diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..7c30922
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,16 @@
+sudo: false
+os:
+  - linux
+  - osx
+language: node_js
+install: npm install
+script: npm test
+after_script: npm run coverage
+env:
+  global:
+    - NODE_ENV=travis 
+node_js:
+  - node
+  - '8'
+  - '7'
+  - '6'
\ No newline at end of file
diff --git a/README-zh.md b/README-zh.md
index 2c3841c..ca1a02a 100644
--- a/README-zh.md
+++ b/README-zh.md
@@ -1,4 +1,10 @@
-# Promise-unified [![npm](https://img.shields.io/npm/dy/promise-unified.svg)](https://www.npmjs.com/package/promise-unified) [![npm](https://img.shields.io/github/issues/BlackHole1/promise-unified.svg)](https://github.com/BlackHole1/all-equal) [![npm](https://img.shields.io/github/forks/BlackHole1/promise-unified.svg)](https://github.com/BlackHole1/all-equal) [![npm](https://img.shields.io/github/stars/BlackHole1/promise-unified.svg)](https://github.com/BlackHole1/all-equal) [![npm](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/BlackHole1/all-equal)
+# Promise-unified
+[![Node Version](https://img.shields.io/badge/node.js-%3E=_6-green.svg)](https://travis-ci.org/BlackHole1/promise-unified)
+[![Build Status](https://travis-ci.org/BlackHole1/promise-unified.svg?branch=master)](https://travis-ci.org/BlackHole1/promise-unified)
+[![Coverage Status](https://coveralls.io/repos/github/BlackHole1/promise-unified/badge.svg?branch=master)](https://coveralls.io/github/BlackHole1/promise-unified?branch=master)
+[![Npm Downlaod](https://img.shields.io/npm/dy/promise-unified.svg)](https://www.npmjs.com/package/promise-unified)
+
+[![NPM](https://nodei.co/npm/promise-unified.png?downloads=true&downloadRank=true&stars=true)](https://nodei.co/npm/promise-unified/)
 
 [English description](https://github.com/BlackHole1/promise-unified/README.md)
 
diff --git a/README.md b/README.md
index 132084e..258a71e 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,10 @@
-# Promise-unified [![npm](https://img.shields.io/npm/dy/promise-unified.svg)](https://www.npmjs.com/package/promise-unified) [![npm](https://img.shields.io/github/issues/BlackHole1/promise-unified.svg)](https://github.com/BlackHole1/all-equal) [![npm](https://img.shields.io/github/forks/BlackHole1/promise-unified.svg)](https://github.com/BlackHole1/all-equal) [![npm](https://img.shields.io/github/stars/BlackHole1/promise-unified.svg)](https://github.com/BlackHole1/all-equal) [![npm](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/BlackHole1/all-equal)
+# Promise-unified
+[![Node Version](https://img.shields.io/badge/node.js-%3E=_6-green.svg)](https://travis-ci.org/BlackHole1/promise-unified)
+[![Build Status](https://travis-ci.org/BlackHole1/promise-unified.svg?branch=master)](https://travis-ci.org/BlackHole1/promise-unified)
+[![Coverage Status](https://coveralls.io/repos/github/BlackHole1/promise-unified/badge.svg?branch=master)](https://coveralls.io/github/BlackHole1/promise-unified?branch=master)
+[![Npm Downlaod](https://img.shields.io/npm/dy/promise-unified.svg)](https://www.npmjs.com/package/promise-unified)
+
+[![NPM](https://nodei.co/npm/promise-unified.png?downloads=true&downloadRank=true&stars=true)](https://nodei.co/npm/promise-unified/)
 
 [中文说明](https://github.com/BlackHole1/promise-unified/blob/master/README-zh.md)
 
diff --git a/package-lock.json b/package-lock.json
index afe2596..71eb908 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,9 +1,15 @@
 {
   "name": "promise-unified",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "abbrev": {
+      "version": "1.0.9",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.0.9.tgz",
+      "integrity": "sha1-kbR5JYinc4wl813W9jdSovh3YTU=",
+      "dev": true
+    },
     "acorn": {
       "version": "5.3.0",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.3.0.tgz",
