Have minify() and tests use figure_out_scope() as uglifyjs CLI does

Clarify docs, help and tests for --support-ie8 and screw_ie8=false

2 files changed, 10 insertions, 6 deletions

diff --git a/test/compress/screw-ie8.js b/test/compress/screw-ie8.js
index 0a4e2323..31c448fd 100644
--- a/test/compress/screw-ie8.js
+++ b/test/compress/screw-ie8.js
@@ -46,6 +46,8 @@ do_screw_try_catch: {
 }
 
 dont_screw_try_catch: {
+    // This test is known to generate incorrect code for screw_ie8=false.
+    // Update expected result in the event this bug is ever fixed.
     options = { screw_ie8: false };
     mangle = { screw_ie8: false };
     beautify = { screw_ie8: false };
@@ -102,6 +104,8 @@ do_screw_try_catch_undefined: {
 }
 
 dont_screw_try_catch_undefined: {
+    // This test is known to generate incorrect code for screw_ie8=false.
+    // Update expected result in the event this bug is ever fixed.
     options = { screw_ie8: false };
     mangle = { screw_ie8: false };
     beautify = { screw_ie8: false };
@@ -123,8 +127,8 @@ dont_screw_try_catch_undefined: {
             } catch (n) {
                 console.log("caught: "+n)
             }
-            console.log("undefined is " + void 0);
-            return void 0===o
+            console.log("undefined is " + n);
+            return o === n
         }
     }
 }
diff --git a/test/run-tests.js b/test/run-tests.js
index 8fb93c83..a4721399 100755
--- a/test/run-tests.js
+++ b/test/run-tests.js
@@ -70,12 +70,12 @@ function test_directory(dir) {
     return path.resolve(tests_dir, dir);
 }
 
-function as_toplevel(input) {
+function as_toplevel(input, mangle_options) {
     if (input instanceof U.AST_BlockStatement) input = input.body;
     else if (input instanceof U.AST_Statement) input = [ input ];
     else throw new Error("Unsupported input syntax");
     var toplevel = new U.AST_Toplevel({ body: input });
-    toplevel.figure_out_scope();
+    toplevel.figure_out_scope(mangle_options);
     return toplevel;
 }
 
@@ -103,11 +103,11 @@ function run_compress_tests() {
             var output_options = test.beautify || {};
             var expect;
             if (test.expect) {
-                expect = make_code(as_toplevel(test.expect), output_options);
+                expect = make_code(as_toplevel(test.expect, test.mangle), output_options);
             } else {
                 expect = test.expect_exact;
             }
-            var input = as_toplevel(test.input);
+            var input = as_toplevel(test.input, test.mangle);
             var input_code = make_code(test.input, {
                 beautify: true,
                 quote_style: 3,