Refactor code to use Path class

test/device.ts

@@ -0,0 +1,20 @@
+import ava from "ava";
+import Path from "../lib/common/path";
+import * as device from "../lib/device";
+
+ava("getAliasDeclarations", t => {
+  const path = Path.parse("a.[aa:10,bb.[aaa:100].cc:1].b");
+  const decs = device.getAliasDeclarations(path, 99);
+
+  const expected = ["a.*.b", "a.*.aa", "a.*.bb.*.cc", "a.*.bb.*.aaa"];
+
+  t.plan(24);
+  for (const [i, d] of decs.entries()) {
+    t.is(d.path.toString(), expected[i]);
+    t.is(d.pathGet, 99);
+    t.is(d.pathSet, null);
+    t.deepEqual(d.attrGet, i ? { value: 99 } : null);
+    t.is(d.attrSet, null);
+    t.is(d.defer, true);
+  }
+});