src/unit-tests/lexer/lexer-test.scm


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;; -*- compile-command: "guile -L ./src ./src/unit-tests/lexer/lexer-test.scm"; -*-
(use-modules (srfi srfi-64)
             (modules lexer lexer))

(define (read-this str)
  (set-current-input-port
   (open-input-string str))
  str)


(test-begin "lexer-harness")


(test-equal (read-this "")
  '()
  (read-tokens))

(test-equal (read-this "(")
  '(left-paren)
  (read-tokens))

(test-equal (read-this "((")
  '(left-paren left-paren)
  (read-tokens))

(test-equal (read-this "( )")
  '(left-paren right-paren)
  (read-tokens))

(test-equal (read-this "( {;} {((};})")
  '(left-paren open-brace semi-colon close-brace open-brace left-paren left-paren close-brace semi-colon close-brace right-paren)
  (read-tokens))

(test-equal (read-this "1")
  '(1)
  (read-tokens))

(test-equal (read-this "~+-")
  '(complement add sub)
  (read-tokens))

(test-equal (read-this "---")
  '(decrement sub)
  (read-tokens))

(test-equal (read-this "+--")
  '(add decrement)
  (read-tokens))

(test-equal (read-this "0")
  '(0)
  (read-tokens))

(test-equal (read-this "0011001")
  '(11001)
  (read-tokens))

(test-equal (read-this "12 {34")
  '(12 open-brace 34)
  (read-tokens))

(test-equal (read-this "34;")
  '(34 semi-colon)
  (read-tokens))

(test-error (read-this "3.4")
            (read-tokens))

(test-equal (read-this "a")
  '("a")
  (read-tokens))

(test-equal (read-this "a_2")
  '("a_2")
  (read-tokens))

(test-error (read-this "1foo")
            (read-tokens))

(test-equal (read-this "void")
  '(void)
  (read-tokens))

(test-equal (read-this "int main(void) {return 2;}")
  '(int "main" left-paren void right-paren open-brace return 2 semi-colon close-brace)
  (read-tokens))


(test-end "lexer-harness")