battery-device-bts/src/test/java/com/battery/device/bts/NewareBtsXmlCodecTest.java
@@ -238,6 +238,28 @@
    }
    @Test
    void leavesTheRestStepCarryOverValueOutOfTheSingleValuedColumns()
    {
        // 现场实测(C 那台):接口对搁置步给的是**跨步过渡值**,不是该步自身累计——
        // 这一步给 +0.290039804444444(等于上一步充电的容量),另一处还给过 −0.178807573333333。
        // 写成"搁置步容量 0.29 Ah"就是不成立的事实,所以搁置步的单项容量能量留空。
        String xml = "<bts><cmd>downloadStepLayer_resp</cmd>"
                + "<downloadStepLayer devtype=\"24\" devid=\"98\" subdevid=\"1\" chlid=\"1\" testid=\"2818576812\" />"
                + "<list count=\"1\"><data startseqid=\"1624\" endseqid=\"1624\" stepindex=\"9\" stepid=\"7\" cycleid=\"1\""
                + " steptype=\"rest\" steptime=\"59007400\" endatime=\"2026-08-29 08:43:06\" startvolt=\"1.2977\""
                + " endvolt=\"1.2977\" startcurr=\"0\" endcurr=\"0\" cap=\"0.290039804444444\""
                + " eng=\"0.468939271111111\" dcir=\"0\" /></list></bts>";
        StepRecord step = codec.parseStepLayer(xml, Instant.EPOCH).get(0);
        assertEquals("搁置", step.stepName());
        assertNull(step.capacityAh());
        assertNull(step.energyWh());
        // 原文仍留在明细里供核对,只是不当"该步自身累计"用。
        assertEquals(0.290039804444444, step.measurements().get("capacity").doubleValue(), 1e-15);
    }
    @Test
    void buildsTheStepLayerRequestWithoutTheOptionalElements()
    {
        String request = codec.downloadStepLayerRequest(CHANNEL);