babel-plugin-transform-adana/coverage/coverage.json

A better instanbul.

{"src/meta.js":{"source":"\nexport default function meta(state, value) {\n  if (arguments.length > 1) {\n    state.file.metadata.coverage = value;\n  }\n  return state.file.metadata.coverage;\n}\n","path":"src/meta.js","locations":[{"id":0,"loc":{"start":{"line":2,"column":15},"end":{"line":7,"column":1}},"tags":["function"],"name":"meta","count":11},{"id":1,"loc":{"start":{"line":3,"column":28},"end":{"line":5,"column":3}},"tags":["branch","line","if"],"group":"3:2","count":1},{"id":2,"loc":{"start":{"line":5,"column":3},"end":{"line":5,"column":3}},"tags":["branch","if"],"group":"3:2","count":10},{"id":3,"loc":{"start":{"line":4,"column":4},"end":{"line":4,"column":41}},"tags":["statement","line"],"count":1},{"id":4,"loc":{"start":{"line":6,"column":9},"end":{"line":6,"column":37}},"tags":["line","statement"],"count":11}]},"src/prelude.js":{"source":"/* global __dirname */\n\nimport {readFileSync} from 'fs';\nimport path from 'path';\nimport template from '@babel/template';\nimport astify from 'babel-literal-to-ast';\nimport meta from './meta';\n\nconst render = template(readFileSync(\n  path.join(__dirname, '..', 'share', 'prelude.js'), 'utf8'\n));\n\nexport default function prelude(state) {\n  const coverage = meta(state);\n  const global = (state.opts && state.opts.global) || '__coverage__';\n  return render({\n    GLOBAL: astify(global),\n    SOURCE: astify(coverage.source),\n    VARIABLE: coverage.variable,\n    FILE: astify(coverage.name),\n    LOCATIONS: astify(coverage.entries),\n  });\n}\n","path":"src/prelude.js","locations":[{"id":0,"loc":{"start":{"line":9,"column":15},"end":{"line":11,"column":2}},"tags":["statement","variable","line"],"count":1},{"id":1,"loc":{"start":{"line":13,"column":15},"end":{"line":23,"column":1}},"tags":["function"],"name":"prelude","count":1},{"id":2,"loc":{"start":{"line":14,"column":19},"end":{"line":14,"column":30}},"tags":["statement","variable","line"],"count":1},{"id":3,"loc":{"start":{"line":15,"column":17},"end":{"line":15,"column":68}},"tags":["statement","variable","line"],"count":1},{"id":4,"loc":{"start":{"line":15,"column":18},"end":{"line":15,"column":49}},"tags":["branch","logic"],"group":"15:17","count":1},{"id":5,"loc":{"start":{"line":15,"column":54},"end":{"line":15,"column":68}},"tags":["branch","logic"],"group":"15:17","count":1},{"id":6,"loc":{"start":{"line":15,"column":18},"end":{"line":15,"column":28}},"tags":["branch","logic"],"group":"15:18","count":1},{"id":7,"loc":{"start":{"line":15,"column":32},"end":{"line":15,"column":49}},"tags":["branch","logic"],"group":"15:18","count":1},{"id":8,"loc":{"start":{"line":16,"column":9},"end":{"line":22,"column":4}},"tags":["line","statement"],"count":1},{"id":9,"loc":{"start":{"line":17,"column":12},"end":{"line":17,"column":26}},"tags":["line"],"count":1},{"id":10,"loc":{"start":{"line":18,"column":12},"end":{"line":18,"column":35}},"tags":["line"],"count":1},{"id":11,"loc":{"start":{"line":19,"column":14},"end":{"line":19,"column":31}},"tags":["line"],"count":1},{"id":12,"loc":{"start":{"line":20,"column":10},"end":{"line":20,"column":31}},"tags":["line"],"count":1},{"id":13,"loc":{"start":{"line":21,"column":15},"end":{"line":21,"column":39}},"tags":["line"],"count":1}]},"src/tags.js":{"source":"import meta from './meta';\n\nconst COMMENT_PATTERN = /^\\s*@?(adana|coverage|test|istanbul):?\\s*(.*)\\s*/;\n\nfunction within(a, b) {\n  return a.start.line >= b.start.line &&\n    a.start.column >= b.start.column &&\n    a.end.line <= b.end.line &&\n    a.end.column <= b.end.column;\n}\n\nexport function applyRules(state) {\n  const coverage = meta(state);\n  coverage.entries.forEach((entry) => {\n    const result = { };\n    const output = [];\n    entry.tags.forEach((tag) => {\n      result[tag] = true;\n    });\n    coverage.rules.forEach((rule) => {\n      if (within(rule.loc, entry.loc)) {\n        result[rule.tag] = rule.value;\n      }\n    });\n    Object.keys(result).forEach((tag) => {\n      const value = result[tag];\n      if (value) {\n        output.push(tag);\n      }\n    });\n    entry.tags = output;\n  });\n}\n\nexport function extract(comment) {\n  const output = { };\n  const result = COMMENT_PATTERN.exec(comment);\n  if (result) {\n    const entries = result[2].split(/\\s+/);\n    entries.forEach((entry) => {\n      switch (entry.charAt(0)) {\n      case '+':\n        output[entry.substr(1)] = true;\n        break;\n      case '-':\n        output[entry.substr(1)] = false;\n        break;\n      default:\n        break;\n      }\n    });\n  }\n  return output;\n}\n\nexport function addRules(state, loc, comments) {\n  if (comments) {\n    const coverage = meta(state);\n    comments.forEach((comment) => {\n      const values = extract(comment.value);\n      Object.keys(values).forEach((tag) => {\n        coverage.rules.push({\n          tag,\n          value: values[tag],\n          loc,\n        });\n      });\n    });\n  }\n}\n","path":"src/tags.js","locations":[{"id":0,"loc":{"start":{"line":3,"column":24},"end":{"line":3,"column":74}},"tags":["statement","variable","line"],"count":1},{"id":1,"loc":{"start":{"line":5,"column":0},"end":{"line":10,"column":1}},"tags":["function"],"name":"within","count":0},{"id":2,"loc":{"start":{"line":6,"column":9},"end":{"line":9,"column":32}},"tags":["line","statement"],"count":0},{"id":3,"loc":{"start":{"line":6,"column":9},"end":{"line":8,"column":28}},"tags":["branch","logic"],"group":"6:9","count":0},{"id":4,"loc":{"start":{"line":9,"column":4},"end":{"line":9,"column":32}},"tags":["branch","logic"],"group":"6:9","count":0},{"id":5,"loc":{"start":{"line":6,"column":9},"end":{"line":7,"column":36}},"tags":["branch","logic"],"group":"6:9","count":0},{"id":6,"loc":{"start":{"line":8,"column":4},"end":{"line":8,"column":28}},"tags":["branch","logic"],"group":"6:9","count":0},{"id":7,"loc":{"start":{"line":6,"column":9},"end":{"line":6,"column":37}},"tags":["branch","logic"],"group":"6:9","count":0},{"id":8,"loc":{"start":{"line":7,"column":4},"end":{"line":7,"column":36}},"tags":["branch","logic"],"group":"6:9","count":0},{"id":9,"loc":{"start":{"line":12,"column":7},"end":{"line":33,"column":1}},"tags":["function"],"name":"applyRules","count":1},{"id":10,"loc":{"start":{"line":13,"column":19},"end":{"line":13,"column":30}},"tags":["statement","variable","line"],"count":1},{"id":11,"loc":{"start":{"line":14,"column":2},"end":{"line":32,"column":5}},"tags":["statement","line"],"count":1},{"id":12,"loc":{"start":{"line":14,"column":27},"end":{"line":32,"column":3}},"tags":["function"],"name":"@14:27","count":8},{"id":13,"loc":{"start":{"line":15,"column":19},"end":{"line":15,"column":22}},"tags":["statement","variable","line"],"count":8},{"id":14,"loc":{"start":{"line":16,"column":19},"end":{"line":16,"column":21}},"tags":["statement","variable","line"],"count":8},{"id":15,"loc":{"start":{"line":17,"column":4},"end":{"line":19,"column":7}},"tags":["statement","line"],"count":8},{"id":16,"loc":{"start":{"line":17,"column":23},"end":{"line":19,"column":5}},"tags":["function"],"name":"@17:23","count":17},{"id":17,"loc":{"start":{"line":18,"column":6},"end":{"line":18,"column":25}},"tags":["statement","line"],"count":17},{"id":18,"loc":{"start":{"line":20,"column":4},"end":{"line":24,"column":7}},"tags":["statement","line"],"count":8},{"id":19,"loc":{"start":{"line":20,"column":27},"end":{"line":24,"column":5}},"tags":["function"],"name":"@20:27","count":0},{"id":20,"loc":{"start":{"line":21,"column":39},"end":{"line":23,"column":7}},"tags":["branch","line","if"],"group":"21:6","count":0},{"id":21,"loc":{"start":{"line":23,"column":7},"end":{"line":23,"column":7}},"tags":["branch","if"],"group":"21:6","count":0},{"id":22,"loc":{"start":{"line":22,"column":8},"end":{"line":22,"column":38}},"tags":["statement","line"],"count":0},{"id":23,"loc":{"start":{"line":25,"column":4},"end":{"line":30,"column":7}},"tags":["statement","line"],"count":8},{"id":24,"loc":{"start":{"line":25,"column":32},"end":{"line":30,"column":5}},"tags":["function"],"name":"@25:32","count":17},{"id":25,"loc":{"start":{"line":26,"column":20},"end":{"line":26,"column":31}},"tags":["statement","variable","line"],"count":17},{"id":26,"loc":{"start":{"line":27,"column