caption: Testing functionalities Test each observable functionality by providing appropriate input(s) and validating system output(s) against expected output(s) Use Requirements Document or Use Cases Examples In Currency Converter, Input a dollar amount in the text box, press ENTER and check the output displayed Press the clear button to check whether the text box is cleared and the country is deselected In Traffic Light, Press the 'Start'/ 'Stop' button and observe what they indeed start/stop the lights C-S 743
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