CodeSampleX

示例

babel-plugin-istanbul 6.1.1

已验证示例 — npm babel-plugin-istanbul 6.1.1. contract 在 node 22 · linux alpine/x64 · docker 上运行并通过： babel-plugin-istanbul default export is a Babel plugin…

sha256:1dca9522f2fbfd3a4eefeb8d6cbba570880c202234651872598c820470d6a069

本网络只提供一件事：能构建的样本。它在沙箱中运行并保留签名回执。它不评级、不担保——同样的代码能否在你的环境构建，它没有测量过。 提交了通过的契约回执的不同签名密钥数量。为 1 表示只有作者；大于 1 表示还有其他人构建过。密钥是自行生成的，背后没有注册身份，因此计的是密钥而非人。 MIT-0

执行证据

声明的环境与签名的运行分开呈现，你可以看到这个样本究竟运行了什么、在哪里运行。

证据依据
签名契约通过
验证回执
1
构建过它的签名密钥
1
声明的环境 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

验证运行环境

环境 契约 阶段 运行日期
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…		 2026-08-27

案例

HOW
目标
verify pkg:npm/babel-plugin-istanbul@6.1.1
包
环境
node 22.23.2
创建时间
2026-08-27T12:29:53Z

契约

  1. babel-plugin-istanbul default export is a Babel plugin function declaring Babel 7 compatibility
  2. Plugin visitor exposes Program enter and exit lifecycle handlers
  3. Program visitor initializes NYC configuration with default and custom options
  4. Program visitor respects include and exclude filter patterns to skip non-matching files
  5. Program visitor generates AST instrumentation and records coverage metrics on Program exit
  6. Program visitor invokes onCover callback with resolved file path and coverage metadata
  7. Program visitor supports custom coverageVariable configuration

文件

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.mjs
  • test/contract.mjs

下载源代码构件 (tar.gz)

源代码

PROMPT.md
Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify pkg:npm/babel-plugin-istanbul@6.1.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/babel-plugin-istanbul@6.1.1
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.
csx.json
{"case":{"caseId":"case:sha256:31d2b286da920d750f51bc00014ef81b1089e476493c3e0c9c3f2b094f96f522","constraints":{"executionContext":"node"},"contract":["babel-plugin-istanbul default export is a Babel plugin function declaring Babel 7 compatibility","Plugin visitor exposes Program enter and exit lifecycle handlers","Program visitor initializes NYC configuration with default and custom options","Program visitor respects include and exclude filter patterns to skip non-matching files","Program visitor generates AST instrumentation and records coverage metrics on Program exit","Program visitor invokes onCover callback with resolved file path and coverage metadata","Program visitor supports custom coverageVariable configuration"],"goal":"verify pkg:npm/babel-plugin-istanbul@6.1.1","kind":"HOW","packages":["pkg:npm/babel-plugin-istanbul@6.1.1"],"schemaVersion":1},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/babel-plugin-istanbul@6.1.1"],"schemaVersion":1,"subject":"pkg:npm/babel-plugin-istanbul@6.1.1","verifierAdapter":"node-typescript@1"}
package-lock.json
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  "name": "sample-babel-plugin-istanbul",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
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    "": {
      "name": "sample-babel-plugin-istanbul",
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      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
      "license": "ISC"
    },
    "node_modules/yallist": {
      "version": "3.1.1",
      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==",
      "license": "ISC"
    }
  }
}
package.json
{
  "name": "sample-babel-plugin-istanbul",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "babel-plugin-istanbul": "6.1.1"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/babel-plugin-istanbul@6.1.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/babel-plugin-istanbul@6.1.1"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
src/index.mjs
import babelPluginIstanbulModule from "babel-plugin-istanbul";

export const babelPluginIstanbul =
  typeof babelPluginIstanbulModule === "function"
    ? babelPluginIstanbulModule
    : babelPluginIstanbulModule.default || babelPluginIstanbulModule;

export function instantiatePlugin(api = {}, options = {}) {
  const normalizedApi = {
    assertVersion: (range) => {
      if (typeof api.assertVersion === "function") {
        api.assertVersion(range);
      }
    },
    types: api.types || createDefaultTypes(),
    ...api
  };
  return babelPluginIstanbul(normalizedApi, options);
}

export function createDefaultTypes() {
  return {
    valueToNode: (v) => ({ type: "ObjectExpression", value: v }),
    program: (body) => ({ type: "Program", body }),
    stringLiteral: (v) => ({ type: "StringLiteral", value: v }),
    numericLiteral: (v) => ({ type: "NumericLiteral", value: v }),
    identifier: (name) => ({ type: "Identifier", name }),
    booleanLiteral: (v) => ({ type: "BooleanLiteral", value: v }),
    nullLiteral: () => ({ type: "NullLiteral" }),
    callExpression: (callee, args) => ({ type: "CallExpression", callee, arguments: args }),
    expressionStatement: (expression) => ({ type: "ExpressionStatement", expression }),
    variableDeclaration: (kind, declarations) => ({ type: "VariableDeclaration", kind, declarations }),
    isStatement: () => false,
    isExpression: () => true
  };
}

