test: ✅ cover latest implement

__tests__/NodeResolver.spec.ts

@@ -0,0 +1,193 @@
+// package
+import { join, relative } from 'path';
+import { promises } from 'fs';
+// internal
+import { NodeResolver } from '../src/NodeResolver';
+import { FileSystem } from '../src/interface/fs';
+import { Material } from '../src/interface/resolver';
+
+describe('Relative Module Resolver', () => {
+  const fs: FileSystem = {
+    stat(path) {
+      return promises.stat(path);
+    },
+    readFile(path) {
+      return promises.readFile(path);
+    },
+  };
+
+  it('should consider original extension as highest priority', async () => {
+    const m: Material = {
+      context: __dirname,
+      referencePath: './__fixture__/extension/assign.js',
+    };
+    const resolver = new NodeResolver({
+      fs,
+      modules: [],
+      mainFiles: [],
+      mainFields: [],
+      descriptionFiles: [],
+      extensions: ['.ts', '.mjs', '.js'],
+    });
+    const terminal = await resolver.resolve(m);
+    const readable = relative(__dirname, terminal.absPath);
+
+    expect(readable).toEqual('__fixture__/extension/assign.js');
+  });
+
+  it('should fullfil missing extension', async () => {
+    const m: Material = {
+      context: __dirname,
+      referencePath: './__fixture__/extension/assign',
+    };
+    const resolver1 = new NodeResolver({
+      fs,
+      modules: [],
+      mainFiles: [],
+      mainFields: [],
+      descriptionFiles: [],
+      extensions: ['.ts', '.mjs', '.js'],
+    });
+    const resolver2 = new NodeResolver({
+      fs,
+      modules: [],
+      mainFiles: [],
+      mainFields: [],
+      descriptionFiles: [],
+      extensions: ['.mjs', '.js', '.ts'],
+    });
+
+    const terminal1 = await resolver1.resolve(m);
+    const readable1 = relative(__dirname, terminal1.absPath);
+
+    expect(readable1).toEqual('__fixture__/extension/assign.ts');
+
+    const terminal2 = await resolver2.resolve(m);
+    const readable2 = relative(__dirname, terminal2.absPath);
+
+    expect(readable2).toEqual('__fixture__/extension/assign.mjs');
+  });
+
+  it('should fullfil directory indexes', async () => {
+    const m: Material = {
+      context: __dirname,
+      referencePath: './__fixture__/directory',
+    };
+    const resolver1 = new NodeResolver({
+      fs,
+      modules: [],
+      mainFields: [],
+      descriptionFiles: [],
+      extensions: ['.ts'],
+      mainFiles: ['index.wechat', 'index.alipay', 'index'],
+    });
+
+    const terminal1 = await resolver1.resolve(m);
+    const readable1 = relative(__dirname, terminal1.absPath);
+
+    expect(readable1).toEqual('__fixture__/directory/index.wechat.ts');
+
+    const resolver2 = new NodeResolver({
+      fs,
+      modules: [],
+      mainFields: [],
+      descriptionFiles: [],
+      extensions: ['.ts'],
+      mainFiles: ['index.alipay', 'index.wechat', 'index'],
+    });
+
+    const terminal2 = await resolver2.resolve(m);
+    const readable2 = relative(__dirname, terminal2.absPath);
+
+    expect(readable2).toEqual('__fixture__/directory/index.alipay.ts');
+  });
+
+  it('should support npm installed module by index', async () => {
+    const m: Material = {
+      context: __dirname,
+      referencePath: 'rxjs/operators',
+    };
+    const resolver = new NodeResolver({
+      fs,
+      modules: [join(__dirname, '../node_modules')],
+      mainFiles: ['index'],
+      mainFields: [],
+      descriptionFiles: [],
+      extensions: ['.js'],
+    });
+    const terminal = await resolver.resolve(m);
+    const readable = relative(__dirname, terminal.absPath);
+
+    expect(readable).toEqual('../node_modules/rxjs/operators/index.js');
+  });
+
+  it('should support npm installed module by package.json', async () => {
+    const m: Material = {
+      context: __dirname,
+      referencePath: 'rxjs',
+    };
+    const resolver1 = new NodeResolver({
+      fs,
+      modules: [join(__dirname, '../node_modules')],
+      mainFiles: [],
+      mainFields: ['main'],
+      descriptionFiles: ['package.json'],
+      extensions: ['.js'],
+    });
+    const resolver2 = new NodeResolver({
+      fs,
+      modules: [join(__dirname, '../node_modules')],
+      mainFiles: [],
+      mainFields: ['module', 'main'],
+      descriptionFiles: ['package.json'],
+      extensions: ['.js'],
+    });
+    const terminal1 = await resolver1.resolve(m);
+    const readable1 = relative(__dirname, terminal1.absPath);
+
+    expect(readable1).toEqual('../node_modules/rxjs/index.js');
+
+    const terminal2 = await resolver2.resolve(m);
+    const readable2 = relative(__dirname, terminal2.absPath);
+
+    expect(readable2).toEqual('../node_modules/rxjs/_esm5/index.js');
+  });
+
+  it('should support npm installed module by package.json', async () => {
+    const m: Material = {
+      context: __dirname,
+      referencePath: 'preact/hooks',
+    };
+    const resolver1 = new NodeResolver({
+      fs,
+      modules: [join(__dirname, '../node_modules')],
+      mainFiles: [],
+      mainFields: ['main'],
+      descriptionFiles: ['package.json'],
+      extensions: ['.js'],
+    });
+
+    const terminal1 = await resolver1.resolve(m);
+    const readable1 = relative(__dirname, terminal1.absPath);
+
+    expect(readable1).toEqual('../node_modules/preact/hooks/dist/hooks.js');
+  });
+
+  it('should reject when no match', () => {
+    const m: Material = {
+      context: __dirname,
+      referencePath: './unknown',
+    };
+    const resolver = new NodeResolver({
+      fs,
+      modules: [],
+      mainFiles: [],
+      mainFields: [],
+      descriptionFiles: [],
+      extensions: [],
+    });
+
+    // default empty error
+    expect(resolver.resolve(m)).rejects.toBeInstanceOf(Error);
+  });
+});

package.json

@@ -66,6 +66,7 @@
     "jest": "^24.1.0",
     "lint-staged": "^10.5.1",
     "npm-run-all": "^4.1.5",
+    "preact": "^10.5.7",
     "prettier": "^2.0.0",
     "typescript": "^4.0.2"
   },

yarn.lock

@@ -5173,6 +5173,11 @@ posix-character-classes@^0.1.0:
   resolved "https://registry.yarnpkg.com/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
   integrity sha1-AerA/jta9xoqbAL+q7jB/vfgDqs=
 
+preact@^10.5.7:
+  version "10.5.7"
+  resolved "https://registry.yarnpkg.com/preact/-/preact-10.5.7.tgz#f1d84725539e18f7ccbea937cf3db5895661dbd3"
+  integrity sha512-4oEpz75t/0UNcwmcsjk+BIcDdk68oao+7kxcpc1hQPNs2Oo3ZL9xFz8UBf350mxk/VEdD41L5b4l2dE3Ug3RYg==
+
 prelude-ls@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.2.1.tgz#debc6489d7a6e6b0e7611888cec880337d316396"