Throw if entity is missing

jshttp · Aug 25, 2014 · 029e90c · 029e90c
1 parent e01a4b8
commit 029e90c
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diff --git a/index.js b/index.js
@@ -25,6 +25,10 @@ var crypto = require('crypto')
  */
 
 function etag(entity) {
+  if (entity == null) {
+    throw new TypeError('argument entity is required')
+  }
+
   if (entity.length === 0) {
     // fast-path empty body
     return '"1B2M2Y8AsgTpgAmY7PhCfg=="'

diff --git a/test/test.js b/test/test.js
@@ -3,6 +3,10 @@ var assert = require('assert')
 var etag = require('..')
 
 describe('etag(entity)', function () {
+  it('should require an entity', function () {
+    assert.throws(etag.bind(), /argument entity is required/)
+  })
+
   describe('when "entity" is a string', function () {
     it('should generate an ETag', function () {
       assert.equal(etag('beep boop'), '"Z34SGyQ2IB7YzB7HMkCjrQ=="')