reintroduce more complete test suite

Author: antoinerg

test/unit/server_test.js

@@ -191,12 +191,13 @@ tap.test('createServer:', t => {
       }
     }
     const payload = JSON.stringify(mock)
+    const SERVER_URL = 'http://localhost:8001'
 
     t.test('it should use the default format when mime type is unknown', t => {
       _boot([], () => {
         return request({
           method: 'POST',
-          url: `http://localhost:8001/`,
+          url: SERVER_URL + '/',
           headers: {
             'Accept': 'invalid_format'
           },
@@ -209,6 +210,47 @@ tap.test('createServer:', t => {
       })
     })
 
+    t.test('it should return figure in requested format', t => {
+      _boot([], () => {
+        return request({
+          method: 'POST',
+          url: SERVER_URL + '/',
+          headers: {
+            'Accept': 'image/svg+xml'
+          },
+          body: payload
+        }, (err, res, body) => {
+          if (err) t.fail(err)
+
+          t.equal(res.statusCode, 200, 'code')
+          t.equal(res.headers['content-type'], 'image/svg+xml')
+          t.end()
+        })
+      })
+    })
+
+    t.test('it should be overriden by format provided in payload', t => {
+      _boot([], () => {
+        request({
+          method: 'POST',
+          url: SERVER_URL + '/',
+          headers: {
+            'Accept': 'image/svg+xml'
+          },
+          body: JSON.stringify({
+            format: 'png',
+            figure: mock
+          })
+        }, (err, res, body) => {
+          if (err) t.fail(err)
+
+          t.equal(res.statusCode, 200, 'code')
+          t.equal(res.headers['content-type'], 'image/png')
+          t.end()
+        })
+      })
+    })
+
     t.done()
   })