update

node_modules/dependency-tree/test/example/amd/a.js

@@ -0,0 +1,8 @@
+define([
+  './b',
+  './c'
+], function(b, c) {
+  'use strict';
+
+  return 'cool';
+});

node_modules/dependency-tree/test/example/amd/b.js

@@ -0,0 +1,7 @@
+define([
+  './c'
+], function(c) {
+  'use strict';
+
+  return c;
+});

node_modules/dependency-tree/test/example/amd/c.js

@@ -0,0 +1 @@
+define({});

node_modules/dependency-tree/test/example/commonjs/a.js

@@ -0,0 +1,2 @@
+var b = require('./b');
+var c = require('./c');

node_modules/dependency-tree/test/example/commonjs/b.js

@@ -0,0 +1,3 @@
+var path = require('path');
+
+module.exports = {};

node_modules/dependency-tree/test/example/commonjs/c.js

@@ -0,0 +1,3 @@
+var fs = require('fs');
+
+module.exports = {};

node_modules/dependency-tree/test/example/extended/a.js

@@ -0,0 +1,2 @@
+var b = require('./b');
+var c = require('./c');

node_modules/dependency-tree/test/example/extended/b.js

@@ -0,0 +1,2 @@
+var d = require('./d');
+var e = require('./e');

node_modules/dependency-tree/test/example/extended/c.js

@@ -0,0 +1,2 @@
+var f = require('./f');
+var g = require('./g');

node_modules/dependency-tree/test/example/onlyRealDeps/a.js

@@ -0,0 +1,3 @@
+var path = require('path');
+var debug = require('debug');
+var notReal = require('not-real');

node_modules/dependency-tree/test/example/ts/.tsconfig

@@ -0,0 +1,6 @@
+{
+  "version": "1.0.0",
+  "compilerOptions": {
+    "module": "commonjs"
+  }
+}

node_modules/dependency-tree/test/example/ts/a.ts

@@ -0,0 +1,2 @@
+import b from './b';
+import c from './c';

node_modules/dependency-tree/test/example/ts/b.ts

@@ -0,0 +1 @@
+export default function() {};

node_modules/dependency-tree/test/example/ts/c.ts

@@ -0,0 +1 @@
+export default function() {};

node_modules/dependency-tree/test/example/ts/d.tsx

@@ -0,0 +1,3 @@
+import c from './c';
+
+export default <div>Hi</div>;

node_modules/dependency-tree/test/example/webpack/aliased.js

@@ -0,0 +1 @@
+var foo = require('F');

node_modules/dependency-tree/test/example/webpack/unaliased.js

@@ -0,0 +1 @@
+var cabinet = require('filing-cabinet');

