mirror of
https://github.com/voson-wang/toon.git
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test(cli) add streaming events coverage
This commit is contained in:
Johann Schopplich
423
packages/cli/test/json-from-events.test.ts
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423
packages/cli/test/json-from-events.test.ts
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@@ -0,0 +1,423 @@
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import type { JsonStreamEvent } from '../../toon/src/types'
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import { describe, expect, it } from 'vitest'
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import { jsonStreamFromEvents } from '../src/json-from-events'
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describe('jsonStreamFromEvents', () => {
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describe('primitives', () => {
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it('converts null event', async () => {
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const events = [
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{ type: 'primitive' as const, value: null },
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]
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 0))).toBe(JSON.stringify(null))
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 2))).toBe(JSON.stringify(null, null, 2))
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})
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it('converts boolean events', async () => {
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const eventsTrue = [{ type: 'primitive' as const, value: true }]
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const eventsFalse = [{ type: 'primitive' as const, value: false }]
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expect(await join(jsonStreamFromEvents(asyncEvents(eventsTrue), 0))).toBe(JSON.stringify(true))
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expect(await join(jsonStreamFromEvents(asyncEvents(eventsFalse), 0))).toBe(JSON.stringify(false))
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expect(await join(jsonStreamFromEvents(asyncEvents(eventsTrue), 2))).toBe(JSON.stringify(true, null, 2))
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})
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it('converts number events', async () => {
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const events0 = [{ type: 'primitive' as const, value: 0 }]
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const events42 = [{ type: 'primitive' as const, value: 42 }]
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const eventsNeg = [{ type: 'primitive' as const, value: -17 }]
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const eventsFloat = [{ type: 'primitive' as const, value: 3.14159 }]
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expect(await join(jsonStreamFromEvents(asyncEvents(events0), 0))).toBe(JSON.stringify(0))
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expect(await join(jsonStreamFromEvents(asyncEvents(events42), 0))).toBe(JSON.stringify(42))
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expect(await join(jsonStreamFromEvents(asyncEvents(eventsNeg), 0))).toBe(JSON.stringify(-17))
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expect(await join(jsonStreamFromEvents(asyncEvents(eventsFloat), 0))).toBe(JSON.stringify(3.14159))
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expect(await join(jsonStreamFromEvents(asyncEvents(events42), 2))).toBe(JSON.stringify(42, null, 2))
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})
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it('converts string events', async () => {
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const eventsEmpty = [{ type: 'primitive' as const, value: '' }]
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const eventsHello = [{ type: 'primitive' as const, value: 'hello' }]
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const eventsQuotes = [{ type: 'primitive' as const, value: 'with "quotes"' }]
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expect(await join(jsonStreamFromEvents(asyncEvents(eventsEmpty), 0))).toBe(JSON.stringify(''))
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expect(await join(jsonStreamFromEvents(asyncEvents(eventsHello), 0))).toBe(JSON.stringify('hello'))
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expect(await join(jsonStreamFromEvents(asyncEvents(eventsQuotes), 0))).toBe(JSON.stringify('with "quotes"'))
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})
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})
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describe('empty containers', () => {
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it('converts empty array events', async () => {
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const events = [
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{ type: 'startArray' as const, length: 0 },
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{ type: 'endArray' as const },
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]
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 0))).toBe(JSON.stringify([], null, 0))
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 2))).toBe(JSON.stringify([], null, 2))
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})
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it('converts empty object events', async () => {
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const events = [
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{ type: 'startObject' as const },
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{ type: 'endObject' as const },
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]
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 0))).toBe(JSON.stringify({}, null, 0))
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 2))).toBe(JSON.stringify({}, null, 2))
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})
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})
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describe('arrays', () => {
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it('converts simple array events with compact formatting', async () => {
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const events = [
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{ type: 'startArray' as const, length: 3 },
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{ type: 'primitive' as const, value: 1 },
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{ type: 'primitive' as const, value: 2 },
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{ type: 'primitive' as const, value: 3 },
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{ type: 'endArray' as const },
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]
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const value = [1, 2, 3]
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 0))).toBe(JSON.stringify(value, null, 0))
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})
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it('converts simple array events with pretty formatting', async () => {
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const events = [
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{ type: 'startArray' as const, length: 3 },
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{ type: 'primitive' as const, value: 1 },
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{ type: 'primitive' as const, value: 2 },
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{ type: 'primitive' as const, value: 3 },
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{ type: 'endArray' as const },
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]
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const value = [1, 2, 3]
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 2))).toBe(JSON.stringify(value, null, 2))
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})
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it('converts mixed-type array events', async () => {
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const events = [
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{ type: 'startArray' as const, length: 5 },
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{ type: 'primitive' as const, value: 1 },
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{ type: 'primitive' as const, value: 'two' },
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{ type: 'primitive' as const, value: true },
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{ type: 'primitive' as const, value: null },
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'key' },
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{ type: 'primitive' as const, value: 'value' },
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{ type: 'endObject' as const },
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{ type: 'endArray' as const },
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]
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const value = [1, 'two', true, null, { key: 'value' }]
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 0))).toBe(JSON.stringify(value, null, 0))
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 2))).toBe(JSON.stringify(value, null, 2))
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})
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it('converts nested array events', async () => {
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const events = [
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{ type: 'startArray' as const, length: 3 },
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{ type: 'startArray' as const, length: 2 },
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{ type: 'primitive' as const, value: 1 },
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{ type: 'primitive' as const, value: 2 },
