Cornichon

Introduction

A small Gherkin DSL parser which reads in a feature file and produces stub code against a given test framework. This allows BDD to be integrated into new and existing projects without the need to depend on Cucumber.

The generated code is split into two files - the tests themselves and a set of scenario classes. This is to allow for:

• easier version control of the source code
• re-use of the scenario classes generation between unit test frameworks for the same language

The parser is written in Python and loads plug-ins for the desired output type.

Usage

A very basic test generator might look like

import cornichon


# Read the Gherkin DSL
f = open("example.feature", "r")
gherkin = f.readlines()
f.close()

# Only need to call Settings for the test framework as it builds
# on those settings for the scenarios
settings = cornichon.Settings("cpp/cppunittest")
settings["rootnamespace"] = "Cornichon::"
settings["scenarios file"] = "example.h"

# Generate the tests
fp = open("example.cpp", "w")
fp.write(cornichon.Generate(gherkin, settings, "cpp/cppunittest"))
fp.close()

# Generate the test scenarios
fp = open("example.h", "w")
fp.write(cornichon.Generate(gherkin, settings, "cpp/cppscenarios"))
fp.close()

The values of the settings can be listed,

cornichon.PrintSettings(settings)

An explanation of those values can be printed,

cornichon.HelpSettings("cpp/cppunittest")

The list of available output types can be printed,

cornichon.ListModules()

Test frameworks

C++

The scenario classes are generated using cpp/cppscenarios.

The supported frameworks are:

• cpp/cppunittest - Microsoft's Visual C++ test framework
• cpp/googletest - Google Test

C#

The scenario classes are generated using cs/csscenarios.

The supported frameworks are:

• cs/nunit - NUnit
• cs/unittesting - Microsoft's Unit Testing framework

Python

The scenario classes are generated using py/pyscenarios.

The supported frameworks are:

• py/pytests - pytest, the pytest framework
• py/pyunit_tests - unittest, the standard Python unit testing framework

Visual Basic

The scenario classes are generated using vb/vbscenarios.

The supported frameworks are:

• vb/nunit - NUnit
• vb/unittesting - Microsoft's Unit Testing framework

Contributing

Contributions are welcome. Please read the testing documentation.