tests: pwm_loopback: Fix inverted pulse measurement deviation

For the inverted pulse measurements, that should reflect
the duty-cycle off interval, the 1% deviation in test_capture
should be adjusted so it reflects duty-cycle off.

Signed-off-by: Ioannis Karachalios <[email protected]>

Author: ioannis-karachalios

tests/drivers/pwm/pwm_loopback/src/test_pwm_loopback.c

@@ -99,9 +99,12 @@ static void test_capture(uint32_t period, uint32_t pulse, enum test_pwm_unit uni
 			       "period capture off by more than 1%");
 	}
 
-	if (flags & PWM_CAPTURE_TYPE_PULSE) {
+	if (flags & PWM_POLARITY_INVERTED) {
+		zassert_within(pulse_capture, period - pulse, (period - pulse) / 100,
+				"pulse capture off by more than 1%");
+	} else {
 		zassert_within(pulse_capture, pulse, pulse / 100,
-			       "pulse capture off by more than 1%");
+				"pulse capture off by more than 1%");
 	}
 }