1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
6 * @fileoverview Generator script for creating gtest-style JavaScript
7 * tests for extensions, WebUI and unit tests. Generates C++ gtest wrappers
8 * which will invoke the appropriate JavaScript for each test.
9 * @author scr@chromium.org (Sheridan Rawlins)
10 * @see WebUI testing: http://goo.gl/ZWFXF
11 * @see gtest documentation: http://goo.gl/Ujj3H
12 * @see chrome/chrome_tests.gypi
13 * @see tools/gypv8sh.py
16 // Arguments from rules in chrome_tests.gypi are passed in through
17 // python script gypv8sh.py.
18 if (arguments.length != 6) {
21 ' path-to-testfile.js testfile.js path_to_deps.js output.cc test-type');
26 * Full path to the test input file.
29 var jsFile = arguments[1];
32 * Relative path to the test input file appropriate for use in the
33 * C++ TestFixture's addLibrary method.
36 var jsFileBase = arguments[2];
39 * The cwd, as determined by the paths of |jsFile| and |jsFileBase|.
40 * This is usually relative to the root source directory and points to the
41 * directory where the GYP rule processing the js file lives.
43 var jsDirBase = jsFileBase.replace(jsFile, '');
46 * Path to Closure library style deps.js file.
49 var depsFile = arguments[3];
52 * Path to C++ file generation is outputting to.
55 var outputFile = arguments[4];
59 * @type {string} ('extension' | 'unit' | 'webui')
61 var testType = arguments[5];
62 if (testType != 'extension' &&
64 testType != 'webui') {
65 print('Invalid test type: ' + testType);
70 * C++ gtest macro to use for TEST_F depending on |testType|.
71 * @type {string} ('TEST_F'|'IN_PROC_BROWSER_TEST_F')
76 * Keeps track of whether a typedef has been generated for each test
78 * @type {Object.<string, string>}
80 var typedeffedCppFixtures = {};
83 * Maintains a list of relative file paths to add to each gtest body
84 * for inclusion at runtime before running each JavaScript test.
85 * @type {Array.<string>}
90 * When true, add calls to set_preload_test_(fixture|name). This is needed when
91 * |testType| === 'webui' to send an injection message before the page loads,
92 * but is not required or supported by any other test type.
95 var addSetPreloadInfo;
98 * Whether cc headers need to be generated.
101 var needGenHeader = true;
104 * Helpful hint pointing back to the source js.
107 var argHint = '// ' + this['arguments'].join(' ');
111 * Generates the header of the cc file to stdout.
112 * @param {string?} testFixture Name of test fixture.
114 function maybeGenHeader(testFixture) {
117 needGenHeader = false;
118 print('// GENERATED FILE');
120 print('// PLEASE DO NOT HAND EDIT!');
123 // Output some C++ headers based upon the |testType|.
125 // Currently supports:
126 // 'extension' - browser_tests harness, js2extension rule,
127 // ExtensionJSBrowserTest superclass.
128 // 'unit' - unit_tests harness, js2unit rule, V8UnitTest superclass.
129 // 'webui' - browser_tests harness, js2webui rule, WebUIBrowserTest
131 if (testType === 'extension') {
132 print('#include "chrome/test/base/extension_js_browser_test.h"');
133 testing.Test.prototype.typedefCppFixture = 'ExtensionJSBrowserTest';
134 addSetPreloadInfo = false;
135 testF = 'IN_PROC_BROWSER_TEST_F';
136 } else if (testType === 'unit') {
137 print('#include "chrome/test/base/v8_unit_test.h"');
138 testing.Test.prototype.typedefCppFixture = 'V8UnitTest';
140 addSetPreloadInfo = false;
142 print('#include "chrome/test/base/web_ui_browser_test.h"');
143 testing.Test.prototype.typedefCppFixture = 'WebUIBrowserTest';
144 testF = 'IN_PROC_BROWSER_TEST_F';
145 addSetPreloadInfo = true;
147 print('#include "url/gurl.h"');
148 print('#include "testing/gtest/include/gtest/gtest.h"');
149 if (testFixture && this[testFixture].prototype.testGenCppIncludes)
150 this[testFixture].prototype.testGenCppIncludes();
156 * Convert the |includeFile| to paths appropriate for immediate
157 * inclusion (path) and runtime inclusion (base).
