Add shell plugin model tests

shell/plugins/monitor/MonitorModel.js

@@ -0,0 +1,52 @@
+function clampBrightness(value) {
+  var n = Number(value)
+  if (!isFinite(n)) return 1
+  return Math.max(1, Math.min(100, Math.round(n)))
+}
+
+function normalizeScale(scale) {
+  var n = parseFloat(String(scale || ""))
+  if (!isFinite(n)) return ""
+  return String(Math.round(n * 100) / 100)
+}
+
+function brightnessName(percent) {
+  var p = Math.round(percent)
+  if (p >= 95) return "Sun blast"
+  if (p >= 80) return "Solar flare"
+  if (p >= 65) return "Golden hour"
+  if (p >= 45) return "Even day"
+  if (p >= 30) return "Soft glow"
+  if (p >= 20) return "Lamp light"
+  if (p >= 10) return "Candlelit"
+  return "Night owl"
+}
+
+function parseDisplays(raw) {
+  var displays = []
+  try {
+    displays = raw ? JSON.parse(String(raw)) : []
+  } catch (e) {
+    displays = []
+  }
+  if (!Array.isArray(displays)) displays = []
+
+  var count = 0
+  for (var i = 0; i < displays.length; i++) {
+    if (displays[i] && displays[i].enabled) count++
+  }
+
+  return {
+    displays: displays,
+    enabledDisplayCount: count
+  }
+}
+
+if (typeof module !== "undefined") {
+  module.exports = {
+    clampBrightness: clampBrightness,
+    normalizeScale: normalizeScale,
+    brightnessName: brightnessName,
+    parseDisplays: parseDisplays
+  }
+}