From e82374ae2bac0443112ff365a5017b49ccc5cae5 Mon Sep 17 00:00:00 2001
From: Ben Heidemann <ben@heidemann.co.uk>
Date: Sat, 10 Apr 2021 12:16:38 +0100
Subject: [PATCH] test: add spec for webpack plugin

---
 tests/index.js                                |   3 +
 .../webpack-plugin/webpack-plugin.spec.js     | 530 ++++++++++++++++++
 2 files changed, 533 insertions(+)
 create mode 100644 tests/spec/webpack-plugin/webpack-plugin.spec.js

diff --git a/tests/index.js b/tests/index.js
index ae109ef..75f797e 100644
--- a/tests/index.js
+++ b/tests/index.js
@@ -7,6 +7,9 @@
 require('./spec/shims/fs.spec');
 require('./spec/shims/path.spec');
 
+// Webpack Plugin
+require('./spec/webpack-plugin/webpack-plugin.spec');
+
 // Filer
 require('./spec/filer.spec');
 require('./spec/filer.buffer.spec.js');
diff --git a/tests/spec/webpack-plugin/webpack-plugin.spec.js b/tests/spec/webpack-plugin/webpack-plugin.spec.js
new file mode 100644
index 0000000..ac0eefd
--- /dev/null
+++ b/tests/spec/webpack-plugin/webpack-plugin.spec.js
@@ -0,0 +1,530 @@
+'use strict';
+const expect = require('chai').expect;
+const utils = require('../../lib/test-utils');
+const FilerWebpackPlugin = require('../../../src/webpack-plugin/plugin');
+
+function createNMFResolveCompilerObject(resolveData) {
+
+  const normalModuleFactory_resolve_tap = utils.createMockFn(function (name, callback) {
+    callback(resolveData);
+  });
+
+  const normalModuleFactory = {
+    hooks: {
+      resolve: {
+        tap: normalModuleFactory_resolve_tap
+      }
+    }
+  }
+
+  const normalModuleFactory_tap = utils.createMockFn(function (name, callback) {
+    callback(normalModuleFactory);
+  });
+
+  const compiler = {
+    hooks: {
+      normalModuleFactory: {
+        tap: normalModuleFactory_tap,
+      }
+    }
+  }
+
+  return {
+    compiler,
+    normalModuleFactory_tap,
+    normalModuleFactory_resolve_tap,
+  }
+}
+
+describe.only('path shim', () => {
+  it('should instantiate the plugin with valid options', () => {
+    // Arrange
+    const options = {
+      filerDir: '/filer',
+      shimsDir: '/shims',
+      fsProviderDir: '/fsProvider',
+      shimFs: false,
+      shimPath: false,
+      fsProvider: 'custom',
+    };
+
+    // Act
+    const plugin = new FilerWebpackPlugin(options);
+
+    // Assert
+    expect(plugin.options).to.not.be.undefined;
+
+    expect(plugin.options.filerDir).to.equal(options.filerDir);
+    expect(plugin.options.shimsDir).to.equal(options.shimsDir);
+    expect(plugin.options.fsProviderDir).to.equal(options.fsProviderDir);
+    expect(plugin.options.shimFs).to.equal(options.shimFs);
+    expect(plugin.options.shimPath).to.equal(options.shimPath);
+    expect(plugin.options.fsProvider).to.equal(options.fsProvider);
+  });
+
+  it('should instantiate the plugin with default options', () => {
+    // Act
+    const plugin = new FilerWebpackPlugin();
+
+    // Assert
+    expect(plugin.options).to.not.be.undefined;
+
+    expect(plugin.options.filerDir).to.equal('/node_modules/filer');
+    expect(plugin.options.shimsDir).to.equal('/node_modules/filer/shims');
+    expect(plugin.options.fsProviderDir).to.equal('/node_modules/filer/shims/providers');
+    expect(plugin.options.shimFs).to.equal(true);
+    expect(plugin.options.shimPath).to.equal(true);
+    expect(plugin.options.fsProvider).to.equal('default');
+  });
+
+  it('should instantiate the plugin with invalid options', () => {
+    // Arrange
+    const options = {
+      filerDir: 123,
+      shimsDir: 456,
+      fsProviderDir: 789,
+      shimFs: 'false',
+      shimPath: 'false',
+      fsProvider: false,
+    };
+
+    // Act // Assert
+    expect(() => {
+      new FilerWebpackPlugin(options);
+    }).to.throw();
+  });
+
+  it('should instantiate the plugin with options and the <rootDir> tag should be replaced', () => {
+    // Arrange
+    const options = {
+      filerDir: '<rootDir>/filer',
+      shimsDir: '<rootDir>/shims',
+      fsProviderDir: '<rootDir>/fsProvider',
+    };
+
+    // Act
+    const plugin = new FilerWebpackPlugin(options);
+
+    // Assert
+    expect(plugin.options).to.not.be.undefined;
+
