feat: add is.promise

utilise · Jul 27, 2016 · e0d1302 · e0d1302
1 parent c481ecb
commit e0d1302
Show file tree

Hide file tree

Showing 2 changed files with 24 additions and 12 deletions.
diff --git a/index.js b/index.js
@@ -1,16 +1,17 @@
 module.exports = is
-is.fn     = isFunction
-is.str    = isString
-is.num    = isNumber
-is.obj    = isObject
-is.lit    = isLiteral
-is.bol    = isBoolean
-is.truthy = isTruthy
-is.falsy  = isFalsy
-is.arr    = isArray
-is.null   = isNull
-is.def    = isDef
-is.in     = isIn
+is.fn      = isFunction
+is.str     = isString
+is.num     = isNumber
+is.obj     = isObject
+is.lit     = isLiteral
+is.bol     = isBoolean
+is.truthy  = isTruthy
+is.falsy   = isFalsy
+is.arr     = isArray
+is.null    = isNull
+is.def     = isDef
+is.in      = isIn
+is.promise = isPromise
 
 function is(v){
   return function(d){
@@ -63,6 +64,10 @@ function isDef(d) {
   return typeof d !== 'undefined'
 }
 
+function isPromise(d) {
+  return d instanceof Promise
+}
+
 function isIn(set) {
   return function(d){
     return !set ? false  

diff --git a/test.js b/test.js
@@ -84,4 +84,11 @@ describe('is', function() {
     expect(is.bol('')).to.be.equal(false)
   })    
 
+  it('should check if promise', function(){
+    expect(is.promise(true)).to.be.equal(false)
+    expect(is.promise({})).to.be.equal(false)
+    expect(is.promise()).to.be.equal(false)
+    expect(is.promise(new Promise(String))).to.be.equal(true)
+  })    
+
 })