support es6 imports in Jest tests

Switching to lodash-es caused Jest to fail. The standard Jest workflow
would be to transpile things with Bazel, but we can do it faster by
bundling with esbuild.

the log in lib.test.ts has revealed numbers are being set as Long instead
of JS numbers, and the published workaround for it is not working :-(

ts/deckconfig/BUILD.bazel

@@ -126,11 +126,9 @@ svelte_check(
 )
 
 jest_test(
-    data = [
-        "@npm//protobufjs",
-    ],
     deps = [
         ":lib",
         "//ts/lib:backend_proto",
+        "@npm//protobufjs",
     ],
 )

ts/deckconfig/lib.test.ts

@@ -0,0 +1,93 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
+import * as pb from "anki/backend_proto";
+import { DeckConfigState } from "./lib";
+
+const exampleData = {
+    allConfig: [
+        {
+            config: {
+                id: "1",
+                name: "Default",
+                mtimeSecs: "1618570764",
+                usn: -1,
+                config: {
+                    learnSteps: [1, 10],
+                    relearnSteps: [10],
+                    newPerDay: 20,
+                    reviewsPerDay: 200,
+                    initialEase: 2.5,
+                    easyMultiplier: 1.2999999523162842,
+                    hardMultiplier: 1.2000000476837158,
+                    intervalMultiplier: 1,
+                    maximumReviewInterval: 36500,
+                    minimumLapseInterval: 1,
+                    graduatingIntervalGood: 1,
+                    graduatingIntervalEasy: 4,
+                    leechAction: "LEECH_ACTION_TAG_ONLY",
+                    leechThreshold: 8,
+                    capAnswerTimeToSecs: 60,
+                },
+            },
+            useCount: 1,
+        },
+        {
+            config: {
+                id: "1618570764780",
+                name: "another one",
+                mtimeSecs: "1618570781",
+                usn: -1,
+                config: {
+                    learnSteps: [1, 10, 20, 30],
+                    relearnSteps: [10],
+                    newPerDay: 40,
+                    reviewsPerDay: 200,
+                    initialEase: 2.5,
+                    easyMultiplier: 1.2999999523162842,
+                    hardMultiplier: 1.2000000476837158,
+                    intervalMultiplier: 1,
+                    maximumReviewInterval: 36500,
+                    minimumLapseInterval: 1,
+                    graduatingIntervalGood: 1,
+                    graduatingIntervalEasy: 4,
+                    leechAction: "LEECH_ACTION_TAG_ONLY",
+                    leechThreshold: 8,
+                    capAnswerTimeToSecs: 60,
+                },
+            },
+            useCount: 1,
+        },
+    ],
+    currentDeck: {
+        name: "Default::child",
+        configId: "1618570764780",
+        parentConfigIds: [1],
+    },
+    defaults: {
+        config: {
+            learnSteps: [1, 10],
+            relearnSteps: [10],
+            newPerDay: 20,
+            reviewsPerDay: 200,
+            initialEase: 2.5,
+            easyMultiplier: 1.2999999523162842,
+            hardMultiplier: 1.2000000476837158,
+            intervalMultiplier: 1,
+            maximumReviewInterval: 36500,
+            minimumLapseInterval: 1,
+            graduatingIntervalGood: 1,
+            graduatingIntervalEasy: 4,
+            leechAction: "LEECH_ACTION_TAG_ONLY",
+            leechThreshold: 8,
+            capAnswerTimeToSecs: 60,
+        },
+    },
+};
+
+test("create", () => {
+    const empty = pb.BackendProto.DeckConfigForUpdate.fromObject(exampleData);
+    console.log(empty);
+    const state = new DeckConfigState(empty);
+    expect(state.currentDeck.name).toBe("Default::child");
+});

ts/deckconfig/lib.ts

@@ -62,9 +62,11 @@ export class DeckConfigState {
                 useCount: config.useCount!,
             };
         });
-        this.selectedIdx =
+        this.selectedIdx = Math.max(
-            this.configs.findIndex((c) => c.config.id === this.currentDeck.configId) ??
+            0,
-            0;
+            this.configs.findIndex((c) => c.config.id === this.currentDeck.configId)
+        );
+
         // decrement the use count of the starting item, as we'll apply +1 to currently
         // selected one at display time
         this.configs[this.selectedIdx].useCount -= 1;

ts/jest.bzl

@@ -1,19 +1,46 @@
 load("@npm//@bazel/typescript:index.bzl", "ts_library")
+load("@esbuild_toolchain//:esbuild.bzl", esbuild = "esbuild_macro")
 load("@npm//jest-cli:index.bzl", _jest_test = "jest_test")
 
-def jest_test(deps, data = [], name = "jest"):
+def jest_test(deps, name = "jest"):
     "Build *.test.ts into a library, then test it with Jest."
 
-    # compile sources
+    ts_sources = native.glob(["*.test.ts"])
+
+    # compile sources for type checking
     ts_library(
         name = name + "_lib",
-        srcs = native.glob(["*.test.ts"]),
+        srcs = ts_sources,
         tsconfig = "//ts:tsconfig.json",
         deps = deps + [
             "@npm//@types/jest",
         ],
     )
 
+    # bundle each test file up with its dependencies for jest
+    bundled_srcs = []
+    for ts_src in ts_sources:
+        base = ts_src.replace(".test.ts", "")
+        bundle_name = base + ".bundle.test"
+        bundled_srcs.append(bundle_name)
+        esbuild(
+            name = bundle_name,
+            args = [
+                "--resolve-extensions=.mjs,.js",
+                "--log-level=warning",
+                "--platform=node",
+                "--external:protobufjs",
+                "--keep-names",
+            ],
+            entry_point = ts_src,
+            output = bundle_name + ".js",
+            deps = [
+                name + "_lib",
+            ] + deps,
+            # the code shaking saves close to a second off the deckconfig/lib.test.ts test
+            minify = True,
+        )
+
     # then test them
     _jest_test(
         name = name,
@@ -25,8 +52,7 @@ def jest_test(deps, data = [], name = "jest"):
             "--config",
             "$(location //ts:jest.config.js)",
         ],
-        data = data + [
+        data = bundled_srcs + [
-            name + "_lib",
             "//ts:jest.config.js",
         ],
         target_compatible_with = select({

ts/lib/BUILD.bazel

@@ -78,9 +78,6 @@ eslint_test(
 )
 
 jest_test(
-    data = [
-        "@npm//protobufjs",
-    ],
     deps = [
         ":lib",
     ],