[Testing] Handled Dana Tests

Author: JohnnyPol

testing/invalid_semantic/dup_var.dana

@@ -0,0 +1,7 @@
+def main
+   var a b a is int
+begin
+   a := 1
+   writeInteger: a
+   writeString: "\nthis program is wrong!!!\n"
+end

testing/invalid_semantic/weak_return.dana

@@ -3,7 +3,7 @@ def main
     var i is int
 
     i := 3
-    c := "gazonk"[i]
+    c := "gazonk"[-1]
 
     writeChar: c
     writeChar: '\n'

testing/issues/weird_string.dana

@@ -0,0 +1,11 @@
+def main
+    def length is int: s as byte[]
+        var i is int
+        i := 0
+        loop:
+            if s[i] = '\0':
+                return: i
+            i := i+1
+
+    writeInteger: length("Kat")
+    writeChar: '\n'

testing/programs/length_fun.dana

@@ -0,0 +1,9 @@
+def main
+    var c is byte
+    var i is int
+
+    i := 3
+    c := "gazonk"[i + 1]
+
+    writeChar: c
+    writeChar: '\n'

testing/programs/weird_string.dana

@@ -0,0 +1 @@
+3

testing/results/length_fun.result

@@ -0,0 +1 @@
+n