@@ -45,6 +51,23 @@
       "integrity": "sha1-YXmX/F9gV2iUxDX5QNgZ4TW4B2I=",
       "dev": true
     },
+    "align-text": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
+      "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
+      "dev": true,
+      "requires": {
+        "kind-of": "3.2.2",
+        "longest": "1.0.1",
+        "repeat-string": "1.6.1"
+      }
+    },
+    "amdefine": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
+      "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
+      "dev": true
+    },
     "ansi-escapes": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-3.0.0.tgz",
@@ -93,6 +116,42 @@
       "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=",
       "dev": true
     },
+    "asn1": {
+      "version": "0.2.3",
+      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.3.tgz",
+      "integrity": "sha1-2sh4dxPJlmhJ/IGAd36+nB3fO4Y=",
+      "dev": true
+    },
+    "assert-plus": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
+      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
+      "dev": true
+    },
+    "async": {
+      "version": "1.5.2",
+      "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+      "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+      "dev": true
+    },
+    "asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k=",
+      "dev": true
+    },
+    "aws-sign2": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
+      "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg=",
+      "dev": true
+    },
+    "aws4": {
+      "version": "1.7.0",
+      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.7.0.tgz",
+      "integrity": "sha512-32NDda82rhwD9/JBCCkB+MRYDp0oSvlo2IL6rQWA10PQi7tDUM3eqMSltXmY+Oyl/7N3P3qNtAlv7X0d9bI28w==",
+      "dev": true
+    },
     "babel-code-frame": {
       "version": "6.26.0",
       "resolved": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.26.0.tgz",
@@ -140,6 +199,25 @@
       "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
       "dev": true
     },
+    "bcrypt-pbkdf": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.1.tgz",
+      "integrity": "sha1-Y7xdy2EzG5K8Bf1SiVPDNGKgb40=",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "tweetnacl": "0.14.5"
+      }
+    },
+    "boom": {
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/boom/-/boom-4.3.1.tgz",
+      "integrity": "sha1-T4owBctKfjiJ90kDD9JbluAdLjE=",
+      "dev": true,
+      "requires": {
+        "hoek": "4.2.1"
+      }
+    },
     "brace-expansion": {
       "version": "1.1.8",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.8.tgz",
@@ -177,6 +255,30 @@
       "integrity": "sha1-r6uWJikQp/M8GaV3WCXGnzTjUMo=",
       "dev": true
     },
+    "camelcase": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-1.2.1.tgz",
+      "integrity": "sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk=",
+      "dev": true,
+      "optional": true
+    },
+    "caseless": {
+      "version": "0.12.0",
+      "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
+      "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=",
+      "dev": true
+    },
+    "center-align": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/center-align/-/center-align-0.1.3.tgz",
+      "integrity": "sha1-qg0yYptu6XIgBBHL1EYckHvCt60=",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "align-text": "0.1.4",
+        "lazy-cache": "1.0.4"
+      }
+    },
     "chalk": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.3.0.tgz",
@@ -226,6 +328,27 @@
       "integrity": "sha1-/xnt6Kml5XkyQUewwR8PvLq+1jk=",
       "dev": true
     },
+    "cliui": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/cliui/-/cliui-2.1.0.tgz",
