From d679f235ed06e559346cc924b2cf3d51c7912905 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philipp=20Spie=C3=9F?= <hello@philippspiess.com>
Date: Tue, 6 Jun 2017 17:24:56 +0200
Subject: [PATCH] Also infer parser when using `--list-different` (#1997)

* Also infer parser when using `--list-different`

* Add integration tests for parser inference
---
 bin/prettier.js                                |  7 ++++++-
 .../with-parser-inference.js.snap              | 13 +++++++++++++
 .../__tests__/with-parser-inference.js         | 18 ++++++++++++++++++
 .../cli/with-parser-inference/javascript.js    |  2 ++
 .../cli/with-parser-inference/stylesheet.css   |  4 ++++
 5 files changed, 43 insertions(+), 1 deletion(-)
 create mode 100644 tests_integration/__tests__/__snapshots__/with-parser-inference.js.snap
 create mode 100644 tests_integration/__tests__/with-parser-inference.js
 create mode 100644 tests_integration/cli/with-parser-inference/javascript.js
 create mode 100644 tests_integration/cli/with-parser-inference/stylesheet.css

diff --git a/bin/prettier.js b/bin/prettier.js
index d84e67da7..ef6dc443a 100755
--- a/bin/prettier.js
+++ b/bin/prettier.js
@@ -299,7 +299,12 @@ if (stdin) {
     }
 
     if (argv["list-different"]) {
-      if (!prettier.check(input, options)) {
+      if (
+        !prettier.check(
+          input,
+          Object.assign({}, options, { filepath: filename })
+        )
+      ) {
         if (!write) {
           console.log(filename);
         }
diff --git a/tests_integration/__tests__/__snapshots__/with-parser-inference.js.snap b/tests_integration/__tests__/__snapshots__/with-parser-inference.js.snap
new file mode 100644
index 000000000..5117e3e09
--- /dev/null
+++ b/tests_integration/__tests__/__snapshots__/with-parser-inference.js.snap
@@ -0,0 +1,13 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`infers postcss parser 1`] = `
+"/* JavaScript */
+\\"use strict\\";
+/* Stylesheet */
+* {
+  outline: none;
+}
+"
+`;
+
+exports[`infers postcss parser with --list-different 1`] = `""`;
diff --git a/tests_integration/__tests__/with-parser-inference.js b/tests_integration/__tests__/with-parser-inference.js
new file mode 100644
index 000000000..638483a00
--- /dev/null
+++ b/tests_integration/__tests__/with-parser-inference.js
@@ -0,0 +1,18 @@
+"use strict";
+
+const runPrettier = require("../runPrettier");
+
+test("infers postcss parser", () => {
+  const result = runPrettier("cli/with-parser-inference", ["*"]);
+
+  expect(result.stdout).toMatchSnapshot();
+});
+
+test("infers postcss parser with --list-different", () => {
+  const result = runPrettier("cli/with-parser-inference", [
+    "--list-different",
+    "*"
+  ]);
+
+  expect(result.stdout).toMatchSnapshot();
+});
diff --git a/tests_integration/cli/with-parser-inference/javascript.js b/tests_integration/cli/with-parser-inference/javascript.js
new file mode 100644
index 000000000..3691e5880
--- /dev/null
+++ b/tests_integration/cli/with-parser-inference/javascript.js
@@ -0,0 +1,2 @@
+/* JavaScript */
+"use strict";
diff --git a/tests_integration/cli/with-parser-inference/stylesheet.css b/tests_integration/cli/with-parser-inference/stylesheet.css
new file mode 100644
index 000000000..f2fd4cc95
--- /dev/null
+++ b/tests_integration/cli/with-parser-inference/stylesheet.css
@@ -0,0 +1,4 @@
+/* Stylesheet */
+* {
+  outline: none;
+}