+    expect(plugin.options.filerDir).to.equal(options.filerDir.replace('<rootDir>', ''));
+    expect(plugin.options.shimsDir).to.equal(options.shimsDir.replace('<rootDir>', ''));
+    expect(plugin.options.fsProviderDir).to.equal(options.fsProviderDir.replace('<rootDir>', ''));
+  });
+
+  describe('should instantiate the plugin with valid options and invoke the apply method', () => {
+    it('should ignore an unrelated module', () => {
+      // Arrange
+      const options = {
+        filerDir: '/filer',
+        shimsDir: '/shims',
+        fsProviderDir: '/fsProvider',
+        shimFs: false,
+        shimPath: false,
+        fsProvider: 'custom',
+      };
+
+      const resolveData = {
+        request: 'aModuleWeDontCareAbout',
+        context: '/some/random/directory',
+      };
+      const resolveDataIn = Object.create(resolveData);
+
+      // Mocks
+      const {
+        compiler,
+        normalModuleFactory_tap,
+        normalModuleFactory_resolve_tap,
+      } = createNMFResolveCompilerObject(resolveDataIn);
+
+      // Act
+      const plugin = new FilerWebpackPlugin(options);
+      plugin.apply(compiler);
+
+      // Assert
+      expect(normalModuleFactory_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(normalModuleFactory_resolve_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_resolve_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(resolveDataIn.request).to.equal(resolveData.request);
+    });
+
+    it('should resolve fsProvider to <fsProviderDir>/default.js when fsProvider options is default', () => {
+      // Arrange
+      const options = {
+        filerDir: '/filer',
+        shimsDir: '/shims',
+        fsProviderDir: '/fsProvider',
+        shimFs: false,
+        shimPath: false,
+        fsProvider: 'default',
+      };
+
+      const resolveData = {
+        request: 'fsProvider',
+        context: options.shimsDir,
+      };
+      const resolveDataIn = Object.create(resolveData);
+
+      // Mocks
+      const {
+        compiler,
+        normalModuleFactory_tap,
+        normalModuleFactory_resolve_tap,
+      } = createNMFResolveCompilerObject(resolveDataIn);
+
+      // Act
+      const plugin = new FilerWebpackPlugin(options);
+      plugin.apply(compiler);
+
+      // Assert
+      expect(normalModuleFactory_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(normalModuleFactory_resolve_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_resolve_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(resolveDataIn.request).to.equal(`${options.fsProviderDir}/default.js`);
+    });
+
+    it('should resolve fsProvider to <fsProviderDir>/indexeddb.js when fsProvider options is indexeddb', () => {
+      // Arrange
+      const options = {
+        filerDir: '/filer',
+        shimsDir: '/shims',
+        fsProviderDir: '/fsProvider',
+        shimFs: false,
+        shimPath: false,
+        fsProvider: 'indexeddb',
+      };
+
+      const resolveData = {
+        request: 'fsProvider',
+        context: options.shimsDir,
+      };
+      const resolveDataIn = Object.create(resolveData);
+
+      // Mocks
+      const {
+        compiler,
+        normalModuleFactory_tap,
+        normalModuleFactory_resolve_tap,
+      } = createNMFResolveCompilerObject(resolveDataIn);
+
+      // Act
+      const plugin = new FilerWebpackPlugin(options);
+      plugin.apply(compiler);
+
+      // Assert
+      expect(normalModuleFactory_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(normalModuleFactory_resolve_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_resolve_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(resolveDataIn.request).to.equal(`${options.fsProviderDir}/indexeddb.js`);
+    });
+
+    it('should resolve fsProvider to <fsProviderDir>/memory.js when fsProvider options is memory', () => {
+      // Arrange
+      const options = {
+        filerDir: '/filer',
+        shimsDir: '/shims',
+        fsProviderDir: '/fsProvider',
+        shimFs: false,
+        shimPath: false,
+        fsProvider: 'memory',
+      };
+
+      const resolveData = {
+        request: 'fsProvider',
+        context: options.shimsDir,
+      };
