Create test for useWallet

Add @testing-library/react-hooks, make use of Provider for context and
test that useWallet can instantiate and trigger the request to connect
to the correct network.

Author: gjsyme

package.json

@@ -40,6 +40,7 @@
     "@preconstruct/cli": "^2.1.5",
     "@testing-library/jest-dom": "^5.15.1",
     "@testing-library/react": "^12.1.2",
+    "@testing-library/react-hooks": "^7.0.2",
     "chromatic": "^6.1.0",
     "husky": "^7.0.4",
     "jest": "^26.6.3",

packages/hooks/src/hooks/useWallet.test.tsx

@@ -0,0 +1,54 @@
+import React from 'react';
+import { useWallet } from './useWallet';
+import { Provider } from '../Provider';
+import { renderHook } from '@testing-library/react-hooks';
+
+let windowSpy;
+
+beforeEach(() => {
+  windowSpy = jest.spyOn(window, 'window', 'get');
+});
+
+afterEach(() => {
+  windowSpy.mockRestore();
+});
+
+test('should use the wallet', () => {
+  const wrapper = ({ children }) => (
+    <Provider network={1} infuraId={'abc123'}>
+      {children}
+    </Provider>
+  );
+  const { result } = renderHook(() => useWallet(), { wrapper });
+
+  expect(result.current.connected).toBe(false);
+  expect(typeof result.current.connectWallet).toBe('function');
+});
+
+// initially is chainId undefined / requires network per the argument
+test('should be able to switch networks', () => {
+  const testNetwork = 2;
+  const wrapper = ({ children }) => (
+    <Provider network={testNetwork} infuraId={'abc123'}>
+      {children}
+    </Provider>
+  );
+  const { result } = renderHook(() => useWallet(), { wrapper });
+
+  let requestArgs;
+
+  windowSpy.mockImplementation(() => ({
+    ethereum: {
+      request: arg => {
+        requestArgs = arg;
+      }
+    }
+  }));
+
+  result.current.switchToCorrectNetwork();
+  expect(windowSpy).toHaveBeenCalled();
+  expect(requestArgs).toStrictEqual({
+    method: 'wallet_switchEthereumChain',
+    params: [{ chainId: `0x${testNetwork}` }]
+  });
+});

yarn.lock

@@ -4029,6 +4029,17 @@
     lodash "^4.17.15"
     redent "^3.0.0"
 
+"@testing-library/react-hooks@^7.0.2":
+  version "7.0.2"
+  resolved "https://registry.yarnpkg.com/@testing-library/react-hooks/-/react-hooks-7.0.2.tgz#3388d07f562d91e7f2431a4a21b5186062ecfee0"
+  integrity sha512-dYxpz8u9m4q1TuzfcUApqi8iFfR6R0FaMbr2hjZJy1uC8z+bO/K4v8Gs9eogGKYQop7QsrBTFkv/BCF7MzD2Cg==
+  dependencies:
+    "@babel/runtime" "^7.12.5"
+    "@types/react" ">=16.9.0"
+    "@types/react-dom" ">=16.9.0"
+    "@types/react-test-renderer" ">=16.9.0"
+    react-error-boundary "^3.1.0"
+
 "@testing-library/react@^12.1.2":
   version "12.1.2"
   resolved "https://registry.yarnpkg.com/@testing-library/react/-/react-12.1.2.tgz#f1bc9a45943461fa2a598bb4597df1ae044cfc76"
@@ -4315,6 +4326,13 @@
   resolved "https://registry.yarnpkg.com/@types/qs/-/qs-6.9.7.tgz#63bb7d067db107cc1e457c303bc25d511febf6cb"
   integrity sha512-FGa1F62FT09qcrueBA6qYTrJPVDzah9a+493+o2PCXsesWHIn27G98TsSMs3WPNbZIEj4+VJf6saSFpvD+3Zsw==
 
+"@types/react-dom@>=16.9.0":
+  version "17.0.11"
+  resolved "https://registry.yarnpkg.com/@types/react-dom/-/react-dom-17.0.11.tgz#e1eadc3c5e86bdb5f7684e00274ae228e7bcc466"
+  integrity sha512-f96K3k+24RaLGVu/Y2Ng3e1EbZ8/cVJvypZWd7cy0ofCBaf2lcM46xNhycMZ2xGwbBjRql7hOlZ+e2WlJ5MH3Q==
+  dependencies:
+    "@types/react" "*"
+
 "@types/react-dom@^16.9.10":
   version "16.9.14"
   resolved "https://registry.yarnpkg.com/@types/react-dom/-/react-dom-16.9.14.tgz#674b8f116645fe5266b40b525777fc6bb8eb3bcd"
@@ -4329,6 +4347,13 @@
   dependencies:
     "@types/react" "*"
 
+"@types/react-test-renderer@>=16.9.0":
+  version "17.0.1"
+  resolved "https://registry.yarnpkg.com/@types/react-test-renderer/-/react-test-renderer-17.0.1.tgz#3120f7d1c157fba9df0118dae20cb0297ee0e06b"
+  integrity sha512-3Fi2O6Zzq/f3QR9dRnlnHso9bMl7weKCviFmfF6B4LS1Uat6Hkm15k0ZAQuDz+UBq6B3+g+NM6IT2nr5QgPzCw==
+  dependencies:
+    "@types/react" "*"
+
 "@types/react@*", "@types/react@^17.0.15", "@types/react@^17.0.36":
   version "17.0.37"
   resolved "https://registry.yarnpkg.com/@types/react/-/react-17.0.37.tgz#6884d0aa402605935c397ae689deed115caad959"
@@ -4338,6 +4363,15 @@
     "@types/scheduler" "*"
     csstype "^3.0.2"
 
+"@types/react@>=16.9.0":
+  version "17.0.38"
+  resolved "https://registry.yarnpkg.com/@types/react/-/react-17.0.38.tgz#f24249fefd89357d5fa71f739a686b8d7c7202bd"
+  integrity sha512-SI92X1IA+FMnP3qM5m4QReluXzhcmovhZnLNm3pyeQlooi02qI7sLiepEYqT678uNiyc25XfCqxREFpy3W7YhQ==
+  dependencies:
+    "@types/prop-types" "*"
+    "@types/scheduler" "*"
+    csstype "^3.0.2"
+
 "@types/react@^16":
   version "16.14.21"
   resolved "https://registry.yarnpkg.com/@types/react/-/react-16.14.21.tgz#35199b21a278355ec7a3c40003bd6a334bd4ae4a"
@@ -13632,6 +13666,13 @@ react-element-to-jsx-string@^14.3.4:
     is-plain-object "5.0.0"
     react-is "17.0.2"
 
+react-error-boundary@^3.1.0:
+  version "3.1.4"
+  resolved "https://registry.yarnpkg.com/react-error-boundary/-/react-error-boundary-3.1.4.tgz#255db92b23197108757a888b01e5b729919abde0"
+  integrity sha512-uM9uPzZJTF6wRQORmSrvOIgt4lJ9MC1sNgEOj2XGsDTRE4kmpWxg7ENK9EWNKJRMAOY9z0MuF4yIfl6gp4sotA==
+  dependencies:
+    "@babel/runtime" "^7.12.5"
+
 react-error-overlay@^6.0.9:
   version "6.0.9"
   resolved "https://registry.yarnpkg.com/react-error-overlay/-/react-error-overlay-6.0.9.tgz#3c743010c9359608c375ecd6bc76f35d93995b0a"