@ValueSource(strings = { "text/unknown", "application/x-unknown", "custom/type", "" })
        void testVariousDefaultValues(String defaultValue) throws IOException {
            assertEquals(defaultValue, mimeMap.getMimeType("notinmap", defaultValue));
        }
    }

    @Nested
    @DisplayName("Edge cases and special scenarios")
    class EdgeCases {

        @Test

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