":17},"end":{"line":29,"column":7}},"tags":["branch","line","if"],"group":"27:6","count":17},{"id":27,"loc":{"start":{"line":29,"column":7},"end":{"line":29,"column":7}},"tags":["branch","if"],"group":"27:6","count":0},{"id":28,"loc":{"start":{"line":28,"column":8},"end":{"line":28,"column":25}},"tags":["statement","line"],"count":17},{"id":29,"loc":{"start":{"line":31,"column":4},"end":{"line":31,"column":24}},"tags":["statement","line"],"count":8},{"id":30,"loc":{"start":{"line":35,"column":7},"end":{"line":54,"column":1}},"tags":["function"],"name":"extract","count":0},{"id":31,"loc":{"start":{"line":36,"column":17},"end":{"line":36,"column":20}},"tags":["statement","variable","line"],"count":0},{"id":32,"loc":{"start":{"line":37,"column":17},"end":{"line":37,"column":46}},"tags":["statement","variable","line"],"count":0},{"id":33,"loc":{"start":{"line":38,"column":14},"end":{"line":52,"column":3}},"tags":["branch","line","if"],"group":"38:2","count":0},{"id":34,"loc":{"start":{"line":52,"column":3},"end":{"line":52,"column":3}},"tags":["branch","if"],"group":"38:2","count":0},{"id":35,"loc":{"start":{"line":39,"column":20},"end":{"line":39,"column":42}},"tags":["statement","variable","line"],"count":0},{"id":36,"loc":{"start":{"line":40,"column":4},"end":{"line":51,"column":7}},"tags":["statement","line"],"count":0},{"id":37,"loc":{"start":{"line":40,"column":20},"end":{"line":51,"column":5}},"tags":["function"],"name":"@40:20","count":0},{"id":38,"loc":{"start":{"line":42,"column":6},"end":{"line":44,"column":14}},"tags":["branch","switch"],"group":"41:6","count":0},{"id":39,"loc":{"start":{"line":45,"column":6},"end":{"line":47,"column":14}},"tags":["branch",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* as types from '@babel/types';\nimport micromatch from 'micromatch';\nimport {relative} from 'path';\n\nimport prelude from './prelude';\nimport meta from './meta';\nimport {applyRules, addRules} from './tags';\n\nexport function skip({ignore, only}, file) {\n  if (only) {\n    return micromatch(\n      [file],\n      Array.isArray(only) ? only : [only],\n      {nocase: true}\n    ).length <= 0;\n  }\n  if (ignore) {\n    return micromatch(\n      [file],\n      Array.isArray(ignore) ? ignore : [ignore],\n      {nocase: true}\n    ).length > 0;\n  }\n  return false;\n}\n\n/**\n * Create an opaque, unique key for a given node. Useful for tagging the node\n * in separate places.\n * @param {Object} path Babel path to derive key from.\n * @returns {String} String key.\n */\nexport function key(path) {\n  const node = path.node;\n  if (node.loc) {\n    const location = node.loc.start;\n    return `${location.line}:${location.column}`;\n  }\n  throw new TypeError('Path must have valid location.');\n}\n\n/**\n * Some nodes need to marked as non-instrumentable; since babel will apply\n * our plugin to nodes we create, we have to be careful to not put ourselves\n * into an infinite loop.\n * @param {Object} node Babel AST node.\n * @returns {Object} Babel AST node that won't be instrumented.\n */\nfunction X(node) {\n  node.__adana = true;\n  return node;\n}\n\nfunction ignore(path) {\n  return (!path.node || !path.node.loc || path.node.__adana);\n}\n\nfunction standardize(listener) {\n  return (path, state) => ignore(path) ? undefined : listener(path, state);\n}\n\n/**\n * Create the transform-adana babel plugin.\n * @returns {Object} `babel` plugin object.\n */\nexport default function instrumenter() {\n  /**\n   * Create a chunk of code that marks the specified node as having\n   * been executed.\n   * @param {Object} state `babel` state for the path that's being walked.\n   * @param {Object} options Configure how the marker behaves.\n   * @returns {Object} AST node for marking coverage.\n   */\n  function createMarker(state, options) {\n    const {tags, loc, name, group} = options;\n    const coverage = meta(state);\n    const id = coverage.entries.length;\n\n    coverage.entries.push({\n      id,\n      loc,\n      tags,\n      name,\n      group,\n      count: 0,\n    });\n\n    // Maker is simply a statement incrementing a coverage variable.