export function createMockProgramPath(filename = "sample.js") {
  const body = [];
  const comments = [];
  const scope = {
    hasBinding: () => false,
    getBinding: () => null
  };

  const path = {
    node: {
      type: "Program",
      body,
      comments
    },
    scope,
    isProgram() {
      return true;
    },
    find(fn) {
      return fn(this) ? this : null;
    },
    traverse(visitor, state) {
      // traversal simulation
    },
    unshiftContainer(listKey, nodes) {
      const arr = Array.isArray(nodes) ? nodes : [nodes];
      this.node.body.unshift(...arr);
    }
  };

  return path;
}

export function createVisitorContext(filename, options = {}) {
  return {
    opts: {
      cwd: process.cwd(),
      ...options
    },
    file: {
      opts: {
        filename
      }
    }
  };
}

export function simulatePluginExecution(pluginInstance, context, path) {
  if (!pluginInstance?.visitor?.Program) {
    throw new Error("Invalid plugin instance: missing Program visitor");
  }

  pluginInstance.visitor.Program.enter.call(context, path);
  pluginInstance.visitor.Program.exit.call(context, path);

  return {
    instrumented: Boolean(context.__dv__),
    nycConfig: context.nycConfig,
    body: path.node.body
  };
}
test/contract.mjs
import assert from "node:assert/strict";
import babelPluginIstanbulModule from "babel-plugin-istanbul";
import {
  babelPluginIstanbul,
  instantiatePlugin,
  createDefaultTypes,
  createMockProgramPath,
  createVisitorContext,
  simulatePluginExecution
} from "../src/index.mjs";

const rawPlugin =
  typeof babelPluginIstanbulModule === "function"
    ? babelPluginIstanbulModule
    : babelPluginIstanbulModule.default || babelPluginIstanbulModule;

// Contract 1: babel-plugin-istanbul default export is a Babel plugin function declaring Babel 7 compatibility
{
  assert.equal(typeof babelPluginIstanbul, "function");
  assert.equal(typeof rawPlugin, "function");

  let assertedVersion = null;
  const mockApi = {
    assertVersion: (v) => {
      assertedVersion = v;
    },
    types: createDefaultTypes()
  };

  const instance = rawPlugin(mockApi, {});
  assert.equal(assertedVersion, 7);
  assert.ok(instance && typeof instance === "object");
  assert.ok(instance.visitor);
}

// Contract 2: Plugin visitor exposes Program enter and exit lifecycle handlers
{
  const mockApi = {
    assertVersion: () => {},
    types: createDefaultTypes()
  };

  const instance = instantiatePlugin(mockApi, {});
  assert.ok(instance.visitor.Program);
  assert.equal(typeof instance.visitor.Program.enter, "function");
  assert.equal(typeof instance.visitor.Program.exit, "function");
}

// Contract 3: Program visitor initializes NYC configuration with default and custom options
{
  const mockApi = {
    assertVersion: () => {},
    types: createDefaultTypes()
  };
  const instance = instantiatePlugin(mockApi, {});

  const customOptions = {
    cwd: process.cwd(),
    include: ["src/**/*.js"],
    exclude: ["**/*.spec.js"],
    extension: [".js", ".jsx"]
  };

  const context = createVisitorContext(process.cwd() + "/src/sample.js", customOptions);
  const path = createMockProgramPath("src/sample.js");

  instance.visitor.Program.enter.call(context, path);
  assert.ok(context.nycConfig);
  assert.equal(context.nycConfig.cwd, process.cwd());
  assert.deepEqual(context.nycConfig.include, ["src/**/*.js"]);
  assert.deepEqual(context.nycConfig.exclude, ["**/*.spec.js"]);
  assert.deepEqual(context.nycConfig.extension, [".js", ".jsx"]);
}

// Contract 4: Program visitor respects include and exclude filter patterns to skip non-matching files
{
  const mockApi = {
    assertVersion: () => {},
    types: createDefaultTypes()
  };

  // Matching file in include pattern: should be instrumented
  {
    const instance = instantiatePlugin(mockApi, {});
    const context = createVisitorContext(process.cwd() + "/src/feature.js", {
      cwd: process.cwd(),
      include: ["src/**/*.js"]
    });
    const path = createMockProgramPath("src/feature.js");
    const result = simulatePluginExecution(instance, context, path);
    assert.equal(result.instrumented, true);
    assert.ok(result.body.length > 0);
  }