158 * @param {string} includeFile The file to include.
159 * @return {{path: string, base: string}} Object describing the paths
160 * for |includeFile|. |path| is relative to cwd; |base| is relative to
163 function includeFileToPaths(includeFile) {
164 if (includeFile.indexOf(jsDirBase) == 0) {
165 // The caller supplied a path relative to root source.
166 var relPath = includeFile.replace(jsDirBase, '');
169 base: jsDirBase + relPath
173 // The caller supplied a path relative to the input js file's directory (cwd).
175 path: jsFile.replace(/[^\/\\]+$/, includeFile),
176 base: jsFileBase.replace(/[^\/\\]+$/, includeFile),
182 * Maps object names to the path to the file that provides them.
183 * Populated from the |depsFile| if any.
184 * @type {Object.<string, string>}
186 var dependencyProvidesToPaths = {};
189 * Maps dependency path names to object names required by the file.
190 * Populated from the |depsFile| if any.
191 * @type {Object.<string, Array.<string>>}
193 var dependencyPathsToRequires = {};
196 var goog = goog || {};
198 * Called by the javascript in the deps file to add modules and their
200 * @param {string} path Relative path to the file.
201 * @param Array.<string> provides Objects provided by this file.
202 * @param Array.<string> requires Objects required by this file.
204 goog.addDependency = function(path, provides, requires) {
205 provides.forEach(function(provide) {
206 dependencyProvidesToPaths[provide] = path;
208 dependencyPathsToRequires[path] = requires;
211 // Read and eval the deps file. It should only contain goog.addDependency
213 eval(read(depsFile));
217 * Resolves a list of libraries to an ordered list of paths to load by the
218 * generated C++. The input should contain object names provided
219 * by the deps file. Dependencies will be resolved and included in the
220 * correct order, meaning that the returned array may contain more entries
222 * @param {Array.<string>} deps List of dependencies.
223 * @return {Array.<string>} List of paths to load.
225 function resolveClosureModuleDeps(deps) {
226 if (!depsFile && deps.length > 0) {
227 print('Can\'t have closure dependencies without a deps file.');
230 var resultPaths = [];
233 function addPath(path) {
234 addedPaths[path] = true;
235 resultPaths.push(path);
238 function resolveAndAppend(path) {
239 if (addedPaths[path]) {
242 // Set before recursing to catch cycles.
243 addedPaths[path] = true;
244 dependencyPathsToRequires[path].forEach(function(require) {
245 var providingPath = dependencyProvidesToPaths[require];
246 if (!providingPath) {
247 print('Unknown object', require, 'required by', path);
250 resolveAndAppend(providingPath);
252 resultPaths.push(path);
255 // Always add closure library's base.js if provided by deps.
256 var basePath = dependencyProvidesToPaths['goog'];
261 deps.forEach(function(dep) {
262 var providingPath = dependencyProvidesToPaths[dep];
264 resolveAndAppend(providingPath);
266 print('Unknown dependency:', dep);
275 * Output |code| verbatim.
276 * @param {string} code The code to output.
279 maybeGenHeader(null);
284 * Outputs |commentEncodedCode|, converting comment to enclosed C++ code.
285 * @param {function} commentEncodedCode A function in the following format (note
286 * the space in '/ *' and '* /' should be removed to form a comment delimiter):
287 * function() {/ *! my_cpp_code.DoSomething(); * /
288 * Code between / *! and * / will be extracted and written to stdout.
