From 86794e96eea9852ad78c7c543b97c47b817b8398 Mon Sep 17 00:00:00 2001
From: Abhinav Gupta <mail@abhinavg.net>
Date: Thu, 10 Nov 2022 19:05:20 -0800
Subject: [PATCH] DoTestCaseFile: Don't panic

Instead of panicking, report the error in the form,

    $file: $msg

So an error might look like,

    foo.txt: line 12: invalid case No: [..]

And then kill the test with FailNow.
This is the same as calling `t.Fatalf(...)`.
---
 testutil/testutil.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/testutil/testutil.go b/testutil/testutil.go
index 4e529f3..3404a5a 100644
--- a/testutil/testutil.go
+++ b/testutil/testutil.go
@@ -236,7 +236,8 @@ func ParseTestCaseFile(filename string) ([]MarkdownTestCase, error) {
 func DoTestCaseFile(m goldmark.Markdown, filename string, t TestingT, no ...int) {
 	allCases, err := ParseTestCaseFile(filename)
 	if err != nil {
-		panic(err)
+		t.Errorf("%v: %v", filename, err)
+		t.FailNow()
 	}
 
 	cases := allCases[:0]