### Question:
Version implements Comparable<Version> { public int compareTo(Version other) { int numComponents = Math.max(componentCount(), other.componentCount()); for (int i = 0; i < numComponents; ++i) { if(componentAt(i).compareTo(other.componentAt(i)) !=0 ){ return componentAt(i).compareTo(other.componentAt(i)); } } return 0; } Version(String versionStr); int compareTo(Version other); @Override String toString(); @Override boolean equals(Object o); @Override int hashCode();  }### Answer:
@Test public void testCompareToOneComponent() { assertTrue(new Version("1").compareTo(new Version("1")) == 0); assertTrue(new Version("1").compareTo(new Version("2")) < 0); assertTrue(new Version("3").compareTo(new Version("2")) > 0); assertTrue(new Version("10").compareTo(new Version("2")) > 0); assertTrue(new Version("010").compareTo(new Version("10")) == 0); }
@Test public void testCompareToTwoComponents() { assertTrue(new Version("1.0").compareTo(new Version("1.0")) == 0); assertTrue(new Version("1.0").compareTo(new Version("1.1")) < 0); assertTrue(new Version("1").compareTo(new Version("1.1")) < 0); assertTrue(new Version("1.1").compareTo(new Version("1")) > 0); assertTrue(new Version("0.8").compareTo(new Version("0.10")) < 0); }
@Test public void testCompareToMoreComponents() { assertTrue(new Version("1.0.1").compareTo(new Version("1.0.1")) == 0); assertTrue(new Version("1.0.0").compareTo(new Version("1.0.1")) < 0); assertTrue(new Version("1.0").compareTo(new Version("1.0.1")) < 0); assertTrue(new Version("1.0.1").compareTo(new Version("1.0")) > 0); assertTrue(new Version("1.0.5").compareTo(new Version("1.0.1")) > 0); }
@Test public void testCompareWithStringSuffix() { assertTrue(new Version("1.0a").compareTo(new Version("1.0")) == 0); assertTrue(new Version("0.8").compareTo(new Version("0.8-SNAPSHOT")) == 0); }