chushihua

node_modules/cuint/test/UINT32_and-test.js

@@ -0,0 +1,64 @@
+var assert = require('assert')
+var UINT32 = require('..').UINT32
+
+describe('and method', function () {
+
+  describe('0&1', function () {
+
+    it('should return 0', function (done) {
+      var u = UINT32(0).and( UINT32(1) )
+
+      assert.equal( u.toNumber(), 0 )
+      done()
+    })
+
+  })
+
+  describe('1&2', function () {
+
+    it('should return 0', function (done) {
+      var u = UINT32(1).and( UINT32(2) )
+
+      assert.equal( u.toNumber(), 0 )
+      done()
+    })
+
+  })
+
+  describe('1&2^16', function () {
+
+    it('should return 0', function (done) {
+      var n = Math.pow(2, 16)
+      var u = UINT32(1).and( UINT32(n) )
+
+      assert.equal( u.toNumber(), 0 )
+      done()
+    })
+
+  })
+
+  describe('2^16&1', function () {
+
+    it('should return 0', function (done) {
+      var n = Math.pow(2, 16)
+      var u = UINT32(n).and( UINT32(1) )
+
+      assert.equal( u.toNumber(), 0 )
+      done()
+    })
+
+  })
+
+  describe('2^16&2^16', function () {
+
+    it('should return n', function (done) {
+      var n = Math.pow(2, 16)
+      var u = UINT32(n).and( UINT32(n) )
+
+      assert.equal( u.toNumber(), n )
+      done()
+    })
+
+  })
+
+})