test: Add snapshot tests for ListItem and ListSection component (#322)

src/components/__tests__/ListItem.test.js

@@ -0,0 +1,47 @@
+/* @flow */
+
+import * as React from 'react';
+import renderer from 'react-test-renderer';
+import { Text } from 'react-native';
+import ListItem from '../ListItem';
+
+it('renders list item with title and description', () => {
+  const tree = renderer
+    .create(
+      <ListItem title="First Item" description="Description for first item" />
+    )
+    .toJSON();
+
+  expect(tree).toMatchSnapshot();
+});
+
+it('renders list item with icon', () => {
+  const tree = renderer
+    .create(<ListItem title="First Item" icon="folder" />)
+    .toJSON();
+
+  expect(tree).toMatchSnapshot();
+});
+
+it('renders list item with avatar', () => {
+  const tree = renderer
+    .create(<ListItem title="First Item" avatar={<Text>GG</Text>} />)
+    .toJSON();
+
+  expect(tree).toMatchSnapshot();
+});
+
+it('renders list item with avatar and icon', () => {
+  const tree = renderer
+    .create(
+      <ListItem
+        title="First Item"
+        description="Item description"
+        icon="folder"
+        avatar={<Text>GG</Text>}
+      />
+    )
+    .toJSON();
+
+  expect(tree).toMatchSnapshot();
+});

src/components/__tests__/ListSection.test.js

@@ -0,0 +1,32 @@
+/* @flow */
+
+import * as React from 'react';
+import renderer from 'react-test-renderer';
+import ListSection from '../ListSection';
+import ListItem from '../ListItem';
+
+it('renders list section without title', () => {
+  const tree = renderer
+    .create(
+      <ListSection>
+        <ListItem title="First Item" icon="folder" />
+        <ListItem title="Second Item" icon="folder" />
+      </ListSection>
+    )
+    .toJSON();
+
+  expect(tree).toMatchSnapshot();
+});
+
+it('renders list section with title', () => {
+  const tree = renderer
+    .create(
+      <ListSection title="Some title">
+        <ListItem title="First Item" icon="folder" />
+        <ListItem title="Second Item" icon="folder" />
+      </ListSection>
+    )
+    .toJSON();
+
+  expect(tree).toMatchSnapshot();
+});