+      "integrity": "sha1-S0dXYP+AJkx2LDoXGQMukcf+oNE=",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "center-align": "0.1.3",
+        "right-align": "0.1.3",
+        "wordwrap": "0.0.2"
+      },
+      "dependencies": {
+        "wordwrap": {
+          "version": "0.0.2",
+          "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.2.tgz",
+          "integrity": "sha1-t5Zpu0LstAn4PVg8rVLKF+qhZD8=",
+          "dev": true,
+          "optional": true
+        }
+      }
+    },
     "co": {
       "version": "4.6.0",
       "resolved": "https://registry.npmjs.org/co/-/co-4.6.0.tgz",
@@ -247,6 +370,15 @@
       "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
       "dev": true
     },
+    "combined-stream": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.6.tgz",
+      "integrity": "sha1-cj599ugBrFYTETp+RFqbactjKBg=",
+      "dev": true,
+      "requires": {
+        "delayed-stream": "1.0.0"
+      }
+    },
     "commander": {
       "version": "2.11.0",
       "resolved": "https://registry.npmjs.org/commander/-/commander-2.11.0.tgz",
@@ -282,6 +414,27 @@
       "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
       "dev": true
     },
+    "coveralls": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/coveralls/-/coveralls-3.0.1.tgz",
+      "integrity": "sha512-FAzXwiDOYLGDWH+zgoIA+8GbWv50hlx+kpEJyvzLKOdnIBv9uWoVl4DhqGgyUHpiRjAlF8KYZSipWXYtllWH6Q==",
+      "dev": true,
+      "requires": {
+        "js-yaml": "3.10.0",
+        "lcov-parse": "0.0.10",
+        "log-driver": "1.2.7",
+        "minimist": "1.2.0",
+        "request": "2.86.0"
+      },
+      "dependencies": {
+        "minimist": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
+          "dev": true
+        }
+      }
+    },
     "cross-spawn": {
       "version": "5.1.0",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
@@ -293,6 +446,35 @@
         "which": "1.3.0"
       }
     },
+    "cryptiles": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/cryptiles/-/cryptiles-3.1.2.tgz",
+      "integrity": "sha1-qJ+7Ig9c4l7FboxKqKT9e1sNKf4=",
+      "dev": true,
+      "requires": {
+        "boom": "5.2.0"
+      },
+      "dependencies": {
+        "boom": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/boom/-/boom-5.2.0.tgz",
+          "integrity": "sha512-Z5BTk6ZRe4tXXQlkqftmsAUANpXmuwlsF5Oov8ThoMbQRzdGTA1ngYRW160GexgOgjsFOKJz0LYhoNi+2AMBUw==",
+          "dev": true,
+          "requires": {
+            "hoek": "4.2.1"
+          }
+        }
+      }
+    },
+    "dashdash": {
+      "version": "1.14.1",
+      "resolved": "https://registry.npmjs.org/dashdash/-/dashdash-1.14.1.tgz",
+      "integrity": "sha1-hTz6D3y+L+1d4gMmuN1YEDX24vA=",
+      "dev": true,
+      "requires": {
+        "assert-plus": "1.0.0"
+      }
+    },
     "debug": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
@@ -302,6 +484,13 @@
         "ms": "2.0.0"
       }
     },
+    "decamelize": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
+      "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=",
+      "dev": true,
+      "optional": true
+    },
     "deep-is": {
       "version": "0.1.3",
       "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.3.tgz",
@@ -323,6 +512,12 @@
         "rimraf": "2.6.2"
       }
     },
+    "delayed-stream": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
+      "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk=",
+      "dev": true
+    },
     "diff": {
       "version": "3.3.1",
       "resolved": "https://registry.npmjs.org/diff/-/diff-3.3.1.tgz",
@@ -338,6 +533,16 @@
         "esutils": "2.0.2"
       }
     },
+    "ecc-jsbn": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz",
+      "integrity": "sha1-D8c6ntXw1Tw4GTOYUj735UN3dQU=",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "jsbn": "0.1.1"
+      }
+    },
