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Add specs for String#char_bytesize_at (#11872)
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@straight-shoota
straight-shoota authored Jun 28, 2022
1 parent 76234d1 commit 92f9e23
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45 changes: 45 additions & 0 deletions spec/std/string_spec.cr
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Original file line number Diff line number Diff line change
Expand Up @@ -2934,3 +2934,48 @@ describe "String" do
end
end
end

class String
describe String do
it ".char_bytesize_at" do
String.char_bytesize_at(Bytes[0x00, 0].to_unsafe).should eq 1
String.char_bytesize_at(Bytes[0x7F, 0].to_unsafe).should eq 1
String.char_bytesize_at(Bytes[0x80, 0].to_unsafe).should eq 1 # malformed
String.char_bytesize_at(Bytes[0xBF, 0].to_unsafe).should eq 1 # malformed
String.char_bytesize_at(Bytes[0xC2, 0].to_unsafe).should eq 1 # malformed
String.char_bytesize_at(Bytes[0xC3, 0].to_unsafe).should eq 1 # malformed

String.char_bytesize_at(Bytes[0xC2, 0x7F, 0].to_unsafe).should eq 1 # malformed
String.char_bytesize_at(Bytes[0xC2, 0x80, 0].to_unsafe).should eq 2
String.char_bytesize_at(Bytes[0xDF, 0xBF, 0].to_unsafe).should eq 2
String.char_bytesize_at(Bytes[0xDF, 0xC0, 0].to_unsafe).should eq 1 # malformed

String.char_bytesize_at(Bytes[0xE0, 0xA0, 0x7F, 0].to_unsafe).should eq 1 # malformed
String.char_bytesize_at(Bytes[0xE0, 0x9F, 0x8F, 0].to_unsafe).should eq 1 # malformed
String.char_bytesize_at(Bytes[0xE0, 0xA0, 0x80, 0].to_unsafe).should eq 3
String.char_bytesize_at(Bytes[0xED, 0x9F, 0xBF, 0].to_unsafe).should eq 3
String.char_bytesize_at(Bytes[0xED, 0x9F, 0xC0, 0].to_unsafe).should eq 1 # surrogate
String.char_bytesize_at(Bytes[0xED, 0xBF, 0xBF, 0].to_unsafe).should eq 1 # surrogate
String.char_bytesize_at(Bytes[0xEE, 0x80, 0x80, 0].to_unsafe).should eq 3
String.char_bytesize_at(Bytes[0xEF, 0xBF, 0xBD, 0].to_unsafe).should eq 3
String.char_bytesize_at(Bytes[0xEF, 0xBF, 0xBF, 0].to_unsafe).should eq 3
String.char_bytesize_at(Bytes[0xEF, 0xBF, 0xC0, 0].to_unsafe).should eq 1 # malformed
String.char_bytesize_at(Bytes[0xEF, 0xC0, 0xBF, 0].to_unsafe).should eq 1 # malformed

String.char_bytesize_at(Bytes[0xF0, 0x90, 0x80, 0x7F, 0].to_unsafe).should eq 1 # malformed
String.char_bytesize_at(Bytes[0xF0, 0x90, 0x7F, 0x80, 0].to_unsafe).should eq 1 # malformed
String.char_bytesize_at(Bytes[0xF0, 0x8F, 0x80, 0x80, 0].to_unsafe).should eq 1 # malformed
String.char_bytesize_at(Bytes[0xF0, 0x90, 0x80, 0x80, 0].to_unsafe).should eq 4
String.char_bytesize_at(Bytes[0xF0, 0x9F, 0xBF, 0xBF, 0].to_unsafe).should eq 4
String.char_bytesize_at(Bytes[0xF3, 0x90, 0x80, 0x80, 0].to_unsafe).should eq 4
String.char_bytesize_at(Bytes[0xF4, 0x8F, 0xBD, 0xBF, 0].to_unsafe).should eq 4
String.char_bytesize_at(Bytes[0xF4, 0x8F, 0xBF, 0xBF, 0].to_unsafe).should eq 4
String.char_bytesize_at(Bytes[0xF4, 0x8F, 0xBF, 0xC0, 0].to_unsafe).should eq 1 # malformed
String.char_bytesize_at(Bytes[0xF4, 0x8F, 0xC0, 0xBF, 0].to_unsafe).should eq 1 # malformed
String.char_bytesize_at(Bytes[0xF4, 0x90, 0xBF, 0xBF, 0].to_unsafe).should eq 1 # malformed

String.char_bytesize_at(Bytes[0xF5, 0].to_unsafe).should eq 1 # out of codepoint range
String.char_bytesize_at(Bytes[0xFF, 0].to_unsafe).should eq 1 # out of codepoint range
end
end
end

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