new tester; all tests categorized

tests/stdlib/tcritbits.nim

@@ -0,0 +1,28 @@
+discard """
+  output: '''abc
+def
+definition
+prefix
+xyz
+def
+definition'''
+"""
+
+import critbits
+
+when isMainModule:
+  var r: TCritBitTree[void]
+  r.incl "abc"
+  r.incl "xyz"
+  r.incl "def"
+  r.incl "definition"
+  r.incl "prefix"
+  doAssert r.contains"def"
+  #r.del "def"
+
+  for w in r.items:
+    echo w
+    
+  for w in r.itemsWithPrefix("de"):
+    echo w
+