Adding error handling when missing url

lib/core/Axios.js

@@ -36,6 +36,10 @@ Axios.prototype.request = function request(configOrUrl, config) {
     config = configOrUrl || {};
   }
 
+  if (!config.url) {
+    throw new Error('Provided config url is not valid');
+  }
+
   config = mergeConfig(this.defaults, config);
 
   // Set config.method
@@ -118,6 +122,9 @@ Axios.prototype.request = function request(configOrUrl, config) {
 };
 
 Axios.prototype.getUri = function getUri(config) {
+  if (!config.url) {
+    throw new Error('Provided config url is not valid');
+  }
   config = mergeConfig(this.defaults, config);
   return buildURL(config.url, config.params, config.paramsSerializer).replace(/^\?/, '');
 };

test/specs/api.spec.js

@@ -11,7 +11,7 @@ describe('static api', function () {
   });
 
   it('should have promise method helpers', function () {
-    var promise = axios();
+    var promise = axios('/test');
 
     expect(typeof promise.then).toEqual('function');
     expect(typeof promise.catch).toEqual('function');

test/specs/requests.spec.js

@@ -7,6 +7,24 @@ describe('requests', function () {
     jasmine.Ajax.uninstall();
   });
 
+  it('should throw error when missing url', function (done) {
+    expect(() => axios()).toThrowError(/Provided config url is not valid/);
+    done();
+
+    expect(() => axios('')).toThrowError(/Provided config url is not valid/);
+    done();
+
+    expect(() => axios({
+      url: undefined,
+    })).toThrowError(/Provided config url is not valid/);
+    done();
+
+    expect(() => axios({
+      method: 'POST',
+    })).toThrowError(/Provided config url is not valid/);
+    done();
+  });
+
   it('should treat single string arg as url', function (done) {
     axios('/foo');