fix LHS cases for NaN & friends (#1804)

`Infinity = beyond` should not become `1/0 = beyond`
2017-04-09 03:18:14 +08:00
parent 9a978843f5
commit d6fbc365e2
2 changed files with 47 additions and 20 deletions
--- a/test/compress/evaluate.js
+++ b/test/compress/evaluate.js
@@ -957,3 +957,35 @@ delete_binary_2: {
    }
    expect_stdout: true
 }
+
+Infinity_NaN_undefined_LHS: {
+    beautify = {
+        beautify: true,
+    }
+    input: {
+        function f() {
+            Infinity = Infinity;
+            ++Infinity;
+            Infinity--;
+            NaN *= NaN;
+            ++NaN;
+            NaN--;
+            undefined |= undefined;
+            ++undefined;
+            undefined--;
+        }
+    }
+    expect_exact: [
+        "function f() {",
+        "    Infinity = 1 / 0;",
+        "    ++Infinity;",
+        "    Infinity--;",
+        "    NaN *= NaN;",
+        "    ++NaN;",
+        "    NaN--;",
+        "    undefined |= void 0;",
+        "    ++undefined;",
+        "    undefined--;",
+        "}",
+    ]
+}