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node_modules/@weborigami/async-tree/test/drivers/MapTree.test.js

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+import assert from "node:assert";
+import { describe, test } from "node:test";
+import MapTree from "../../src/drivers/MapTree.js";
+import * as symbols from "../../src/symbols.js";
+
+describe("MapTree", () => {
+  test("can get the keys of the tree", async () => {
+    const fixture = createFixture();
+    assert.deepEqual(Array.from(await fixture.keys()), ["a", "b", "c"]);
+  });
+
+  test("can get the value for a key", async () => {
+    const fixture = createFixture();
+    const a = await fixture.get("a");
+    assert.equal(a, 1);
+  });
+
+  test("sets parent on subtrees", async () => {
+    const map = new Map([["more", new Map([["a", 1]])]]);
+    const fixture = new MapTree(map);
+    const more = await fixture.get("more");
+    assert.equal(more[symbols.parent], fixture);
+  });
+
+  test("adds trailing slashes to keys for subtrees", async () => {
+    const tree = new MapTree([
+      ["a", 1],
+      ["subtree", new MapTree([["b", 2]])],
+    ]);
+    const keys = Array.from(await tree.keys());
+    assert.deepEqual(keys, ["a", "subtree/"]);
+  });
+
+  test("can retrieve values with optional trailing slash", async () => {
+    const subtree = new MapTree([["b", 2]]);
+    const tree = new MapTree([
+      ["a", 1],
+      ["subtree", subtree],
+    ]);
+    assert.equal(await tree.get("a"), 1);
+    assert.equal(await tree.get("a/"), 1);
+    assert.equal(await tree.get("subtree"), subtree);
+    assert.equal(await tree.get("subtree/"), subtree);
+  });
+
+  test("getting an unsupported key returns undefined", async () => {
+    const fixture = createFixture();
+    assert.equal(await fixture.get("d"), undefined);
+  });
+});
+
+function createFixture() {
+  const map = new Map([
+    ["a", 1],
+    ["b", 2],
+    ["c", 3],
+  ]);
+  return new MapTree(map);
+}