Improving unit tests of the engine

slashben commented 10 months ago

Type

Enhancement, Tests

Description

This PR primarily focuses on enhancing the Engine struct in the engine.go file and improving unit tests. The most significant changes include:

Addition of null checks for the tracer object in the OnContainerActivityEvent method in container.go to prevent potential null pointer exceptions.
Addition of an exporter field to the Engine struct in engine.go. This allows the engine to send alerts using the provided exporter.
Update of the NewEngine function in engine.go to accept an exporter parameter.
Replacement of the global SendAlert function call with a method call on the exporter field of the Engine struct in processing.go.
Addition of a comprehensive test TestEngine_LoadEngineWithEvents in engine_test.go to simulate the engine's behavior under load.
Addition of a MockExporter in engine_test.go for testing alert sending.
Commenting out of a log statement in r1001_exec_binary_not_in_base_image.go that was printing error messages directly to the console.

Changes walkthrough

Relevant files

Error handling

container.go

+6/-2

Enhancement

engine.go pkg/engine/engine.go Added `exporter` field to the `Engine` struct and updated the `NewEngine` function to accept an `exporter` parameter. This allows the engine to send alerts using the provided exporter.	+8/-1
processing.go pkg/engine/processing.go Replaced the global `SendAlert` function call with a method call on the `exporter` field of the `Engine` struct. This change is in line with the addition of the `exporter` field to the `Engine` struct.	+1/-2

Tests

engine_test.go

+321/-6

Miscellaneous

r1001_exec_binary_not_in_base_image.go

+1/-1

codiumai-pr-agent-free[bot] commented 10 months ago

PR Description updated to latest commit (https://github.com/armosec/kubecop/commit/540b746bf24ce32d63aae132ad87b0476e995b13)

codiumai-pr-agent-free[bot] commented 10 months ago

PR Analysis

🎯 Main theme: Enhancing the Engine struct and improving unit tests
📝 PR summary: This PR introduces enhancements to the Engine struct in engine.go and improves unit tests. It adds null checks for the tracer object to prevent potential null pointer exceptions, adds an exporter field to the Engine struct for sending alerts, and updates the NewEngine function to accept an exporter parameter. It also replaces a global SendAlert function call with a method call on the exporter field of the Engine struct and adds a comprehensive test to simulate the engine's behavior under load.
📌 Type of PR: Enhancement
🧪 Relevant tests added: Yes
⏱️ Estimated effort to review [1-5]: 4, because the PR involves changes in multiple files and introduces new logic in the code, which requires a careful review to ensure correctness and efficiency.
🔒 Security concerns: No security concerns found
PR Feedback

💡 General suggestions: The PR is well-structured and the changes are logically grouped. The addition of null checks for the tracer object is a good practice to prevent potential null pointer exceptions. The introduction of the exporter field in the Engine struct and the update of the NewEngine function to accept an exporter parameter are well thought out and improve the modularity of the code. The new test TestEngine_LoadEngineWithEvents provides a good simulation of the engine's behavior under load, which is beneficial for performance testing.

🤖 Code feedback:

relevant file	pkg/engine/container.go
suggestion	Consider handling the error returned by `StartTraceContainer` and `StopTraceContainer` methods instead of ignoring it with `_`. This could help in debugging if any issues arise in the future. [important]
relevant line	_ = engine.tracer.StartTraceContainer(event.NsMntId, event.Pid, neededEvent)

relevant file	pkg/engine/engine.go
suggestion	It would be beneficial to validate the `exporter` parameter in the `NewEngine` function to ensure it's not nil before using it. This can prevent potential null pointer exceptions. [important]
relevant line	func NewEngine(k8sClientset ClientSetInterface, appProfileCache approfilecache.ApplicationProfileCache, tracer tracing.Tracer, exporter exporters.Exporter, workerPoolWidth int, nodeName string) Engine {

relevant file	pkg/engine/engine_test.go
suggestion	It's good practice to check the error returned by `Create` function when creating Pods and StatefulSets. This can help catch any issues that might occur during the creation of these resources. [medium]
relevant line	fakeclientset.CoreV1().Pods("test").Create(context.TODO(), &v1.Pod{

relevant file	pkg/engine/processing.go
suggestion	Consider handling the error returned by `SendAlert` method instead of ignoring it. This could help in debugging if any issues arise in the future. [important]
relevant line	engine.exporter.SendAlert(ruleFailure)

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armosec / kubecop