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index.js
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index.js
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const pad = " ";
let suites = [];
let results = [];
let currentSuite = {
tests: []
};
let lastSuite = "";
let passes = 0;
let fails = 0;
exports = module.exports;
const _reset = () => {
suites = [];
results = [];
currentSuite = {
tests: []
};
lastSuite = "";
passes = 0;
fails = 0;
};
const _print = () => {
for (const result of results) {
if (result.suiteName !== lastSuite) {
console.log(`${result.suiteName}:`);
}
lastSuite = result.suiteName;
const testName = result.testName;
if (result.success) {
console.log(`${pad}\u001b[32;1m✓\u001b[0m - ${testName}`);
++passes;
continue;
}
switch (result.error) {
case "AssertionError": {
console.log(`${pad}\u001b[31;1m✕\u001b[0m - ${testName}: expected ${result.expected}, got ${result.actual}`);
++fails;
break;
}
default: {
console.log(`${pad}\u001b[31;1m✕\u001b[0m - ${testName}: an error occurred (${result.errorMsg})`);
++fails;
break;
}
}
}
console.log(`\n\u001b[32;1m${passes}\u001b[0m tests passing, \u001b[31;1m${fails}\u001b[0m tests failing\n`);
};
/**
* Creates a new test suite.
*/
const suite = (suiteName, callback) => {
currentSuite.suiteName = suiteName;
callback();
};
/**
* Adds a test to the suite.
*/
const add = (testName, test) => {
currentSuite.tests.push({
testName: testName,
test: test
});
};
/**
* Finish adding tests to the suite.
*/
const done = () => {
suites.push(currentSuite);
currentSuite = {
tests: []
};
};
/**
* Run all suites.
*/
const run = () => {
while (0 < suites.length) {
const suite = suites[0];
let i = 0;
while (i < suite.tests.length) {
const test = suite.tests[i].test;
const result = {
testName: suite.tests[i].testName,
suiteName: suite.suiteName
};
try {
test();
result.success = true;
} catch (error) {
if (error.name === "AssertionError") {
result.success = false;
result.error = "AssertionError";
result.errorMsg = error.message;
result.expected = error.expected;
result.actual = error.actual;
} else {
result.success = false;
result.error = error.name;
result.errorMsg = error.message;
}
}
results.push(result);
++i;
}
suites.splice(0, 1);
}
_print();
_reset();
};
exports.suite = suite;
exports.add = add;
exports.done = done;
exports.run = run;