snippet reference

jest.config.ts

@@ -0,0 +1,203 @@
+/**
+ * For a detailed explanation regarding each configuration property, visit:
+ * https://jestjs.io/docs/configuration
+ */
+
+import type { Config } from 'jest';
+
+const config: Config = {
+  // All imported modules in your tests should be mocked automatically
+  // automock: false,
+
+  // Stop running tests after `n` failures
+  // bail: 0,
+
+  // The directory where Jest should store its cached dependency information
+  // cacheDirectory: "/private/var/folders/k0/1yjsmvw96q529jwsnf0whysm0000gn/T/jest_dx",
+
+  // Automatically clear mock calls, instances, contexts and results before every test
+  // clearMocks: false,
+
+  // Indicates whether the coverage information should be collected while executing the test
+  // collectCoverage: false,
+
+  // An array of glob patterns indicating a set of files for which coverage information should be collected
+  // collectCoverageFrom: undefined,
+
+  // The directory where Jest should output its coverage files
+  // coverageDirectory: undefined,
+
+  // An array of regexp pattern strings used to skip coverage collection
+  // coveragePathIgnorePatterns: [
+  //   "/node_modules/"
+  // ],
+
+  // Indicates which provider should be used to instrument code for coverage
+  coverageProvider: 'babel',
+
+  // A list of reporter names that Jest uses when writing coverage reports
+  // coverageReporters: [
+  //   "json",
+  //   "text",
+  //   "lcov",
+  //   "clover"
+  // ],
+
+  // An object that configures minimum threshold enforcement for coverage results
+  // coverageThreshold: undefined,
+
+  // A path to a custom dependency extractor
+  // dependencyExtractor: undefined,
+
+  // Make calling deprecated APIs throw helpful error messages
+  // errorOnDeprecated: false,
+
+  // The default configuration for fake timers
+  // fakeTimers: {
+  //   "enableGlobally": false
+  // },
+
+  // Force coverage collection from ignored files using an array of glob patterns
+  // forceCoverageMatch: [],
+
+  // A path to a module which exports an async function that is triggered once before all test suites
+  // globalSetup: undefined,
+
+  // A path to a module which exports an async function that is triggered once after all test suites
+  // globalTeardown: undefined,
+
+  // A set of global variables that need to be available in all test environments
+  // globals: {},
+
+  // The maximum amount of workers used to run your tests. Can be specified as % or a number. E.g. maxWorkers: 10% will use 10% of your CPU amount + 1 as the maximum worker number. maxWorkers: 2 will use a maximum of 2 workers.
+  // maxWorkers: "50%",
+
+  // An array of directory names to be searched recursively up from the requiring module's location
+  // moduleDirectories: [
+  //   "node_modules"
+  // ],
+
+  // An array of file extensions your modules use
+  moduleFileExtensions: [
+    'js',
+    'mjs',
+    'cjs',
+    'jsx',
+    'ts',
+    'tsx',
+    'json',
+    'node',
+  ],
+
+  // A map from regular expressions to module names or to arrays of module names that allow to stub out resources with a single module
+  // moduleNameMapper: {},
+
+  // An array of regexp pattern strings, matched against all module paths before considered 'visible' to the module loader
+  // modulePathIgnorePatterns: [],
+
+  // Activates notifications for test results
+  // notify: false,
+
+  // An enum that specifies notification mode. Requires { notify: true }
+  // notifyMode: "failure-change",
+
+  // A preset that is used as a base for Jest's configuration
+  // preset: undefined,
+
+  // Run tests from one or more projects
+  // projects: undefined,
+
+  // Use this configuration option to add custom reporters to Jest
+  // reporters: undefined,
+
+  // Automatically reset mock state before every test
+  // resetMocks: false,
+
+  // Reset the module registry before running each individual test
+  // resetModules: false,
+
+  // A path to a custom resolver
+  // resolver: undefined,
+
+  // Automatically restore mock state and implementation before every test
+  // restoreMocks: false,
+
+  // The root directory that Jest should scan for tests and modules within
+  // rootDir: undefined,
+
+  // A list of paths to directories that Jest should use to search for files in
+  // roots: [
+  //   "<rootDir>"
+  // ],
+
+  // Allows you to use a custom runner instead of Jest's default test runner
+  // runner: "jest-runner",
+
+  // The paths to modules that run some code to configure or set up the testing environment before each test
+  // setupFiles: ['jest-fetch-mock'],
+
+  // A list of paths to modules that run some code to configure or set up the testing framework before each test
+  setupFilesAfterEnv: [],
+
+  // The number of seconds after which a test is considered as slow and reported as such in the results.
+  // slowTestThreshold: 5,
+
+  // A list of paths to snapshot serializer modules Jest should use for snapshot testing
+  // snapshotSerializers: [],
+
+  // The test environment that will be used for testing
+  testEnvironment: 'node',
+
+  // Options that will be passed to the testEnvironment
+  // testEnvironmentOptions: {},
+
+  // Adds a location field to test results
+  // testLocationInResults: false,
+
+  // The glob patterns Jest uses to detect test files
+  // testMatch: [
+  //   "**/__tests__/**/*.[jt]s?(x)",
+  //   "**/?(*.)+(spec|test).[tj]s?(x)"
+  // ],
+
+  // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
+  // testPathIgnorePatterns: [
+  //   "/node_modules/"
+  // ],
+
+  // The regexp pattern or array of patterns that Jest uses to detect test files
+  // testRegex: [],
+
+  // This option allows the use of a custom results processor
+  // testResultsProcessor: undefined,
+
+  // This option allows use of a custom test runner
+  // testRunner: "jest-circus/runner",
+
+  // A map from regular expressions to paths to transformers
+
+  transform: {
+    // '\\.[jt]sx?$': ['babel-jest', { configFile: './babel.config.js' }],
+    '^.+.[jt]sx?$': ['ts-jest', { isolatedModules: true }],
+  },
+
+  // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
+
+  transformIgnorePatterns: [
+    '/node_modules/(?!(unist-util-visit|unist-util-is|unist-util-select|unist-util-parents|unist-util-visit-parents|unist-util-position|unist-util-remove-position|unist-util-generated)/)',
+  ],
+
+  // An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them
+  // unmockedModulePathPatterns: undefined,
+
+  // Indicates whether each individual test should be reported during the run
+  // verbose: undefined,
+
+  // An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
+  // watchPathIgnorePatterns: [],
+
+  // Whether to use watchman for file crawling
+  // watchman: true,
+};
+
+export default config;

