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lexer_test.py
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from lexer import *
def test_match_var():
print("Testing Match Var")
program = "??!x = 3"
m = match_variable(program, 0)
assert (m == (None, 0))
program = " x = 3"
m = match_variable(program, 0)
assert (m == (None, 0))
program = "3x = 3"
m = match_variable(program, 0)
assert (m == (None, 0))
program = "312xx = 3"
m = match_variable(program, 0)
assert (m == (None, 0))
program = "x = 3"
m = match_variable(program, 0)
assert (m == ((VARIABLE, "x"), 1))
program = "hello_world = 3"
m = match_variable(program, 0)
assert (m == ((VARIABLE, "hello_world"), 11))
program = "hello_world12 = 3"
m = match_variable(program, 0)
assert (m == ((VARIABLE, "hello_world12"), 13))
program = "x0 = 3"
m = match_variable(program, 0)
assert (m == ((VARIABLE, "x0"), 2))
program = "x0 = y0"
m = match_variable(program, 0)
assert (m == ((VARIABLE, "x0"), 2))
program = "x0 = y0"
m = match_variable(program, 5)
assert (m == ((VARIABLE, "y0"), 2))
program = "x0 = y0 + 34"
m = match_variable(program, 5)
assert (m == ((VARIABLE, "y0"), 2))
program = "L"
m = match_variable(program, 0)
assert (m == ((VARIABLE, "L"), 1))
program = "L0"
m = match_variable(program, 0)
assert (m == ((VARIABLE, "L0"), 2))
program = "j k"
m = match_variable(program, 0)
assert (m == ((VARIABLE, "j"), 1))
program = "j k"
m = match_variable(program, 2)
assert (m == ((VARIABLE, "k"), 1))
program = "j k2"
m = match_variable(program, 2)
assert (m == ((VARIABLE, "k2"), 2))
program = "j K2"
m = match_variable(program, 2)
assert (m == ((VARIABLE, "K2"), 2))
program = "S"
m = match_variable(program, 0)
assert (m == ((VARIABLE, "S"), 1))
program = "_"
m = match_variable(program, 0)
assert (m == ((VARIABLE, "_"), 1))
program = "_x"
m = match_variable(program, 0)
assert (m == ((VARIABLE, "_x"), 2))
program = "__"
m = match_variable(program, 0)
assert (m == ((VARIABLE, "__"), 2))
print("Tested Match Var")
def test_match_int():
print("Testing Match Int")
program = "3"
m = match_int(program, 0)
assert (m == ((INTEGER, 3), 1))
program = "0"
m = match_int(program, 0)
assert (m == ((INTEGER, 0), 1))
program = "100"
m = match_int(program, 0)
assert (m == ((INTEGER, 100), 3))
program = "405"
m = match_int(program, 0)
assert (m == ((INTEGER, 405), 3))
program = "x = 23"
m = match_int(program, 4)
assert (m == ((INTEGER, 23), 2))
program = "x0 = 1219"
m = match_int(program, 5)
assert (m == ((INTEGER, 1219), 4))
# test no leading 0's
program = "00"
m = match_int(program, 0)
assert (m == (None, 0))
program = "007"
m = match_int(program, 0)
assert (m == (None, 0))
program = "ssh1 007"
m = match_int(program, 5)
assert (m == (None, 0))
program = "00001007"
m = match_int(program, 0)
assert (m == (None, 0))
program = "a"
m = match_int(program, 0)
assert (m == (None, 0))
program = "Lasda"
m = match_int(program, 0)
assert (m == (None, 0))
program = "3.01"
m = match_int(program, 0)
assert (m == (FLOAT, 3.01), 4)
program = "0.01"
m = match_int(program, 0)
assert (m == (FLOAT, 3.01), 4)
program = "12100.0"
m = match_int(program, 0)
assert (m == (FLOAT, 12100.0), 7)
print("Tested Match Var")
def test_match_keywords():
print("Testing Match Keywords")
program = "if else"
m = match_keywords(program, 0)
assert (m == ((KEYWORD, "if"), 2)) # add space
program = "if else"
m = match_keywords(program, 3)
assert (m == ((KEYWORD, "else"), 4))
program = "if while "
m = match_keywords(program, 3)
assert (m == ((KEYWORD, "while"), 5))
program = "if while"
m = match_keywords(program, 3)
assert (m == ((KEYWORD, "while"), 5))
program = "i"
m = match_keywords(program, 0)
assert (m == (None, 0))
program = "eLSe"
m = match_keywords(program, 0)
assert (m == (None, 0))
program = "+"
m = match_keywords(program, 0)
assert (m == ((KEYWORD, "+"), 1))
program = "-"
m = match_keywords(program, 0)
assert (m == ((KEYWORD, "-"), 1))
program = "*"
m = match_keywords(program, 0)
assert (m == ((KEYWORD, "*"), 1))
program = "/"
m = match_keywords(program, 0)
assert (m == ((KEYWORD, "/"), 1))
program = "("
m = match_keywords(program, 0)
assert (m == ((KEYWORD, "("), 1))
program = ")"
m = match_keywords(program, 0)
assert (m == ((KEYWORD, ")"), 1))
program = ">"
m = match_keywords(program, 0)
assert (m == ((KEYWORD, ">"), 1))
program = "<"
m = match_keywords(program, 0)
assert (m == ((KEYWORD, "<"), 1))
program = ">="
m = match_keywords(program, 0)
assert (m == ((KEYWORD, ">="), 2))
program = "<="
m = match_keywords(program, 0)
assert (m == ((KEYWORD, "<="), 2))
program = "x:=3"
m = match_keywords(program, 1)
assert (m == ((KEYWORD, ":="), 2))
program = "True False"
m = match_keywords(program, 0)
assert (m == ((KEYWORD, "True"), 4))
program = "True False"
m = match_keywords(program, 5)
assert (m == ((KEYWORD, "False"), 5))
program = "fun -> endfun"
m = match_keywords(program, 0)
assert (m == ((KEYWORD, "fun"), 3))
program = "fun -> endfun "
m = match_keywords(program, 4)
assert (m == ((KEYWORD, "->"), 2))
program = "fun -> endfun "
m = match_keywords(program, 7)
assert (m == ((KEYWORD, "endfun"), 6))
print("Tested Match Keywords")
def test_str():
print("Testing Match String")
program = '"hello world!"'
