test: physical: Cover trigger:timer branch in setInitialState()

The test causes execution to take the following path in
setInitialState(), previously outlined in 264d909d3dc9 ("test: Add tests
for Physical class") as being missed:

    auto trigger = led.getTrigger();
    if (trigger == "timer")
    {
        // LED is blinking. Get the delay_on and delay_off and compute
        // DutyCycle. sfsfs values are in strings. Need to convert 'em over to
        // integer.
        auto delayOn = led.getDelayOn();
        auto delayOff = led.getDelayOff();

        // Calculate frequency and then percentage ON
        frequency = delayOn + delayOff;
        auto factor = frequency / 100;
        auto dutyOn = delayOn / factor;

        // Update.
        this->dutyOn(dutyOn);
    }

This brings the line coverage to 96.6% (function coverage remains
unchanged by this patch).

Change-Id: Ie311186f6275d3fdd31de5698c7c14bb335128e1
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
1 file changed