E2e testing

webapp/e2e/features/add-friend.feature

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+Feature: Adding a friend
+
+Scenario: The user can add a friend
+  Given A logged-in user and another user
+  When I add the user as a friend
+  Then The user should disappear from the Users page

webapp/e2e/features/create-group.feature

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+Feature: Creating a group
+
+Scenario: The user can create a group
+  Given A logged-in user
+  When I click on the Groups link and create a group
+  Then The confirmation message should be shown on screen

webapp/e2e/features/login-form.feature

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+Feature: Login a registered user
+
+Scenario: The user is registered in the site
+  Given A registered user
+  When I fill the data in the form and press submit
+  Then The home screen should be shown

webapp/e2e/features/logout.feature

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+Feature: Logging out
+
+Scenario: The user can logout
+  Given A logged-in user
+  When I click on the Logout link
+  Then The user should be logged out and the Login screen should be shown

webapp/e2e/features/play-battery.feature

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+Feature: Answering a question
+
+Scenario: The user can answer a question on Battery mode
+  Given A logged-in user
+  When I play on Battery mode and click on an answer
+  Then The next question should be loaded on screen

webapp/e2e/features/play-calculator.feature

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+Feature: Answering a question
+
+Scenario: The user can answer a question on Human Calculator mode
+  Given A logged-in user
+  When I play on Human Calculator mode and answer incorrectly
+  Then The game ends