node_modules/dependency-tree/test/test.js

@@ -0,0 +1,906 @@
+import assert from 'assert';
+import sinon from 'sinon';
+import mockfs from 'mock-fs';
+import path from 'path';
+import precinct from 'precinct';
+import rewire from 'rewire';
+import Config from '../lib/Config';
+
+const dependencyTree = rewire('../');
+
+describe('dependencyTree', function() {
+  this.timeout(8000);
+  function testTreesForFormat(format, ext = '.js') {
+    it('returns an object form of the dependency tree for a file', function() {
+      const root = `${__dirname}/example/${format}`;
+      const filename = `${root}/a${ext}`;
+
+      const tree = dependencyTree({filename, root});
+
+      assert(tree instanceof Object);
+
+      const aSubTree = tree[filename];
+
+      assert.ok(aSubTree instanceof Object);
+      const filesInSubTree = Object.keys(aSubTree);
+
+      assert.equal(filesInSubTree.length, 2);
+    });
+  }
+
+  function mockStylus() {
+    mockfs({
+      [__dirname + '/example/stylus']: {
+        'a.styl': `
+          @import "b"
+          @require "c.styl"
+        `,
+        'b.styl': '@import "c"',
+        'c.styl': ''
+      }
+    });
+  }
+
+  function mockSass() {
+    mockfs({
+      [__dirname + '/example/sass']: {
+        'a.scss': `
+          @import "_b";
+          @import "_c.scss";
+        `,
+        '_b.scss': 'body { color: blue; }',
+        '_c.scss': 'body { color: pink; }'
+      }
+    });
+  }
+
+  function mockLess() {
+    mockfs({
+      [__dirname + '/example/less']: {
+        'a.less': `
+          @import "b.css";
+          @import "c.less";
+        `,
+        'b.css': 'body { color: blue; }',
+        'c.less': 'body { color: pink; }'
+      }
+    });
+  }
+
+  function mockes6() {
+    mockfs({
+      [__dirname + '/example/es6']: {
+        'a.js': `
+          import b from './b';
+          import c from './c';
+        `,
+        'b.js': 'export default function() {};',
+        'c.js': 'export default function() {};',
+        'jsx.js': `import c from './c';\n export default <jsx />;`,
+        'foo.jsx': `import React from 'react';\n import b from 'b';\n export default <jsx />;`,
+        'es7.js': `import c from './c';\n export default async function foo() {};`
+      }
+    });
+  }
+
+  afterEach(function() {
+    mockfs.restore();
+  });
+
+  it('returns an empty object for a non-existent filename', function() {
+    mockfs({
+      imaginary: {}
+    });
+
+    const root = __dirname + '/imaginary';
+    const filename = root + '/notafile.js';
+    const tree = dependencyTree({filename, root});
+
+    assert(tree instanceof Object);
+    assert(!Object.keys(tree).length);
+  });
+
+  it('handles nested tree structures', function() {
+    const directory = __dirname + '/example/extended';
+    const filename = directory + '/a.js';
+
+    const tree = dependencyTree({filename, directory});
+    assert(tree[filename] instanceof Object);
+
+    // b and c
+    const subTree = tree[filename];
+    assert.equal(Object.keys(subTree).length, 2);
+
+    const bTree = subTree[directory + '/b.js'];
+    const cTree = subTree[directory + '/c.js'];
+    // d and e
+    assert.equal(Object.keys(bTree).length, 2);
+    // f ang g
+    assert.equal(Object.keys(cTree).length, 2);
+  });
+
+  it('does not include files that are not real (#13)', function() {
+    mockfs({
+      [__dirname + '/onlyRealDeps']: {
+        'a.js': 'var notReal = require("./notReal");'
+      }
+    });
+
+    const directory = __dirname + '/onlyRealDeps';
+    const filename = directory + '/a.js';
+
+    const tree = dependencyTree({filename, directory});
+    const subTree = tree[filename];
+
+    assert.ok(!Object.keys(subTree).some(dep => dep.indexOf('notReal') !== -1));
+  });
+
+  it('does not choke on cyclic dependencies', function() {
+    mockfs({
+      [__dirname + '/cyclic']: {
+        'a.js': 'var b = require("./b");',
+        'b.js': 'var a = require("./a");'
+      }
+    });
+
+    const directory = __dirname + '/cyclic';
+    const filename = directory + '/a.js';
+
+    const spy = sinon.spy(dependencyTree, '_getDependencies');
+
+    const tree = dependencyTree({filename, directory});
+
+    assert(spy.callCount === 2);
+    assert(Object.keys(tree[filename]).length);
+
+    dependencyTree._getDependencies.restore();
