test: add tests for the "delete" hook

tests/hooks/delete.test.ts

@@ -0,0 +1,111 @@
+import { Collection } from '#/src/collection.js'
+import type { HookEventListener } from '#/src/hooks.js'
+import z from 'zod'
+
+it('invokes the delete hook when a record is deleted', async () => {
+  const users = new Collection({
+    schema: z.object({ id: z.number() }),
+  })
+
+  const hook = vi.fn<HookEventListener<typeof users, 'delete'>>()
+  users.hooks.on('delete', hook)
+
+  await users.createMany(5, (index) => ({ id: index + 1 }))
+
+  users.delete((q) => q.where({ id: 2 }))
+
+  expect(hook).toHaveBeenCalledOnce()
+  expect(hook).toHaveBeenCalledWith(
+    expect.objectContaining({
+      data: { deletedRecord: { id: 2 } },
+    }),
+  )
+})
+
+it('invokes the delete hook in the opposite order for every deleted record', async () => {
+  const users = new Collection({
+    schema: z.object({ id: z.number() }),
+  })
+
+  const hook = vi.fn<HookEventListener<typeof users, 'delete'>>()
+  users.hooks.on('delete', hook)
+
+  await users.createMany(5, (index) => ({ id: index + 1 }))
+
+  users.deleteMany((q) => q.where({ id: (id) => id >= 2 && id <= 4 }))
+
+  expect(hook).toHaveBeenCalledTimes(3)
+  expect(hook).toHaveBeenNthCalledWith(
+    1,
+    expect.objectContaining({
+      data: { deletedRecord: { id: 4 } },
+    }),
+  )
+  expect(hook).toHaveBeenNthCalledWith(
+    2,
+    expect.objectContaining({
+      data: { deletedRecord: { id: 3 } },
+    }),
+  )
+  expect(hook).toHaveBeenNthCalledWith(
+    3,
+    expect.objectContaining({
+      data: { deletedRecord: { id: 2 } },
+    }),
+  )
+})
+
+it('does not delete the record if the delete ecent is prevented', async () => {
+  const users = new Collection({
+    schema: z.object({ id: z.number() }),
+  })
+
+  const hook = vi.fn<HookEventListener<typeof users, 'delete'>>((event) => {
+    event.preventDefault()
+  })
+  users.hooks.on('delete', hook)
+
+  await users.createMany(3, (index) => ({ id: index + 1 }))
+  users.delete((q) => q.where({ id: 2 }))
+  expect(hook).toHaveBeenCalledOnce()
+  expect(users.all()).toEqual([{ id: 1 }, { id: 2 }, { id: 3 }])
+})
+
+it('allows preventing the default for specific records', async () => {
+  const users = new Collection({
+    schema: z.object({ id: z.number() }),
+  })
+
+  const hook = vi.fn<HookEventListener<typeof users, 'delete'>>((event) => {
+    if (event.data.deletedRecord.id === 3) {
+      event.preventDefault()
+    }
+  })
+  users.hooks.on('delete', hook)
+
+  await users.createMany(5, (index) => ({ id: index + 1 }))
+
+  users.deleteMany((q) => q.where({ id: (id) => id >= 2 && id <= 4 }))
+
+  expect(hook).toHaveBeenCalledTimes(3)
+  expect(hook).toHaveBeenNthCalledWith(
+    1,
+    expect.objectContaining({
+      data: { deletedRecord: { id: 4 } },
+    }),
+  )
+  expect(hook).toHaveBeenNthCalledWith(
+    2,
+    expect.objectContaining({
+      data: { deletedRecord: { id: 3 } },
+    }),
+  )
+  expect(hook).toHaveBeenNthCalledWith(
+    3,
+    expect.objectContaining({
+      data: { deletedRecord: { id: 2 } },
+    }),
+  )
+
+  expect(users.all()).toEqual([{ id: 1 }, { id: 3 }, { id: 5 }])
+})