  // Excluded file in exclude pattern: should be skipped
  {
    const instance = instantiatePlugin(mockApi, {});
    const context = createVisitorContext(process.cwd() + "/src/feature.spec.js", {
      cwd: process.cwd(),
      include: ["src/**/*.js"],
      exclude: ["**/*.spec.js"]
    });
    const path = createMockProgramPath("src/feature.spec.js");
    const result = simulatePluginExecution(instance, context, path);
    assert.equal(result.instrumented, false);
    assert.equal(result.body.length, 0);
  }

  // File outside include pattern: should be skipped
  {
    const instance = instantiatePlugin(mockApi, {});
    const context = createVisitorContext(process.cwd() + "/test/my-test.js", {
      cwd: process.cwd(),
      include: ["src/**/*.js"]
    });
    const path = createMockProgramPath("test/my-test.js");
    const result = simulatePluginExecution(instance, context, path);
    assert.equal(result.instrumented, false);
    assert.equal(result.body.length, 0);
  }

  // node_modules file: should be skipped by default node_modules exclusion
  {
    const instance = instantiatePlugin(mockApi, {});
    const context = createVisitorContext(process.cwd() + "/node_modules/dep/index.js", {
      cwd: process.cwd(),
      include: ["**/*.js"]
    });
    const path = createMockProgramPath("node_modules/dep/index.js");
    const result = simulatePluginExecution(instance, context, path);
    assert.equal(result.instrumented, false);
    assert.equal(result.body.length, 0);
  }
}

// Contract 5: Program visitor generates AST instrumentation and records coverage metrics on Program exit
{
  const mockApi = {
    assertVersion: () => {},
    types: createDefaultTypes()
  };
  const instance = instantiatePlugin(mockApi, {});
  const filePath = process.cwd() + "/src/calculator.js";
  const context = createVisitorContext(filePath, {
    cwd: process.cwd(),
    include: ["src/**/*.js"]
  });
  const path = createMockProgramPath("src/calculator.js");

  instance.visitor.Program.enter.call(context, path);
  assert.ok(context.__dv__);

  const initialBodyCount = path.node.body.length;
  instance.visitor.Program.exit.call(context, path);

  // Program body should have prepended coverage template nodes
  assert.ok(path.node.body.length > initialBodyCount);
  const firstStatement = path.node.body[0];
  assert.ok(firstStatement);
}

// Contract 6: Program visitor invokes onCover callback with resolved file path and coverage metadata
{
  let onCoverCalled = false;
  let receivedFilename = null;
  let receivedCoverage = null;

  const mockApi = {
    assertVersion: () => {},
    types: createDefaultTypes()
  };
  const instance = instantiatePlugin(mockApi, {});
  const filePath = process.cwd() + "/src/service.js";

  const context = createVisitorContext(filePath, {
    cwd: process.cwd(),
    include: ["src/**/*.js"],
    onCover: (filename, coverage) => {
      onCoverCalled = true;
      receivedFilename = filename;
      receivedCoverage = coverage;
    }
  });
  const path = createMockProgramPath("src/service.js");

  simulatePluginExecution(instance, context, path);

  assert.equal(onCoverCalled, true);
  assert.equal(receivedFilename, filePath);
  assert.ok(receivedCoverage);
  assert.equal(receivedCoverage.path, filePath);
  assert.ok(typeof receivedCoverage.statementMap === "object");
  assert.ok(typeof receivedCoverage.fnMap === "object");
  assert.ok(typeof receivedCoverage.branchMap === "object");
  assert.ok(typeof receivedCoverage.s === "object");
  assert.ok(typeof receivedCoverage.f === "object");
  assert.ok(typeof receivedCoverage.b === "object");
}

// Contract 7: Program visitor supports custom coverageVariable configuration
{
  let receivedCoverageVar = null;
  const mockApi = {
    assertVersion: () => {},
    types: createDefaultTypes()
  };
  const instance = instantiatePlugin(mockApi, {});
  const customVarName = "__CUSTOM_ISTANBUL_COVERAGE__";

  const context = createVisitorContext(process.cwd() + "/src/custom-var.js", {
    cwd: process.cwd(),
    include: ["src/**/*.js"],
    coverageVariable: customVarName,
    onCover: (filename, coverage) => {
      receivedCoverageVar = context.nycConfig?.coverageVariable;
    }
  });
  const path = createMockProgramPath("src/custom-var.js");

  simulatePluginExecution(instance, context, path);

  assert.equal(receivedCoverageVar, customVarName);
}

console.log("All babel-plugin-istanbul contract tests passed successfully.");

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