Issue 6625 - Expose webpack's resolve.alias to the packagers

tests/test_packagerWebExt.py

 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 import difflib
 import json
 import os
 import re
 import shutil
 import zipfile
@@ skipping 212 matching lines @@
 def keyfile(tmpdir):
     """Test-privatekey for signing chrome release-package."""
     return os.path.join(os.path.dirname(__file__), 'chrome_rsa.pem')
 
 
 @pytest.fixture
 def lib_files(tmpdir):
     files = packager.Files(['lib'], set())
     files['ext/a.js'] = 'require("./c.js");\nrequire("info");\nvar bar;'
     files['lib/b.js'] = 'var foo;'
+    files['lib/aliased.js'] = 'require("mogo");'
+    files['lib/mogo.js'] = 'var this_is_mogo;'
+    files['lib/edge.js'] = 'var this_is_edge;'
     files['ext/c.js'] = 'var this_is_c;'
+    files['ext/alias_c.js'] = 'var this_is_aliased_c;'
     files['qunit/common.js'] = 'var qunit = {};'
     files['qunit/tests/some_test.js'] = 'var passed = true;'
 
-    tmpdir.mkdir('lib').join('b.js').write(files['lib/b.js'])
+    libdir = tmpdir.mkdir('lib')
+    libdir.join('b.js').write(files['lib/b.js'])
+    libdir.join('aliased.js').write(files['lib/aliased.js'])
+    libdir.join('mogo.js').write(files['lib/mogo.js'])
+    libdir.join('edge.js').write(files['lib/edge.js'])
     ext_dir = tmpdir.mkdir('ext')
     ext_dir.join('a.js').write(files['ext/a.js'])
     ext_dir.join('c.js').write(files['ext/c.js'])
     qunit_dir = tmpdir.mkdir('qunit')
     qunit_dir.join('common.js').write(files['qunit/common.js'])
     qunit_tests_dir = qunit_dir.mkdir('tests')
     qunit_tests_dir.join('some_test.js').write(
         files['qunit/tests/some_test.js'],
     )
     return files
@@ skipping 45 matching lines @@
     if is_devbuild:
         assert 'addonVersion = "1.2.3.1337";' in libfoo
     else:
         assert 'addonVersion = "1.2.3";' in libfoo
 
     assert 'webpack:///./ext/a.js' in libfoomap
 
     assert 'var this_is_c;' in libfoo
     assert 'webpack:///./ext/c.js' in libfoomap
 
+    if prefix:  # webpack 'resolve.alias' exposure
+        assert 'var this_is_edge;' in libfoo
+        assert 'webpack:///./lib/edge.js' in libfoomap
+    else:
+        assert 'var this_is_mogo;' in libfoo
+        assert 'webpack:///./lib/mogo.js' in libfoomap
+
     assert ('var foo;' in libfoo) != excluded
     assert ('webpack:///./lib/b.js' in libfoomap) != excluded
 
 
 def assert_devenv_scripts(package, prefix, devenv):
     manifest = json.loads(package.read(os.path.join(prefix, 'manifest.json')))
     filenames = package.namelist()
     scripts = [
         'ext/common.js',
         'ext/background.js',
@@ skipping 161 matching lines @@
             expected = os.path.join(
                 os.path.dirname(__file__),
                 'expecteddata',
                 filename.format(name, ext),
             )
 
             assert_manifest_content(
                 package.read(os.path.join(folder, '{}.{}'.format(name, ext))),
                 expected,
             )