Purpose

Design a Stop Watch class to track the time spent on phone calls.$$ Create a $3$ tier application with $1$ Windows Form App, $1$ Business Layer Class Library, and $1$ UnitTest project.$$ Use this class to time the number of hours, minutes and seconds.

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Fields

$$ startTime $($DateTime$)$

$$ stopTime $($DateTime$)$

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Properties

$$ ElapsedTime $($Read only$)$ returns a String in the format : hh:mm:ss

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Methods

$$ StartClock

$$ StopClock

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Exceptions

$$ StartException

$$ StopException

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Specifications

$$ The class has the above properties, methods exceptions.$(15$ pts$)$

$$ The application architecture is correct.$(5$ pts$)$

$$ When the user attempts to stop the clock without starting the StopException is raised.$(5$ pts$)$

$$ When the user attempts to start the clock when it is running the StartException is raised. $(5$ pts$)$

$$ The elapsed time can be read at any time while the clock is running.$(5$ pts$)$

$$ Use proper control naming.$(5$ pts$)$

$$ Use proper comments.$(5$ pts$)$

$$ Add a TestMethod for the StopClock and StartClock methods.$(5$ pts$)$

$$ Program crashes$(-2$ pts$/$occurrence$)$

$$ Timer Function only updates the interface$($will reject submission$)$

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Extra Credit $(10$ Points$)$

Add a split time function that displays split times $($time since beginning or last split time$).$ Extra credit will only be allowed if the base functionality of the application is working correctly.