implement --expression (#5607)

test/mocha/cli.js

@@ -53,6 +53,23 @@ describe("bin/uglifyjs", function() {
             done();
         });
     });
+    it("Should work with --expression", function(done) {
+        exec([
+            uglifyjscmd,
+            "--expression",
+            "--compress",
+            "--mangle",
+        ].join(" "), function(err, stdout) {
+            if (err) throw err;
+            assert.strictEqual(stdout, "function(n){for(;n(););return 42}(A)\n");
+            done();
+        }).stdin.end([
+            "function(x) {",
+            "    while (x()) {}",
+            "    return 42;",
+            "}(A)",
+        ].join("\n"));
+    });
     it("Should work with --source-map names=true", function(done) {
         exec([
             uglifyjscmd,
@@ -69,7 +86,7 @@ describe("bin/uglifyjs", function() {
                 "    q: b",
                 "};",
                 "//# sourceMappingURL=data:application/json;charset=utf-8;base64,",
-            ].join("\n")
+            ].join("\n");
             assert.strictEqual(stdout.slice(0, expected.length), expected);
             var map = JSON.parse(to_ascii(stdout.slice(expected.length).trim()));
             assert.deepEqual(map.names, [ "obj", "p", "a", "q", "b" ]);
@@ -97,7 +114,7 @@ describe("bin/uglifyjs", function() {
                 "    q: b",
                 "};",
                 "//# sourceMappingURL=data:application/json;charset=utf-8;base64,",
-            ].join("\n")
+            ].join("\n");
             assert.strictEqual(stdout.slice(0, expected.length), expected);
             var map = JSON.parse(to_ascii(stdout.slice(expected.length).trim()));
             assert.deepEqual(map.names, []);

test/mocha/number-literal.js

@@ -50,12 +50,10 @@ describe("Number literals", function() {
             "0.000_000_004_2e+1_0-0B101_010+0x2_A-0o5_2+4_2",
         ].forEach(function(code) {
             var result = UglifyJS.minify(code, {
-                compress: {
-                    expression: true,
-                },
+                expression: true,
             });
             if (result.error) throw result.error;
-            assert.strictEqual(result.code, "42;");
+            assert.strictEqual(result.code, "42");
         });
     });
     it("Should reject invalid use of underscore", function() {