Fail the action if no test results are processed

dist/index.js

@@ -305,6 +305,11 @@ class TestReporter {
         core.setOutput('time', time);
         if (this.failOnError && isFailed) {
             core.setFailed(`Failed test has been found and 'fail-on-error' option is set to ${this.failOnError}`);
+            return;
+        }
+        if (results.length === 0) {
+            core.setFailed(`No test results file has been processed`);
+            return;
         }
     }
     async createReport(parser, name, files) {