{string([]byte{0xff, 0xfe, 0xfd}), true},
		{`foo\bar`, true},
		{"Hello/世界", false},
	}

	for i, testCase := range testCases {
		err := ValidateFilterRuleValue(testCase.value)
		expectErr := (err != nil)

		if expectErr != testCase.expectErr {
			t.Fatalf("test %v: error: expected: %v, got: %v", i+1, testCase.expectErr, expectErr)
		}
	}
}