--- DelayTest.java	2017-12-15 14:10:57.211282400 +0900
+++ DelayTest.java.fix	2017-12-15 14:27:25.573902400 +0900
@@ -96,6 +96,11 @@
     }
 
     @Test
+    public void stringConstructorShouldWorkForNumberAttemptsAndUnitWithSpaces() throws Exception {
+        assertThat(Delay.from("2 * 36 s")).isEqualTo(new Delay(2, 36000));
+    }
+
+    @Test
     public void stringConstructorShouldThrowOnInvalidInput() throws Exception {
         expectedException.expect(NumberFormatException.class);