52 lines
1.5 KiB
Swift
52 lines
1.5 KiB
Swift
import Testing
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import Foundation
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@testable import MIMEParser
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@Suite("RFC2047Decoder")
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struct RFC2047DecoderTests {
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@Test("plain ASCII filename passes through unchanged")
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func plainAscii() {
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let result = RFC2047Decoder.decode("report.pdf")
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#expect(result == "report.pdf")
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}
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@Test("base64 encoded UTF-8 filename decoded correctly")
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func base64Utf8() {
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// "Bericht.pdf" in base64
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let encoded = "=?utf-8?B?QmVyaWNodC5wZGY=?="
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let result = RFC2047Decoder.decode(encoded)
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#expect(result == "Bericht.pdf")
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}
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@Test("quoted-printable encoded UTF-8 filename decoded correctly")
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func quotedPrintableUtf8() {
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// "Grüße.txt" — ü = =C3=BC, ß = =C3=9F
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let encoded = "=?utf-8?Q?Gr=C3=BC=C3=9Fe.txt?="
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let result = RFC2047Decoder.decode(encoded)
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#expect(result == "Grüße.txt")
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}
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@Test("multiple encoded words concatenated")
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func multipleEncodedWords() {
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let encoded = "=?utf-8?B?SGVsbG8=?= =?utf-8?B?V29ybGQ=?="
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let result = RFC2047Decoder.decode(encoded)
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#expect(result == "HelloWorld")
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}
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@Test("ISO-8859-1 encoded filename decoded correctly")
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func iso88591() {
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// "café" — é = 0xE9 in ISO-8859-1, base64 of "café" in ISO-8859-1 is "Y2Fm6Q=="
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let encoded = "=?iso-8859-1?B?Y2Fm6Q==?="
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let result = RFC2047Decoder.decode(encoded)
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#expect(result == "café")
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}
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@Test("underscores in Q-encoding replaced with spaces")
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func qEncodingUnderscores() {
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let encoded = "=?utf-8?Q?my_file_name.pdf?="
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let result = RFC2047Decoder.decode(encoded)
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#expect(result == "my file name.pdf")
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}
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}
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