+  });
+
+  it('excludes Nodejs core modules by default', function() {
+    const directory = __dirname + '/example/commonjs';
+    const filename = directory + '/b.js';
+
+    const tree = dependencyTree({filename, directory});
+    assert(Object.keys(tree[filename]).length === 0);
+    assert(Object.keys(tree)[0].indexOf('b.js') !== -1);
+  });
+
+  it('traverses installed 3rd party node modules', function() {
+    const directory = __dirname + '/example/onlyRealDeps';
+    const filename = directory + '/a.js';
+
+    const tree = dependencyTree({filename, directory});
+    const subTree = tree[filename];
+
+    assert(Object.keys(subTree).some(dep => dep === require.resolve('debug')));
+  });
+
+  it('returns a list of absolutely pathed files', function() {
+    const directory = __dirname + '/example/commonjs';
+    const filename = directory + '/b.js';
+
+    const tree = dependencyTree({filename, directory});
+
+    for (let node in tree.nodes) {
+      assert(node.indexOf(process.cwd()) !== -1);
+    }
+  });
+
+  it('excludes duplicate modules from the tree', function() {
+    mockfs({
+      root: {
+        // More than one module includes c
+        'a.js': `import b from "b";
+                 import c from "c";`,
+        'b.js': 'import c from "c";',
+        'c.js': 'export default 1;'
+      }
+    });
+
+    const tree = dependencyTree.toList({
+      filename: 'root/a.js',
+      directory: 'root'
+    });
+
+    assert(tree.length === 3);
+  });
+
+  describe('when given a detective configuration', function() {
+    it('passes it through to precinct', function() {
+      const spy = sinon.spy(precinct, 'paperwork');
+      const directory = __dirname + '/example/onlyRealDeps';
+      const filename = directory + '/a.js';
+      const detectiveConfig = {
+        amd: {
+          skipLazyLoaded: true
+        }
+      };
+
+      dependencyTree({
+        filename,
+        directory,
+        detective: detectiveConfig
+      });
+
+      assert.ok(spy.calledWith(filename, detectiveConfig));
+      spy.restore();
+    });
+  });
+
+  describe('when given a list to store non existent partials', function() {
+    describe('and the file contains no valid partials', function() {
+      it('stores the invalid partials', function() {
+        mockfs({
+          [__dirname + '/onlyRealDeps']: {
+            'a.js': 'var notReal = require("./notReal");'
+          }
+        });
+
+        const directory = __dirname + '/onlyRealDeps';
+        const filename = directory + '/a.js';
+        const nonExistent = [];
+
+        const tree = dependencyTree({filename, directory, nonExistent});
+
+        assert.equal(nonExistent.length, 1);
+        assert.equal(nonExistent[0], './notReal');
+      });
+    });
+
+    describe('and the file contains all valid partials', function() {
+      it('does not store anything', function() {
+        mockfs({
+          [__dirname + '/onlyRealDeps']: {
+            'a.js': 'var b = require("./b");',
+            'b.js': 'export default 1;'
+          }
+        });
+
+        const directory = __dirname + '/onlyRealDeps';
+        const filename = directory + '/a.js';
+        const nonExistent = [];
+
+        const tree = dependencyTree({filename, directory, nonExistent});
+
+        assert.equal(nonExistent.length, 0);
+      });
+    });
+
+    describe('and the file contains a mix of invalid and valid partials', function() {
+      it('stores the invalid ones', function() {
+        mockfs({
+          [__dirname + '/onlyRealDeps']: {
+            'a.js': 'var b = require("./b");',
+            'b.js': 'var c = require("./c"); export default 1;',
+            'c.js': 'var crap = require("./notRealMan");'
+          }
+        });
+
+        const directory = __dirname + '/onlyRealDeps';
+        const filename = directory + '/a.js';
+        const nonExistent = [];
+
+        const tree = dependencyTree({filename, directory, nonExistent});
+
+        assert.equal(nonExistent.length, 1);
+        assert.equal(nonExistent[0], './notRealMan');
+      });
+    });
+
+    describe('and there is more than one reference to the invalid partial', function() {
+      it('only includes the non-existent partial once', function() {
+        mockfs({
+          [__dirname + '/onlyRealDeps']: {