package.json

@@ -15,6 +15,7 @@
     "remark": "remark",
     "remark:once": "npm run remark -- --quiet --frail --use remark-validate-links docs/",
     "remark:watch": "npm run remark -- --quiet --frail --use remark-validate-links --watch docs/",
+    "test": "jest",
     "typecheck": "tsc"
   },
   "dependencies": {
@@ -58,7 +59,9 @@
   },
   "devDependencies": {
     "@docusaurus/module-type-aliases": "^3.5.2",
+    "@jest/globals": "^29.7.0",
     "@tsconfig/docusaurus": "^2.0.3",
+    "@types/jest": "^29.5.14",
     "@typescript-eslint/eslint-plugin": "^8.11.0",
     "concurrently": "^8.2.1",
     "eslint": "^8.0.1",
@@ -67,10 +70,13 @@
     "eslint-plugin-n": "^15.0.0",
     "eslint-plugin-promise": "^6.0.0",
     "eslint-plugin-react": "7.32.2",
+    "jest": "^29.7.0",
     "node-jq": "6.0.1",
     "remark-cli": "^12.0.0",
     "remark-validate-links": "^12.1.1",
-    "typescript": "*"
+    "ts-jest": "^29.2.5",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.7.2"
   },
   "browserslist": {
     "production": [

src/plugins/code-reference.js

@@ -11,17 +11,100 @@ const getUrl = (nodeValue) => {
   return url.replace(githubReplace, '$1raw.githubusercontent.com/$3/$4');
 };
 
-const getLines = (url) => {
+/**
+ * try parse int
+ * @param {string} strNumber
+ * @returns number | null
+ */
+const tryParseInt = (strNumber) => {
+  try {
+    const number = parseInt(strNumber);
+    if (isNaN(number)) {
+      return null;
+    }
+    return number;
+  } catch (e) {
+    console.error(e);
+    return null;
+  }
+};
+
+/**
+ * get start line and end line for a snippet from a url
+ * @param {string} url provided url
+ * @returns {null | [string, string]}
+ */
+export const getLines = (url) => {
   const lines = url.split('#')[1];
-  if (!lines) {
+  if (lines == null || lines === '') {
+    return null;
+  }
+  if (lines.match(/^L\d+$/) == null && lines.match(/^L\d+-L\d+$/) == null) {
     return null;
   }
 
   const [start, end] = lines
     .split('-')
     .map((line) => line.replace(/L(\d+)/, '$1'));
 
-  return [start, end];
+  const startNum = tryParseInt(start);
+  const endNum = tryParseInt(end);
+
+  return [startNum, endNum ?? startNum];
+};
+
+export const getSnippetName = (url) => {
+  const snippet = url.split('#')[1];
+  if (snippet == null || snippet === '') {
+    return null;
+  }
+  if (snippet.match(/^L\d+$/) != null || snippet.match(/^L\d+-L\d+$/) != null) {
+    return null;
+  }
+  return snippet;
+};
+
+export const getCodeSnippet = ({ code, lines, snippetName }) => {
+  if (lines != null) {
+    const codeLines = code
+      .split('\n')
+      .slice(lines[0] - 1, lines[1])
+      .join('\n');
+    return codeLines;
+  }
+  /**
+   * based on https://github.com/search?q=%22%5BSTART+snippet_name%5D%22&type=code
+   */
+  if (snippetName != null) {
+    /** @type [string] */
+    const codeArray = code.split('\n');
+    const snippetStart = `[START ${snippetName}]`;
+    const snippetEnd = `[END ${snippetName}]`;
+    let startLine = null;
+    let endLine = null;
+
+    for (let i = 0; i < codeArray.length; i++) {
+      const line = codeArray[i];
+      if (line.includes(snippetStart)) {
+        startLine = i + 1;
+        break;
+      }
+    }
+    for (let i = 0; i < codeArray.length; i++) {
+      const line = codeArray[i];
+
+      if (line.includes(snippetEnd)) {
+        endLine = i;
+        break;
+      }
+    }
+    if (startLine != null && endLine != null) {
+      const codeLines = codeArray.slice(startLine, endLine).join('\n');
+      return codeLines;
+    }
+    return code;
+  }
+  return code;
 };
 
 const plugin = () => {
@@ -37,24 +120,16 @@ const plugin = () => {
         const lines = getLines(url);
 
         const fetchPromise = fetch(url)
-          .then((res) => {
+          .then(async (res) => {
             if (!res.ok) {
               throw new Error(
                 `Failed to fetch code from ${url}: ${res.statusText}`,
               );
             }
-            return res.text();
+            return await res.text();
           })
           .then((code) => {
-            if (lines) {
-              const codeLines = code
-                .split('\n')
-                .slice(lines[0] - 1, lines[1])
-                .join('\n');
-              node.value = codeLines;
-            } else {
-              node.value = code;
-            }
+            node.value = getCodeSnippet({ code, lines, snippetName });
           })
           .catch((err) => {
             console.error(err);