Tests: Confirm that NODE_OPTIONS --enable-source-maps works

Ref #590.

test/cli/fixtures/expected/tap-outputs.js

@@ -164,6 +164,43 @@ not ok 1 global failure
 # skip 0
 # todo 0
 # fail 1
+`,
+
+  "qunit sourcemap/source.js":
+`TAP version 13
+ok 1 Example > good
+not ok 2 Example > bad
+  ---
+  message: "failed"
+  severity: failed
+  actual: false
+  expected: true
+  stack:     at .* \\(.*source.js:7:14\\)
+  ...
+1..2
+# pass 1
+# skip 0
+# todo 0
+# fail 1
+`,
+
+  "NODE_OPTIONS='--enable-source-maps' qunit sourcemap/source.min.js":
+`TAP version 13
+ok 1 Example > good
+not ok 2 Example > bad
+  ---
+  message: "failed"
+  severity: failed
+  actual: false
+  expected: true
+  stack:     at .* \\(.*source.min.js:1:.*\\)
+        -> .*source.js:7:10
+  ...
+1..2
+# pass 1
+# skip 0
+# todo 0
+# fail 1
 `,
 
 	"qunit timeout":

test/cli/fixtures/sourcemap/source.js

@@ -0,0 +1,9 @@
+QUnit.module( "Example", function() {
+	QUnit.test( "good", function( assert ) {
+		assert.true( true );
+	} );
+
+	QUnit.test( "bad", function( assert ) {
+		assert.true( false );
+	} );
+} );

test/cli/helpers/execute.js

@@ -10,7 +10,7 @@ module.exports = function execute( command, execaOptions ) {
 	const cwd = process.cwd();
 	process.chdir( path.join( __dirname, "..", "fixtures" ) );
 
-	command = command.replace( /^qunit\b/, "../../../bin/qunit.js" );
+	command = command.replace( /(^| )qunit\b/, "$1../../../bin/qunit.js" );
 	const execution = exec( command, execaOptions );
 
 	process.chdir( cwd );

test/cli/main.js

@@ -135,6 +135,37 @@ QUnit.module( "CLI Main", function() {
 		}
 	} );
 
+	// https://nodejs.org/dist/v12.12.0/docs/api/cli.html#cli_enable_source_maps
+	if ( semver.gte( process.versions.node, "14.0.0" ) ) {
+
+		QUnit.test( "normal trace with native source map", async function( assert ) {
+			const command = "qunit sourcemap/source.js";
+			try {
+				await execute( command );
+			} catch ( e ) {
+				assert.equal( e.code, 1 );
+				assert.equal( e.stderr, "" );
+				const re = new RegExp( expectedOutput[ command ] );
+				assert.equal( re.test( e.stdout ), true );
+			}
+		} );
+
+		QUnit.test( "mapped trace with native source map", async function( assert ) {
+			const command = "NODE_OPTIONS='--enable-source-maps' qunit sourcemap/source.min.js";
+			try {
+				await execute( command );
+			} catch ( e ) {
+				assert.equal( e.code, 1 );
+				assert.equal( e.stderr, "" );
+				const re = new RegExp( expectedOutput[ command ] );
+				assert.equal( re.test( e.stdout ), true );
+				if ( !re.test( e.stdout ) ) {
+					assert.equal( e.stdout, expectedOutput[ command ] );
+				}
+			}
+		} );
+	}
+
 	QUnit.test( "timeouts correctly recover", async function( assert ) {
 		const command = "qunit timeout";
 		try {