+            'a.js': 'var b = require("./b");\nvar crap = require("./notRealMan");',
+            'b.js': 'var c = require("./c"); export default 1;',
+            'c.js': 'var crap = require("./notRealMan");'
+          }
+        });
+
+        const directory = __dirname + '/onlyRealDeps';
+        const filename = directory + '/a.js';
+        const nonExistent = [];
+
+        const tree = dependencyTree({filename, directory, nonExistent});
+
+        assert.equal(nonExistent.length, 1);
+        assert.equal(nonExistent[0], './notRealMan');
+      });
+    });
+  });
+
+  describe('throws', function() {
+    beforeEach(function() {
+      this._directory = __dirname + '/example/commonjs';
+      this._revert = dependencyTree.__set__('traverse', () => []);
+    });
+
+    afterEach(function() {
+      this._revert();
+    });
+
+    it('throws if the filename is missing', function() {
+      assert.throws(function() {
+        dependencyTree({
+          filename: undefined,
+          directory: this._directory
+        });
+      });
+    });
+
+    it('throws if the root is missing', function() {
+      assert.throws(function() {
+        dependencyTree({filename});
+      });
+    });
+
+    it('throws if a supplied filter is not a function', function() {
+      assert.throws(function() {
+        const directory = __dirname + '/example/onlyRealDeps';
+        const filename = directory + '/a.js';
+
+        const tree = dependencyTree({
+          filename,
+          directory,
+          filter: 'foobar'
+        });
+      });
+    });
+
+    it('does not throw on the legacy `root` option', function() {
+      assert.doesNotThrow(function() {
+        const directory = __dirname + '/example/onlyRealDeps';
+        const filename = directory + '/a.js';
+
+        const tree = dependencyTree({
+          filename,
+          root: directory
+        });
+      });
+    });
+  });
+
+  describe('on file error', function() {
+    beforeEach(function() {
+      this._directory = __dirname + '/example/commonjs';
+    });
+
+    it('does not throw', function() {
+      assert.doesNotThrow(() => {
+        dependencyTree({
+          filename: 'foo',
+          directory: this._directory
+        });
+      });
+    });
+
+    it('returns no dependencies', function() {
+      const tree = dependencyTree({filename: 'foo', directory: this._directory});
+      assert(!tree.length);
+    });
+  });
+
+  describe('when a filter function is supplied', function() {
+    it('uses the filter to determine if a file should be included in the results', function() {
+      const directory = __dirname + '/example/onlyRealDeps';
+      const filename = directory + '/a.js';
+
+      const tree = dependencyTree({
+        filename,
+        directory,
+        // Skip all 3rd party deps
+        filter: (filePath, moduleFile) => {
+          assert.ok(require.resolve('debug'));
+          assert.ok(moduleFile.match('test/example/onlyRealDeps/a.js'));
+          return filePath.indexOf('node_modules') === -1;
+        }
+      });
+
+      const subTree = tree[filename];
+      assert.ok(Object.keys(tree).length);
+
+      const has3rdPartyDep = Object.keys(subTree).some(dep => dep === require.resolve('debug'));
+      assert.ok(!has3rdPartyDep);
+    });
+  });
+
+  describe('memoization (#2)', function() {
+    beforeEach(function() {
+      this._spy = sinon.spy(dependencyTree, '_getDependencies');
+    });
+
+    afterEach(function() {
+      dependencyTree._getDependencies.restore();
+    });
+
+    it('accepts a cache object for memoization (#2)', function() {
+      const filename = __dirname + '/example/amd/a.js';
+      const directory = __dirname + '/example/amd';
+      const cache = {};
+
+      cache[__dirname + '/example/amd/b.js'] = [
+        __dirname + '/example/amd/b.js',
+        __dirname + '/example/amd/c.js'
+      ];
+
+      const tree = dependencyTree({
+        filename,
+        directory,
+        visited: cache
+      });
+
+      assert.equal(Object.keys(tree[filename]).length, 2);
+      assert(this._spy.neverCalledWith(__dirname + '/example/amd/b.js'));
+    });
+
+    it('returns the precomputed list of a cached entry point', function() {
+      const filename = __dirname + '/example/amd/a.js';
+      const directory = __dirname + '/example/amd';
+
