@ParameterizedTest
    @EnumSource(Mode.class)
    void shouldNormalizeEqualSign(Mode mode) {
        assertAccepted(parse(mode, "/=?a=b=1"), "/=", "a=b=1");
        // '%3D' in a query string should never be decoded into '='.
        assertAccepted(parse(mode, "/%3D?a%3db=1"), "/=", "a%3Db=1");
    }
{@link RequestTarget} treats the first `=` in a query parameter as `/` internally to simplify
the detection the logic. This test makes sure the `=` appeared later is not treated as `/`.
core/src/test/java/com/linecorp/armeria/internal/common/DefaultRequestTargetTest.java