feat(deploy): 在线更新 - 新增后台检查、强制备份迁移与失败自动回退

backend/internal/hostupdate/version_test.go

@@ -0,0 +1,27 @@
+package hostupdate
+
+import "testing"
+
+func TestCompareVersions(t *testing.T) {
+	tests := []struct {
+		left, right string
+		want        int
+	}{
+		{"v1.2.0-preview.2", "v1.2.0-preview.3", -1},
+		{"v1.2.0-preview.10", "v1.2.0-preview.3", 1},
+		{"v1.2.0-preview.3", "v1.2.0", -1},
+		{"v1.2.1", "v1.2.0", 1},
+		{"v1.2.0", "v1.2.0", 0},
+	}
+	for _, test := range tests {
+		got := CompareVersions(test.left, test.right)
+		if got < 0 {
+			got = -1
+		} else if got > 0 {
+			got = 1
+		}
+		if got != test.want {
+			t.Fatalf("CompareVersions(%q, %q)=%d, want %d", test.left, test.right, got, test.want)
+		}
+	}
+}