Adding tests

- functional tests
- more tests
- tests tests tests

Signed-off-by: teo3300 <matteo.rogora@live.it>

tests/assert_fail.mal

@@ -0,0 +1 @@
+(assert nil)

tests/logic.mal

@@ -0,0 +1,31 @@
+; positive assert
+(assert true)
+(assert ())
+(assert 1)
+
+; not
+(assert (not false))
+(assert (not nil))
+(assert (not (not true)))
+
+; or
+(assert (not (or false)))
+(assert (or 1))
+(assert (or 1 nil false))
+(assert (or 1 1 1))
+(assert (or nil 1 false))
+(assert (not (or nil false)))
+(assert (not (or false nil)))
+
+; and
+(assert (and 1))
+(assert (not (and nil)))
+(assert (and 1 1 1))
+(assert (not (and 1 nil false)))
+(assert (not (and nil false)))
+
+; xor
+(assert (not (xor nil false nil)))
+(assert (xor nil 1 nil false nil))
+(assert (not (xor nil 1 false 1)))
+(assert (not (xor 1 nil 1 1)))