Break class expression returned by arrow call (#1464)

src/printer.js

@@ -376,7 +376,6 @@ function genericPrintNoParens(path, options, print, args) {
         n.body.type === "BlockStatement" ||
         n.body.type === "TaggedTemplateExpression" ||
         n.body.type === "TemplateElement" ||
-        n.body.type === "ClassExpression" ||
         n.body.type === "ArrowFunctionExpression"
       ) {
         return group(collapsed);

tests/arrow-call/__snapshots__/jsfmt.spec.js.snap

@@ -38,6 +38,11 @@ func(
   veryLooooooooooooooooooooooooongName =>
     veryLoooooooooooooooongName.something()
 );
+
+const composition = (ViewComponent, ContainerComponent) =>
+  class extends React.Component {
+    static propTypes = {};
+  };
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 const testResults = results.testResults.map(testResult =>
   formatResult(testResult, formatter, reporter)
@@ -83,6 +88,11 @@ func(
     veryLoooooooooooooooongName.something()
 );
 
+const composition = (ViewComponent, ContainerComponent) =>
+  class extends React.Component {
+    static propTypes = {};
+  };
+
 `;
 
 exports[`arrow_call.js 2`] = `
@@ -123,6 +133,11 @@ func(
   veryLooooooooooooooooooooooooongName =>
     veryLoooooooooooooooongName.something()
 );
+
+const composition = (ViewComponent, ContainerComponent) =>
+  class extends React.Component {
+    static propTypes = {};
+  };
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 const testResults = results.testResults.map(testResult =>
   formatResult(testResult, formatter, reporter),
@@ -168,4 +183,9 @@ func(
     veryLoooooooooooooooongName.something(),
 );
 
+const composition = (ViewComponent, ContainerComponent) =>
+  class extends React.Component {
+    static propTypes = {};
+  };
+
 `;

tests/arrow-call/arrow_call.js

@@ -35,3 +35,8 @@ func(
   veryLooooooooooooooooooooooooongName =>
     veryLoooooooooooooooongName.something()
 );
+
+const composition = (ViewComponent, ContainerComponent) =>
+  class extends React.Component {
+    static propTypes = {};
+  };

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

@@ -229,11 +229,12 @@ function render() {
 
 jest.mock(
   "../SearchSource",
-  () => class {
-    findMatchingTests(pattern) {
-      return { paths: [] };
+  () =>
+    class {
+      findMatchingTests(pattern) {
+        return { paths: [] };
+      }
     }
-  }
 );
 
 `;