\n    return X(types.updateExpression('++', types.memberExpression(\n      types.memberExpression(\n        coverage.variable,\n        types.numericLiteral(id),\n        true\n      ),\n      types.stringLiteral('count'),\n      true\n    ), true));\n  }\n\n  /**\n   * [isInstrumentableStatement description]\n   * @param   {[type]}  path [description]\n   * @returns {Boolean}      [description]\n   */\n  function isInstrumentableStatement(path) {\n    const parent = path.parentPath;\n    return !parent.isReturnStatement() &&\n      !parent.isVariableDeclaration() &&\n      !parent.isExportDeclaration() &&\n      !parent.isFunctionDeclaration() &&\n      !parent.isIfStatement();\n  }\n\n  /**\n   * Inject a marker that measures whether the node for the given path has\n   * been run or not.\n   * @param {Object} path    [description]\n   * @param {Object} state   [description]\n   * @param {Object} options [description]\n   * @returns {void}\n   */\n  function instrument(path, state, options) {\n    // This function is here because isInstrumentableStatement() is being\n    // called; we can't create the marker without knowing the result of that,\n    // otherwise dead markers will be created.\n    function marker() {\n      return createMarker(state, {\n        loc: path.node.loc,\n        ...options,\n      });\n    }\n\n    if (path.isBlockStatement()) {\n      path.unshiftContainer('body', X(types.expressionStatement(marker())));\n    } else if (path.isExpression()) {\n      path.replaceWith(X(types.sequenceExpression([marker(), path.node])));\n    } else if (path.isStatement()) {\n      if (isInstrumentableStatement(path)) {\n        path.insertBefore(X(types.expressionStatement(marker())));\n      }\n    }\n  }\n\n  /**\n   * [visitStatement description]\n   * @param {[type]} path  [description]\n   * @param {[type]} state [description]\n   * @returns {void}\n   */\n  function visitStatement(path, state) {\n    instrument(path, state, {\n      tags: ['statement', 'line'],\n      loc: path.node.loc,\n    });\n  }\n\n  /**\n   * The function visitor is mainly to track the definitions of functions;\n   * being able ensure how many of your functions have actually been invoked.\n   * @param {[type]} path  [description]\n   * @param {[type]} state [description]\n   * @returns {void}\n   */\n  function visitFunction(path, state) {\n    instrument(path.get('body'), state, {\n      tags: ['function'],\n      name: path.node.id ? path.node.id.name : `@${key(path)}`,\n      loc: path.node.loc,\n    });\n  }\n\n  /**\n   * Multiple branches based on the result of `case _` and `default`. If you\n   * do not provide a `default` one will be intelligently added for you,\n   * forcing you to cover that case.\n   * @param {[type]} path  [description]\n   * @param {[type]} state [description]\n   * @returns {void}\n   */\n  function visitSwitchStatement(path, state) {\n    let hasDefault = false;\n    path.get('cases').forEach((entry) => {\n      if (entry.node.test) {\n        addRules(state, entry.node.loc, entry.node.test.trailingComments);\n      }\n      if (entry.node.consequent.length > 1) {\n        addRules(\n          state,\n          entry.node.loc,\n          entry.node.consequent[0].leadingComments\n        );\n      }\n\n      if (entry.node.test === null) {\n        hasDefault = true;\n      }\n      entry.unshiftContainer('consequent', createMarker(state, {\n        tags: ['branch', 'switch'],\n        loc: entry.node.loc,\n        group: key(path),\n      }));\n    });\n\n    // Default is technically a branch, just like if statements without\n    // else's are also technically a branch.\n    if (!hasDefault) {\n      // Add an extra break to the end of the last case in case some idiot\n      // forgot to add it.\n      const cases = path.get('cases');\n      if (cases.length > 0) {\n        cases[cases.length - 1].pushContainer(\n          'consequent',\n          types.breakStatement()\n        );\n      }\n      // Finally add the default case.