Tests: Convert TestQuotedPrintable decode test to use StringViews

Tests/LibIMAP/TestQuotedPrintable.cpp

@@ -10,29 +10,29 @@
 
 TEST_CASE(test_decode)
 {
-    auto decode_equal = [](char const* input, char const* expected) {
-        auto decoded = IMAP::decode_quoted_printable(StringView(input));
-        EXPECT(String::copy(decoded) == String(expected));
+    auto decode_equal = [](StringView input, StringView expected) {
+        auto decoded = IMAP::decode_quoted_printable(input);
+        EXPECT(decoded.bytes() == expected.bytes());
     };
 
-    auto decode_equal_byte_buffer = [](char const* input, char const* expected, size_t expected_length) {
-        auto decoded = IMAP::decode_quoted_printable(StringView(input));
-        EXPECT(decoded == ByteBuffer::copy(expected, expected_length).value());
+    auto decode_equal_byte_buffer = [](StringView input, StringView expected) {
+        auto decoded = IMAP::decode_quoted_printable(input);
+        EXPECT(decoded.bytes() == expected.bytes());
     };
 
-    decode_equal("hello world", "hello world");
-    decode_equal("=3D", "=");
-    decode_equal("hello=\r\n world", "hello world");
-    decode_equal("=68=65=6C=6C=6F=20=\r\n=77=6F=72=6C=64", "hello world");
+    decode_equal("hello world"sv, "hello world"sv);
+    decode_equal("=3D"sv, "="sv);
+    decode_equal("hello=\r\n world"sv, "hello world"sv);
+    decode_equal("=68=65=6C=6C=6F=20=\r\n=77=6F=72=6C=64"sv, "hello world"sv);
 
     // Doesn't mistake hex sequences without a preceding '=' as an escape sequence.
-    decode_equal("4A=4B=4C4D", "4AKL4D");
+    decode_equal("4A=4B=4C4D"sv, "4AKL4D"sv);
 
     // Allows lowercase escape sequences.
-    decode_equal("=4a=4b=4c=4d=4e=4f", "JKLMNO");
+    decode_equal("=4a=4b=4c=4d=4e=4f"sv, "JKLMNO"sv);
 
     // Bytes for U+1F41E LADY BEETLE
-    decode_equal_byte_buffer("=F0=9F=90=9E", "\xF0\x9F\x90\x9E", 4);
+    decode_equal_byte_buffer("=F0=9F=90=9E"sv, "\xF0\x9F\x90\x9E"sv);
 
     // Illegal characters. If these aren't escaped, they are simply ignored.
     // Illegal characters are: