Merge pull request #5758 from STRML/test-react-constant-elements-unreferenced-param

Add regression test for transform-react-constant-elements (#5552)

packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/class-assign-unreferenced-param-deopt/actual.js

@@ -0,0 +1,16 @@
+import React from 'react';
+
+// Regression test for https://github.com/babel/babel/issues/5552
+class BugReport extends React.Component {
+    thisWontWork = ({ color }) => (data) => {
+        return <div color={ color }>does not reference data</div>;
+    };
+
+    thisWorks = ({ color }) => (data) => {
+        return <div color={ color }>{ data }</div>;
+    };
+
+    render() {
+        return <div />
+    }
+}

packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/class-assign-unreferenced-param-deopt/expected.js

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+import React from 'react';
+
+// Regression test for https://github.com/babel/babel/issues/5552
+
+var _ref = <div />;
+
+class BugReport extends React.Component {
+    constructor(...args) {
+        var _temp;
+
+        return _temp = super(...args), this.thisWontWork = ({ color }) => data => {
+            return <div color={color}>does not reference data</div>;
+        }, this.thisWorks = ({ color }) => data => {
+            return <div color={color}>{data}</div>;
+        }, _temp;
+    }
+
+    render() {
+        return _ref;
+    }
+}

packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/class-assign-unreferenced-param-deopt/options.json

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+{
+  "plugins": ["transform-class-properties", "transform-react-constant-elements", "syntax-jsx"]
+}