If you change your code to either

expected := &MissingComponents{map[string]int{
		DefaultClientPool: 4,
		DefaultServerPool: 1,
		DefaultDriverPool: 1,
	}}

or
fmt.Printf("Do they match? %v\n", reflect.DeepEqual(actual.NodeCountByPool, expected))
you end up with true. Comparing a struct to a map will never be equal.

Closing because this is working as expected. Please comment if you disagree.

Sorry, I extracted some of the logic into a playground and mistyped. Wasn't going to share the entire project. In the actual project, I'm not comparing a struct to a map. This is actually failing in a unit test using the ginkgo/gomega frameworks. According to their docs, gomega uses reflect.DeepEqual under the hood:

For the following test case:

It("sets the number of nodes missing from each pool", func() {
	actualReturn = CheckMissingPods(test, allRunningPods)
	Expect(actualReturn.NodeCountByPool).To(Equal(
		map[string]int{
			DefaultClientPool: 0,
			DefaultDriverPool: 0,
			DefaultServerPool: 0,
		},
	))
})

This is the failed expectation we are seeing:

• Failure [0.000 seconds]
CheckMissingPods some of pods from the current load test is running [It] sets the number of nodes missing from each pool 
~/benreed/grpc/test-infra/status/missing_pods_test.go:126

  Expected
      <map[string]int | len:4>: {
          "__default_pool (drivers)": 0,
          "__default_pool (servers)": 0,
          "workers-8core": 4,
          "__default_pool (clients)": 0,
      }
  to equal
      <map[string]int | len:4>: {
          "workers": 4,
          "__default_pool (clients)": 0,
          "__default_pool (drivers)": 0,
          "__default_pool (servers)": 0,
      }

 ~/benreed/grpc/test-infra/status/missing_pods_test.go:128

I will need to dive in to see if this is some sort of issue with gomega, since it did not replicate in the playground. I'll comment here if I cannot see a way gomega could cause this failure, and I'll update what I find regarding the framework in onsi/gomega#412.

In the failure message one of the maps has the key "workers-8core" and the other has the key "workers".

@ianlancetaylor Thank you. I don't see how I missed that. I haven't felt well the last two days, and I knew I'm feeling crazy tired… guess I just thought I was still functional. Sorry to waste your time.

No worries.