1 files changed, 89 insertions, 0 deletions
diff --git a/src/unit-tests/lexer/lexer.test.scm b/src/unit-tests/lexer/lexer.test.scm
new file mode 100644
index 0000000..807dbec
--- /dev/null
+++ b/src/unit-tests/lexer/lexer.test.scm
@@ -0,0 +1,89 @@
+;; -*- 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")