fix(api): quantityToMB 按 MiB 向上取整，配额不再少算零头

internal/api/quantity_test.go

@@ -0,0 +1,31 @@
+package api
+
+import (
+	"testing"
+
+	"k8s.io/apimachinery/pkg/api/resource"
+)
+
+// Sizes reach the quota sums in whole MiB, rounded up: a part-MiB used to be
+// dropped, so a server sized in decimal units counted for less than it holds.
+func TestQuantityToMB(t *testing.T) {
+	for _, c := range []struct {
+		in   string
+		want int
+	}{
+		{"4Gi", 4096},
+		{"1Mi", 1},
+		{"1G", 954},     // 953.67 MiB
+		{"1500M", 1431}, // 1430.51 MiB
+		{"1048577", 2},  // one byte past 1 MiB
+		{"1", 1},
+		{"0", 0},
+	} {
+		if got := quantityToMB(resource.MustParse(c.in)); got != c.want {
+			t.Errorf("quantityToMB(%s) = %d, want %d", c.in, got, c.want)
+		}
+	}
+	if got := quantityToMB(resource.Quantity{}); got != 0 {
+		t.Errorf("quantityToMB(unset) = %d, want 0", got)
+	}
+}