From 8a44fd062ab24155e9438f72de75cd5eb2e3af58 Mon Sep 17 00:00:00 2001
From: David Sterba <dsterba@suse.com>
Date: Fri, 11 Nov 2016 01:18:49 +0100
Subject: btrfs-progs: tests: add assertion helper

Helper to extend sanity checks in various functions.

Signed-off-by: David Sterba <dsterba@suse.com>
---
 tests/common | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'tests')

diff --git a/tests/common b/tests/common
index c20fec88..320b023f 100644
--- a/tests/common
+++ b/tests/common
@@ -3,6 +3,24 @@
 # Common routines for all tests
 #
 
+# assert that argument is not empty and is an existing path (file or directory)
+_assert_path()
+{
+	local path
+
+	path="$1"
+	if [ -z "$path" ]; then
+		echo "ASSERTION FAIL: $path is not valid"
+		exit 1
+	fi
+
+	if [ -f "$path" -o -d "$path" -o -b "$path" ]; then
+		return 0
+	fi
+	echo "ASSERTION FAIL: $path is not valid"
+	exit 1
+}
+
 _fail()
 {
 	echo "$*" | tee -a $RESULTS
-- 
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