Add logs for debugging

[godrei]

Checklist

• I've read and followed the Contribution Guidelines
• step.yml and README.md is updated with the changes (if needed)

Version

Requires a MINOR version update

Context

A significant build time difference was observed between the actual UI test time within Firebase TestLab and the step run time.

This PR adds additional logs to the step to make it clear which process causes the time difference.

Changes

Functional changes:

• Add timestamp to the major tasks' logs
• Calculate and print an approximant time spent on different steps and status
  • status durations are approximate intervals because testresult.Step is not exposing the start time of different states, to overcome this, the step stores the time when first seeing the given state

Non-functional changes:

• make up for the missing DownloadTestResults step input printing

Investigation details

Decisions

[lpusok]

NOTE: You can use duration.Round(), see https://pkg.go.dev/time#Duration.Round/.

[godrei]

updated in: a84e948

[tothszabi]

Why are the step names separated from the states and timings? I think it made it a bit harder to understand for me.

We could move them into an internal struct and have something like

type internalStepData struct {
	name           string
	stateAndTiming map[string]time.Time
}

func (i *internalStepData) saveState(state string, startTime time.Time) {
	if _, ok := i.stateAndTiming[state]; ok {
		return
	}

	// Haven't seen this state yet -> set state start time
	i.stateAndTiming[state] = startTime
}

func newInternalStepData(step toolresults.Step) internalStepData {
	return internalStepData{
		name:           createStepNameWithDimensions(step),
		stateAndTiming: map[string]time.Time{},
	}
}

func updateStepsStatesToStartTime2(steps map[string]internalStepData, response toolresults.ListStepsResponse) {
	for _, step := range response.Steps {
		data, ok := steps[step.StepId]
		if !ok {
			data = newInternalStepData(*step)
			steps[step.StepId] = data
		}

		data. saveState(step.State, time.Now())
	}
}

and then also the time calculation could be moved into this internal struct. Probably other functions can be created as well so you might not need to understand so many things upfront. 😄

But it also good as it is. It just my first impression.

[godrei]

Updated in b438236 and 5487a88