+      const resolveDataIn = Object.create(resolveData);
+
+      // Mocks
+      const {
+        compiler,
+        normalModuleFactory_tap,
+        normalModuleFactory_resolve_tap,
+      } = createNMFResolveCompilerObject(resolveDataIn);
+
+      // Act
+      const plugin = new FilerWebpackPlugin(options);
+      plugin.apply(compiler);
+
+      // Assert
+      expect(normalModuleFactory_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(normalModuleFactory_resolve_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_resolve_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(resolveDataIn.request).to.equal(`${options.fsProviderDir}/memory.js`);
+    });
+
+    it('should resolve fsProvider to <fsProviderDir>/custom.js when fsProvider options is custom', () => {
+      // Arrange
+      const options = {
+        filerDir: '/filer',
+        shimsDir: '/shims',
+        fsProviderDir: '/fsProvider',
+        shimFs: false,
+        shimPath: false,
+        fsProvider: 'custom',
+      };
+
+      const resolveData = {
+        request: 'fsProvider',
+        context: options.shimsDir,
+      };
+      const resolveDataIn = Object.create(resolveData);
+
+      // Mocks
+      const {
+        compiler,
+        normalModuleFactory_tap,
+        normalModuleFactory_resolve_tap,
+      } = createNMFResolveCompilerObject(resolveDataIn);
+
+      // Act
+      const plugin = new FilerWebpackPlugin(options);
+      plugin.apply(compiler);
+
+      // Assert
+      expect(normalModuleFactory_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(normalModuleFactory_resolve_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_resolve_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(resolveDataIn.request).to.equal(`${options.fsProviderDir}/custom.js`);
+    });
+
+    it('should throw an error when an invalid options is provided for fsProvider', () => {
+      // Arrange
+      const options = {
+        filerDir: '/filer',
+        shimsDir: '/shims',
+        fsProviderDir: '/fsProvider',
+        shimFs: false,
+        shimPath: false,
+        fsProvider: 'invalid_fs_provider_option',
+      };
+
+      const resolveData = {
+        request: 'fsProvider',
+        context: options.shimsDir,
+      };
+      const resolveDataIn = Object.create(resolveData);
+
+      // Mocks
+      const {
+        compiler,
+        normalModuleFactory_tap,
+        normalModuleFactory_resolve_tap,
+      } = createNMFResolveCompilerObject(resolveDataIn);
+
+      // Act
+      const plugin = new FilerWebpackPlugin(options);
+
+      // Act // Assert
+      expect(() => {
+        plugin.apply(compiler);
+      }).to.throw();
+    });
+
+    it('should ignore a request for fs when the context is in the filer directory', () => {
+      // Arrange
+      const options = {
+        filerDir: '/filer',
+        shimsDir: '/shims',
+        fsProviderDir: '/fsProvider',
+        shimFs: false,
+        shimPath: false,
+        fsProvider: 'custom',
+      };
+
+      const resolveData = {
+        request: 'fs',
+        context: options.filerDir + '/src',
+      };
+      const resolveDataIn = Object.create(resolveData);
+
+      // Mocks
+      const {
+        compiler,
+        normalModuleFactory_tap,
+        normalModuleFactory_resolve_tap,
+      } = createNMFResolveCompilerObject(resolveDataIn);
+
+      // Act
+      const plugin = new FilerWebpackPlugin(options);
+      plugin.apply(compiler);
+
+      // Assert
+      expect(normalModuleFactory_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(normalModuleFactory_resolve_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_resolve_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(resolveDataIn.request).to.equal(resolveData.request);
+    });
+
+    it('should resolve a request for fs to the fs shim when the context is not in the filer directory', () => {
+      // Arrange
+      const options = {
+        filerDir: '/filer',
+        shimsDir: '/shims',
+        fsProviderDir: '/fsProvider',
+        shimFs: true,
+        shimPath: true,
+        fsProvider: 'custom',
+      };
+
+      const resolveData = {
+        request: 'fs',
