only add custom tokens if not in mainnet (#2470)

* checkchainid

* tests

app/components/Views/AddAsset/index.js

@@ -1,6 +1,7 @@
 import React, { PureComponent } from 'react';
 import { SafeAreaView, StyleSheet } from 'react-native';
 import { colors, fontStyles } from '../../../styles/common';
+import { connect } from 'react-redux';
 import DefaultTabBar from 'react-native-scrollable-tab-view/DefaultTabBar';
 import AddCustomToken from '../../UI/AddCustomToken';
 import SearchTokenAutocomplete from '../../UI/SearchTokenAutocomplete';
@@ -9,6 +10,7 @@ import PropTypes from 'prop-types';
 import { strings } from '../../../../locales/i18n';
 import AddCustomCollectible from '../../UI/AddCustomCollectible';
 import { getNetworkNavbarOptions } from '../../UI/Navbar';
+import { NetworksChainId } from '@metamask/controllers';
 
 const styles = StyleSheet.create({
 	wrapper: {
@@ -32,7 +34,7 @@ const styles = StyleSheet.create({
 /**
  * PureComponent that provides ability to add assets.
  */
-export default class AddAsset extends PureComponent {
+class AddAsset extends PureComponent {
 	static navigationOptions = ({ navigation }) => getNetworkNavbarOptions('add_asset.title', true, navigation);
 
 	state = {
@@ -45,7 +47,11 @@ export default class AddAsset extends PureComponent {
 		/**
 		/* navigation object required to push new views
 		*/
-		navigation: PropTypes.object
+		navigation: PropTypes.object,
+		/**
+		 * Chain id
+		 */
+		chainId: PropTypes.string
 	};
 
 	renderTabBar() {
@@ -74,11 +80,13 @@ export default class AddAsset extends PureComponent {
 			<SafeAreaView style={styles.wrapper} testID={`add-${assetType}-screen`}>
 				{assetType === 'token' ? (
 					<ScrollableTabView renderTabBar={this.renderTabBar}>
-						<SearchTokenAutocomplete
-							navigation={navigation}
-							tabLabel={strings('add_asset.search_token')}
-							testID={'tab-search-token'}
-						/>
+						{NetworksChainId.mainnet === this.props.chainId && (
+							<SearchTokenAutocomplete
+								navigation={navigation}
+								tabLabel={strings('add_asset.search_token')}
+								testID={'tab-search-token'}
+							/>
+						)}
 						<AddCustomToken
 							navigation={navigation}
 							tabLabel={strings('add_asset.custom_token')}
@@ -96,3 +104,9 @@ export default class AddAsset extends PureComponent {
 		);
 	};
 }
+
+const mapStateToProps = state => ({
+	chainId: state.engine.backgroundState.NetworkController.provider.chainId
+});
+
+export default connect(mapStateToProps)(AddAsset);

app/components/Views/AddAsset/index.test.js

@@ -1,10 +1,27 @@
 import React from 'react';
+import configureMockStore from 'redux-mock-store';
 import { shallow } from 'enzyme';
 import AddAsset from './';
 
+const mockStore = configureMockStore();
+
 describe('AddAsset', () => {
 	it('should render correctly', () => {
-		const wrapper = shallow(<AddAsset navigation={{ state: { params: { assetType: 'token' } } }} />);
-		expect(wrapper).toMatchSnapshot();
+		const initialState = {
+			engine: {
+				backgroundState: {
+					NetworkController: {
+						provider: {
+							chainId: '1'
+						}
+					}
+				}
+			}
+		};
+
+		const wrapper = shallow(<AddAsset navigation={{ state: { params: { assetType: 'token' } } }} />, {
+			context: { store: mockStore(initialState) }
+		});
+		expect(wrapper.dive()).toMatchSnapshot();
 	});
 });