Add tests for tree reset propagation

src/features/trees/tree.ts

@@ -224,7 +224,7 @@ export interface BaseTree {
     id: string;
     /** The link objects for each of the branches of the tree.  */
     links: Ref<Link[]>;
-    /** Cause a reset on this node and propagate it through the tree according to {@link resetPropagation}. */
+    /** Cause a reset on this node and propagate it through the tree according to {@link TreeOptions.resetPropagation}. */
     reset: (node: GenericTreeNode) => void;
     /** A flag that is true while the reset is still propagating through the tree. */
     isResetting: Ref<boolean>;

tests/features/tree.test.ts

@@ -0,0 +1,111 @@
+import { beforeAll, beforeEach, describe, expect, test, vi } from "vitest";
+import { Ref, ref } from "vue";
+import "../utils";
+import {
+    createTree,
+    createTreeNode,
+    defaultResetPropagation,
+    invertedResetPropagation,
+    branchedResetPropagation
+} from "features/trees/tree";
+import { createReset, GenericReset } from "features/reset";
+
+describe("Reset propagation", () => {
+    let shouldReset: Ref<boolean>, shouldNotReset: Ref<boolean>;
+    let goodReset: GenericReset, badReset: GenericReset;
+    beforeAll(() => {
+        shouldReset = ref(false);
+        shouldNotReset = ref(false);
+        goodReset = createReset(() => ({
+            thingsToReset: [],
+            onReset() {
+                shouldReset.value = true;
+            }
+        }));
+        badReset = createReset(() => ({
+            thingsToReset: [],
+            onReset() {
+                shouldNotReset.value = true;
+            }
+        }));
+    });
+    beforeEach(() => {
+        shouldReset.value = false;
+        shouldNotReset.value = false;
+    });
+    test("No resets", () => {
+        expect(() => {
+            const a = createTreeNode(() => ({}));
+            const b = createTreeNode(() => ({}));
+            const c = createTreeNode(() => ({}));
+            const tree = createTree(() => ({
+                nodes: [[a], [b], [c]]
+            }));
+            tree.reset(a);
+        }).not.toThrowError();
+    });
+
+    test("Do not propagate resets", () => {
+        const a = createTreeNode(() => ({ reset: badReset }));
+        const b = createTreeNode(() => ({ reset: badReset }));
+        const c = createTreeNode(() => ({ reset: badReset }));
+        const tree = createTree(() => ({
+            nodes: [[a], [b], [c]]
+        }));
+        tree.reset(b);
+        expect(shouldNotReset.value).toBe(false);
+    });
+
+    test("Default propagation", () => {
+        const a = createTreeNode(() => ({ reset: goodReset }));
+        const b = createTreeNode(() => ({}));
+        const c = createTreeNode(() => ({ reset: badReset }));
+        const tree = createTree(() => ({
+            nodes: [[a], [b], [c]],
+            resetPropagation: defaultResetPropagation
+        }));
+        tree.reset(b);
+        expect(shouldReset.value).toBe(true);
+        expect(shouldNotReset.value).toBe(false);
+    });
+
+    test("Inverted propagation", () => {
+        const a = createTreeNode(() => ({ reset: badReset }));
+        const b = createTreeNode(() => ({}));
+        const c = createTreeNode(() => ({ reset: goodReset }));
+        const tree = createTree(() => ({
+            nodes: [[a], [b], [c]],
+            resetPropagation: invertedResetPropagation
+        }));
+        tree.reset(b);
+        expect(shouldReset.value).toBe(true);
+        expect(shouldNotReset.value).toBe(false);
+    });
+
+    test("Branched propagation", () => {
+        const a = createTreeNode(() => ({ reset: badReset }));
+        const b = createTreeNode(() => ({}));
+        const c = createTreeNode(() => ({ reset: goodReset }));
+        const tree = createTree(() => ({
+            nodes: [[a, b, c]],
+            resetPropagation: branchedResetPropagation,
+            branches: [{ startNode: b, endNode: c }]
+        }));
+        tree.reset(b);
+        expect(shouldReset.value).toBe(true);
+        expect(shouldNotReset.value).toBe(false);
+    });
+
+    test("Branched propagation not bi-directional", () => {
+        const a = createTreeNode(() => ({ reset: badReset }));
+        const b = createTreeNode(() => ({}));
+        const c = createTreeNode(() => ({ reset: badReset }));
+        const tree = createTree(() => ({
+            nodes: [[a, b, c]],
+            resetPropagation: branchedResetPropagation,
+            branches: [{ startNode: c, endNode: b }]
+        }));
+        tree.reset(b);
+        expect(shouldNotReset.value).toBe(false);
+    });
+});