Merge pull request #68 from streamich/json-print

feat: 🎸 add printJson() method

Author: streamich

src/__tests__/printJson.spec.ts

@@ -0,0 +1,23 @@
+import {printJson} from '../printJson';
+import {printTree} from '../printTree';
+
+test('formats JSON object', () => {
+  const data = {foo: 'bar'};
+  const str = 'Node' + printTree('', [(tab) => printJson(tab, data)]);
+
+  expect(str).toBe(
+    `Node
+└─ {
+     "foo": "bar"
+   }`,
+  );
+});
+
+test('prints literal on the same line', () => {
+  const str = 'Node' + printTree('', [(tab) => printJson(tab, 123)]);
+
+  expect(str).toBe(
+    `Node
+└─ 123`,
+  );
+});

src/index.ts

@@ -1,3 +1,4 @@
 export type * from './types';
 export * from './printTree';
 export * from './printBinary';
+export * from './printJson';

src/printJson.ts

@@ -0,0 +1,2 @@
+export const printJson = (tab = '', json: unknown, space: number | string = 2): string =>
+  (JSON.stringify(json, null, space) || 'nil').split('\n').join('\n' + tab);