pagesState.test.ts109 lines · main

1	import { beforeEach, describe, expect, it } from 'vitest'
2
3	import { initPagesState, PageType, type IPagesState, type PageDefinition } from './pagesState'
4
5	describe('pagesState', () => {
6	let pagesState: IPagesState
7
8	beforeEach(() => {
9	pagesState = initPagesState()
10	})
11
12	it('Starts with an empty page stack', () => {
13	expect(pagesState.pageStack.length).toBe(0)
14	})
15
16	it('Starts with no pages', () => {
17	expect(Object.keys(pagesState.commandPages).length).toBe(0)
18	})
19
20	it('Registers a new page', () => {
21	const newPage: PageDefinition = {
22	type: PageType.Commands,
23	sections: [],
24	}
25
26	pagesState.registerNewPage('page', newPage)
27
28	expect(pagesState.commandPages.page).toStrictEqual(newPage)
29	})
30
31	it('Returned function unregisters the page', () => {
32	const newPage: PageDefinition = {
33	type: PageType.Commands,
34	sections: [],
35	}
36
37	const unregister = pagesState.registerNewPage('page', newPage)
38	expect(pagesState.commandPages.page).toStrictEqual(newPage)
39
40	unregister()
41	expect(Object.keys(pagesState.commandPages).length).toBe(0)
42	})
43
44	it('Registered page can be appended to page stack', () => {
45	const newPage: PageDefinition = {
46	type: PageType.Commands,
47	sections: [],
48	}
49
50	pagesState.registerNewPage('page', newPage)
51	pagesState.appendPageStack('page')
52
53	expect(pagesState.pageStack.length).toBe(1)
54	expect(pagesState.pageStack[0]).toBe('page')
55	})
56
57	it('Non-registered page cannot be appended to page stack', () => {
58	pagesState.appendPageStack('invalid')
59
60	expect(pagesState.pageStack.length).toBe(0)
61	})
62
63	it('Unregistered page cannot be appended to page stack', () => {
64	const newPage: PageDefinition = {
65	type: PageType.Commands,
66	sections: [],
67	}
68
69	const unregister = pagesState.registerNewPage('page', newPage)
70	unregister()
71
72	pagesState.appendPageStack('page')
73
74	expect(pagesState.pageStack.length).toBe(0)
75	})
76
77	it('Noops if reappending the currently active page', () => {
78	const newPage: PageDefinition = {
79	type: PageType.Commands,
80	sections: [],
81	}
82
83	pagesState.registerNewPage('page', newPage)
84
85	pagesState.appendPageStack('page')
86	pagesState.appendPageStack('page')
87
88	expect(pagesState.pageStack.length).toBe(1)
89	expect(pagesState.pageStack[0]).toBe('page')
90	})
91
92	it('Unregistered page is automatically popped from stack', () => {
93	const newPage: PageDefinition = {
94	type: PageType.Commands,
95	sections: [],
96	}
97
98	const unregister = pagesState.registerNewPage('page', newPage)
99	pagesState.appendPageStack('page')
100	expect(pagesState.pageStack.length).toBe(1)
101
102	unregister()
103	expect(pagesState.pageStack.length).toBe(0)
104	})
105
106	it('Does not error when popping from empty pagestack', () => {
107	expect(() => pagesState.popPageStack()).not.toThrowError()
108	})
109	})