Fix regression in device.unpack

lib/device.ts

@@ -140,7 +140,7 @@ export function unpack(
       if (deviceData.attributes.has(p, revision)) allMatches.push(p);
 
     for (let i = path.length - 1; i >= 0; --i) {
-      if (path.alias & (i << i)) {
+      if (path.alias & (1 << i)) {
         for (const [param, val] of path.segments[i] as [Path, string][]) {
           const p = wildcardPath.slice(0, i + 1).concat(param);
           const unpacked = unpack(deviceData, p, revision);
@@ -156,11 +156,13 @@ export function unpack(
             ) {
               for (let m = 0; m < allMatches.length; ++m) {
                 let k;
+                const match = allMatches[m];
+                if (!match) continue;
                 for (k = i; k >= 0; --k)
-                  if (allMatches[m].segments[k] !== up.segments[k]) break;
+                  if (match.segments[k] !== up.segments[k]) break;
 
                 if (k < 0) {
-                  filtered.push(allMatches[m]);
+                  filtered.push(match);
                   allMatches[m] = null;
                 }
               }

lib/session.ts

@@ -2139,7 +2139,7 @@ function processInstances(
   defer: boolean
 ): void {
   parent = sessionContext.deviceData.paths.add(parent);
-  let instancesToCreate, instancesToDelete;
+  let instancesToCreate: InstanceSet, instancesToDelete: Set<Path>;
   if (parent.segments[0] === "Downloads") {
     if (parent.length !== 1) return;
     instancesToDelete = sessionContext.syncState.downloadsToDelete;

test/device.ts

@@ -1,6 +1,9 @@
 import ava from "ava";
 import Path from "../lib/common/path";
 import * as device from "../lib/device";
+import PathSet from "../lib/common/path-set";
+import VersionedMap from "../lib/versioned-map";
+import { Attributes } from "../lib/types";
 
 ava("getAliasDeclarations", t => {
   const path = Path.parse("a.[aa:10,bb.[aaa:100].cc:1].b");
@@ -18,3 +21,77 @@ ava("getAliasDeclarations", t => {
     t.is(d.defer, true);
   }
 });
+
+ava("unpack", t => {
+  const now = Date.now();
+  const deviceData = {
+    paths: new PathSet(),
+    timestamps: new VersionedMap<Path, number>(),
+    attributes: new VersionedMap<Path, Attributes>(),
+    trackers: new Map<Path, { [name: string]: number }>(),
+    changes: new Set<string>()
+  };
+
+  device.set(deviceData, Path.parse("a.1.b"), now, {
+    value: [now, ["b", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.1.c"), now, {
+    value: [now, ["c", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.1.a.1.a"), now, {
+    value: [now, ["", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.1.a.1.b"), now, {
+    value: [now, ["b1", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.1.a.1.c"), now, {
+    value: [now, ["c1", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.1.a.2.a"), now, {
+    value: [now, ["", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.1.a.2.b"), now, {
+    value: [now, ["b2", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.1.a.2.c"), now, {
+    value: [now, ["c2", "xsd:string"]]
+  });
+
+  device.set(deviceData, Path.parse("a.2.b"), now, {
+    value: [now, ["b", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.2.c"), now, {
+    value: [now, ["c", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.2.a.1.a"), now, {
+    value: [now, ["", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.2.a.1.b"), now, {
+    value: [now, ["b1", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.2.a.1.c"), now, {
+    value: [now, ["c1", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.2.a.2.a"), now, {
+    value: [now, ["", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.2.a.2.b"), now, {
+    value: [now, ["c1", "xsd:string"]]
+  });
+  device.set(deviceData, Path.parse("a.2.a.2.c"), now, {
+    value: [now, ["b1", "xsd:string"]]
+  });
+
+  let unpacked: Path[];
+  unpacked = device.unpack(
+    deviceData,
+    Path.parse("a.[b:b,c:c].a.[b:b1,c:c1].a")
+  );
+  t.is(unpacked.length, 2);
+  t.is(unpacked[0].toString(), "a.1.a.1.a");
+  t.is(unpacked[1].toString(), "a.2.a.1.a");
+
+  unpacked = device.unpack(deviceData, Path.parse("a.*.a.[b:c1,c:b1].a"));
+  t.is(unpacked.length, 1);
+  t.is(unpacked[0].toString(), "a.2.a.2.a");
+});