feat: checking internet if pingServerUrl changes

Author: rgommezz

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-native-offline",
-  "version": "4.1.4",
+  "version": "4.2.0",
   "description": "Handy toolbelt to deal with offline mode in React Native applications. Cross-platform, provides a smooth redux integration.",
   "main": "./src/index.js",
   "author": "Raul Gomez Acuña <raulgdeveloper@gmail.com> (https://github.com/rgommezz)",
@@ -80,6 +80,9 @@
     "setupTestFrameworkScriptFile": "<rootDir>/test/setupTestEnv.js",
     "transform": {
       "^.+\\.jsx?$": "babel-jest"
-    }
+    },
+    "modulePathIgnorePatterns": [
+      "<rootDir>/example/"
+    ]
   }
 }

src/components/NetworkConnectivity.js

@@ -91,9 +91,12 @@ class NetworkConnectivity extends React.PureComponent<Props, State> {
     }
   }
 
-  componentDidUpdate(_: *, prevState: State) {
+  componentDidUpdate(prevProps: Props, prevState: State) {
+    const { pingServerUrl, onConnectivityChange } = this.props;
     const { isConnected } = this.state;
-    const { onConnectivityChange } = this.props;
+    if (prevProps.pingServerUrl !== pingServerUrl) {
+      this.checkInternet();
+    }
     if (prevState.isConnected !== isConnected) {
       onConnectivityChange(isConnected);
     }

test/NetworkConnectivity.test.js

@@ -336,6 +336,16 @@ describe('NetworkConnectivity', () => {
     });
   });
 
+  describe('pingUrlChange', () => {
+    it('calls checkInternet if pingServerUrl changes', () => {
+      const wrapper = shallow(getElement());
+      wrapper.instance().checkInternet = mockCheckInternet;
+      expect(mockCheckInternet).not.toHaveBeenCalled();
+      wrapper.setProps({ pingServerUrl: 'https://newServerToPing.com' });
+      expect(mockCheckInternet).toHaveBeenCalled();
+    });
+  })
+
   describe('props validation', () => {
     it('throws if prop pingTimeout is not a number', () => {
       expect(() =>