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describe :kernel_sprintf_encoding, shared: true do
def format(*args)
@method.call(*args)
end
it "returns a String in the same encoding as the format String if compatible" do
string = "%s".force_encoding(Encoding::KOI8_U)
result = format(string, "dogs")
result.encoding.should equal(Encoding::KOI8_U)
end
it "returns a String in the argument's encoding if format encoding is more restrictive" do
string = "foo %s".force_encoding(Encoding::US_ASCII)
argument = "b\303\274r".force_encoding(Encoding::UTF_8)
result = format(string, argument)
result.encoding.should equal(Encoding::UTF_8)
end
it "raises Encoding::CompatibilityError if both encodings are ASCII compatible and there ano not ASCII characters" do
string = "Ä %s".encode('windows-1252')
argument = "Ђ".encode('windows-1251')
-> {
format(string, argument)
}.should raise_error(Encoding::CompatibilityError)
end
end
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