From 7f4045fc69683d51c7c3fbd6497cfadba4966484 Mon Sep 17 00:00:00 2001
From: Dan DeBruler <ddebruler@gmail.com>
Date: Fri, 21 Jan 2022 10:53:37 -0500
Subject: Check string encoding for validity _and_ value

---
 test/tc_package.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test/tc_package.rb b/test/tc_package.rb
index 8dea7ccf..b98fa2f0 100644
--- a/test/tc_package.rb
+++ b/test/tc_package.rb
@@ -304,6 +304,7 @@ class TestPackage < Test::Unit::TestCase
     # in testing.
     assert(stream.size > 80000)
     # Stream (of zipped contents) should have appropriate default encoding
+    assert stream.string.valid_encoding?
     assert_equal(stream.external_encoding, Encoding::ASCII_8BIT)
     # Cached ids should be cleared
     assert(Axlsx::Relationship.ids_cache.empty?)
-- 
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