test: /api/v0/dns (#197)

* Add DNS
* Update miscellaneous.js

Author: hacdias

SPEC/MISCELLANEOUS.md

@@ -52,3 +52,26 @@ ipfs.version((err, version) => {
 A great source of [examples][] can be found in the tests for this API.
 
 [examples]: https://github.com/ipfs/interface-ipfs-core/blob/master/src/generic.js
+
+#### `dns`
+
+> Resolve DNS links
+
+##### `Go` **WIP**
+
+##### `JavaScript` - ipfs.dns(domain, [callback])
+
+`callback` must follow `function (err, path) {}` signature, where `err` is an error if the operation was not successful. `path` is the IPFS path for that domain.
+
+If no `callback` is passed, a promise is returned.
+
+**Example:**
+
+```JavaScript
+ipfs.dns('ipfs.io', (err, path) => {
+  if (err) {
+    throw err
+  }
+  console.log(path)
+})
+```

src/miscellaneous.js

@@ -50,6 +50,13 @@ module.exports = (common) => {
       })
     })
 
+    it('.dns', () => {
+      return ipfs.dns('ipfs.io', (err, path) => {
+        expect(err).to.not.exist()
+        expect(path).to.exist()
+      })
+    })
+
     it('.id Promises support', () => {
       return ipfs.id()
         .then((res) => {
@@ -66,5 +73,12 @@ module.exports = (common) => {
           expect(result).to.have.a.property('repo')
         })
     })
+
+    it('.dns Promises support', () => {
+      return ipfs.dns('ipfs.io')
+        .then((res) => {
+          expect(res).to.exist()
+        })
+    })
   })
 }