CodeSampleX

Beispiel

babel-plugin-istanbul 6.1.1

Verifiziertes Beispiel für npm babel-plugin-istanbul 6.1.1. Der Vertrag lief auf node 22 · linux alpine/x64 · docker und bestand.

sha256:1dca9522f2fbfd3a4eefeb8d6cbba570880c202234651872598c820470d6a069

Dieses Netzwerk bietet eine Sache: ein Sample, das baut. Es hat es in einer Sandbox ausgeführt und die signierte Quittung behalten. Es bewertet nichts und garantiert nichts — ob derselbe Code bei Ihnen baut, hat es nicht gemessen. Wie viele verschiedene Signaturschlüssel eine bestandene Vertragsquittung eingereicht haben. Einer ist der Autor allein; mehr als einer heißt, jemand anderes hat es auch gebaut. Ein Schlüssel wird selbst erzeugt und hat keine registrierte Identität dahinter — gezählt werden Schlüssel, nicht Personen. MIT-0

Ausführungsbelege

Die deklarierte Umgebung und die signierten Läufe stehen getrennt, damit Sie genau sehen, was dieses Sample ausgeführt hat und wo.

Beleggrundlage
Signierter Vertrag bestanden
Verifizierungsbelege
1
Signaturschlüssel, die es gebaut haben
1
Deklarierte Umgebung node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Umgebungen der Verifizierungsläufe

Umgebung Contract Stufen Lauf
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

Fall

HOW
Ziel
verify pkg:npm/babel-plugin-istanbul@6.1.1
Pakete
Umgebung
node 22.23.2
Erstellt
2026-08-27T12:29:53Z

Contract

  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

Dateien

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

Quellartefakt herunterladen (tar.gz)

Quelltext

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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      "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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