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app/node_modules/cuint/test/UINT64_rotateLeft-test.js

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+var assert = require('assert')
+var UINT64 = require('..').UINT64
+
+describe('rotateLeft method', function () {
+
+  describe('0rotl1', function () {
+
+    it('should return 0', function (done) {
+      var u = UINT64(0).rotateLeft(1)
+
+      assert.equal( u.toNumber(), 0 )
+      done()
+    })
+
+  })
+
+  describe('1rotl2', function () {
+
+    it('should return 4', function (done) {
+      var u = UINT64(1).rotateLeft(2)
+
+      assert.equal( u.toNumber(), 4 )
+      done()
+    })
+
+  })
+
+  describe('1rotl16', function () {
+
+    it('should return 2^16', function (done) {
+      var n = Math.pow(2, 16)
+      var u = UINT64(1).rotateLeft(16)
+
+      assert.equal( u.toNumber(), n )
+      done()
+    })
+
+  })
+
+  describe('1rotl32', function () {
+
+    it('should return 1', function (done) {
+      var u = UINT64(1).rotateLeft(32)
+
+      assert.equal( u.toString(16), '100000000' )
+      done()
+    })
+
+  })
+
+})