Example Cucumber Spec

    Feature: Checks that the expression parser is working correctly
    
        Scenario: Basic Addition
            Given that the user has entered "3 + 4"
            When I evaluate their expression
            Then I should get a result of 7
    
        Scenario: Order of operations
            Given that the user has entered "3 - 9 / 3"
            When I evaluate their expression
            Then I should get a result of 0

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