JavaScript: Fix inconsistent indentation in switch statement (#6514)

* Add "SwitchStatement" to isInsideParenthesis

* Change tests

* Add tests

* Update CHANGELOG.unreleased.md

* Add pr number and link

CHANGELOG.unreleased.md

@@ -626,6 +626,43 @@ return (
 );
 ```
 
+#### JavaScript: Fix inconsistent indentation in switch statement ([#6514] by [@sosukesuzuki])
+
+<!-- prettier-ignore -->
+```js
+// Input
+switch ($veryLongAndVeryVerboseVariableName && $anotherVeryLongAndVeryVerboseVariableName) {
+}
+
+switch ($longButSlightlyShorterVariableName && $anotherSlightlyShorterVariableName) {
+}
+
+// Prettier (stable)
+switch (
+  $veryLongAndVeryVerboseVariableName &&
+    $anotherVeryLongAndVeryVerboseVariableName
+) {
+}
+
+switch (
+  $longButSlightlyShorterVariableName && $anotherSlightlyShorterVariableName
+) {
+}
+
+// Prettier (master)
+switch (
+  $veryLongAndVeryVerboseVariableName &&
+  $anotherVeryLongAndVeryVerboseVariableName
+) {
+}
+
+switch (
+  $longButSlightlyShorterVariableName &&
+  $anotherSlightlyShorterVariableName
+) {
+}
+```
+
 [#5910]: https://github.com/prettier/prettier/pull/5910
 [#6186]: https://github.com/prettier/prettier/pull/6186
 [#6206]: https://github.com/prettier/prettier/pull/6206
@@ -648,6 +685,7 @@ return (
 [#6441]: https://github.com/prettier/prettier/pull/6441
 [#6446]: https://github.com/prettier/prettier/pull/6446
 [#6506]: https://github.com/prettier/prettier/pull/6506
+[#6514]: https://github.com/prettier/prettier/pull/6514
 [@duailibe]: https://github.com/duailibe
 [@gavinjoyce]: https://github.com/gavinjoyce
 [@sosukesuzuki]: https://github.com/sosukesuzuki

src/language-js/printer-estree.js

@@ -544,6 +544,7 @@ function printPathNoParens(path, options, print, args) {
         n !== parent.body &&
         (parent.type === "IfStatement" ||
           parent.type === "WhileStatement" ||
+          parent.type === "SwitchStatement" ||
           parent.type === "DoWhileStatement");
 
       const parts = printBinaryishExpressions(

tests/switch/__snapshots__/jsfmt.spec.js.snap

@@ -288,6 +288,12 @@ switch (veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVery
     alert( 'default' );
 }
 
+switch ($veryLongAndVeryVerboseVariableName && $anotherVeryLongAndVeryVerboseVariableName) {
+}
+
+switch ($longButSlightlyShorterVariableName && $anotherSlightlyShorterVariableName) {
+}
+
 =====================================output=====================================
 switch (a) {
   case 3:
@@ -315,7 +321,7 @@ switch (
 
 switch (
   veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLong >
-    veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLong
+  veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLong
 ) {
   case 3:
     alert("3");
@@ -324,5 +330,17 @@ switch (
     alert("default");
 }
 
+switch (
+  $veryLongAndVeryVerboseVariableName &&
+  $anotherVeryLongAndVeryVerboseVariableName
+) {
+}
+
+switch (
+  $longButSlightlyShorterVariableName &&
+  $anotherSlightlyShorterVariableName
+) {
+}
+
 ================================================================================
 `;

tests/switch/switch.js

@@ -27,3 +27,9 @@ switch (veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVery
   default:
     alert( 'default' );
 }
+
+switch ($veryLongAndVeryVerboseVariableName && $anotherVeryLongAndVeryVerboseVariableName) {
+}
+
+switch ($longButSlightlyShorterVariableName && $anotherSlightlyShorterVariableName) {
+}