Update tests

tests/cli.test.ts

@@ -88,7 +88,25 @@ describe('subreddit', () => {
 
         expect(subreddit).toBe('Horses');
     }, 5000);
-})
+});
+
+describe('json', () => {
+    test('GIVEN -j is supplied, EXPECT output to be valid JSON', async () => {
+        const result = await cli(['-j'], '.');
+
+        const json = JSON.parse(result.stdout);
+
+        expect(json).toBeDefined();
+    }, 5000);
+
+    test('GIVEN --json is supplied, EXPECT output to be valid JSON', async () => {
+        const result = await cli(['--json'], '.');
+
+        const json = JSON.parse(result.stdout);
+
+        expect(json).toBeDefined();
+    }, 5000);
+});
 
 function cli(args: string[], cwd: string): Promise<cliResult> {
     return new Promise(resolve => {