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

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+import assert from "node:assert";
+import { describe, test } from "node:test";
+import { ObjectTree, Tree } from "../../src/internal.js";
+import * as symbols from "../../src/symbols.js";
+
+describe("ObjectTree", () => {
+  test("can get the keys of the tree", async () => {
+    const fixture = createFixture();
+    assert.deepEqual(Array.from(await fixture.keys()), [
+      "Alice.md",
+      "Bob.md",
+      "Carol.md",
+    ]);
+  });
+
+  test("can get the value for a key", async () => {
+    const fixture = createFixture();
+    const alice = await fixture.get("Alice.md");
+    assert.equal(alice, "Hello, **Alice**.");
+  });
+
+  test("getting an unsupported key returns undefined", async () => {
+    const fixture = createFixture();
+    assert.equal(await fixture.get("xyz"), undefined);
+  });
+
+  test("getting a null/undefined key throws an exception", async () => {
+    const fixture = createFixture();
+    await assert.rejects(async () => {
+      await fixture.get(null);
+    });
+    await assert.rejects(async () => {
+      await fixture.get(undefined);
+    });
+  });
+
+  test("can set a value", async () => {
+    const tree = new ObjectTree({
+      a: 1,
+      b: 2,
+      c: 3,
+    });
+
+    // Update existing key
+    await tree.set("a", 4);
+
+    // Delete key
+    await tree.set("b", undefined);
+
+    // Overwrite key with trailing slash
+    await tree.set("c/", {});
+
+    // New key
+    await tree.set("d", 5);
+
+    assert.deepEqual(await Tree.entries(tree), [
+      ["a", 4],
+      ["c/", {}],
+      ["d", 5],
+    ]);
+  });
+
+  test("can wrap a class instance", async () => {
+    class Foo {
+      constructor() {
+        this.a = 1;
+      }
+
+      get prop() {
+        return this._prop;
+      }
+      set prop(prop) {
+        this._prop = prop;
+      }
+    }
+    class Bar extends Foo {
+      method() {}
+    }
+    const bar = new Bar();
+    /** @type {any} */ (bar).extra = "Hello";
+    const fixture = new ObjectTree(bar);
+    assert.deepEqual(await Tree.entries(fixture), [
+      ["a", 1],
+      ["extra", "Hello"],
+      ["prop", undefined],
+    ]);
+    assert.equal(await fixture.get("a"), 1);
+    await fixture.set("prop", "Goodbye");
+    assert.equal(bar.prop, "Goodbye");
+    assert.equal(await fixture.get("prop"), "Goodbye");
+  });
+
+  test("sets parent symbol on subobjects", async () => {
+    const fixture = new ObjectTree({
+      sub: {},
+    });
+    const sub = await fixture.get("sub");
+    assert.equal(sub[symbols.parent], fixture);
+  });
+
+  test("sets parent on subtrees", async () => {
+    const fixture = new ObjectTree({
+      a: 1,
+      more: new ObjectTree({
+        b: 2,
+      }),
+    });
+    const more = await fixture.get("more");
+    assert.equal(more.parent, fixture);
+  });
+
+  test("adds trailing slashes to keys for subtrees", async () => {
+    const tree = new ObjectTree({
+      a1: 1,
+      a2: new ObjectTree({
+        b1: 2,
+      }),
+      a3: 3,
+      a4: new ObjectTree({
+        b2: 4,
+      }),
+    });
+    const keys = Array.from(await tree.keys());
+    assert.deepEqual(keys, ["a1", "a2/", "a3", "a4/"]);
+  });
+
+  test("can retrieve values with optional trailing slash", async () => {
+    const subtree = {
+      async get(key) {},
+      async keys() {},
+    };
+    const tree = new ObjectTree({
+      a: 1,
+      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("method on an object is bound to the object", async () => {
+    const n = new Number(123);
+    const tree = new ObjectTree(n);
+    const method = await tree.get("toString");
+    assert.equal(method(), "123");
+  });
+});
+
+function createFixture() {
+  return new ObjectTree({
+    "Alice.md": "Hello, **Alice**.",
+    "Bob.md": "Hello, **Bob**.",
+    "Carol.md": "Hello, **Carol**.",
+  });
+}