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test(to-hierarchy): increase test coverage

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Eric Liu 2025-04-12 15:34:46 -07:00
commit a514f284e6
1 changed files with 151 additions and 1 deletions
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152
tests/TreeView/toHierarchy.test.ts
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@ -1,4 +1,4 @@
import { toHierarchy } from "../../src/utils/toHierarchy";
import { toHierarchy } from "carbon-components-svelte";
describe("toHierarchy", () => {
test("should create a flat hierarchy when no items have parents", () => {
@ -102,4 +102,154 @@ describe("toHierarchy", () => {
expect(result[0].nodes?.[0]).not.toHaveProperty("nodes");
});
test("should handle empty input array", () => {
const result = toHierarchy<
{ id: string | number; parentId?: string | number },
"parentId"
>([], (item) => item.parentId || null);
expect(result).toEqual([]);
});
test("should handle non-existent parent IDs", () => {
const input = [
{ id: 1, name: "Root" },
{ id: 2, name: "Child", pid: 999 },
];
const result = toHierarchy(input, (item) => item.pid);
expect(result).toEqual([
{ id: 1, name: "Root" },
{ id: 2, name: "Child", pid: 999 },
]);
});
test("should handle deeply nested structures", () => {
const input = [
{ id: 1, name: "Level 1" },
{ id: 2, name: "Level 2", pid: 1 },
{ id: 3, name: "Level 3", pid: 2 },
{ id: 4, name: "Level 4", pid: 3 },
{ id: 5, name: "Level 5", pid: 4 },
];
const result = toHierarchy(input, (item) => item.pid);
expect(result).toEqual([
{
id: 1,
name: "Level 1",
nodes: [
{
id: 2,
name: "Level 2",
pid: 1,
nodes: [
{
id: 3,
name: "Level 3",
pid: 2,
nodes: [
{
id: 4,
name: "Level 4",
pid: 3,
nodes: [
{
id: 5,
name: "Level 5",
pid: 4,
},
],
},
],
},
],
},
],
},
]);
});
test("should handle mixed ID types", () => {
const input = [
{ id: "root", name: "Root" },
{ id: 1, name: "Child 1", pid: "root" },
{ id: "2", name: "Child 2", pid: "root" },
];
const result = toHierarchy(input, (item) => item.pid);
expect(result).toEqual([
{
id: "root",
name: "Root",
nodes: [
{
id: 1,
name: "Child 1",
pid: "root",
},
{
id: "2",
name: "Child 2",
pid: "root",
},
],
},
]);
});
test("should preserve additional properties", () => {
const input = [
{ id: 1, name: "Root", extra: "data", meta: { key: "value" } },
{ id: 2, name: "Child", pid: 1, flag: true, count: 42 },
];
const result = toHierarchy(input, (item) => item.pid);
expect(result).toEqual([
{
id: 1,
name: "Root",
extra: "data",
meta: { key: "value" },
nodes: [
{
id: 2,
name: "Child",
pid: 1,
flag: true,
count: 42,
},
],
},
]);
});
test("should handle null/undefined parent IDs", () => {
const input = [
{ id: 1, name: "Root 1" },
{ id: 2, name: "Root 2", pid: null },
{ id: 3, name: "Root 3", pid: undefined },
{ id: 4, name: "Child", pid: 1 },
];
const result = toHierarchy(input, (item) => item.pid);
expect(result).toEqual([
{
id: 1,
name: "Root 1",
nodes: [
{
id: 4,
name: "Child",
pid: 1,
},
],
},
{
id: 2,
name: "Root 2",
pid: null,
},
{
id: 3,
name: "Root 3",
pid: undefined,
},
]);
});
});