m = match_string(program, 0)
assert (m == ((STRING, "hello world!"), len(program)))
program = '""'
m = match_string(program, 0)
assert (m == ((STRING, ""), len(program)))
program = '"h"'
m = match_string(program, 0)
assert (m == ((STRING, "h"), len(program)))
print("Tested Match String")
def test_lex():
print("Testing Lex")
program = "if else"
m = lex(program)
assert (m == [(KEYWORD, "if"), (KEYWORD, "else")])
program = 'if else "hello"'
m = lex(program)
assert (m == [(KEYWORD, "if"), (KEYWORD, "else"), (STRING, "hello")])
program = 'if else "hello" '
m = lex(program)
assert (m == [(KEYWORD, "if"), (KEYWORD, "else"), (STRING, "hello")])
program = '"lol" if else "hello" '
m = lex(program)
assert (m == [(STRING, "lol"), (KEYWORD, "if"),
(KEYWORD, "else"), (STRING, "hello")])
program = ' "lol"if else "hello" '
m = lex(program)
assert (m == [(STRING, "lol"), (KEYWORD, "if"),
(KEYWORD, "else"), (STRING, "hello")])
program = ' if "lol"else "hello" ' # if needs a space after!
m = lex(program)
assert (m == [(KEYWORD, "if"), (STRING, "lol"),
(KEYWORD, "else"), (STRING, "hello")])
program = "x:=3"
m = lex(program)
assert (m == [(VARIABLE, "x"), (KEYWORD, ":="), (INTEGER, 3)])
program = "x := 3"
m = lex(program)
assert (m == [(VARIABLE, "x"), (KEYWORD, ":="), (INTEGER, 3)])
program = "x2:=343"
m = lex(program)
assert (m == [(VARIABLE, "x2"), (KEYWORD, ":="), (INTEGER, 343)])
program = " x2:= 343 23 "
m = lex(program)
assert (m == [(VARIABLE, "x2"), (KEYWORD, ":="),
(INTEGER, 343), (INTEGER, 23)])
program = " True x2:= 343 23 False "
m = lex(program)
assert (m == [(KEYWORD, "True"), (VARIABLE, "x2"), (KEYWORD, ":="),
(INTEGER, 343), (INTEGER, 23), (KEYWORD, "False")])
program = " fun x y -> x*y endfun "
m = lex(program)
assert (m == [(KEYWORD, "fun"), (VARIABLE, "x"), (VARIABLE, "y"), (KEYWORD, "->"),
(VARIABLE, "x"), (KEYWORD, "*"), (VARIABLE, "y"), (KEYWORD, "endfun")])
program = " fun x y -> x*y endfun "
m = lex(program)
assert (m == [(KEYWORD, "fun"), (VARIABLE, "x"), (VARIABLE, "y"), (KEYWORD, "->"),
(VARIABLE, "x"), (KEYWORD, "*"), (VARIABLE, "y"), (KEYWORD, "endfun")])
program = " fun x y -> while x > 0 x*y endfun "
m = lex(program)
assert (m == [(KEYWORD, "fun"), (VARIABLE, "x"), (VARIABLE, "y"), (KEYWORD, "->"), (KEYWORD, "while"),
(VARIABLE, "x"), (KEYWORD, ">"), (INTEGER, 0), (VARIABLE, "x"), (KEYWORD, "*"), (VARIABLE, "y"), (KEYWORD, "endfun")])
program = " True ?? x2:= 343 23 False "
try:
m = lex(program)
assert False
except TOKENIZATION_ERROR:
assert True
print("Tested Lex")
if __name__ == "__main__":
test_lex()
test_match_var()
test_match_int()
test_str()
test_match_keywords()