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-rw-r--r--lib/test/unit/assertions.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/test/unit/assertions.rb b/lib/test/unit/assertions.rb
index 5987d1adc7..2e9fadfe57 100644
--- a/lib/test/unit/assertions.rb
+++ b/lib/test/unit/assertions.rb
@@ -69,6 +69,10 @@ module Test
elsif exp.is_a?(Time) && act.is_a?(Time)
exp_comment = " (nsec=#{exp.nsec})"
act_comment = " (nsec=#{act.nsec})"
+ elsif exp.class != act.class
+ # a subclass of Range, for example.
+ exp_comment = " (#{exp.class})"
+ act_comment = " (#{act.class})"
end
elsif !Encoding.compatible?(exp_str, act_str)
if exp.is_a?(String) && act.is_a?(String)