+      const cache = {
+        // Shouldn't process the first file's tree
+        [filename]: []
+      };
+
+      const tree = dependencyTree({
+        filename,
+        directory,
+        visited: cache
+      });
+
+      assert(!tree.length);
+    });
+  });
+
+  describe('module formats', function() {
+    describe('amd', function() {
+      testTreesForFormat('amd');
+    });
+
+    describe('commonjs', function() {
+      testTreesForFormat('commonjs');
+
+      describe('when given a CJS file with lazy requires', function() {
+        beforeEach(function() {
+          mockfs({
+            [__dirname + '/cjs']: {
+              'foo.js': 'module.exports = function(bar = require("./bar")) {};',
+              'bar.js': 'module.exports = 1;'
+            }
+          });
+        });
+
+        it('includes the lazy dependency', function() {
+          const directory = __dirname + '/cjs';
+          const filename = directory + '/foo.js';
+
+          const tree = dependencyTree({filename, directory});
+          const subTree = tree[filename];
+
+          assert.ok(`${directory}/bar.js` in subTree);
+        });
+      });
+
+      describe('when given a CJS file with module property in package.json', function() {
+        beforeEach(function() {
+          mockfs({
+            [__dirname + '/es6']: {
+              ['module.entry.js']: 'import * as module from "module.entry"',
+              ['node_modules']: {
+                ['module.entry']: {
+                  'index.main.js': 'module.exports = function() {};',
+                  'index.module.js': 'module.exports = function() {};',
+                  'package.json': '{ "main": "index.main.js", "module": "index.module.js" }'
+                }
+              }
+            }
+          });
+        });
+
+        it('it includes the module entry as dependency', function() {
+          const directory = __dirname + '/es6';
+          const filename = directory + '/module.entry.js';
+
+          const tree = dependencyTree({
+            filename,
+            directory,
+            nodeModulesConfig: {
+              entry: 'module'
+            }
+          });
+          const subTree = tree[filename];
+
+          assert.ok(`${directory}/node_modules/module.entry/index.module.js` in subTree);
+        });
+      });
+    });
+
+    describe('es6', function() {
+      beforeEach(function() {
+        this._directory = __dirname + '/example/es6';
+        mockes6();
+      });
+
+      testTreesForFormat('es6');
+
+      it('resolves files that have jsx', function() {
+        const filename = `${this._directory}/jsx.js`;
+        const {[filename]: tree} = dependencyTree({
+          filename,
+          directory: this._directory
+        });
+
+        assert.ok(tree[`${this._directory}/c.js`]);
+      });
+
+      it('resolves files with a jsx extension', function() {
+        const filename = `${this._directory}/foo.jsx`;
+        const {[filename]: tree} = dependencyTree({
+          filename,
+          directory: this._directory
+        });
+
+        assert.ok(tree[`${this._directory}/b.js`]);
+      });
+
+      it('resolves files that have es7', function() {
+        const filename = `${this._directory}/es7.js`;
+        const {[filename]: tree} = dependencyTree({
+          filename,
+          directory: this._directory
+        });
+
+        assert.ok(tree[`${this._directory}/c.js`]);
+      });
+
+      describe('when given an es6 file using CJS lazy requires', function() {
+        beforeEach(function() {
+          mockfs({
+            [__dirname + '/es6']: {
+              'foo.js': 'export default function(bar = require("./bar")) {};',
+              'bar.js': 'export default 1;'
+            }
+          });
+        });
+
+        describe('and mixedImport mode is turned on', function() {
+          it('includes the lazy dependency', function() {
+            const directory = __dirname + '/es6';
+            const filename = directory + '/foo.js';
+
+            const tree = dependencyTree({
+              filename,
+              directory,
+              detective: {
+                es6: {
+                  mixedImports: true
+                }
+              }
+            });
+
+            const subTree = tree[filename];
+
