chushihua

node_modules/cuint/test/UINT64_rotateRight-test.js

@@ -0,0 +1,51 @@
+var assert = require('assert')
+var UINT64 = require('..').UINT64
+
+describe('rotateRight method', function () {
+
+  describe('0rotr1', function () {
+
+    it('should return 0', function (done) {
+      var u = UINT64(0).rotateRight(1)
+
+      assert.equal( u.toNumber(), 0 )
+      done()
+    })
+
+  })
+
+  describe('4rotr1', function () {
+
+    it('should return 2', function (done) {
+      var u = UINT64(4).rotateRight(1)
+
+      assert.equal( u.toNumber(), 2 )
+      done()
+    })
+
+  })
+
+  describe('2^16rotr16', function () {
+
+    it('should return 1', function (done) {
+      var n = Math.pow(2, 16)
+      var u = UINT64(n).rotateRight(16)
+
+      assert.equal( u.toNumber(), 1 )
+      done()
+    })
+
+  })
+
+  describe('1rotr32', function () {
+
+    it('should return 1', function (done) {
+      var u = UINT64(1).rotateRight(32)
+
+      assert.equal( u.toString(16), '100000000' )
+      done()
+    })
+
+  })
+
+})