#  ex14PhillConrad.py
#   Starting point for ex14, CS5nm, 11/19/2008
#   Exercises with checking type


# check_expect checks whether a function produces the expected result
# consumes:
#     test: a string describing the test
#    check: the value we are testing (typically result of a function call)
#   expect: the value we are expecting (typically a literal value)
# produces:
#    nothing (there is no return value)
# side effect:
#    prints a message indicating whether the test passed or failed

def check_expect(test,check,expect):
    if (check == expect):
        print "Test " + test + " passed."
    else:
        print "Test " + test + " failed: expected " + str(expect)  + \
              " but I got " + str(check)


# consumes: a parameter of any type
# produces: boolean, True if the parameter is of type list

def isList(x):
    return ( type(x) == type([1,2,3]) )   # True if the type of x is a list

check_expect("isList([])", isList([]), True)  # empty list
check_expect("isList([1])", isList([1]), True) # singleton list
check_expect("isList([2,3,4])", isList([2,3,4]), True) # list of three ints

check_expect("isList(['foo',(1,2),[2,3,4]])",
             isList(['foo',(1,2),[2,3,4]]),
              True) # it's a list of a string, a tuple, and a list


check_expect("isList(1)", isList(1), False)   # it's an int
check_expect("isList((1,2))", isList((1,2)), False)  # it's a tuple

check_expect("isList( ([1,2], [2,3]) )",
              isList( ([1,2], [2,3]) ),
              False)   # it's a tuple of two lists

def isTuple(x):
       return False # @@@ STUB... Replace this line with correct value @@@

### @@@ DON'T MAKE THESE TESTS PASS BY CHANGING THESE TESTS!!!
### @@@              (20 pt penalty if you do)!!!
### @@@ (Unless of course, you really think the check expect values are wrong,
### @@@  in which case, ask your TA or instructor for assistance...)
### @@@ Ask yourself... why is that the wrong way to go?
### @@@ Instead, you should fix the definition of the function!

check_expect("isTuple( () )", isTuple( () ), True)  # empty tuple
check_expect("isTuple( (1,) )", isTuple( (1,) ), True) # singleton tuple
check_expect("isTuple( (1) )", isTuple( (1) ), False) # one in parens, not a tuple

check_expect("isTuple((2,3,4))", isTuple((2,3,4)), True) # tuple of three ints

check_expect("isTuple(('foo',(1,2),[2,3,4]))",
             isTuple(('foo',(1,2),[2,3,4])),
              True) # it's a tuple of a string, a tuple, and a list

check_expect("isTuple(['foo',(1,2),[2,3,4]])",
             isTuple(['foo',(1,2),[2,3,4]]),
              False) # it's a list of a string, a tuple, and a list


check_expect("isTuple(1)", isTuple(1), False)   # it's an int
check_expect("isTuple([1,2])", isTuple([1,2]), False)  # it's a list

check_expect("isTuple( ([1,2], [2,3]) )",
              isTuple( ([1,2], [2,3]) ),
              True)   # it's a tuple of two lists


### @@@ NOW, write a function called isString(x)
### @@@ Include a comment describing what it consumes and what it produces
### @@@ similar to the comments above the other function definitions in this file


# function definition goes here @@@

### @@@ NOW provide at least three tests where the result should be True,
### @@@    and at least three tests where the result should be False.

# tests go here  @@@