Testing failsafe scenarios in Drone Programming - Step-by-Step Execution

Concept Flow - Testing failsafe scenarios

Start Test

↓

Simulate Normal Operation

↓

Inject Failure

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Check Failsafe Response

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Log Result

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Repeat for Other Failures

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End Test

The test starts by simulating normal drone operation, then injects a failure, checks the failsafe response, logs the result, and repeats for other failure types.

Execution Sample

Drone Programming

def test_failsafe():
    drone.start()
    drone.simulate_failure('gps_loss')
    response = drone.check_failsafe()
    print(response)

This code starts the drone, simulates a GPS loss failure, checks the failsafe response, and prints it.

Execution Table

Step	Action	Input/Condition	Failsafe Response	Output
1	Start drone	Normal operation	None	Drone started
2	Simulate failure	gps_loss	Trigger GPS failsafe mode	Failsafe mode active
3	Check failsafe	Failsafe mode active	Return to home	Response: Return to home
4	Log result	Response: Return to home	Logged success	Test passed
5	Repeat test	Simulate failure: battery_low	Trigger battery failsafe mode	Failsafe mode active
6	Check failsafe	Failsafe mode active	Land immediately	Response: Land immediately
7	Log result	Response: Land immediately	Logged success	Test passed
8	End test	All failures tested	None	Testing complete

💡 All failsafe scenarios tested and responses verified.

Variable Tracker

Variable	Start	After Step 2	After Step 3	After Step 5	After Step 6	Final
drone_status	off	normal	failsafe_active	normal	failsafe_active	normal
failsafe_mode	none	gps_loss	return_to_home	battery_low	land_immediately	none
test_result	none	none	pass	none	pass	complete

Key Moments - 2 Insights

Why does the failsafe_mode change after simulating failure?

Because simulating a failure sets the drone into a specific failsafe mode, as shown in execution_table rows 2 and 5.

Why is the drone_status 'normal' again after logging results?

After handling the failsafe and logging, the drone resets to normal status to prepare for the next test, as seen in variable_tracker after steps 3 and 6.

Visual Quiz - 3 Questions

Look at the execution_table at step 3, what is the failsafe response?

A Return to home

B Land immediately

C Hover in place

D Ignore failure

💡 Hint

Check the 'Failsafe Response' column at step 3 in the execution_table.

At which step does the drone simulate a battery low failure?

A Step 2

B Step 6

C Step 5

D Step 4

💡 Hint

Look for 'Simulate failure: battery_low' in the 'Action' column of the execution_table.

If the failsafe_mode was not reset after logging, what would be the value of drone_status after step 7?

A normal

B failsafe_active

C off

D unknown

💡 Hint

Refer to variable_tracker for drone_status changes after failsafe_mode activation.

Concept Snapshot

Testing failsafe scenarios:
- Simulate normal operation
- Inject failure (e.g., gps_loss, battery_low)
- Check drone's failsafe response
- Log results
- Repeat for all failure types
- Confirm drone recovers or safely handles failure

Full Transcript

Testing failsafe scenarios involves starting the drone, simulating failures like GPS loss or low battery, checking how the drone responds with failsafe actions such as returning home or landing immediately, logging the results, and repeating for other failure types. Variables like drone_status and failsafe_mode change during the test to reflect the current state. The test ends when all scenarios are verified.