From 6aab35c6c79fd1367121c1db1b99e273e209589c Mon Sep 17 00:00:00 2001
From: Lucas Azzola <derflatulator@gmail.com>
Date: Sat, 28 Jul 2018 15:25:57 +1000
Subject: [PATCH] Add test cases for #6744

---
 .../to_match_inline_snapshot.test.js.snap     | 11 ++++++++
 .../to_match_inline_snapshot.test.js          | 16 +++++++++++
 .../src/__tests__/inline_snapshots.test.js    | 27 +++++++++++++++++++
 3 files changed, 54 insertions(+)

diff --git a/e2e/__tests__/__snapshots__/to_match_inline_snapshot.test.js.snap b/e2e/__tests__/__snapshots__/to_match_inline_snapshot.test.js.snap
index 9045ee66b05f..a3372d2f31fd 100644
--- a/e2e/__tests__/__snapshots__/to_match_inline_snapshot.test.js.snap
+++ b/e2e/__tests__/__snapshots__/to_match_inline_snapshot.test.js.snap
@@ -113,3 +113,14 @@ exports[`supports async tests 1`] = `
 });
 "
 `;
+
+exports[`writes snapshots with non-literals in expect(...) 1`] = `
+"it('works with inline snapshots', () => {
+  expect({a: 1}).toMatchInlineSnapshot(\`
+Object {
+  \\"a\\": 1,
+}
+\`);
+});
+"
+`;
diff --git a/e2e/__tests__/to_match_inline_snapshot.test.js b/e2e/__tests__/to_match_inline_snapshot.test.js
index f02ad696c316..a304b7d7a5e9 100644
--- a/e2e/__tests__/to_match_inline_snapshot.test.js
+++ b/e2e/__tests__/to_match_inline_snapshot.test.js
@@ -163,3 +163,19 @@ test('supports async tests', () => {
   expect(status).toBe(0);
   expect(fileAfter).toMatchSnapshot();
 });
+
+test('writes snapshots with non-literals in expect(...)', () => {
+  const filename = 'async.test.js';
+  const test = `
+    it('works with inline snapshots', () => {
+      expect({a: 1}).toMatchInlineSnapshot();
+    });
+  `;
+
+  writeFiles(TESTS_DIR, {[filename]: test});
+  const {stderr, status} = runJest(DIR, ['-w=1', '--ci=false', filename]);
+  const fileAfter = readFile(filename);
+  expect(stderr).toMatch('1 snapshot written from 1 test suite.');
+  expect(status).toBe(0);
+  expect(fileAfter).toMatchSnapshot();
+});
diff --git a/packages/jest-snapshot/src/__tests__/inline_snapshots.test.js b/packages/jest-snapshot/src/__tests__/inline_snapshots.test.js
index 53e9649e6db1..29a8c6b2eee1 100644
--- a/packages/jest-snapshot/src/__tests__/inline_snapshots.test.js
+++ b/packages/jest-snapshot/src/__tests__/inline_snapshots.test.js
@@ -173,3 +173,30 @@ test('saveInlineSnapshots() uses escaped backticks', () => {
     'expect("`").toMatchInlineSnapshot(`\\``);\n',
   );
 });
+
+test('saveInlineSnapshots() replaces empty function call with a template literal for objects', () => {
+  const filename = path.join(__dirname, 'my.test.js');
+  fs.readFileSync = (jest.fn(
+    () => `expect({a: 'a'}).toMatchInlineSnapshot();\n`,
+  ): any);
+  prettier.resolveConfig.sync.mockReturnValue({
+    bracketSpacing: false,
+    singleQuote: true,
+  });
+
+  saveInlineSnapshots(
+    [
+      {
+        frame: {column: 18, file: filename, line: 1},
+        snapshot: `{a: 'a'}`,
+      },
+    ],
+    prettier,
+    babelTraverse,
+  );
+
+  expect(fs.writeFileSync).toHaveBeenCalledWith(
+    filename,
+    "expect({a: 'a'}).toMatchInlineSnapshot(`{a: 'a'}`);\n",
+  );
+});