Managing data races

When multiple goroutines access shared data or resources concurrently, a “race condition” can occur. As we can attest, this type of concurrency bug can lead to unpredictable and undesirable behavior. The Go test tool has a built-in feature called Go race detection that can detect and identify race conditions in your Go code.

So, let’s create a main_test.go file with a simple test case:

package main
import (
     "testing"
)
func TestPackItems(t *testing.T) {
     totalItems := PackItems(2000)
     expectedTotal := 2000
     if totalItems != expectedTotal {
          t.Errorf("Expected total: %d, Actual total: %d", expectedTotal, totalItems)
     }
}

Now, let’s use the race detector:

go test -race

The result in the console will be...