A developer observes that an Apex test method fails in the Sandbox. To identify the issue, the developer copies the code inside the test method and executes it via the Execute Anonymous tool in the De

A syntax error would prevent the code from compiling or executing in both the test method and Execute Anonymous, not just failing in the test method at runtime.

Apex test methods, by default, execute in an isolated context and do not have access to existing organization data. If a test passes in Execute Anonymous (which runs against live data) but fails in a test method, it indicates the test is likely dependent on specific data records or configurations that were present in the sandbox's live data but not explicitly created within the test method itself.

Calling an `@future` method in a test method typically queues it for asynchronous execution and doesn't cause the test to fail if the method logic is sound; it might require `Test.stopTest()` to ensure completion within the test context.

While `System.runAs` is important for testing user permissions and access, its absence would typically lead to failures related to insufficient permissions or incorrect user context, not a data-dependent scenario where it passes in Execute Anonymous.