packager

app/node_modules/cuint/test/UINT32_shiftLeft-test.js

@@ -0,0 +1,73 @@
+var assert = require('assert')
+var UINT32 = require('..').UINT32
+
+describe('shiftLeft method', function () {
+
+  describe('0<<1', function () {
+
+    it('should return 0', function (done) {
+      var u = UINT32(0).shiftLeft(1)
+
+      assert.equal( u.toNumber(), 0 )
+      done()
+    })
+
+  })
+
+  describe('1<<2', function () {
+
+    it('should return 4', function (done) {
+      var u = UINT32(1).shiftLeft(2)
+
+      assert.equal( u.toNumber(), 4 )
+      done()
+    })
+
+  })
+
+  describe('1<<16', function () {
+
+    it('should return 2^16', function (done) {
+      var n = Math.pow(2, 16)
+      var u = UINT32(1).shiftLeft(16)
+
+      assert.equal( u.toNumber(), n )
+      done()
+    })
+
+  })
+
+  describe('1<<32', function () {
+
+    it('should return 0', function (done) {
+      var u = UINT32(1).shiftLeft(32)
+
+      assert.equal( u.toNumber(), 0 )
+      done()
+    })
+
+  })
+
+  describe('1<<31', function () {
+
+    it('should return 2^31', function (done) {
+      var u = UINT32(1).shiftLeft(31)
+
+      assert.equal( u.toString(16), '80000000' )
+      done()
+    })
+
+  })
+
+  describe('9<<28', function () {
+
+    it('should return 2^31', function (done) {
+      var u = UINT32(9).shiftLeft(28)
+
+      assert.equal( u.toString(16), '90000000' )
+      done()
+    })
+
+  })
+
+})