Use supertap to generate TAP output

Author: Vadim Demedes

lib/reporters/tap.js

@@ -1,8 +1,6 @@
 'use strict';
-const format = require('util').format;
-const indentString = require('indent-string');
+const supertap = require('supertap');
 const stripAnsi = require('strip-ansi');
-const yaml = require('js-yaml');
 
 function dumpError(error, includeMessage) {
 	const obj = Object.assign({}, error.object);
@@ -32,7 +30,7 @@ function dumpError(error, includeMessage) {
 		obj.at = error.stack.split('\n')[0];
 	}
 
-	return `  ---\n${indentString(yaml.safeDump(obj).trim(), 4)}\n  ...`;
+	return obj;
 }
 
 class TapReporter {
@@ -41,79 +39,42 @@ class TapReporter {
 	}
 
 	start() {
-		return 'TAP version 13';
+		return supertap.start();
 	}
 
 	test(test) {
-		const output = [];
-
-		let directive = '';
-		const passed = test.todo ? 'not ok' : 'ok';
-
-		if (test.todo) {
-			directive = '# TODO';
-		} else if (test.skip) {
-			directive = '# SKIP';
-		}
-
-		const title = stripAnsi(test.title);
-
-		const appendLogs = () => {
-			if (test.logs) {
-				test.logs.forEach(log => {
-					const logLines = indentString(log, 4);
-					const logLinesWithLeadingFigure = logLines.replace(
-						/^ {4}/,
-						'  * '
-					);
-
-					output.push(logLinesWithLeadingFigure);
-				});
-			}
-		};
-
-		output.push(`# ${title}`);
-
-		if (test.error) {
-			output.push(format('not ok %d - %s', ++this.i, title));
-			appendLogs();
-			output.push(dumpError(test.error, true));
-		} else {
-			output.push(format('%s %d - %s %s', passed, ++this.i, title, directive).trim());
-			appendLogs();
-		}
-
-		return output.join('\n');
+		return supertap.test(test.title, {
+			passed: !test.error,
+			index: ++this.i,
+			todo: test.todo,
+			skip: test.skip,
+			comment: test.logs,
+			error: test.error ? dumpError(test.error, true) : null
+		});
 	}
 
 	unhandledError(err) {
-		const output = [
-			`# ${err.message}`,
-			format('not ok %d - %s', ++this.i, err.message)
-		];
+		let error;
+
 		// AvaErrors don't have stack traces
 		if (err.type !== 'exception' || err.name !== 'AvaError') {
-			output.push(dumpError(err, false));
+			error = dumpError(err, false);
 		}
 
-		return output.join('\n');
+		return supertap.test(err.message, {
+			passed: false,
+			index: ++this.i,
+			error
+		});
 	}
 
 	finish(runStatus) {
-		const output = [
-			'',
-			'1..' + (runStatus.passCount + runStatus.failCount + runStatus.skipCount),
-			'# tests ' + (runStatus.passCount + runStatus.failCount + runStatus.skipCount),
-			'# pass ' + runStatus.passCount
-		];
-
-		if (runStatus.skipCount > 0) {
-			output.push(`# skip ${runStatus.skipCount}`);
-		}
-
-		output.push('# fail ' + (runStatus.failCount + runStatus.rejectionCount + runStatus.exceptionCount), '');
-
-		return output.join('\n');
+		return supertap.finish({
+			passed: runStatus.passCount,
+			failed: runStatus.failCount,
+			skipped: runStatus.skipCount,
+			crashed: runStatus.rejectionCount + runStatus.exceptionCount
+		});
 	}
 
 	write(str) {

package-lock.json

@@ -111,7 +111,6 @@
 		"is-obj": "^1.0.0",
 		"is-observable": "^1.0.0",
 		"is-promise": "^2.1.0",
-		"js-yaml": "^3.8.2",
 		"last-line-stream": "^1.0.0",
 		"lodash.clonedeepwith": "^4.5.0",
 		"lodash.debounce": "^4.0.3",
@@ -139,6 +138,7 @@
 		"stack-utils": "^1.0.1",
 		"strip-ansi": "^4.0.0",
 		"strip-bom-buf": "^1.0.0",
+		"supertap": "^1.0.0",
 		"supports-color": "^5.0.0",
 		"time-require": "^0.1.2",
 		"trim-off-newlines": "^1.0.1",