+        context: '/some/random/directory',
+      };
+      const resolveDataIn = Object.create(resolveData);
+
+      // Mocks
+      const {
+        compiler,
+        normalModuleFactory_tap,
+        normalModuleFactory_resolve_tap,
+      } = createNMFResolveCompilerObject(resolveDataIn);
+
+      // Act
+      const plugin = new FilerWebpackPlugin(options);
+      plugin.apply(compiler);
+
+      // Assert
+      expect(normalModuleFactory_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(normalModuleFactory_resolve_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_resolve_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(resolveDataIn.request).to.equal(`${options.shimsDir}/fs.js`);
+    });
+
+    it('should not resolve a request for fs to the fs shim when the context is not in the filer directory but shimFs is false', () => {
+      // Arrange
+      const options = {
+        filerDir: '/filer',
+        shimsDir: '/shims',
+        fsProviderDir: '/fsProvider',
+        shimFs: false,
+        shimPath: false,
+        fsProvider: 'custom',
+      };
+
+      const resolveData = {
+        request: 'fs',
+        context: '/some/random/directory',
+      };
+      const resolveDataIn = Object.create(resolveData);
+
+      // Mocks
+      const {
+        compiler,
+        normalModuleFactory_tap,
+        normalModuleFactory_resolve_tap,
+      } = createNMFResolveCompilerObject(resolveDataIn);
+
+      // Act
+      const plugin = new FilerWebpackPlugin(options);
+      plugin.apply(compiler);
+
+      // Assert
+      expect(normalModuleFactory_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(normalModuleFactory_resolve_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_resolve_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(resolveDataIn.request).to.equal(resolveData.request);
+    });
+
+    it('should resolve a request for path to the path shim when the context is not in the filer directory', () => {
+      // Arrange
+      const options = {
+        filerDir: '/filer',
+        shimsDir: '/shims',
+        fsProviderDir: '/fsProvider',
+        shimFs: true,
+        shimPath: true,
+        fsProvider: 'custom',
+      };
+
+      const resolveData = {
+        request: 'path',
+        context: '/some/random/directory',
+      };
+      const resolveDataIn = Object.create(resolveData);
+
+      // Mocks
+      const {
+        compiler,
+        normalModuleFactory_tap,
+        normalModuleFactory_resolve_tap,
+      } = createNMFResolveCompilerObject(resolveDataIn);
+
+      // Act
+      const plugin = new FilerWebpackPlugin(options);
+      plugin.apply(compiler);
+
+      // Assert
+      expect(normalModuleFactory_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(normalModuleFactory_resolve_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_resolve_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(resolveDataIn.request).to.equal(`${options.shimsDir}/path.js`);
+    });
+
+    it('should not resolve a request for path to the path shim when the context is not in the filer directory but shimPath is false', () => {
+      // Arrange
+      const options = {
+        filerDir: '/filer',
+        shimsDir: '/shims',
+        fsProviderDir: '/fsProvider',
+        shimFs: false,
+        shimPath: false,
+        fsProvider: 'custom',
+      };
+
+      const resolveData = {
+        request: 'path',
+        context: '/some/random/directory',
+      };
+      const resolveDataIn = Object.create(resolveData);
+
+      // Mocks
+      const {
+        compiler,
+        normalModuleFactory_tap,
+        normalModuleFactory_resolve_tap,
+      } = createNMFResolveCompilerObject(resolveDataIn);
+
+      // Act
+      const plugin = new FilerWebpackPlugin(options);
+      plugin.apply(compiler);
+
+      // Assert
+      expect(normalModuleFactory_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(normalModuleFactory_resolve_tap.calls).to.have.length(1);
+      expect(normalModuleFactory_resolve_tap.calls[0].args[0]).to.equal('filer-webpack-plugin');
+
+      expect(resolveDataIn.request).to.equal(resolveData.request);
+    });
+  });
+});