feat(demo): replace source waveforms with simulated data

src/data/simulatedWaveforms.test.ts

@@ -0,0 +1,31 @@
+import { describe, expect, it } from 'vitest'
+
+import { createSimulatedWaveformData } from './simulatedWaveforms'
+
+describe('simulated waveform data', () => {
+  it('creates deterministic, finite six-channel data', () => {
+    const first = createSimulatedWaveformData()
+    const second = createSimulatedWaveformData()
+
+    expect(first).toEqual(second)
+    expect(first.kind).toBe('series')
+    if (first.kind !== 'series') return
+
+    expect(first.series).toHaveLength(6)
+    expect(new Set(first.series.map((series) => series.id)).size).toBe(6)
+    first.series.forEach((series) => {
+      expect(series.data.kind).toBe('points')
+      if (series.data.kind !== 'points') return
+      expect(series.data.points).toHaveLength(1_000)
+      expect(series.data.points[0]?.x).toBe(-5)
+      expect(series.data.points.at(-1)?.x).toBe(5)
+      series.data.points.forEach((point) => {
+        expect(Number.isFinite(point.x)).toBe(true)
+        expect(Number.isFinite(point.y)).toBe(true)
+        if (point.error !== undefined) expect(point.error).toBeGreaterThanOrEqual(0)
+        if (point.lowerError !== undefined) expect(point.lowerError).toBeGreaterThanOrEqual(0)
+        if (point.upperError !== undefined) expect(point.upperError).toBeGreaterThanOrEqual(0)
+      })
+    })
+  })
+})