public void testAtMostOneSeparator() {
    BaseEncoding separated = base64().withSeparator("\n", 3);
    assertThrows(UnsupportedOperationException.class, () -> separated.withSeparator("$", 4));
  }

  public void testBase64() {
    // The following test vectors are specified in RFC 4648 itself
    testEncodingWithSeparators(base64(), "", "");
    testEncodingWithSeparators(base64(), "f", "Zg==");

		18: {
			IsTruncated: true,
			Objects: []ObjectInfo{
				{Name: "newzen/zen/recurse/again/again/again/pics"},
			},
		},
		// ListObjectsResult-19.
		// Marker = "obj0" & maxKeys = 1 in the testCase, (testCase44).
		// Output truncated to 1 value.
		19: {
			IsTruncated: true,
			Objects: []ObjectInfo{
				{Name: "obj1"},
			},
		},
		// ListObjectsResult-20.