Make the backoff test better and fix a typo (#251)

Signed-off-by: sword-jin <rrylee1994@gmail.com>

v2/workloadapi/backoff_test.go

@@ -8,26 +8,37 @@ import (
 )
 
 func TestBackoff(t *testing.T) {
-	b := newBackoff()
-	b.InitialDelay = time.Second
-	b.MaxDelay = 30 * time.Second
+	new := func() *backoff { //nolint:all
+		b := newBackoff()
+		b.InitialDelay = time.Second
+		b.MaxDelay = 30 * time.Second
+		return b
+	}
 
-	t.Run("test max", func(t *testing.T) {
+	testUntilMax := func(t *testing.T, b *backoff) {
 		for i := 1; i < 30; i++ {
 			require.Equal(t, time.Duration(i)*time.Second, b.Duration())
 		}
 		require.Equal(t, 30*time.Second, b.Duration())
 		require.Equal(t, 30*time.Second, b.Duration())
 		require.Equal(t, 30*time.Second, b.Duration())
+	}
+
+	t.Run("test max", func(t *testing.T) {
+		t.Parallel()
+
+		b := new()
+		testUntilMax(t, b)
 	})
 
 	t.Run("test reset", func(t *testing.T) {
+		t.Parallel()
+
+		b := new()
+		testUntilMax(t, b)
+
 		b.Reset()
-		for i := 1; i < 30; i++ {
-			require.Equal(t, time.Duration(i)*time.Second, b.Duration())
-		}
-		require.Equal(t, 30*time.Second, b.Duration())
-		require.Equal(t, 30*time.Second, b.Duration())
-		require.Equal(t, 30*time.Second, b.Duration())
+
+		testUntilMax(t, b)
 	})
 }

v2/workloadapi/watcher.go

@@ -129,7 +129,7 @@ func (w *watcher) Close() error {
 		w.cancel()
 		w.wg.Wait()
 
-		// Close() can be called by New() to close a partially intialized source.
+		// Close() can be called by New() to close a partially initialized source.
 		// Only close the client if it has been set and the source owns it.
 		if w.client != nil && w.ownsClient {
 			w.closeErr = w.client.Close()