| 1 | 'use strict'; |
| 2 | |
| 3 | const getComments = require('./getComments'); |
| 4 | |
| 5 | const GATE_VERSION_STR = '@reactVersion '; |
| 6 | const REACT_VERSION_ENV = process.env.REACT_VERSION; |
| 7 | |
| 8 | function transform(babel) { |
| 9 | const {types: t} = babel; |
| 10 | |
| 11 | // Runs tests conditionally based on the version of react (semver range) we are running |
| 12 | // Input: |
| 13 | // @reactVersion >= 17.0 |
| 14 | // test('some test', () => {/*...*/}) |
| 15 | // |
| 16 | // Output: |
| 17 | // @reactVersion >= 17.0 |
| 18 | // _test_react_version('>= 17.0', 'some test', () => {/*...*/}); |
| 19 | // |
| 20 | // See info about semver ranges here: |
| 21 | // https://www.npmjs.com/package/semver |
| 22 | function buildGateVersionCondition(comments) { |
| 23 | if (!comments) { |
| 24 | return null; |
| 25 | } |
| 26 | |
| 27 | const resultingCondition = comments.reduce( |
| 28 | (accumulatedCondition, commentLine) => { |
| 29 | const commentStr = commentLine.value.trim(); |
| 30 | |
| 31 | if (!commentStr.startsWith(GATE_VERSION_STR)) { |
| 32 | return accumulatedCondition; |
| 33 | } |
| 34 | |
| 35 | const condition = commentStr.slice(GATE_VERSION_STR.length); |
| 36 | if (accumulatedCondition === null) { |
| 37 | return condition; |
| 38 | } |
| 39 | |
| 40 | return accumulatedCondition.concat(' ', condition); |
| 41 | }, |
| 42 | null |
| 43 | ); |
| 44 | |
| 45 | if (resultingCondition === null) { |
| 46 | return null; |
| 47 | } |
| 48 | |
| 49 | return t.stringLiteral(resultingCondition); |
| 50 | } |
| 51 | |
| 52 | return { |
| 53 | name: 'transform-react-version-pragma', |
| 54 | visitor: { |
| 55 | ExpressionStatement(path) { |
| 56 | const statement = path.node; |
| 57 | const expression = statement.expression; |
| 58 | if (expression.type === 'CallExpression') { |
| 59 | const callee = expression.callee; |
| 60 | switch (callee.type) { |
| 61 | case 'Identifier': { |
| 62 | if ( |
| 63 | callee.name === 'test' || |
| 64 | callee.name === 'it' || |
| 65 | callee.name === 'fit' |
| 66 | ) { |
| 67 | const comments = getComments(path); |
| 68 | const condition = buildGateVersionCondition(comments); |
| 69 | if (condition !== null) { |
| 70 | callee.name = |
| 71 | callee.name === 'fit' |
| 72 | ? '_test_react_version_focus' |
| 73 | : '_test_react_version'; |
| 74 | expression.arguments = [condition, ...expression.arguments]; |
| 75 | } else if (REACT_VERSION_ENV) { |
| 76 | callee.name = '_test_ignore_for_react_version'; |
| 77 | } |
| 78 | } |
| 79 | break; |
| 80 | } |
| 81 | case 'MemberExpression': { |
| 82 | if ( |
| 83 | callee.object.type === 'Identifier' && |
| 84 | (callee.object.name === 'test' || |
| 85 | callee.object.name === 'it') && |
| 86 | callee.property.type === 'Identifier' && |
| 87 | callee.property.name === 'only' |
| 88 | ) { |
| 89 | const comments = getComments(path); |
| 90 | const condition = buildGateVersionCondition(comments); |
| 91 | if (condition !== null) { |
| 92 | statement.expression = t.callExpression( |
| 93 | t.identifier('_test_react_version_focus'), |
| 94 | [condition, ...expression.arguments] |
| 95 | ); |
| 96 | } else if (REACT_VERSION_ENV) { |
| 97 | statement.expression = t.callExpression( |
| 98 | t.identifier('_test_ignore_for_react_version'), |
| 99 | expression.arguments |
| 100 | ); |
| 101 | } |
| 102 | } |
| 103 | break; |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | return; |
| 108 | }, |
| 109 | }, |
| 110 | }; |
| 111 | } |
| 112 | |
| 113 | module.exports = transform; |