Creating a new format of tests.

api/chrome/features/chrome.feature

@@ -0,0 +1,6 @@
+Feature: The Chrome API client
+
+    Scenario: Using the Chrome.Start method
+        Given the Chrome client
+        When the Start method is called
+        Then Google Chrome should open

api/chrome/features/steps/steps.py

@@ -0,0 +1,16 @@
+from behave import *
+from cli import Chrome
+
+@given ("the Chrome client")
+def step_impl (context):
+    context.client = Chrome()
+
+@when ("the Start method is called")
+def step_impl (context):
+    # context._return = None
+    context._return = context.client.start()
+
+@then ("Google Chrome should open")
+def step_impl (context):
+    print (f"\n-----------\n{context._return}\n------------\n")
+    assert context._return == "", "Google Chrome did not opened as expected."