     "error-ex": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/error-ex/-/error-ex-1.3.1.tgz",
@@ -353,6 +558,33 @@
       "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
       "dev": true
     },
+    "escodegen": {
+      "version": "1.8.1",
+      "resolved": "https://registry.npmjs.org/escodegen/-/escodegen-1.8.1.tgz",
+      "integrity": "sha1-WltTr0aTEQvrsIZ6o0MN07cKEBg=",
+      "dev": true,
+      "requires": {
+        "esprima": "2.7.3",
+        "estraverse": "1.9.3",
+        "esutils": "2.0.2",
+        "optionator": "0.8.2",
+        "source-map": "0.2.0"
+      },
+      "dependencies": {
+        "esprima": {
+          "version": "2.7.3",
+          "resolved": "https://registry.npmjs.org/esprima/-/esprima-2.7.3.tgz",
+          "integrity": "sha1-luO3DVd59q1JzQMmc9HDEnZ7pYE=",
+          "dev": true
+        },
+        "estraverse": {
+          "version": "1.9.3",
+          "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-1.9.3.tgz",
+          "integrity": "sha1-r2fy3JIlgkFZUJJgkaQAXSnJu0Q=",
+          "dev": true
+        }
+      }
+    },
     "eslint": {
       "version": "4.15.0",
       "resolved": "https://registry.npmjs.org/eslint/-/eslint-4.15.0.tgz",
@@ -580,6 +812,12 @@
       "integrity": "sha1-Cr9PHKpbyx96nYrMbepPqqBLrJs=",
       "dev": true
     },
+    "extend": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.1.tgz",
+      "integrity": "sha1-p1Xqe8Gt/MWjHOfnYtuq3F5jZEQ=",
+      "dev": true
+    },
     "external-editor": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/external-editor/-/external-editor-2.1.0.tgz",
@@ -591,6 +829,12 @@
         "tmp": "0.0.33"
       }
     },
+    "extsprintf": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.3.0.tgz",
+      "integrity": "sha1-lpGEQOMEGnpBT4xS48V06zw+HgU=",
+      "dev": true
+    },
     "fast-deep-equal": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-1.0.0.tgz",
@@ -650,6 +894,23 @@
         "write": "0.2.1"
       }
     },
+    "forever-agent": {
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/forever-agent/-/forever-agent-0.6.1.tgz",
+      "integrity": "sha1-+8cfDEGt6zf5bFd60e1C2P2sypE=",
+      "dev": true
+    },
+    "form-data": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.3.2.tgz",
+      "integrity": "sha1-SXBJi+YEwgwAXU9cI67NIda0kJk=",
+      "dev": true,
+      "requires": {
+        "asynckit": "0.4.0",
+        "combined-stream": "1.0.6",
+        "mime-types": "2.1.18"
+      }
+    },
     "fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
@@ -668,6 +929,15 @@
       "integrity": "sha1-GwqzvVU7Kg1jmdKcDj6gslIHgyc=",
       "dev": true
     },
+    "getpass": {
+      "version": "0.1.7",
+      "resolved": "https://registry.npmjs.org/getpass/-/getpass-0.1.7.tgz",
+      "integrity": "sha1-Xv+OPmhNVprkyysSgmBOi6YhSfo=",
+      "dev": true,
+      "requires": {
+        "assert-plus": "1.0.0"
+      }
+    },
     "glob": {
       "version": "7.1.2",
       "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.2.tgz",
@@ -714,6 +984,45 @@
       "integrity": "sha512-hKlsbA5Vu3xsh1Cg3J7jSmX/WaW6A5oBeqzM88oNbCRQFz+zUaXm6yxS4RVytp1scBoJzSYl4YAEOQIt6O8V1Q==",
       "dev": true
     },
+    "handlebars": {
+      "version": "4.0.11",
+      "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.0.11.tgz",
+      "integrity": "sha1-Ywo13+ApS8KB7a5v/F0yn8eYLcw=",
+      "dev": true,
+      "requires": {
+        "async": "1.5.2",
+        "optimist": "0.6.1",
+        "source-map": "0.4.4",
+        "uglify-js": "2.8.29"
+      },
+      "dependencies": {
+        "source-map": {
+          "version": "0.4.4",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
+          "integrity": "sha1-66T12pwNyZneaAMti092FzZSA2s=",
+          "dev": true,
+          "requires": {
+            "amdefine": "1.0.1"
