feat(chart): support configurable x-axis labels

src/demo/xAxisLabelControls.test.ts

@@ -0,0 +1,86 @@
+import { flushPromises, mount } from '@vue/test-utils'
+import { InputNumber, Select } from 'ant-design-vue'
+import { describe, expect, it } from 'vitest'
+
+import App from '../App.vue'
+import { WaveformChart } from '../components'
+import { formatDemoTimestamp } from './useDemoXAxisLabelControls'
+
+describe('X-axis label demo controls', () => {
+  it('formats timestamps in fixed UTC and China-standard-time formats', () => {
+    expect(formatDemoTimestamp(0, 'UTC', false)).toBe('1970-01-01 00:00:00')
+    expect(formatDemoTimestamp(123, 'UTC', true)).toBe('1970-01-01 00:00:00.123')
+    expect(formatDemoTimestamp(0, 'Asia/Shanghai', false)).toBe('1970-01-01 08:00:00')
+    expect(formatDemoTimestamp(Number.NaN, 'UTC', false)).toBe('NaN')
+  })
+
+  it('configures numeric and timestamp labels from the sidebar', async () => {
+    const wrapper = mount(App)
+    await flushPromises()
+    const chart = wrapper.getComponent(WaveformChart)
+
+    expect(chart.props('axes')).toEqual({
+      x: { lineVisible: false },
+      y: { lineVisible: false },
+    })
+    expect(wrapper.find('[aria-label="自定义 X 轴 Label"]').exists()).toBe(true)
+    expect(wrapper.find('[aria-label="X 轴 Label 运算倍率"]').exists()).toBe(false)
+    expect(wrapper.find('[aria-label="X 轴 Label 小数位数"]').exists()).toBe(false)
+    expect(wrapper.find('[aria-label="X 轴 Label 格式类型"]').exists()).toBe(false)
+
+    await wrapper.get('[aria-label="自定义 X 轴 Label"]').trigger('click')
+    await flushPromises()
+    const inputNumbers = wrapper.findAllComponents(InputNumber)
+    const multiplierInput = inputNumbers.find((input) =>
+      input.find('[aria-label="X 轴 Label 运算倍率"]').exists(),
+    )
+    const fractionDigitsInput = inputNumbers.find((input) =>
+      input.find('[aria-label="X 轴 Label 小数位数"]').exists(),
+    )
+    expect(multiplierInput).toBeDefined()
+    expect(fractionDigitsInput).toBeDefined()
+    expect(multiplierInput?.props('value')).toBe(1)
+    expect(fractionDigitsInput?.props('value')).toBe(3)
+    expect(wrapper.get('.waveform-chart__axis-endpoint--start').text()).toMatch(/\.000$/)
+
+    multiplierInput?.vm.$emit('update:value', 2)
+    fractionDigitsInput?.vm.$emit('update:value', 2)
+    await flushPromises()
+    const formatter = chart.props('axes')?.x?.labelFormatter
+    expect(formatter).toBeTypeOf('function')
+    expect(formatter?.(1.234, {} as never)).toBe('2.47')
+    expect(wrapper.get('.waveform-chart__axis-endpoint--start').text()).toMatch(/\.00$/)
+
+    const formatSelect = wrapper
+      .findAllComponents(Select)
+      .find((select) => select.find('[aria-label="X 轴 Label 格式类型"]').exists())
+    expect(formatSelect?.props('value')).toBe('number')
+    formatSelect?.vm.$emit('update:value', 'datetime')
+    await flushPromises()
+    expect(wrapper.find('[aria-label="X 轴 Label 运算倍率"]').exists()).toBe(false)
+    expect(wrapper.find('[aria-label="X 轴 Label 小数位数"]').exists()).toBe(false)
+    expect(wrapper.find('[aria-label="X 轴 Label 时区"]').exists()).toBe(true)
+    expect(wrapper.find('[aria-label="X 轴 Label 显示毫秒"]').exists()).toBe(true)
+    expect(chart.props('axes')?.x?.labelFormatter?.(0, {} as never)).toBe('1970-01-01 08:00:00')
+
+    await wrapper.get('[aria-label="X 轴 Label 显示毫秒"]').trigger('click')
+    await flushPromises()
+    expect(chart.props('axes')?.x?.labelFormatter?.(123, {} as never)).toBe(
+      '1970-01-01 08:00:00.123',
+    )
+    const timeZoneSelect = wrapper
+      .findAllComponents(Select)
+      .find((select) => select.find('[aria-label="X 轴 Label 时区"]').exists())
+    timeZoneSelect?.vm.$emit('update:value', 'UTC')
+    await flushPromises()
+    expect(chart.props('axes')?.x?.labelFormatter?.(123, {} as never)).toBe(
+      '1970-01-01 00:00:00.123',
+    )
+
+    await wrapper.get('[aria-label="自定义 X 轴 Label"]').trigger('click')
+    await flushPromises()
+    expect(chart.props('axes')?.x?.labelFormatter).toBeUndefined()
+    expect(wrapper.find('[aria-label="X 轴 Label 运算倍率"]').exists()).toBe(false)
+    wrapper.unmount()
+  })
+})