From 432b071d471fce4abec8cd312c7b80414cb4bc50 Mon Sep 17 00:00:00 2001
From: alexlamsl <alexlamsl@gmail.com>
Date: Fri, 24 Mar 2017 12:48:03 +0800
Subject: [PATCH] add tests for #1627

---
 test/input/invalid/assign_1.js |  1 +
 test/input/invalid/assign_2.js |  1 +
 test/input/invalid/assign_3.js |  1 +
 test/mocha/cli.js              | 49 ++++++++++++++++++++++++++++++++--
 4 files changed, 50 insertions(+), 2 deletions(-)
 create mode 100644 test/input/invalid/assign_1.js
 create mode 100644 test/input/invalid/assign_2.js
 create mode 100644 test/input/invalid/assign_3.js

diff --git a/test/input/invalid/assign_1.js b/test/input/invalid/assign_1.js
new file mode 100644
index 00000000..6d09d132
--- /dev/null
+++ b/test/input/invalid/assign_1.js
@@ -0,0 +1 @@
+console.log(1 || 5--);
diff --git a/test/input/invalid/assign_2.js b/test/input/invalid/assign_2.js
new file mode 100644
index 00000000..197bdc90
--- /dev/null
+++ b/test/input/invalid/assign_2.js
@@ -0,0 +1 @@
+console.log(2 || (Math.random() /= 2));
diff --git a/test/input/invalid/assign_3.js b/test/input/invalid/assign_3.js
new file mode 100644
index 00000000..7c560e4b
--- /dev/null
+++ b/test/input/invalid/assign_3.js
@@ -0,0 +1 @@
+console.log(3 || ++this);
diff --git a/test/mocha/cli.js b/test/mocha/cli.js
index a68b334c..33749045 100644
--- a/test/mocha/cli.js
+++ b/test/mocha/cli.js
@@ -251,7 +251,7 @@ describe("bin/uglifyjs", function () {
             done();
         });
     });
-    it("Should support hyphens as shorthands", function(done) {
+    it("Should support hyphen as shorthand", function(done) {
        var command = uglifyjscmd + ' test/input/issue-1431/sample.js -m keep-fnames=true';
 
        exec(command, function (err, stdout) {
@@ -260,5 +260,50 @@ describe("bin/uglifyjs", function () {
            assert.strictEqual(stdout, "function f(r){return function(){function n(n){return n*n}return r(n)}}function g(n){return n(1)+n(2)}console.log(f(g)()==5);\n");
            done();
        });
-    })
+    });
+    it("Should throw syntax error (5--)", function(done) {
+       var command = uglifyjscmd + ' test/input/invalid/assign_1.js';
+
+       exec(command, function (err, stdout, stderr) {
+           assert.ok(err);
+           assert.strictEqual(stdout, "");
+           assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+               "Parse error at test/input/invalid/assign_1.js:1,18",
+               "console.log(1 || 5--);",
+               "                  ^",
+               "SyntaxError: Invalid use of -- operator"
+           ].join("\n"));
+           done();
+       });
+    });
+    it("Should throw syntax error (Math.random() /= 2)", function(done) {
+       var command = uglifyjscmd + ' test/input/invalid/assign_2.js';
+
+       exec(command, function (err, stdout, stderr) {
+           assert.ok(err);
+           assert.strictEqual(stdout, "");
+           assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+               "Parse error at test/input/invalid/assign_2.js:1,32",
+               "console.log(2 || (Math.random() /= 2));",
+               "                                ^",
+               "SyntaxError: Invalid assignment"
+           ].join("\n"));
+           done();
+       });
+    });
+    it("Should throw syntax error (++this)", function(done) {
+       var command = uglifyjscmd + ' test/input/invalid/assign_3.js';
+
+       exec(command, function (err, stdout, stderr) {
+           assert.ok(err);
+           assert.strictEqual(stdout, "");
+           assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
+               "Parse error at test/input/invalid/assign_3.js:1,23",
+               "console.log(3 || ++this);",
+               "                       ^",
+               "SyntaxError: Invalid use of ++ operator"
+           ].join("\n"));
+           done();
+       });
+    });
 });