Merge pull request #3375 from kiva/VUE-793

fix(cypress): remove old reports before cypress tests start VUE-793

test/e2e/plugins/merge-reports.js

@@ -1,28 +1,48 @@
 const path = require('path');
 const { mergeFiles } = require('junit-report-merger');
+const rimraf = require('rimraf');
 
 /* eslint-disable no-console */
 module.exports = on => {
-	// Merge together junit reports from all spec files into single junit report
-	on('after:run', results => {
-		if (results) {
-			console.log('Merging test result reports...');
+	const reportFileGlob = `${__dirname}/../results/*.xml`;
+	const combinedReportPath = path.join(__dirname, '..', 'results', 'combined.xml');
 
-			const outputFile = path.join(__dirname, '..', 'results', 'combined.xml');
-			const inputFiles = [`${__dirname}/../results/*.xml`];
-			const options = {
-				onFileMatched: ({ filePath }) => {
-					console.log(`Merging: ${filePath}`);
-				}
-			};
+	// Delete any existing reports before the run starts
+	on('before:run', () => {
+		console.log('Deleting old test result reports...');
 
-			mergeFiles(outputFile, inputFiles, options).then(() => {
-				console.log(`Merged report generated at ${outputFile}`);
-			}).catch(e => {
-				console.error(e);
+		return new Promise((resolve, reject) => {
+			rimraf(reportFileGlob, err => {
+				if (err) {
+					console.error('Error while deleting old test result reports:', err);
+					reject(err);
+				} else {
+					console.log('Deleted old test result reports');
+					resolve();
+				}
 			});
-		} else {
+		});
+	});
+
+	// Merge together junit reports from all spec files into single junit report
+	on('after:run', results => {
+		if (!results) {
 			console.log('Skipping report merging (no test results)');
+			return Promise.resolve();
 		}
+
+		console.log('Merging test result reports...');
+
+		const options = {
+			onFileMatched: ({ filePath }) => {
+				console.log(`Merging: ${filePath}`);
+			}
+		};
+
+		return mergeFiles(combinedReportPath, [reportFileGlob], options).then(() => {
+			console.log(`Merged report generated at ${combinedReportPath}`);
+		}).catch(e => {
+			console.error(e);
+		});
 	});
 };