test1: ---
assert("aaa".compareTo("bbb") > 0)
             |                |
             |                false
             -1
---
test2: ---
assert("aaa" > "bbb")
             |
             false
---
test3: ---
assert("aaa".compareTo("bbb") >= 0)
             |                |
             |                false
             -1
---
test4: ---
assert("aaa" >= "bbb")
             |
             false
---
test5: ---
assert("bbb".compareTo("aaa") < 0)
             |                |
             |                false
             1
---
test6: ---
assert("bbb" < "aaa")
             |
             false
---
test7: ---
assert("bbb".compareTo("aaa") <= 0)
             |                |
             |                false
             1
---
test8: ---
assert("bbb" <= "aaa")
             |
             false
---
test9: ---
assert(("aa" < "a") > ("aa" > "bb"))
             |      |       |
             |      |       false
             |      false
             false
---
