increase coverage for initial error handling

Author: kalinchernev

lib/index.js

@@ -11,12 +11,20 @@ const finalizeSpecificationObject = require('./helpers/finalizeSpecificationObje
  * @returns {object} Output specification
  */
 module.exports = (options) => {
+  if (!options) {
+    throw new Error(`Missing or invalid input: 'options' is required`);
+  }
+
   if (!options.swaggerDefinition && !options.definition) {
     throw new Error(
-      'Provided swaggerDefinition or definition attributes are incorrect.'
+      `Missing or invalid input: 'options.swaggerDefinition' or 'options.definition' is required`
+    );
+  }
+
+  if (!options.apis || !Array.isArray(options.apis)) {
+    throw new Error(
+      `Missing or invalid input: 'options.apis' is required and it should be an array.`
     );
-  } else if (!options.apis) {
-    throw new Error('Provided apis attribute are incorrect.');
   }
 
   try {

test/lib.spec.js

@@ -2,6 +2,36 @@ const path = require('path');
 const swaggerJsdoc = require('../lib');
 
 describe('swagger-jsdoc library', () => {
+  describe('Error handling', () => {
+    it('should require options input', () => {
+      expect(() => {
+        swaggerJsdoc();
+      }).toThrow(`Missing or invalid input: 'options' is required`);
+    });
+
+    it('should require a definition input', () => {
+      expect(() => {
+        swaggerJsdoc({});
+      }).toThrow(
+        `Missing or invalid input: 'options.swaggerDefinition' or 'options.definition' is required`
+      );
+    });
+
+    it('should require an api files input', () => {
+      expect(() => {
+        swaggerJsdoc({ definition: {} });
+      }).toThrow(
+        `Missing or invalid input: 'options.apis' is required and it should be an array.`
+      );
+
+      expect(() => {
+        swaggerJsdoc({ definition: {}, apis: {} });
+      }).toThrow(
+        `Missing or invalid input: 'options.apis' is required and it should be an array.`
+      );
+    });
+  });
+
   describe('Specification v2: Swagger', () => {
     it('should support multiple paths', () => {
       let testObject = {