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-rw-r--r--spec/ruby/core/time/at_spec.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/spec/ruby/core/time/at_spec.rb b/spec/ruby/core/time/at_spec.rb
index 2cc46ab8c9..74b1962a95 100644
--- a/spec/ruby/core/time/at_spec.rb
+++ b/spec/ruby/core/time/at_spec.rb
@@ -266,5 +266,10 @@ describe "Time.at" do
time.zone.should == zone
time.to_i.should == @epoch_time
end
+
+ it "raises ArgumentError if format is invalid" do
+ -> { Time.at(@epoch_time, in: "+09:99") }.should raise_error(ArgumentError)
+ -> { Time.at(@epoch_time, in: "ABC") }.should raise_error(ArgumentError)
+ end
end
end