Added the favoriteImage method and tests

__tests__/deleteImage.js

@@ -0,0 +1,15 @@
+const imgur = require('../lib/imgur.js');
+
+describe('deleteImage()', () => {
+  describe('delete image response', () => {
+    test('should fail when id is not passed', () => {
+      const errMsg = 'Missing delete hash';
+      expect(imgur.deleteImage()).rejects.toThrowError(errMsg);
+    });
+
+    test('image is successfully deleted', async () => {
+      const resp = await imgur.deleteImage('JK9ybyj');
+      expect(resp).toMatchInlineSnapshot(`true`);
+    });
+  });
+});

__tests__/favoriteImage.js

@@ -0,0 +1,16 @@
+const imgur = require('../lib/imgur.js');
+
+describe('favoriteImage()', () => {
+  describe('favorite image response', () => {
+    test('should fail with no input', () => {
+      const errMsg = 'Missing image ID';
+
+      expect(imgur.favoriteImage()).rejects.toThrowError(errMsg);
+    });
+
+    test('should return successful favorite image response', async () => {
+      const resp = await imgur.favoriteImage('lDrXtHj');
+      expect(resp).toMatchInlineSnapshot(`"favorited"`);
+    });
+  });
+});

__tests__/getGalleryInfo.js

@@ -2,7 +2,7 @@ const imgur = require('../lib/imgur.js');
 
 beforeAll(() => imgur.setClientId('abc123'));
 
-describe('getGalleryInfo', () => {
+describe('getGalleryInfo()', () => {
   describe('get gallery info response', () => {
     test('should fail when id is not passed', () => {
       const errMsg = 'Invalid gallery ID';

lib/imgur.js

@@ -86,7 +86,11 @@ imgur._imgurRequest = async (operation, payload, extraFormParams) => {
       break;
     case 'search':
       options.method = 'GET';
-      options.url += '/gallery/search/' + payload;
+      options.url += 'gallery/search/' + payload;
+      break;
+    case 'favorite':
+      options.method = 'POST';
+      options.url += 'image/' + payload + '/favorite';
       break;
     default:
       throw new Error('Invalid operation');
@@ -105,15 +109,13 @@ imgur._imgurRequest = async (operation, payload, extraFormParams) => {
     };
   }
 
-  if (operation === 'upload' || operation === 'update') {
+  if (typeof extraFormParams === 'object') {
     if (operation === 'upload') {
       form.append('image', payload);
     }
 
-    if (typeof extraFormParams === 'object') {
-      for (let param in extraFormParams) {
-        form.append(param, extraFormParams[param]);
-      }
+    for (let param in extraFormParams) {
+      form.append(param, extraFormParams[param]);
     }
 
     options.body = form;
@@ -337,7 +339,20 @@ imgur.deleteImage = async (deleteHash) => {
     throw new Error('Missing delete hash');
   }
 
-  return await imgur._imgurRequest('delete', 'deleteHash');
+  return await imgur._imgurRequest('delete', deleteHash);
+};
+
+/**
+ * Favorite image
+ * @param {string} id - the id of the image to favorite
+ * @returns {promise}
+ */
+imgur.favoriteImage = async (id) => {
+  if (!id) {
+    throw new Error('Missing image ID');
+  }
+
+  return await imgur._imgurRequest('favorite', id);
 };
 
 /**

lib/mocks/handlers.js

@@ -112,6 +112,27 @@ const handlers = [
       ctx.cookie('authorize_token', allow)
     );
   }),
+
+  rest.delete('https://api.imgur.com/3/image/JK9ybyj', (_req, res, ctx) => {
+    const response = {
+      data: true,
+      success: true,
+      status: 200,
+    };
+    return res(ctx.json(response));
+  }),
+
+  rest.post(
+    'https://api.imgur.com/3/image/lDrXtHj/favorite',
+    (_req, res, ctx) => {
+      const response = {
+        data: 'favorited',
+        success: true,
+        status: 200,
+      };
+      return res(ctx.json(response));
+    }
+  ),
 ];
 
 module.exports = {