+            assert.ok(`${directory}/bar.js` in subTree);
+          });
+
+          it('also works for toList', function() {
+            const directory = __dirname + '/es6';
+            const filename = directory + '/foo.js';
+
+            const results = dependencyTree.toList({
+              filename,
+              directory,
+              detective: {
+                es6: {
+                  mixedImports: true
+                }
+              }
+            });
+
+            assert.equal(results[0], `${directory}/bar.js`);
+            assert.equal(results[1], filename);
+          });
+        });
+
+        describe('and mixedImport mode is turned off', function() {
+          it('does not include the lazy dependency', function() {
+            const directory = __dirname + '/es6';
+            const filename = directory + '/foo.js';
+
+            const tree = dependencyTree({
+              filename,
+              directory
+            });
+
+            const subTree = tree[filename];
+
+            assert.ok(!(`${directory}/bar.js` in subTree));
+          });
+        });
+      });
+
+      describe('when given an es6 file using dynamic imports', function() {
+        beforeEach(function() {
+          mockfs({
+            [__dirname + '/es6']: {
+              'foo.js': 'import("./bar");',
+              'bar.js': 'export default 1;'
+            }
+          });
+        });
+
+        it('includes the dynamic import', function() {
+          const directory = __dirname + '/es6';
+          const filename = directory + '/foo.js';
+
+          const tree = dependencyTree({
+            filename,
+            directory
+          });
+
+          const subTree = tree[filename];
+
+          assert.ok(!(`${directory}/bar.js` in subTree));
+        });
+      });
+    });
+
+    describe('sass', function() {
+      beforeEach(function() {
+        mockSass();
+      });
+
+      testTreesForFormat('sass', '.scss');
+    });
+
+    describe('stylus', function() {
+      beforeEach(function() {
+        mockStylus();
+      });
+
+      testTreesForFormat('stylus', '.styl');
+    });
+
+    describe('less', function() {
+      beforeEach(function() {
+        mockLess();
+      });
+
+      testTreesForFormat('less', '.less');
+    });
+
+    describe('typescript', function() {
+      testTreesForFormat('ts', '.ts');
+
+      it('utilizes a tsconfig', function() {
+        const directory = path.join(__dirname, 'example/ts');
+        const tsConfigPath = path.join(directory, '.tsconfig');
+
+        const results = dependencyTree.toList({
+          filename: `${__dirname}/example/ts/a.ts`,
+          directory,
+          tsConfig: tsConfigPath
+        });
+
+        assert.equal(results[0], path.join(directory, 'b.ts'));
+        assert.equal(results[1], path.join(directory, 'c.ts'));
+        assert.equal(results[2], path.join(directory, 'a.ts'));
+      });
+
+      it('supports tsx files', function() {
+        const directory = path.join(__dirname, 'example/ts');
+
+        const results = dependencyTree.toList({
+          filename: `${__dirname}/example/ts/d.tsx`,
+          directory
+        });
+
+        assert.equal(results[0], path.join(directory, 'c.ts'));
+      });
+    });
+  });
+
+  describe('toList', function() {
+    function testToList(format, ext = '.js') {
+      it('returns a post-order list form of the dependency tree', function() {
+        const directory = __dirname + '/example/' + format;
+        const filename = directory + '/a' + ext;
+
+        const list = dependencyTree.toList({
+          filename,
+          directory
+        });
+
+        assert(list instanceof Array);
+        assert(list.length);
+      });
+    }
+
+    it('returns an empty list on a non-existent filename', function() {
+      mockfs({
+        imaginary: {}
+      });
+
+      const directory = __dirname + '/imaginary';
+      const filename = directory + '/notafile.js';
+
+      const list = dependencyTree.toList({
+        filename,
+        directory
+      });
+
+      assert(list instanceof Array);
+      assert(!list.length);
+    });
+
+    it('orders the visited files by last visited', function() {
+      const directory = __dirname + '/example/amd';
+      const filename = directory + '/a.js';
+      const list = dependencyTree.toList({
