test: test cover cases when trace is empty

telenord · MylesBorins · commit 0a068db45078 · 2019-12-17T17:06:50.000-05:00
cover prepare_stack_trace in case when trace is empty PR-URL: #30311 Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
diff --git a/test/fixtures/source-map/emptyStackError.js b/test/fixtures/source-map/emptyStackError.js
@@ -0,0 +1,6 @@
+"use strict";
+
+Error.stackTraceLimit = 0;
+throw new RangeError('emptyStackError');
+
+
diff --git a/test/parallel/test-source-map.js b/test/parallel/test-source-map.js
@@ -255,6 +255,18 @@ function nextdir() {
   }
 }
 
+// trace.length === 0 .
+{
+  const output = spawnSync(process.execPath, [
+    '--enable-source-maps',
+    require.resolve('../fixtures/source-map/emptyStackError.js')
+  ]);
+
+  assert.ok(
+    output.stderr.toString().match('emptyStackError')
+  );
+}
+
 function getSourceMapFromCache(fixtureFile, coverageDirectory) {
   const jsonFiles = fs.readdirSync(coverageDirectory);
   for (const jsonFile of jsonFiles) {
