(some fragment).java

...
    @Test
    void shouldCompressAndDecompress() throws IOException {
        whenCompressingData();
        thenDataIsCompressed();
        thenCompressedDataShouldBeCorrectlyDecompressed();
        andTheCompressionRatioIsPrintedOut();
    }

    private void andTheCompressionRatioIsPrintedOut() {
        long inputSize = TEST_DATA.getBytes().length;
        System.out.printf("Input size: %d - Compressed size: %d - Compression ratio: %5.2f%%%n",
                inputSize,
                compressedStream.size(),
                (inputSize-compressedStream.size())*100.0/inputSize);
    }
...