Testing ADK Loop Agents with Termination Conditions

ShopMax India uses ADK loop agents for order escalation workflows: the agent retries resolution steps until the customer confirms satisfaction or the maximum retry limit is reached. Testing loop agents requires verifying both the normal termination condition (success) and the safety termination condition (max iterations), so the agent never loops forever in production.

An ADK loop agent iterates a sub-agent until a termination condition is met. In tests, you control the iteration count by injecting a mock that changes state on a specific iteration. Assert that the loop exits on the correct iteration, that state accumulated correctly across iterations, and that the max-iteration guard fires when the success condition is never reached.

The example below simulates a ShopMax India escalation loop: the agent retries up to 5 times to resolve a delivery complaint. A mock resolver succeeds on the third attempt. Tests verify that the loop exits at the right iteration and that the max-iteration guard works when the resolver always fails.

It gives the following output,

... (3 passed in 0.01s)

In production, ShopMax India must always enforce a hard iteration cap to prevent runaway loops from burning API quota. Use exponential backoff between iterations to avoid hammering downstream services during resolution retries. Log each iteration result with its timestamp so support agents can audit the escalation trail for any order. Alert when any loop consistently hits the max iteration limit, as this signals the underlying resolver tool needs attention.