290 function GEN_BLOCK(commentEncodedCode) {
291 var code = commentEncodedCode.toString().
292 replace(/^[^\/]+\/\*!?/, '').
293 replace(/\*\/[^\/]+$/, '').
294 replace(/^\n|\n$/, '').
300 * Generate includes for the current |jsFile| by including them
301 * immediately and at runtime.
302 * The paths are allowed to be:
303 * 1. relative to the root src directory (i.e. similar to #include's).
304 * 2. relative to the directory specified in the GYP rule for the file.
305 * @param {Array.<string>} includes Paths to JavaScript files to
306 * include immediately and at runtime.
308 function GEN_INCLUDE(includes) {
309 for (var i = 0; i < includes.length; i++) {
310 var includePaths = includeFileToPaths(includes[i]);
311 var js = read(includePaths.path);
312 ('global', eval)(js);
313 genIncludes.push(includePaths.base);
318 * Generate gtest-style TEST_F definitions for C++ with a body that
319 * will invoke the |testBody| for |testFixture|.|testFunction|.
320 * @param {string} testFixture The name of this test's fixture.
321 * @param {string} testFunction The name of this test's function.
322 * @param {Function} testBody The function body to execute for this test.
324 function TEST_F(testFixture, testFunction, testBody) {
325 maybeGenHeader(testFixture);
326 var browsePreload = this[testFixture].prototype.browsePreload;
327 var browsePrintPreload = this[testFixture].prototype.browsePrintPreload;
328 var testGenPreamble = this[testFixture].prototype.testGenPreamble;
329 var testGenPostamble = this[testFixture].prototype.testGenPostamble;
330 var typedefCppFixture = this[testFixture].prototype.typedefCppFixture;
331 var isAsyncParam = testType === 'unit' ? '' :
332 this[testFixture].prototype.isAsync + ', ';
333 var testShouldFail = this[testFixture].prototype.testShouldFail;
334 var testPredicate = testShouldFail ? 'ASSERT_FALSE' : 'ASSERT_TRUE';
335 var extraLibraries = genIncludes.concat(
336 this[testFixture].prototype.extraLibraries.map(
337 function(includeFile) {
338 return includeFileToPaths(includeFile).base;
340 resolveClosureModuleDeps(this[testFixture].prototype.closureModuleDeps));
342 if (typedefCppFixture && !(testFixture in typedeffedCppFixtures)) {
343 print('typedef ' + typedefCppFixture + ' ' + testFixture + ';');
344 typedeffedCppFixtures[testFixture] = typedefCppFixture;
347 print(testF + '(' + testFixture + ', ' + testFunction + ') {');
348 for (var i = 0; i < extraLibraries.length; i++) {
349 print(' AddLibrary(base::FilePath(FILE_PATH_LITERAL("' +
350 extraLibraries[i].replace(/\\/g, '/') + '")));');
352 print(' AddLibrary(base::FilePath(FILE_PATH_LITERAL("' +
353 jsFileBase.replace(/\\/g, '/') + '")));');
354 if (addSetPreloadInfo) {
355 print(' set_preload_test_fixture("' + testFixture + '");');
356 print(' set_preload_test_name("' + testFunction + '");');
359 testGenPreamble(testFixture, testFunction);
361 print(' BrowsePreload(GURL("' + browsePreload + '"));');
362 if (browsePrintPreload) {
363 print(' BrowsePrintPreload(GURL(WebUITestDataPathToURL(\n' +
364 ' FILE_PATH_LITERAL("' + browsePrintPreload + '"))));');
366 print(' ' + testPredicate + '(RunJavascriptTestF(' + isAsyncParam +
367 '"' + testFixture + '", ' +
368 '"' + testFunction + '"));');
369 if (testGenPostamble)
370 testGenPostamble(testFixture, testFunction);
375 // Now that generation functions are defined, load in |jsFile|.
376 var js = read(jsFile);