Initial commit for Greenlens

__tests__/components/Toast.test.tsx

@@ -0,0 +1,19 @@
+import React from 'react';
+import { render } from '@testing-library/react-native';
+import { Toast } from '../../components/Toast';
+
+describe('Toast', () => {
+  it('renders message when visible', () => {
+    const { getByText } = render(
+      <Toast message="Plant saved!" isVisible={true} onClose={jest.fn()} />
+    );
+    expect(getByText('Plant saved!')).toBeTruthy();
+  });
+
+  it('does not render when not visible', () => {
+    const { queryByText } = render(
+      <Toast message="Plant saved!" isVisible={false} onClose={jest.fn()} />
+    );
+    expect(queryByText('Plant saved!')).toBeNull();
+  });
+});