fix: minify infinity in expressions

packages/babel-plugin-minify-infinity/__tests__/fixtures/bindings/actual.js

@@ -0,0 +1,12 @@
+function foo() {
+  let [Infinity] = some();
+  return Infinity;
+}
+
+function bar() {
+  let [...Infinity] = some();
+}
+
+function baz() {
+  let { inf = Infinity } = some();
+}

packages/babel-plugin-minify-infinity/__tests__/fixtures/bindings/expected.js

@@ -0,0 +1,14 @@
+function foo() {
+  let [Infinity] = some();
+  return Infinity;
+}
+
+function bar() {
+  let [...Infinity] = some();
+}
+
+function baz() {
+  let {
+    inf = 1 / 0
+  } = some();
+}

packages/babel-plugin-minify-infinity/__tests__/fixtures/expressions/actual.js

@@ -0,0 +1,10 @@
+let x = [Infinity, Infinity];
+
+let y = [
+  {
+    a: Infinity
+  },
+  {
+    a: Infinity
+  }
+];

packages/babel-plugin-minify-infinity/__tests__/fixtures/expressions/expected.js

@@ -0,0 +1,6 @@
+let x = [1 / 0, 1 / 0];
+let y = [{
+  a: Infinity
+}, {
+  a: Infinity
+}];

packages/babel-plugin-minify-infinity/src/index.js

@@ -28,8 +28,12 @@ module.exports = function({ types: t }) {
           return;
         }
 
-        if (path.isLVal() && !path.parentPath.isExpressionStatement()) {
-          return;
+        const bindingIds = path.parentPath.getBindingIdentifierPaths();
+
+        for (const id of Object.keys(bindingIds)) {
+          if (id === "Infinity" && bindingIds[id] === path) {
+            return;
+          }
         }
 
         path.replaceWith(INFINITY);