+          }
+        }
+      }
+    },
+    "har-schema": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/har-schema/-/har-schema-2.0.0.tgz",
+      "integrity": "sha1-qUwiJOvKwEeCoNkDVSHyRzW37JI=",
+      "dev": true
+    },
+    "har-validator": {
+      "version": "5.0.3",
+      "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-5.0.3.tgz",
+      "integrity": "sha1-ukAsJmGU8VlW7xXg/PJCmT9qff0=",
+      "dev": true,
+      "requires": {
+        "ajv": "5.5.2",
+        "har-schema": "2.0.0"
+      }
+    },
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+      "integrity": "sha1-KcVzMUgFe7Th913zW3qcty5qWd0=",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "source-map": "0.5.7",
+        "uglify-to-browserify": "1.0.2",
+        "yargs": "3.10.0"
+      },
+      "dependencies": {
+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true,
+          "optional": true
+        }
+      }
+    },
+    "uglify-to-browserify": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz",
+      "integrity": "sha1-bgkk1r2mta/jSeOabWMoUKD4grc=",
+      "dev": true,
+      "optional": true
+    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
       "dev": true
     },
+    "uuid": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.2.1.tgz",
+      "integrity": "sha512-jZnMwlb9Iku/O3smGWvZhauCf6cvvpKi4BKRiliS3cxnI+Gz9j5MEpTz2UFuXiKPJocb7gnsLHwiS05ige5BEA==",
+      "dev": true
+    },
     "validate-npm-package-license": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.1.tgz",
@@ -1523,6 +2213,17 @@
         "spdx-expression-parse": "1.0.4"
       }
     },
+    "verror": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
+      "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
+      "dev": true,
+      "requires": {
+        "assert-plus": "1.0.0",
+        "core-util-is": "1.0.2",
+        "extsprintf": "1.3.0"
+      }
+    },
     "which": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/which/-/which-1.3.0.tgz",
@@ -1532,6 +2233,13 @@
         "isexe": "2.0.0"
       }
     },
+    "window-size": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.1.0.tgz",
+      "integrity": "sha1-VDjNLqk7IC76Ohn+iIeu58lPnJ0=",
+      "dev": true,
+      "optional": true
+    },
     "wordwrap": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
@@ -1558,6 +2266,19 @@
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
       "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
       "dev": true
+    },
+    "yargs": {
+      "version": "3.10.0",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.10.0.tgz",
+      "integrity": "sha1-9+572FfdfB0tOMDnTvvWgdFDH9E=",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "camelcase": "1.2.1",
+        "cliui": "2.1.0",
+        "decamelize": "1.2.0",
+        "window-size": "0.1.0"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 3cc7f7d..6c639ec 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,9 @@
   "description": "Add a unified operation for Promise(为Promise添加一个统一的操作方法)",
   "main": "index.js",
   "scripts": {
-    "test": "mocha"
+    "test": "mocha",
+    "coverage": "istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- --recursive -R spec && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage",
+    "cov": "istanbul cover ./node_modules/mocha/bin/_mocha -- --recursive"
   },
   "repository": {
     "type": "git",
@@ -22,12 +24,14 @@
   },
   "homepage": "https://github.com/BlackHole1/promise-unified#readme",
   "devDependencies": {
+    "coveralls": "^3.0.1",
     "eslint": "^4.15.0",
     "eslint-config-standard": "^11.0.0-beta.0",
     "eslint-plugin-import": "^2.8.0",
     "eslint-plugin-node": "^5.2.1",
     "eslint-plugin-promise": "^3.6.0",
     "eslint-plugin-standard": "^3.0.1",
+    "istanbul": "^0.4.5",
     "mocha": "^4.1.0"
   }
 }