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qwen/nodejs/node_modules/resolve/test/node-modules-paths.js

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+var test = require('tape');
+var path = require('path');
+var parse = path.parse || require('path-parse');
+var keys = require('object-keys');
+
+var nodeModulesPaths = require('../lib/node-modules-paths');
+
+var verifyDirs = function verifyDirs(t, start, dirs, moduleDirectories, paths) {
+    var moduleDirs = [].concat(moduleDirectories || 'node_modules');
+    if (paths) {
+        for (var k = 0; k < paths.length; ++k) {
+            moduleDirs.push(path.basename(paths[k]));
+        }
+    }
+
+    var foundModuleDirs = {};
+    var uniqueDirs = {};
+    var parsedDirs = {};
+    for (var i = 0; i < dirs.length; ++i) {
+        var parsed = parse(dirs[i]);
+        if (!foundModuleDirs[parsed.base]) { foundModuleDirs[parsed.base] = 0; }
+        foundModuleDirs[parsed.base] += 1;
+        parsedDirs[parsed.dir] = true;
+        uniqueDirs[dirs[i]] = true;
+    }
+    t.equal(keys(parsedDirs).length >= start.split(path.sep).length, true, 'there are >= dirs than "start" has');
+    var foundModuleDirNames = keys(foundModuleDirs);
+    t.deepEqual(foundModuleDirNames, moduleDirs, 'all desired module dirs were found');
+    t.equal(keys(uniqueDirs).length, dirs.length, 'all dirs provided were unique');
+
+    var counts = {};
+    for (var j = 0; j < foundModuleDirNames.length; ++j) {
+        counts[foundModuleDirs[j]] = true;
+    }
+    t.equal(keys(counts).length, 1, 'all found module directories had the same count');
+};
+
+test('node-modules-paths', function (t) {
+    t.test('no options', function (t) {
+        var start = path.join(__dirname, 'resolver');
+        var dirs = nodeModulesPaths(start);
+
+        verifyDirs(t, start, dirs);
+
+        t.end();
+    });
+
+    t.test('empty options', function (t) {
+        var start = path.join(__dirname, 'resolver');
+        var dirs = nodeModulesPaths(start, {});
+
+        verifyDirs(t, start, dirs);
+
+        t.end();
+    });
+
+    t.test('with paths=array option', function (t) {
+        var start = path.join(__dirname, 'resolver');
+        var paths = ['a', 'b'];
+        var dirs = nodeModulesPaths(start, { paths: paths });
+
+        verifyDirs(t, start, dirs, null, paths);
+
+        t.end();
+    });
+
+    t.test('with paths=function option', function (t) {
+        var paths = function paths(request, absoluteStart, getNodeModulesDirs, opts) {
+            return getNodeModulesDirs().concat(path.join(absoluteStart, 'not node modules', request));
+        };
+
+        var start = path.join(__dirname, 'resolver');
+        var dirs = nodeModulesPaths(start, { paths: paths }, 'pkg');
+
+        verifyDirs(t, start, dirs, null, [path.join(start, 'not node modules', 'pkg')]);
+
+        t.end();
+    });
+
+    t.test('with paths=function skipping node modules resolution', function (t) {
+        var paths = function paths(request, absoluteStart, getNodeModulesDirs, opts) {
+            return [];
+        };
+        var start = path.join(__dirname, 'resolver');
+        var dirs = nodeModulesPaths(start, { paths: paths });
+        t.deepEqual(dirs, [], 'no node_modules was computed');
+        t.end();
+    });
+
+    t.test('with moduleDirectory option', function (t) {
+        var start = path.join(__dirname, 'resolver');
+        var moduleDirectory = 'not node modules';
+        var dirs = nodeModulesPaths(start, { moduleDirectory: moduleDirectory });
+
+        verifyDirs(t, start, dirs, moduleDirectory);
+
+        t.end();
+    });
+
+    t.test('with 1 moduleDirectory and paths options', function (t) {
+        var start = path.join(__dirname, 'resolver');
+        var paths = ['a', 'b'];
+        var moduleDirectory = 'not node modules';
+        var dirs = nodeModulesPaths(start, { paths: paths, moduleDirectory: moduleDirectory });
+
+        verifyDirs(t, start, dirs, moduleDirectory, paths);
+
+        t.end();
+    });
+
+    t.test('with 1+ moduleDirectory and paths options', function (t) {
+        var start = path.join(__dirname, 'resolver');
+        var paths = ['a', 'b'];
+        var moduleDirectories = ['not node modules', 'other modules'];
+        var dirs = nodeModulesPaths(start, { paths: paths, moduleDirectory: moduleDirectories });
+
+        verifyDirs(t, start, dirs, moduleDirectories, paths);
+
+        t.end();
+    });
+
+    t.test('combine paths correctly on Windows', function (t) {
+        var start = 'C:\\Users\\username\\myProject\\src';
+        var paths = [];
+        var moduleDirectories = ['node_modules', start];
+        var dirs = nodeModulesPaths(start, { paths: paths, moduleDirectory: moduleDirectories });
+
+        t.equal(dirs.indexOf(path.resolve(start)) > -1, true, 'should contain start dir');
+
+        t.end();
+    });
+
+    t.test('combine paths correctly on non-Windows', { skip: process.platform === 'win32' }, function (t) {
+        var start = '/Users/username/git/myProject/src';
+        var paths = [];
+        var moduleDirectories = ['node_modules', '/Users/username/git/myProject/src'];
+        var dirs = nodeModulesPaths(start, { paths: paths, moduleDirectory: moduleDirectories });
+
+        t.equal(dirs.indexOf(path.resolve(start)) > -1, true, 'should contain start dir');
+
+        t.end();
+    });
+});