fix: Make babel-plugin-minify-infinity work again. (#839)

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

@@ -1,3 +1,4 @@
 function a(Infinity) {}
 function b(...Infinity) {}
 function c({ Infinity }) {}
+function d([Infinity]) {}

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

@@ -4,4 +4,6 @@ function b(...Infinity) {}
 
 function c({
   Infinity
-}) {}
+}) {}
+
+function d([Infinity]) {}

packages/babel-plugin-minify-infinity/__tests__/fixtures/to-1-over-0/actual.js

@@ -1 +1,7 @@
 Infinity;
+[Infinity];
+let infobj = {inf: Infinity};
+func(Infinity);
+1/Infinity;
+let inf = Infinity;
+while (Infinity) break;

packages/babel-plugin-minify-infinity/__tests__/fixtures/to-1-over-0/expected.js

@@ -1 +1,10 @@
-1 / 0;
+1 / 0;
+[1 / 0];
+let infobj = {
+  inf: 1 / 0
+};
+func(1 / 0);
+1 / (1 / 0);
+let inf = 1 / 0;
+
+while (1 / 0) break;

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

@@ -6,6 +6,12 @@ module.exports = function({ types: t }) {
     t.numericLiteral(1),
     t.numericLiteral(0)
   );
+  const badTransforms = {
+    ArrayPattern: true,
+    AssignmentExpression: true,
+    //ObjectProperty: bad if path.container.shorthand is true,
+    RestElement: true
+  };
   return {
     name: "minify-infinity",
     visitor: {
@@ -28,7 +34,7 @@ module.exports = function({ types: t }) {
           return;
         }
 
-        if (path.isLVal() && !path.parentPath.isExpressionStatement()) {
+        if (path.isLVal() && (badTransforms[path.parentPath.type] || path.container.shorthand)) {
           return;
         }