[Tests] stackTrace: use the common getDiag utility

Author: ljharb

test/common.js

@@ -3,7 +3,7 @@
 var path = require('path');
 var yaml = require('js-yaml');
 
-module.exports.getDiag = function (body) {
+module.exports.getDiag = function (body, includeStack) {
 	var yamlStart = body.indexOf('  ---');
 	var yamlEnd = body.indexOf('  ...\n');
 	var diag = body.slice(yamlStart, yamlEnd).split('\n').map(function (line) {
@@ -13,7 +13,9 @@ module.exports.getDiag = function (body) {
 	// The stack trace and at variable will vary depending on where the code
 	// is run, so just strip it out.
 	var withStack = yaml.safeLoad(diag);
-	delete withStack.stack;
+	if (!includeStack) {
+		delete withStack.stack;
+	}
 	delete withStack.at;
 	return withStack;
 };

test/stackTrace.js

@@ -4,7 +4,9 @@ var tape = require('../');
 var tap = require('tap');
 var concat = require('concat-stream');
 var tapParser = require('tap-parser');
-var yaml = require('js-yaml');
+var common = require('./common');
+
+var getDiag = common.getDiag;
 
 tap.test('preserves stack trace with newlines', function (tt) {
 	tt.plan(3);
@@ -34,26 +36,26 @@ tap.test('preserves stack trace with newlines', function (tt) {
 		tt.equal(
 			strippedBody,
 			'TAP version 13\n'
-            + '# multiline stack trace\n'
-            + 'not ok 1 Error: Preserve stack\n'
-            + '  ---\n'
-            + '    operator: error\n'
-            + '    expected: |-\n'
-            + '      undefined\n'
-            + '    actual: |-\n'
-            + '      [Error: Preserve stack]\n'
-            + '    stack: |-\n'
-            + '      foo\n'
-            + '        bar\n'
-            + '  ...\n'
-            + '\n'
-            + '1..1\n'
-            + '# tests 1\n'
-            + '# pass  0\n'
-            + '# fail  1\n'
+			+ '# multiline stack trace\n'
+			+ 'not ok 1 Error: Preserve stack\n'
+			+ '  ---\n'
+			+ '    operator: error\n'
+			+ '    expected: |-\n'
+			+ '      undefined\n'
+			+ '    actual: |-\n'
+			+ '      [Error: Preserve stack]\n'
+			+ '    stack: |-\n'
+			+ '      foo\n'
+			+ '        bar\n'
+			+ '  ...\n'
+			+ '\n'
+			+ '1..1\n'
+			+ '# tests 1\n'
+			+ '# pass  0\n'
+			+ '# fail  1\n'
 		);
 
-		tt.deepEqual(getDiag(strippedBody), {
+		tt.deepEqual(getDiag(strippedBody, true), {
 			stack: stackTrace,
 			operator: 'error',
 			expected: 'undefined',
@@ -198,25 +200,25 @@ tap.test('preserves stack trace for failed assertions', function (tt) {
 		tt.equal(
 			strippedBody,
 			'TAP version 13\n'
-            + '# t.equal stack trace\n'
-            + 'not ok 1 true should be false\n'
-            + '  ---\n'
-            + '    operator: equal\n'
-            + '    expected: false\n'
-            + '    actual:   true\n'
-            + '    stack: |-\n'
-            + '      '
-            + stack.replace(/\n/g, '\n      ')
-            + '\n'
-            + '  ...\n'
-            + '\n'
-            + '1..1\n'
-            + '# tests 1\n'
-            + '# pass  0\n'
-            + '# fail  1\n'
+			+ '# t.equal stack trace\n'
+			+ 'not ok 1 true should be false\n'
+			+ '  ---\n'
+			+ '    operator: equal\n'
+			+ '    expected: false\n'
+			+ '    actual:   true\n'
+			+ '    stack: |-\n'
+			+ '      '
+			+ stack.replace(/\n/g, '\n      ')
+			+ '\n'
+			+ '  ...\n'
+			+ '\n'
+			+ '1..1\n'
+			+ '# tests 1\n'
+			+ '# pass  0\n'
+			+ '# fail  1\n'
 		);
 
-		tt.deepEqual(getDiag(strippedBody), {
+		tt.deepEqual(getDiag(strippedBody, true), {
 			stack: stack,
 			operator: 'equal',
 			expected: false,
@@ -281,7 +283,7 @@ tap.test('preserves stack trace for failed assertions where actual===falsy', fun
             + '# fail  1\n'
 		);
 
-		tt.deepEqual(getDiag(strippedBody), {
+		tt.deepEqual(getDiag(strippedBody, true), {
 			stack: stack,
 			operator: 'equal',
 			expected: true,
@@ -295,20 +297,6 @@ tap.test('preserves stack trace for failed assertions where actual===falsy', fun
 	});
 });
 
-function getDiag(body) {
-	var yamlStart = body.indexOf('  ---');
-	var yamlEnd = body.indexOf('  ...\n');
-	var diag = body.slice(yamlStart, yamlEnd).split('\n').map(function (line) {
-		return line.slice(2);
-	}).join('\n');
-
-	// Get rid of 'at' variable (which has a line number / path of its own that's
-	// difficult to check).
-	var withStack = yaml.safeLoad(diag);
-	delete withStack.at;
-	return withStack;
-}
-
 function stripAt(body) {
 	return body.replace(/^\s*at:\s+Test.*$\n/m, '');
 }