Implemented password hashing. Added and improved tests.

src/test/nim/testutil.nim

@@ -0,0 +1,52 @@
+import unittest, sequtils
+
+proc sameContents*[T](a1, a2: openArray[T]): bool =
+  # Answers the question: do these two arrays contain the same contents,
+  # regardless of their order?
+  if a1.len != a2.len: return false
+  for a in a1:
+    if not a2.anyIt(a == it): return false
+  return true
+
+type
+  SimpleObj* = object
+    strVal*: string
+
+  TestObj = object
+    strVal*: string
+    intVal*: int
+    objVal*: SimpleObj
+
+suite "testutil":
+
+  test "sameContents":
+    let a1 = [1, 2, 3, 4]
+    let a2 = [3, 2, 4, 1]
+    let a3 = [1, 2, 3, 5]
+    let b1 = ["this", "is", "a", "test"]
+    let b2 = ["a", "test", "this", "is"]
+    let b3 = ["a", "negative", "test", "this", "is"]
+    let c1 = [TestObj(strVal: "a", intVal: 1, objVal: SimpleObj(strVal: "innerA")),
+              TestObj(strVal: "b", intVal: 2, objVal: SimpleObj(strVal: "innerB"))]
+    let c2 = [c1[1], c1[0]]
+
+    check:
+      sameContents(a1, a2)
+      sameContents(b2, b1)
+      sameContents(c1, c2)
+      sameContents(a1, a3) == false
+      sameContents(b1, b3) == false
+
+  test "sameContents (seq)":
+    let a1 = @[1, 2, 3, 4]
+    let a2 = @[3, 2, 4, 1]
+
+    check:
+      sameContents(a1, a2)
+
+  test "sameContents (cross-type)":
+    let a1 = @[1, 2, 3, 4]
+    let a2 = [3, 2, 4, 1]
+
+    check:
+      sameContents(a1, a2)