Environment Setup files where, the pre/post conditions are to be executed prior and post the steps, features, scenarios, and so on. Feature File A feature file should be within a folder called as the features. Also, there should be a sub-directory steps within the features directory. Launching Feature file We can launch the feature file with various command line arguments. These are explained below − If no information is available, all the feature files within the features directory shall be loaded for execution in Behave. If the path of the features directory is provided, then it is mandatory to have at least one feature file (with .feature extension) and a sub-directory named steps within the features directory. Also, if the environment.py is present, it should be within the directory that has the steps directory and not within the steps directory. If the path to a feature file is provided, then it instructs Behave to search for it. To get the corresponding steps directory for that feature file, the parent directory is searched. If not found in the current parent directory, then it searches its parents. This shall continue until it reaches the file system root. Also, if the environment.py is present, it should be within the directory that has the steps directory and not within the steps directory. Print Page Previous Next Advertisements ”;