\n      path.pushContainer('cases', types.switchCase(null, [\n        types.expressionStatement(createMarker(state, {\n          tags: ['branch', 'switch'],\n          loc: {\n            start: path.node.loc.end,\n            end: path.node.loc.end,\n          },\n          group: key(path),\n        })),\n        types.breakStatement(),\n      ]));\n    }\n  }\n\n  /**\n   * [visitVariableDeclaration description]\n   * @param {[type]} path  [description]\n   * @param {[type]} state [description]\n   * @returns {void}\n   */\n  function visitVariableDeclaration(path, state) {\n    path.get('declarations').forEach((decl) => {\n      if (decl.has('init')) {\n        instrument(decl.get('init'), state, {\n          tags: ['statement', 'variable', 'line'],\n        });\n      }\n    });\n  }\n\n  /**\n   * Includes both while and do-while loops. They contain a single branch which\n   * tests the loop condition.\n   * @param {[type]} path  [description]\n   * @param {[type]} state [description]\n   * @returns {void}\n   */\n  function visitWhileLoop(path, state) {\n    const test = path.get('test');\n    const group = key(path);\n    // This is a particularly clever use of the fact JS operators are short-\n    // circuiting. To instrument a loop one _cannot_ add a marker on the outside\n    // of the loop body due to weird cases of things where loops are in non-\n    // block if statements. So instead, create the following mechanism:\n    // ((condition && A) || !B) where A and B are markers. Since markers are\n    // postfix, they're always true. Ergo, A is only incremented when condition\n    // is true, B only when it's false and the truth value of the whole\n    // statement is preserved. Neato.\n    test.replaceWith(types.logicalExpression(\n      '||',\n      types.logicalExpression(\n        '&&',\n        X(test.node),\n        createMarker(state, {\n          tags: ['branch', 'line', 'statement', 'loop', 'while'],\n          loc: test.node.loc,\n          group,\n        })\n      ),\n      types.unaryExpression(\n        '!',\n        createMarker(state, {\n          tags: ['branch', 'line', 'loop', 'while'],\n          loc: test.node.loc,\n          group,\n        })\n      )\n    ));\n  }\n\n  /**\n   * The try block can either fully succeed (no error) or it can throw. Both\n   * cases are accounted for.\n   * @param {[type]} path  [description]\n   * @param {[type]} state [description]\n   * @returns {void}\n   */\n  function visitTryStatement(path, state) {\n    const group = key(path);\n    const body = path.get('block');\n    const trigger = path.scope.generateDeclaredUidIdentifier('_exception');\n    addRules(state, body.node.loc, body.node.leadingComments);\n    path.get('block').unshiftContainer('body', types.expressionStatement(\n      types.assignmentExpression('=', trigger, types.booleanLiteral(true)),\n    ));\n    const handlerExpression = types.expressionStatement(\n      types.assignmentExpression('=', trigger, types.booleanLiteral(false)),\n    );\n    let handlerLoc;\n    if (path.has('handler')) {\n      const handler = path.get('handler').node;\n      handlerLoc = handler.loc;\n      addRules(state, handler.loc, handler.body.leadingComments);\n      path.get('handler.body').unshiftContainer(\n        'body',\n        handlerExpression\n      );\n    } else {\n      const loc = path.get('block').node.loc.end;\n      handlerLoc = {start: loc, end: loc};\n      path.get('handler').replaceWith(types.catchClause(\n        types.identifier('err'), types.blockStatement([\n          handlerExpression,\n          types.throwStatement(\n            types.identifier('err')\n          ),\n        ])\n      ));\n    }\n\n    const guard = types.ifStatement(\n      trigger,\n      types.expressionStatement(\n        createMarker(state, {\n          tags: ['branch', 'line', 'exception'],\n          loc: path.get('block').node.loc,\n          group,\n        })\n      ),\n      types.expressionStatement(\n        createMarker(state, {\n          tags: ['branch', 'line', 'exception'],\n          loc: handlerLoc,\n          group,\n        })\n      )\n    );\n\n    if (path.has('finalizer')) {\n      path.get('finalizer').unshiftContainer('body', guard);\n    } else {\n      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