feat: make each plugin an npm workspace built by a termix-plugin CLI

plugins/host-metrics/tests/frontend/cards/gpu-history.test.ts

@@ -0,0 +1,66 @@
+import { describe, expect, it } from "vitest";
+import type { GpuDevice } from "@/types/stats-widgets";
+import { appendGpuHistories } from "../../../src/frontend/cards/gpu-history";
+
+function gpu(
+  index: number,
+  utilizationPercent: number | null,
+  memoryPercent: number | null,
+): GpuDevice {
+  return {
+    index,
+    uuid: `GPU-${index}`,
+    name: `GPU ${index}`,
+    driverVersion: "550.54.14",
+    utilizationPercent,
+    memoryUsedMiB: null,
+    memoryTotalMiB: null,
+    memoryPercent,
+    temperatureCelsius: null,
+    powerDrawWatts: null,
+    powerLimitWatts: null,
+    fanPercent: null,
+  };
+}
+
+describe("appendGpuHistories", () => {
+  it("records utilization and memory in a separate series per GPU", () => {
+    const first = appendGpuHistories({}, [gpu(0, 10, 20), gpu(1, 90, 5)], 30);
+    const second = appendGpuHistories(
+      first,
+      [gpu(0, 15, 25), gpu(1, 80, 6)],
+      30,
+    );
+
+    expect(second).toEqual({
+      0: { utilization: [10, 15], memory: [20, 25] },
+      1: { utilization: [90, 80], memory: [5, 6] },
+    });
+  });
+
+  it("keeps only the newest samples once the series is full", () => {
+    let histories = {};
+    for (const value of [1, 2, 3, 4]) {
+      histories = appendGpuHistories(histories, [gpu(0, value, value)], 3);
+    }
+
+    expect(histories).toEqual({
+      0: { utilization: [2, 3, 4], memory: [2, 3, 4] },
+    });
+  });
+
+  it("records an unavailable reading as zero", () => {
+    expect(appendGpuHistories({}, [gpu(0, null, null)], 30)).toEqual({
+      0: { utilization: [0], memory: [0] },
+    });
+  });
+
+  it("drops the series of a GPU that is no longer reported", () => {
+    const before = appendGpuHistories({}, [gpu(0, 10, 10), gpu(1, 20, 20)], 30);
+
+    expect(appendGpuHistories(before, [gpu(0, 11, 11)], 30)).toEqual({
+      0: { utilization: [10, 11], memory: [10, 11] },
+    });
+    expect(appendGpuHistories(before, undefined, 30)).toEqual({});
+  });
+});