Test extensive coverage and improvement

cmd/status/metrics_health_test.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestCalculateHealthScorePerfect(t *testing.T) {
+	score, msg := calculateHealthScore(
+		CPUStatus{Usage: 10},
+		MemoryStatus{UsedPercent: 20, Pressure: "normal"},
+		[]DiskStatus{{UsedPercent: 30}},
+		DiskIOStatus{ReadRate: 5, WriteRate: 5},
+		ThermalStatus{CPUTemp: 40},
+	)
+
+	if score != 100 {
+		t.Fatalf("expected perfect score 100, got %d", score)
+	}
+	if msg != "Excellent" {
+		t.Fatalf("unexpected message %q", msg)
+	}
+}
+
+func TestCalculateHealthScoreDetectsIssues(t *testing.T) {
+	score, msg := calculateHealthScore(
+		CPUStatus{Usage: 95},
+		MemoryStatus{UsedPercent: 90, Pressure: "critical"},
+		[]DiskStatus{{UsedPercent: 95}},
+		DiskIOStatus{ReadRate: 120, WriteRate: 80},
+		ThermalStatus{CPUTemp: 90},
+	)
+
+	if score >= 40 {
+		t.Fatalf("expected heavy penalties bringing score down, got %d", score)
+	}
+	if msg == "Excellent" {
+		t.Fatalf("expected message to include issues, got %q", msg)
+	}
+	if !strings.Contains(msg, "High CPU") {
+		t.Fatalf("message should mention CPU issue: %q", msg)
+	}
+	if !strings.Contains(msg, "Disk Almost Full") {
+		t.Fatalf("message should mention disk issue: %q", msg)
+	}
+}
+
+func TestFormatUptime(t *testing.T) {
+	if got := formatUptime(65); got != "1m" {
+		t.Fatalf("expected 1m, got %s", got)
+	}
+	if got := formatUptime(3600 + 120); got != "1h 2m" {
+		t.Fatalf("expected \"1h 2m\", got %s", got)
+	}
+	if got := formatUptime(86400*2 + 3600*3 + 60*5); got != "2d 3h 5m" {
+		t.Fatalf("expected \"2d 3h 5m\", got %s", got)
+	}
+}