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tapered-babel-plugin.js
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tapered-babel-plugin.js
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module.exports = function({types: t}) {
return {
visitor: {
Program(path, state) {
// if there are comments in the program file
if (path.parent.comments.length) {
const comments = path.parent.comments
// loop through the comments
for (let i = 0; i < comments.length; i += 1) {
// if a comment requires %tapered then add the containing file as a dependency
const reqFileName = "const " + state.file.opts.sourceMapTarget.slice(0, state.file.opts.sourceMapTarget.length - 3) + " = require('" + state.file.opts.filename + "');";
if (comments[i].value.includes("%tapered")) {
comments[i].value = " ß∂dNß0j1" + reqFileName;
}
if (comments[i].value.includes("%g")) {
let globalStart = comments[i].value.indexOf("%g");
comments[i].value = " ß∂dNß0j1" + comments[i].value.slice(globalStart + 2).replace(/^[ ]+|[ ]+$/g, '');
}
// ----------------------------------------------------------------------------
// SECTION INCLUDES NAME/DESCRIPTION - ASSERTION AND VARIABLES
// Split on >>:
if (comments[i].value.includes('>>:')) {
let currcomments = comments[i].value.split(">>:");
// currcomments[0] is empty
// if currcomments[1] = test name/description and is required
// if currcomments[1] contains an x: skip the test
let test = ' ß∂dNß0j1test';
let description = currcomments[1].replace(/\r\n/, "\n").split(/\n/)[0].replace(/^[ ]+|[ ]+$/g, '');
if (description[0] === 'x' && description[1] === ':') {
description = description.slice(2).replace(/^[ ]+|[ ]+$/g, '');
test = ' ß∂dNß0j1test.skip';
};
if (description[0] === 'o' && description[1] === ':') {
description = description.slice(2).replace(/^[ ]+|[ ]+$/g, '');
test = ' ß∂dNß0j1test.only';
};
let actual;
let expression;
let expected;
let errMessage;
let resultOfAssertion = "";
let assertion;
let startIndExpression;
let expressionEndPoint;
let argumentLength = 0;
let variables = "";
let finalCommentsTranspiled = "";
let endTest = "\t" +
"t.end();" +
"\n";
// Helper function that splits the ASSERTION: actual, expected, and expression
function assertions(string) {
let argumentSplit = string.split("|");
let threeArgExpression = [
"equal",
"notEqual",
"deepEqual",
"notDeepEqual",
"deepLooseEqual",
"notDeepLooseEqual",
"throws",
"doesNotThrow",
"same",
"notSame",
"strictSame",
"strictNotSame"
];
let twoArgExpression = ["ok", "notOk", "error"];
// Find the expression start index and end index
for (let three = 0; three < threeArgExpression.length; three++) {
if (argumentSplit[0].indexOf(threeArgExpression[three]) !== -1) {
startIndExpression = argumentSplit[0].indexOf(threeArgExpression[three]);
expressionEndPoint = startIndExpression + threeArgExpression[three].length;
argumentLength = 3;
}
}
for (let two = 0; two < twoArgExpression.length; two++) {
if (argumentSplit[0].indexOf(twoArgExpression[two]) !== -1) {
startIndExpression = argumentSplit[0].indexOf(twoArgExpression[two]);
expressionEndPoint = startIndExpression + twoArgExpression[two].length;
argumentLength = 2;
}
}
// If assertion contains an error message
if (argumentLength === 3) {
if (argumentSplit.length > 1) {
actual = argumentSplit[0].slice(0, startIndExpression).replace(/^[ ]+|[ ]+$/g, '');
expression = argumentSplit[0].slice(startIndExpression, expressionEndPoint).replace(/^[ ]+|[ ]+$/g, '');
expected = argumentSplit[0].slice(expressionEndPoint).replace(/\r\n/, "\n").split(/\n/)[0];
let message = argumentSplit[1].replace(/\s*[\r\n]+\s*/g, "\n").split(/\n/)[0].replace(/^[ ]+|[ ]+$/g, '');
errMessage = "'" + message + "'";
}
// If assertion does not contain an error message
if (argumentSplit.length < 2) {
actual = argumentSplit[0].slice(0, startIndExpression).replace(/^[ ]+|[ ]+$/g, '');
expression = argumentSplit[0].slice(startIndExpression, expressionEndPoint).replace(/^[ ]+|[ ]+$/g, '');
expected = argumentSplit[0].slice(expressionEndPoint).replace(/\r\n/, "\n").split(/\n/)[0];
errMessage = "'" +
"Error: " + description + "'";
}
resultOfAssertion = "\t" +
"t." + expression + "(" + actual + ", " + expected + ", " + errMessage + ");" + "\n";
return resultOfAssertion;
}
if (argumentLength === 2) {
if (argumentSplit.length > 1) {
expression = argumentSplit[0].slice(startIndExpression, expressionEndPoint).replace(/^[ ]+|[ ]+$/g, '');
expected = argumentSplit[0].slice(expressionEndPoint).replace(/\r\n/, "\n").split(/\n/)[0];
let message = argumentSplit[1].replace(/\s*[\r\n]+\s*/g, "\n").split(/\n/)[0].replace(/^[ ]+|[ ]+$/g, '');
errMessage = "'" + message + "'";
}
// If assertion does not contain an error message
if (argumentSplit.length < 2) {
expression = argumentSplit[0].slice(startIndExpression, expressionEndPoint).replace(/^[ ]+|[ ]+$/g, '');
expected = argumentSplit[0].slice(expressionEndPoint).replace(/\r\n/, "\n").split(/\n/)[0];
errMessage = "'" +
"Error: " + description + "'";
}
resultOfAssertion = "\t" +
"t." + expression + "(" + expected + ", " + errMessage + ");" + "\n";
return resultOfAssertion;
}
}
for (let index = 2; index < currcomments.length; index++) {
// if comments[index] is an assertion
if (currcomments[index].indexOf("a:") !== -1 && currcomments[index][0] === 'a' && currcomments[index][1] === ':') {
assertion = assertions(currcomments[index].slice(2).replace(/^[ ]+|[ ]+$/g, ''));
finalCommentsTranspiled += assertion;
}
// if currcomments[index] is a variable (optional)
if (currcomments[index][0] !== 'a' && currcomments[index][1] !== ':' && currcomments[index] !== undefined && /\S/.test(currcomments[index])) {
let splitVariable = currcomments[index].replace(/\r\n/, "\n").split(/\n/);
for (let eachVar = 0; eachVar < splitVariable.length; eachVar++) {
variables += "\t" + splitVariable[eachVar].replace(/^[ ]+|[ ]+$/g, '') + "\n";
}
finalCommentsTranspiled += variables;
variables = "";
}
// if curcomments[index] is ending in plan
if (currcomments[index].indexOf("p:") !== -1 && currcomments[index][0] === 'p' && currcomments[index][1] === ':') {
// let plan = "\t" + currcomments[index].slice(2).replace(/^[ ]+|[ ]+$/g, '');
let planInput = currcomments[index].slice(2).replace(/\s/g, '');
endTest = '';
finalCommentsTranspiled += `\tt.plan(${planInput});\n`
}
}
comments[i].value = test + "('" + description + "', function (t) {" + "\n" + finalCommentsTranspiled + endTest + "});";
}
}
}
}
}
};
}