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qwen/nodejs/node_modules/resolve/test/symlinks.js

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+var path = require('path');
+var fs = require('fs');
+var test = require('tape');
+var map = require('array.prototype.map');
+var resolve = require('../');
+
+var symlinkDir = path.join(__dirname, 'resolver', 'symlinked', 'symlink');
+var packageDir = path.join(__dirname, 'resolver', 'symlinked', '_', 'node_modules', 'package');
+var modADir = path.join(__dirname, 'symlinks', 'source', 'node_modules', 'mod-a');
+var symlinkModADir = path.join(__dirname, 'symlinks', 'dest', 'node_modules', 'mod-a');
+try {
+    fs.unlinkSync(symlinkDir);
+} catch (err) {}
+try {
+    fs.unlinkSync(packageDir);
+} catch (err) {}
+try {
+    fs.unlinkSync(modADir);
+} catch (err) {}
+try {
+    fs.unlinkSync(symlinkModADir);
+} catch (err) {}
+
+try {
+    fs.symlinkSync('./_/symlink_target', symlinkDir, 'dir');
+} catch (err) {
+    // if fails then it is probably on Windows and lets try to create a junction
+    fs.symlinkSync(path.join(__dirname, 'resolver', 'symlinked', '_', 'symlink_target') + '\\', symlinkDir, 'junction');
+}
+try {
+    fs.symlinkSync('../../package', packageDir, 'dir');
+} catch (err) {
+    // if fails then it is probably on Windows and lets try to create a junction
+    fs.symlinkSync(path.join(__dirname, '..', '..', 'package') + '\\', packageDir, 'junction');
+}
+try {
+    fs.symlinkSync('../../source/node_modules/mod-a', symlinkModADir, 'dir');
+} catch (err) {
+    // if fails then it is probably on Windows and lets try to create a junction
+    fs.symlinkSync(path.join(__dirname, '..', '..', 'source', 'node_modules', 'mod-a') + '\\', symlinkModADir, 'junction');
+}
+
+test('symlink', function (t) {
+    t.plan(2);
+
+    resolve('foo', { basedir: symlinkDir, preserveSymlinks: false }, function (err, res, pkg) {
+        t.error(err);
+        t.equal(res, path.join(__dirname, 'resolver', 'symlinked', '_', 'node_modules', 'foo.js'));
+    });
+});
+
+test('sync symlink when preserveSymlinks = true', function (t) {
+    t.plan(4);
+
+    resolve('foo', { basedir: symlinkDir }, function (err, res, pkg) {
+        t.ok(err, 'there is an error');
+        t.notOk(res, 'no result');
+
+        t.equal(err && err.code, 'MODULE_NOT_FOUND', 'error code matches require.resolve');
+        t.equal(
+            err && err.message,
+            'Cannot find module \'foo\' from \'' + symlinkDir + '\'',
+            'can not find nonexistent module'
+        );
+    });
+});
+
+test('sync symlink', function (t) {
+    var start = new Date();
+    t.doesNotThrow(function () {
+        t.equal(
+            resolve.sync('foo', { basedir: symlinkDir, preserveSymlinks: false }),
+            path.join(__dirname, 'resolver', 'symlinked', '_', 'node_modules', 'foo.js')
+        );
+    });
+    t.ok(new Date() - start < 50, 'resolve.sync timedout');
+    t.end();
+});
+
+test('sync symlink when preserveSymlinks = true', function (t) {
+    t.throws(function () {
+        resolve.sync('foo', { basedir: symlinkDir });
+    }, /Cannot find module 'foo'/);
+    t.end();
+});
+
+test('sync symlink from node_modules to other dir when preserveSymlinks = false', function (t) {
+    var basedir = path.join(__dirname, 'resolver', 'symlinked', '_');
+    var fn = resolve.sync('package', { basedir: basedir, preserveSymlinks: false });
+
+    t.equal(fn, path.resolve(__dirname, 'resolver/symlinked/package/bar.js'));
+    t.end();
+});
+
+test('async symlink from node_modules to other dir when preserveSymlinks = false', function (t) {
+    t.plan(2);
+    var basedir = path.join(__dirname, 'resolver', 'symlinked', '_');
+    resolve('package', { basedir: basedir, preserveSymlinks: false }, function (err, result) {
+        t.notOk(err, 'no error');
+        t.equal(result, path.resolve(__dirname, 'resolver/symlinked/package/bar.js'));
+    });
+});
+
+test('packageFilter', function (t) {
+    function relative(x) {
+        return path.relative(__dirname, x);
+    }
+
+    function testPackageFilter(preserveSymlinks) {
+        return function (st) {
+            st.plan('is 1.x' ? 3 : 5); // eslint-disable-line no-constant-condition
+
+            var destMain = 'symlinks/dest/node_modules/mod-a/index.js';
+            var destPkg = 'symlinks/dest/node_modules/mod-a/package.json';
+            var sourceMain = 'symlinks/source/node_modules/mod-a/index.js';
+            var sourcePkg = 'symlinks/source/node_modules/mod-a/package.json';
+            var destDir = path.join(__dirname, 'symlinks', 'dest');
+
+            /* eslint multiline-comment-style: 0 */
+            /* v2.x will restore these tests
+            var packageFilterPath = [];
+            var actualPath = resolve.sync('mod-a', {
+                basedir: destDir,
+                preserveSymlinks: preserveSymlinks,
+                packageFilter: function (pkg, pkgfile, dir) {
+                    packageFilterPath.push(pkgfile);
+                }
+            });
+            st.equal(
+                relative(actualPath),
+                path.normalize(preserveSymlinks ? destMain : sourceMain),
+                'sync: actual path is correct'
+            );
+            st.deepEqual(
+                map(packageFilterPath, relative),
+                map(preserveSymlinks ? [destPkg, destPkg] : [sourcePkg, sourcePkg], path.normalize),
+                'sync: packageFilter pkgfile arg is correct'
+            );
+            */
+
+            var asyncPackageFilterPath = [];
+            resolve(
+                'mod-a',
+                {
+                    basedir: destDir,
+                    preserveSymlinks: preserveSymlinks,
+                    packageFilter: function (pkg, pkgfile) {
+                        asyncPackageFilterPath.push(pkgfile);
+                    }
+                },
+                function (err, actualPath) {
+                    st.error(err, 'no error');
+                    st.equal(
+                        relative(actualPath),
+                        path.normalize(preserveSymlinks ? destMain : sourceMain),
+                        'async: actual path is correct'
+                    );
+                    st.deepEqual(
+                        map(asyncPackageFilterPath, relative),
+                        map(
+                            preserveSymlinks ? [destPkg, destPkg, destPkg] : [sourcePkg, sourcePkg, sourcePkg],
+                            path.normalize
+                        ),
+                        'async: packageFilter pkgfile arg is correct'
+                    );
+                }
+            );
+        };
+    }
+
+    t.test('preserveSymlinks: false', testPackageFilter(false));
+
+    t.test('preserveSymlinks: true', testPackageFilter(true));
+
+    t.end();
+});