iHasLeadingPercent bool
		resultExpected     string
		matchExpected      bool
	}{
		{"abcd", "bcd", false, "", false},
		{"abcd", "bcd", true, "", true},
		{"abcd", "abcd", false, "", true},
		{"abcd", "abcd", true, "", true},
		{"abcd", "ab", false, "cd", true},
		{"abcd", "ab", true, "cd", true},
		{"abcd", "bc", false, "", false},
		{"abcd", "bc", true, "d", true},
	}

	for i, tc := range matcherCases {

    val multipart =
      """
      |--simple boundary
      |
      |abcd
      |--simple boundary
      |
      |efgh
      |--simple boundary--
      """.trimMargin()
        .replace("\n", "\r\n")
        .replace(Regex("(?m)abcd\r\n"), "abcd\n")

    val parts =
      MultipartReader(
        boundary = "simple boundary",

		err               error
	}{
		0: {
			desc:       "Success, no checksum verification provided.",
			src:        bytes.NewReader([]byte("abcd")),
			size:       4,
			actualSize: 4,
		},
		{
			desc:       "Failure md5 mismatch.",
			src:        bytes.NewReader([]byte("abcd")),
			size:       4,
			actualSize: 4,
			md5hex:     "d41d8cd98f00b204e9800998ecf8427f",
			err: BadDigest{

        assertEquals("abcd", normalizer.normalize("ａｂｃｄ", null));
        assertEquals("みかん", normalizer.normalize("みかん", null));
        assertEquals("みかん ﾘﾝｺﾞ", normalizer.normalize("みかん　リンゴ", null));
    }

    public void test_AnyLower() {
        ICUNormalizer normalizer = new ICUNormalizer("Any-Lower");
        assertEquals("abcd", normalizer.normalize("ABCD", null));
    }

			canonicalizedETag: "",
		},
		{
			etag:              "\"\"\"abc\"",
			canonicalizedETag: "abc",
		},
		{
			etag:              "abcd",
			canonicalizedETag: "abcd",
		},
		{
			etag:              "abcd\"\"",
			canonicalizedETag: "abcd",
		},
	}
	for _, test := range testCases {
		etag := canonicalizeETag(test.etag)
		if test.canonicalizedETag != etag {

	{"abcd:2345::/63", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff:ffff:fffe::"))}, nil},
	{"abcd:2345::/33", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff:8000::"))}, nil},
	{"abcd:2345::/32", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff::"))}, nil},

E	a([bc]+)(c*d)		abcd		(0,4)(1,3)(3,4)
E	a([bc]*)(c+d)		abcd		(0,4)(1,2)(2,4)
E	a[bcd]*dcdcde		adcdcde		(0,7)
E	(ab|a)b*c		abc		(0,3)(0,2)
E	((a)(b)c)(d)		abcd		(0,4)(0,3)(0,1)(1,2)(3,4)
BE	[A-Za-z_][A-Za-z0-9_]*	alpha		(0,5)
E	^a(bc+|b[eh])g|.h$	abh		(1,3)
E	(bc+d$|ef*g.|h?i(j|k))	effgz		(0,5)(0,5)
E	(bc+d$|ef*g.|h?i(j|k))	ij		(0,2)(0,2)(1,2)
E	(bc+d$|ef*g.|h?i(j|k))	reffgz		(1,6)(1,6)

	{`(.*)`, "abcd", build(1, 0, 4, 0, 4)},
	{`(..)(..)`, "abcd", build(1, 0, 4, 0, 2, 2, 4)},
	{`(([^xyz]*)(d))`, "abcd", build(1, 0, 4, 0, 4, 0, 3, 3, 4)},
	{`((a|b|c)*(d))`, "abcd", build(1, 0, 4, 0, 4, 2, 3, 3, 4)},
	{`(((a|b|c)*)(d))`, "abcd", build(1, 0, 4, 0, 4, 0, 3, 2, 3, 3, 4)},
	{`\a\f\n\r\t\v`, "\a\f\n\r\t\v", build(1, 0, 6)},
	{`[\a\f\n\r\t\v]+`, "\a\f\n\r\t\v", build(1, 0, 6)},

	{`a*(|(b))c*`, "aacc", build(1, 0, 4, 2, 2, -1, -1)},

		},
		// Test Case - 4.
		// Test case with AccessKey of length 2.
		{
			inputCredentialStr: generateCredentialStr(
				"^#",
				UTCNow().Format(yyyymmdd),
				"ABCD",
				"ABCD",
				"ABCD"),
			expectedCredentials: credentialHeader{},
			expectedErrCode:     ErrInvalidAccessKeyID,
		},
		// Test Case - 5.
		// Test case with invalid date format date.

func TestEvalSQLSubstring(t *testing.T) {
	evalCases := []struct {
		s           string
		startIdx    int
		length      int
		resExpected string
		errExpected error
	}{
		{"abcd", 1, 1, "a", nil},
		{"abcd", -1, 1, "a", nil},
		{"abcd", 999, 999, "", nil},
		{"", 999, 999, "", nil},
		{"测试abc", 1, 1, "测", nil},
		{"测试abc", 5, 5, "c", nil},
	}

	for i, tc := range evalCases {