Add testing functionality and add error reporting

tests/invalid_function_name_intrinsic.qbl

@@ -1,4 +1,4 @@
-//invalid,Function name print at 1:22 is already an intrinsic
+//invalid,Function name print at 3:22 is already an intrinsic
 
 function int => print
 {

tests/missing_function_name.qbl

@@ -1,4 +1,4 @@
-//invalid,Expected function name but got { at 2:2
+//invalid,Expected function name but got { at 4:2
 
 function int =>
 {

tests/recursion.qbl

@@ -1,13 +1,14 @@
-function int int int => int fibonacci
+function int int int int => int fibonacci
 {
-	dup if
+	dup 0 == req req req req
+	if
 	{
-		req deq deq
+		req deq deq deq
 	}
 	else
 	{
-		1 dup + - swp fibonacci
+		dup + req 1 req swp - req req req fibonacci
 	}
 }
 
-20 1 0 fibonacci print
+20 0 1 0 fibonacci print

tests/req_impl.qbl

@@ -1,7 +1,4 @@
-function int int => int int req_impl
-{
-	dup deq
-}
+function int => int req_impl { }
 
-1 2 3 req_impl print print print 
-1 2 3 req print print print
+1 2 3 req_impl print print println
+1 2 3 req print print println

tests/unknown_function_basic.qbl

@@ -1,2 +1,2 @@
-//invalid,Call to unknown function foo at 1:4
+//invalid,Call to unknown function foo at 2:4
 foo

tests/unknown_function_hard.qbl

@@ -1,4 +1,4 @@
-//invalid,Call to unknown function bar at 7:7
+//invalid,Call to unknown function bar at 9:7
 
 function int => foo
 {

tests/unknown_function_in_function.qbl

@@ -1,4 +1,4 @@
-//invalid,Call to unknown function bar at 3:5
+//invalid,Call to unknown function bar at 5:5
 
 function => foo
 {

tests/while.qbl

@@ -1,4 +1,4 @@
-//valid,output:10987654321
+//valid,output:10987654321falsefalse
 
 true while
 {