+        filename,
+        directory
+      });
+
+      assert(list.length === 3);
+      assert(list[0] === directory + '/c.js');
+      assert(list[1] === directory + '/b.js');
+      assert(list[list.length - 1] === filename);
+    });
+
+    describe('module formats', function() {
+      describe('amd', function() {
+        testToList('amd');
+      });
+
+      describe('commonjs', function() {
+        testToList('commonjs');
+      });
+
+      describe('es6', function() {
+        beforeEach(function() {
+          mockes6();
+        });
+
+        testToList('es6');
+      });
+
+      describe('sass', function() {
+        beforeEach(function() {
+          mockSass();
+        });
+
+        testToList('sass', '.scss');
+      });
+
+      describe('stylus', function() {
+        beforeEach(function() {
+          mockStylus();
+        });
+
+        testToList('stylus', '.styl');
+      });
+
+      describe('less', function() {
+        beforeEach(function() {
+          mockLess();
+        });
+
+        testToList('less', '.less');
+      });
+
+      describe('typescript', function() {
+        testToList('ts', '.ts');
+      });
+    });
+  });
+
+  describe('webpack', function() {
+    beforeEach(function() {
+      // Note: not mocking because webpack's resolver needs a real project with dependencies;
+      // otherwise, we'd have to mock a ton of files.
+      this._root = path.join(__dirname, '../');
+      this._webpackConfig = this._root + '/webpack.config.js';
+
+      this._testResolution = name => {
+        const results = dependencyTree.toList({
+          filename: `${__dirname}/example/webpack/${name}.js`,
+          directory: this._root,
+          webpackConfig: this._webpackConfig,
+          filter: filename => filename.indexOf('filing-cabinet') !== -1
+        });
+
+        assert.ok(results.some(filename => filename.indexOf('node_modules/filing-cabinet') !== -1));
+      };
+    });
+
+    it('resolves aliased modules', function() {
+      this.timeout(5000);
+      this._testResolution('aliased');
+    });
+
+    it('resolves unaliased modules', function() {
+      this.timeout(5000);
+      this._testResolution('unaliased');
+    });
+  });
+
+  describe('requirejs', function() {
+    beforeEach(function() {
+      mockfs({
+        root: {
+          'lodizzle.js': 'define({})',
+          'require.config.js': `
+            requirejs.config({
+              baseUrl: './',
+              paths: {
+                F: './lodizzle.js'
+              }
+            });
+          `,
+          'a.js': `
+            define([
+              'F'
+            ], function(F) {
+
+            });
+          `,
+          'b.js': `
+            define([
+              './lodizzle'
+            ], function(F) {
+
+            });
+          `
+        }
+      });
+    });
+
+    it('resolves aliased modules', function() {
+      const tree = dependencyTree({
+        filename: 'root/a.js',
+        directory: 'root',
+        config: 'root/require.config.js'
+      });
+
+      const filename = path.resolve(process.cwd(), 'root/a.js');
+      const aliasedFile = path.resolve(process.cwd(), 'root/lodizzle.js');
+      assert.ok('root/lodizzle.js' in tree[filename]);
+    });
+
+    it('resolves non-aliased paths', function() {
+      const tree = dependencyTree({
+        filename: 'root/b.js',
+        directory: 'root',
+        config: 'root/require.config.js'
+      });
+
+      const filename = path.resolve(process.cwd(), 'root/b.js');
+      const aliasedFile = path.resolve(process.cwd(), 'root/lodizzle.js');
+      assert.ok('root/lodizzle.js' in tree[filename]);
+    });
+  });
+
+  describe('Config', function() {
+    describe('when cloning', function() {
+      describe('and a detective config was set', function() {
+        it('retains the detective config in the clone', function() {
+          const detectiveConfig = {
+            es6: {
+              mixedImports: true
+            }
+          };
+
+          const config = new Config({
+            detectiveConfig,
+            filename: 'foo',
+            directory: 'bar'
+          });
+
+          const clone = config.clone();
+
+          assert.deepEqual(clone.detectiveConfig, detectiveConfig);
+        });
+      });
+    });
+  });
+});