From 77bcfb91af5cd2d2e5730604847533b402c043f0 Mon Sep 17 00:00:00 2001
From: Lucas Bajolet <lucas.bajolet@hashicorp.com>
Date: Thu, 16 May 2024 14:25:36 +0000
Subject: [PATCH] backport of commit 6f299f5228ca4714a993d72500e02f87f90e148a

---
 packer_test/gadgets_test.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/packer_test/gadgets_test.go b/packer_test/gadgets_test.go
index 903cd3de5..3ddd29e55 100644
--- a/packer_test/gadgets_test.go
+++ b/packer_test/gadgets_test.go
@@ -158,3 +158,13 @@ func (c CustomCheck) Check(stdout, stderr string, err error) error {
 func (c CustomCheck) Name() string {
 	return fmt.Sprintf("custom check - %s", c.name)
 }
+
+// LineCountCheck builds a pipe checker to count the number of lines on stdout by default
+//
+// To change the stream(s) on which to perform the check, you can call SetStream on the
+// returned pipe checker.
+func LineCountCheck(lines int) *PipeChecker {
+	return MkPipeCheck(fmt.Sprintf("line count (%d)", lines), LineCount()).
+		SetTester(IntCompare(eq, lines)).
+		SetStream(OnlyStdout)
+}