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// concurrent1
// Make the tests pass!
// I AM NOT DONE
package main_test
import (
"bytes"
"fmt"
"sync"
"testing"
)
func TestPrinter(t *testing.T) {
var buf bytes.Buffer
print(&buf)
out := buf.String()
for i := 0; i < 3; i++ {
want := fmt.Sprintf("Hello from goroutine %d!", i)
if !bytes.Contains([]byte(out), []byte(want)) {
t.Errorf("Output did not contain expected string. Wanted: %q, Got: %q", want, out)
}
}
}
func print(buf *bytes.Buffer) {
var wg sync.WaitGroup
var mu sync.Mutex
goroutines := 3
for i := 0; i < goroutines; i++ {
wg.Add(1)
go func(i int) {
defer wg.Done()
mu.Lock()
//fmt.Fprintf(buf, "Hello from goroutine %d!\n", i)
mu.Unlock()
}(i)
}
wg.Wait()
}
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