1 files changed, 91 insertions, 0 deletions
diff --git a/lib/csc/testing.csc b/lib/csc/testing.csc
new file mode 100644
index 0000000..68678ca
--- /dev/null
+++ b/lib/csc/testing.csc
@@ -0,0 +1,91 @@
+(define-library (csc testing)
+  (export
+    assert
+    assert-equal
+    assert-raises
+    test
+    test-main)
+  (import (scheme base)
+          (only (scheme write)
+            display
+            write)
+          (only (csc compare) diff))
+  (begin
+
+
+    (define *all-tests-succeeded* #t)
+
+
+    (define (set-all-succeeded! val) (set! *all-tests-succeeded* val))
+
+
+    (define-record-type <test-handle>
+      (make-test-handle test-name)
+      test-handle?
+      (test-name test-name set-name!))
+
+
+    (define-record-type <test-error>
+      (make-test-error)
+      test-error?)
+
+
+    (define *test-error* (make-test-error))
+
+
+    (define *test-handle* (make-test-handle "global"))
+
+
+    (define (print . xs)
+      (unless (null? xs)
+        (let ((x (car xs)))
+          (if (or (string? x)
+                  (symbol? x))
+            (display x)
+            (write x)))
+        (apply print (cdr xs))))
+
+
+    (define-syntax test
+      (syntax-rules ()
+        ((test name body body* ...)
+         (begin
+           (set-name! *test-handle* (symbol->string 'name))
+           (print "=== RUN   " 'name "\n")
+           (guard (e ((test-error? e)
+                       (print "--- FAIL: " 'name "\n")
+                       (set-all-succeeded! #f)))
+             body body* ...
+             (print "--- PASS: " 'name "\n"))))))
+
+
+    (define-syntax assert
+      (syntax-rules ()
+        ((assert expr)
+         (unless expr
+           (print (test-name *test-handle*) ": (assert " 'expr ") failed.\n")
+           (raise *test-error*)))))
+
+
+    (define-syntax assert-equal
+      (syntax-rules ()
+        ((assert-equal left right transformers ...)
+          (let ((d (diff left right transformers ...)))
+            (unless (string=? "" d)
+              (print "Fatal:\n  " 'left "\nis not equal to\n  " 'right "\ndiff (-left +right):\n" d "\n")
+              (raise *test-error*))))))
+
+
+    (define-syntax assert-raises
+      (syntax-rules ()
+        ((assert-raises predicate body body* ...)
+          (assert
+            (guard (e ((predicate e) #t))
+              body body* ...
+              #f)))))
+
+
+    (define (test-main)
+      (if *all-tests-succeeded*
+        (print "PASS\n")
+        (print "FAIL\n")))))