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const Snapshot = require('./lib.js');
/**
* @fileoverview
* CLI for testing and generating snapshot tests.
*/
/* eslint-disable no-console */
const RESET = `\u001b[0m`;
const BOLD = '\u001b[1m';
const RED = '\u001b[31m';
const YELLOW = `\u001b[33m`;
const BLUE = `\u001b[34m`;
const GREEN = '\u001b[32m';
const isUpdatingSnapshots = process.argv.includes('--update');
const runSnapshotTest = async testCase => {
const prefix = `### ${testCase.id}: `;
try {
const actualSnapshot = await Snapshot.generateActualSnapshot(testCase);
const expectedSnapshot = Snapshot.getExpectedSnapshot(testCase);
const result = Snapshot.compareSnapshots(expectedSnapshot, actualSnapshot);
if (isUpdatingSnapshots) {
if (result === 'VALID') {
console.log(`${BOLD}${GREEN}${prefix}already matches${RESET}`);
return 'VALID';
}
console.log(`${BOLD}${BLUE}${prefix}updating${RESET}`);
Snapshot.saveSnapshot(testCase, actualSnapshot);
return 'UPDATED';
}
if (result === 'VALID') {
console.log(`${BOLD}${GREEN}${prefix}matches${RESET}`);
return 'VALID';
}
if (result === 'MISSING_SNAPSHOT') {
console.log(`${BOLD}${YELLOW}${prefix}missing snapshot${RESET}`);
return 'MISSING_SNAPSHOT';
}
if (result === 'INPUT_MODIFIED') {
console.log(`${BOLD}${YELLOW}${prefix}INPUT WAS MODIFIED${RESET}`);
return 'INPUT_MODIFIED';
}
console.log(`${BOLD}${RED}${prefix}DOES NOT MATCH${RESET}`);
console.log(`${RED}EXPECTED:\n${expectedSnapshot}${RESET}`);
console.log(`${BLUE}GOT:\n${actualSnapshot}${RESET}`);
} catch (e) {
console.log(`${BOLD}${RED}${prefix}ERROR${RESET}`);
console.log(`${RED}${e}${RESET}`);
}
console.log('');
return 'INVALID';
};
const run = async () => {
console.log(`Running ${Snapshot.tests.length} snapshot tests.`);
const fileToResult = {};
for (const testCase of Snapshot.tests) {
fileToResult[testCase.id] = await runSnapshotTest(testCase);
}
const getTestsByResult = r => Object.entries(fileToResult)
.filter(i => i[1] === r)
.map(i => i[0]);
const passed = getTestsByResult('VALID');
const failed = getTestsByResult('INVALID');
const missing = getTestsByResult('MISSING_SNAPSHOT');
const updated = getTestsByResult('UPDATED');
const modified = getTestsByResult('INPUT_MODIFIED');
console.log('');
console.log(`${BOLD}=== SUMMARY ===${RESET}`);
if (passed.length) {
// Listing which ones were passed is unnecessary noise
console.log(`${BOLD}${GREEN}PASSED ${passed.length}${RESET}`);
}
if (failed.length) {
console.log(`${BOLD}${RED}FAILED ${failed.length} ${RESET}${failed.join(', ')}`);
}
if (missing.length) {
console.log(`${BOLD}${YELLOW}MISSING ${missing.length} ${RESET}${missing.join(', ')}`);
}
if (modified.length) {
console.log(`${BOLD}${YELLOW}MODIFIED ${modified.length} ${RESET}${modified.join(', ')}`);
}
if (updated.length) {
console.log(`${BOLD}${BLUE}UPDATED ${updated.length} ${RESET}${updated.join(', ')}`);
}
if (failed.length || missing.length || modified.length) {
console.log('');
if (modified.length) {
console.log(`${missing.length} of the test projects have been modified, so this error is expected.`);
}
if (missing.length) {
console.log(`${missing.length} of the test projects are missing snapshot, so this error is expected.`);
}
if (failed.length) {
console.log(`If the compiler's behavior has changed, this failure is expected.`);
}
console.log(`Update snapshots with: ${BOLD}node test/snapshot --update${RESET}`);
console.log(`Review the diff in version control, then commit the updated snapshot files.`);
}
if (updated.length) {
console.log('');
console.log('Some snapshots have been updated. Please review the diff before committing.');
}
return passed.length + updated.length === Snapshot.tests.length;
};
run()
.then(success => {
process.exit(success ? 0 : 1);
})
.catch(err => {
console.error(err);
process.exit(1);
});
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