test: add dashboard component tests

Signed-off-by: Mike Murray <hellomikemurray@gmail.com>

package/src/Dashboard/Dashboard.test.js

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+import React from "react";
+import { render } from "../test-utils";
+import Dashboard from "./Dashboard";
+
+jest.mock("../hooks/useAuth", () => ({
+  __esModule: true,
+  default: () => ({
+    logout: jest.fn(),
+    viewer: {
+      primaryEmail: "test@reactioncommerce.com"
+    }
+  })
+}));
+
+const mockPlugins = [
+  {
+    route: "/test-1",
+    navTitle: "Test 1",
+    // eslint-disable-next-line react/display-name
+    MainComponent: () => (<span>Route Test 1</span>)
+  }
+];
+
+test("should be true", () => {
+  const { asFragment } = render((
+    <Dashboard
+      title="Test App"
+      plugins={mockPlugins}
+    />
+  ));
+  expect(asFragment()).toMatchSnapshot();
+});

package/src/Dashboard/__snapshots__/Dashboard.test.js.snap

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+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`should be true 1`] = `
+<DocumentFragment>
+  <div
+    class="MuiContainer-root MuiContainer-maxWidthLg"
+  >
+    <div
+      class="MuiDrawer-root MuiDrawer-docked"
+    >
+      <div
+        class="MuiPaper-root MuiDrawer-paper MuiDrawer-paperAnchorLeft MuiDrawer-paperAnchorDockedLeft MuiPaper-elevation0"
+      >
+        <ul
+          class="MuiList-root MuiList-padding"
+        >
+          <div
+            aria-disabled="false"
+            class="MuiButtonBase-root MuiListItem-root makeStyles-listItem-6 MuiListItem-gutters MuiListItem-button"
+            role="button"
+            tabindex="0"
+          >
+            <div
+              class="MuiListItemText-root makeStyles-listItemText-7"
+            >
+              Test 1
+            </div>
+            <span
+              class="MuiTouchRipple-root"
+            />
+          </div>
+          <div
+            aria-disabled="false"
+            class="MuiButtonBase-root MuiListItem-root makeStyles-listItem-6 MuiListItem-gutters MuiListItem-button"
+            role="button"
+            tabindex="0"
+          >
+            <div
+              class="MuiListItemText-root makeStyles-listItemText-7"
+            >
+              Sign Out
+            </div>
+            <span
+              class="MuiTouchRipple-root"
+            />
+          </div>
+        </ul>
+      </div>
+    </div>
+    <div
+      style="padding-left: 320px;"
+    >
+      <h1
+        class="MuiTypography-root MuiTypography-h1"
+      >
+        Test App
+      </h1>
+      <h2
+        class="MuiTypography-root MuiTypography-h2"
+      >
+        Welcome 
+      </h2>
+    </div>
+  </div>
+</DocumentFragment>
+`;