How to use jest-runtime - 10 common examples

inner =>
        function() {
            if (isIntroscopedModule(arguments[1])) {
                // content
                arguments[0] =
                    arguments[0] + '\n\n// @introscope "enable": true';
            }
            // filename
            arguments[1] = removeQuery(arguments[1]);

            return inner.apply(this, arguments);
        },
);

wrap(
    Runtime.prototype,
    'requireModule',
    inner =>
        function(from, moduleName) {
            if (isIntroscopedModule(moduleName)) {
                let modulePath = this._resolveModule(from, moduleName);
                const realPath = removeQuery(modulePath);

                // makes module resolver find the proper transformer
                const ext = extname(realPath);
                moduleName += ext;
                modulePath += ext;
                arguments[1] = moduleName;

                this._cacheFS[modulePath] = fs.readFileSync(realPath, 'utf8');
            }
            return inner.apply(this, arguments);

const getResolver = (config, rawModuleMap) => {
  // In watch mode, the raw module map with all haste modules is passed from
  // the test runner to the watch command. This is because jest-haste-map's
  // watch mode does not persist the haste map on disk after every file change.
  // To make this fast and consistent, we pass it from the TestRunner.
  if (rawModuleMap) {
    return wrapResolver(
      Runtime.createResolver(config, new HasteMap.ModuleMap(rawModuleMap)),
    );
  } else {
    const name = config.name;
    if (!resolvers[name]) {
      resolvers[name] = wrapResolver(
        Runtime.createResolver(
          config,
          Runtime.createHasteMap(config).readModuleMap(),
        ),
      );
    }
    return resolvers[name];
  }
};

const runnerGlobal = environment.global
  const context = dangerfileContext

  // Adds things like fail, warn ... to global
  for (const prop in context) {
    if (context.hasOwnProperty(prop)) {
      const anyContext: any = context
      runnerGlobal[prop] = anyContext[prop]
    }
  }

  // Setup a runtime environment
  const hasteConfig = { automock: false, maxWorkers: 1, resetCache: false }
  const hasteMap = await Runtime.createHasteMap(config, hasteConfig).build()
  const resolver = Runtime.createResolver(config, hasteMap.moduleMap)
  const runtime = new Runtime(config, environment, resolver)

  return {
    context,
    environment,
    runtime
  }
}

// In watch mode, the raw module map with all haste modules is passed from
  // the test runner to the watch command. This is because jest-haste-map's
  // watch mode does not persist the haste map on disk after every file change.
  // To make this fast and consistent, we pass it from the TestRunner.
  if (serializableModuleMap) {
    const moduleMap = serializableModuleMap
      ? HasteMap.ModuleMap.fromJSON(serializableModuleMap)
      : null;
    return wrapResolver(
      Runtime.createResolver(config, new HasteMap.ModuleMap(moduleMap)),
    );
  } else {
    const name = config.name;
    if (!resolvers[name]) {
      resolvers[name] = wrapResolver(
        Runtime.createResolver(
          config,
          Runtime.createHasteMap(config).readModuleMap(),
        ),
      );
    }
    return resolvers[name];
  }
};

const getResolver = (config, rawModuleMap) => {
  // In watch mode, the raw module map with all haste modules is passed from
  // the test runner to the watch command. This is because jest-haste-map's
  // watch mode does not persist the haste map on disk after every file change.
  // To make this fast and consistent, we pass it from the TestRunner.
  if (rawModuleMap) {
    return wrapResolver(
      Runtime.createResolver(config, new HasteMap.ModuleMap(rawModuleMap)),
    );
  } else {
    const name = config.name;
    if (!resolvers[name]) {
      resolvers[name] = wrapResolver(
        Runtime.createResolver(
          config,
          Runtime.createHasteMap(config).readModuleMap(),
        ),
      );
    }
    return resolvers[name];
  }
};

export const getResolver = (
  config: ProjectConfig,
  serializableModuleMap: Object,
) => {
  // In watch mode, the raw module map with all haste modules is passed from
  // the test runner to the watch command. This is because jest-haste-map's
  // watch mode does not persist the haste map on disk after every file change.
  // To make this fast and consistent, we pass it from the TestRunner.
  if (serializableModuleMap) {
    const moduleMap = serializableModuleMap
      ? HasteMap.ModuleMap.fromJSON(serializableModuleMap)
      : null;
    return wrapResolver(
      Runtime.createResolver(config, new HasteMap.ModuleMap(moduleMap)),
    );
  } else {
    const name = config.name;
    if (!resolvers[name]) {
      resolvers[name] = wrapResolver(
        Runtime.createResolver(
          config,
          Runtime.createHasteMap(config).readModuleMap(),
        ),
      );
    }
    return resolvers[name];
  }
};

// watch mode does not persist the haste map on disk after every file change.
  // To make this fast and consistent, we pass it from the TestRunner.
  if (serializableModuleMap) {
    const moduleMap = serializableModuleMap
      ? HasteMap.ModuleMap.fromJSON(serializableModuleMap)
      : null;
    return wrapResolver(
      Runtime.createResolver(config, new HasteMap.ModuleMap(moduleMap)),
    );
  } else {
    const name = config.name;
    if (!resolvers[name]) {
      resolvers[name] = wrapResolver(
        Runtime.createResolver(
          config,
          Runtime.createHasteMap(config).readModuleMap(),
        ),
      );
    }
    return resolvers[name];
  }
};

const getResolver = (config, rawModuleMap) => {
  // In watch mode, the raw module map with all haste modules is passed from
  // the test runner to the watch command. This is because jest-haste-map's
  // watch mode does not persist the haste map on disk after every file change.
  // To make this fast and consistent, we pass it from the TestRunner.
  if (rawModuleMap) {
    return wrapResolver(
      Runtime.createResolver(config, new HasteMap.ModuleMap(rawModuleMap)),
    );
  } else {
    const name = config.name;
    if (!resolvers[name]) {
      resolvers[name] = wrapResolver(
        Runtime.createResolver(
          config,
          Runtime.createHasteMap(config).readModuleMap(),
        ),
      );
    }
    return resolvers[name];
  }
};

const environment: Environment = new NodeEnvironment(config)

  const runnerGlobal = environment.global
  const context = dangerfileContext

  // Adds things like fail, warn ... to global
  for (const prop in context) {
    if (context.hasOwnProperty(prop)) {
      const anyContext: any = context
      runnerGlobal[prop] = anyContext[prop]
    }
  }

  // Setup a runtime environment
  const hasteConfig = { automock: false, maxWorkers: 1, resetCache: false }
  const hasteMap = await Runtime.createHasteMap(config, hasteConfig).build()
  const resolver = Runtime.createResolver(config, hasteMap.moduleMap)
  const runtime = new Runtime(config, environment, resolver)

  return {
    context,
    environment,
    runtime
  }
}

#!/usr/bin/env node
/* eslint-disable */
const jestRuntime = require('jest-runtime');

const oldexecModule = jestRuntime.prototype._execModule;

jestRuntime.prototype._execModule = function _execModule(localModule, options) {
  // Do not apply esm to dependencies & test files to have access to jest globals
  if (
    localModule.id.includes('node_modules') ||
    localModule.id.includes('__tests__')
  ) {
    return oldexecModule.apply(this, [localModule, options]);
  }
  localModule.exports = require('esm')(localModule)(localModule.id);
  return localModule;
};

cli = require('jest/bin/jest');