diff options
Diffstat (limited to 'js/compatibility_tests/v3.0.0/commonjs/rewrite_tests_for_commonjs.js')
-rw-r--r-- | js/compatibility_tests/v3.0.0/commonjs/rewrite_tests_for_commonjs.js | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/js/compatibility_tests/v3.0.0/commonjs/rewrite_tests_for_commonjs.js b/js/compatibility_tests/v3.0.0/commonjs/rewrite_tests_for_commonjs.js new file mode 100644 index 00000000..b6d90d28 --- /dev/null +++ b/js/compatibility_tests/v3.0.0/commonjs/rewrite_tests_for_commonjs.js @@ -0,0 +1,97 @@ +/** + * @fileoverview Utility to translate test files to CommonJS imports. + * + * This is a somewhat hacky tool designed to do one very specific thing. + * All of the test files in *_test.js are written with Closure-style + * imports (goog.require()). This works great for running the tests + * against Closure-style generated code, but we also want to run the + * tests against CommonJS-style generated code without having to fork + * the tests. + * + * Closure-style imports import each individual type by name. This is + * very different than CommonJS imports which are by file. So we put + * special comments in these tests like: + * + * // CommonJS-LoadFromFile: test_pb + * goog.require('proto.jspb.test.CloneExtension'); + * goog.require('proto.jspb.test.Complex'); + * goog.require('proto.jspb.test.DefaultValues'); + * + * This script parses that special comment and uses it to generate proper + * CommonJS require() statements so that the tests can run and pass using + * CommonJS imports. The script will change the above statements into: + * + * var test_pb = require('test_pb'); + * googleProtobuf.exportSymbol('proto.jspb.test.CloneExtension', test_pb.CloneExtension, global); + * googleProtobuf.exportSymbol('proto.jspb.test.Complex', test_pb.Complex, global); + * googleProtobuf.exportSymbol('proto.jspb.test.DefaultValues', test_pb.DefaultValues, global); + * + * (The "exportSymbol" function will define the given names in the global + * namespace, taking care not to overwrite any previous value for + * "proto.jspb.test"). + */ + +var lineReader = require('readline').createInterface({ + input: process.stdin, + output: process.stdout +}); + +function tryStripPrefix(str, prefix) { + if (str.lastIndexOf(prefix) !== 0) { + throw "String: " + str + " didn't start with: " + prefix; + } + return str.substr(prefix.length); +} + +function camelCase(str) { + var ret = ''; + var ucaseNext = false; + for (var i = 0; i < str.length; i++) { + if (str[i] == '-') { + ucaseNext = true; + } else if (ucaseNext) { + ret += str[i].toUpperCase(); + ucaseNext = false; + } else { + ret += str[i]; + } + } + return ret; +} + +var module = null; +var pkg = null; + +// Header: goes in every file at the top. +console.log("var global = Function('return this')();"); +console.log("var googleProtobuf = require('google-protobuf');"); +console.log("var testdeps = require('testdeps_commonjs');"); +console.log("global.goog = testdeps.goog;"); +console.log("global.jspb = testdeps.jspb;"); +console.log("var asserts = require('closure_asserts_commonjs');"); +console.log(""); +console.log("// Bring asserts into the global namespace."); +console.log("googleProtobuf.object.extend(global, asserts);"); + +lineReader.on('line', function(line) { + var isRequire = line.match(/goog\.require\('([^']*)'\)/); + var isLoadFromFile = line.match(/CommonJS-LoadFromFile: (\S*) (.*)/); + var isSetTestOnly = line.match(/goog.setTestOnly()/); + if (isRequire) { + if (module) { // Skip goog.require() lines before the first directive. + var fullSym = isRequire[1]; + var sym = tryStripPrefix(fullSym, pkg); + console.log("googleProtobuf.exportSymbol('" + fullSym + "', " + module + sym + ', global);'); + } + } else if (isLoadFromFile) { + var module_path = isLoadFromFile[1].split('/'); + module = camelCase(module_path[module_path.length - 1]); + pkg = isLoadFromFile[2]; + + if (module != "googleProtobuf") { // We unconditionally require this in the header. + console.log("var " + module + " = require('./" + isLoadFromFile[1] + "');"); + } + } else if (!isSetTestOnly) { // Remove goog.setTestOnly() lines. + console.log(line); + } +}); |