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{ type: 'endArray' as const },
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{ type: 'startArray' as const, length: 2 },
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{ type: 'primitive' as const, value: 3 },
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{ type: 'primitive' as const, value: 4 },
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{ type: 'endArray' as const },
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{ type: 'startArray' as const, length: 2 },
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{ type: 'primitive' as const, value: 5 },
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{ type: 'primitive' as const, value: 6 },
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{ type: 'endArray' as const },
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{ type: 'endArray' as const },
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]
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const value = [[1, 2], [3, 4], [5, 6]]
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 0))).toBe(JSON.stringify(value, null, 0))
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 2))).toBe(JSON.stringify(value, null, 2))
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})
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})
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describe('objects', () => {
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it('converts simple object events with compact formatting', async () => {
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const events = [
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'a' },
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{ type: 'primitive' as const, value: 1 },
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{ type: 'key' as const, key: 'b' },
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{ type: 'primitive' as const, value: 2 },
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{ type: 'key' as const, key: 'c' },
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{ type: 'primitive' as const, value: 3 },
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{ type: 'endObject' as const },
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]
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const value = { a: 1, b: 2, c: 3 }
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 0))).toBe(JSON.stringify(value, null, 0))
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})
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it('converts simple object events with pretty formatting', async () => {
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const events = [
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'a' },
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{ type: 'primitive' as const, value: 1 },
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{ type: 'key' as const, key: 'b' },
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{ type: 'primitive' as const, value: 2 },
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{ type: 'key' as const, key: 'c' },
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{ type: 'primitive' as const, value: 3 },
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{ type: 'endObject' as const },
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]
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const value = { a: 1, b: 2, c: 3 }
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 2))).toBe(JSON.stringify(value, null, 2))
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})
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it('converts object events with mixed value types', async () => {
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const events = [
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'num' },
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{ type: 'primitive' as const, value: 42 },
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{ type: 'key' as const, key: 'str' },
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{ type: 'primitive' as const, value: 'hello' },
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{ type: 'key' as const, key: 'bool' },
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{ type: 'primitive' as const, value: true },
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{ type: 'key' as const, key: 'nil' },
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{ type: 'primitive' as const, value: null },
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{ type: 'key' as const, key: 'arr' },
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{ type: 'startArray' as const, length: 3 },
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{ type: 'primitive' as const, value: 1 },
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{ type: 'primitive' as const, value: 2 },
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{ type: 'primitive' as const, value: 3 },
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{ type: 'endArray' as const },
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{ type: 'endObject' as const },
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]
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const value = {
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num: 42,
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str: 'hello',
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bool: true,
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nil: null,
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arr: [1, 2, 3],
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}
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 0))).toBe(JSON.stringify(value, null, 0))
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 2))).toBe(JSON.stringify(value, null, 2))
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})
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it('converts nested object events', async () => {
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const events = [
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'level1' },
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'level2' },
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'level3' },
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{ type: 'primitive' as const, value: 'deep' },
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{ type: 'endObject' as const },
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{ type: 'endObject' as const },
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{ type: 'endObject' as const },
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]
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const value = {
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level1: {
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level2: {
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level3: 'deep',
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},
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},
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}
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 0))).toBe(JSON.stringify(value, null, 0))
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 2))).toBe(JSON.stringify(value, null, 2))
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})
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it('handles special characters in keys', async () => {
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const events = [
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'normal-key' },
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{ type: 'primitive' as const, value: 1 },
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{ type: 'key' as const, key: 'key with spaces' },
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{ type: 'primitive' as const, value: 2 },
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{ type: 'key' as const, key: 'key:with:colons' },
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{ type: 'primitive' as const, value: 3 },
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{ type: 'key' as const, key: 'key"with"quotes' },
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{ type: 'primitive' as const, value: 4 },
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{ type: 'endObject' as const },
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]
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const value = {
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'normal-key': 1,
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'key with spaces': 2,
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'key:with:colons': 3,
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'key"with"quotes': 4,
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}
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 0))).toBe(JSON.stringify(value, null, 0))
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 2))).toBe(JSON.stringify(value, null, 2))
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})
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})
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describe('complex nested structures', () => {
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it('converts object containing arrays', async () => {
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const events = [
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'name' },
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{ type: 'primitive' as const, value: 'Alice' },
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{ type: 'key' as const, key: 'scores' },
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{ type: 'startArray' as const, length: 3 },
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{ type: 'primitive' as const, value: 95 },
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{ type: 'primitive' as const, value: 87 },
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{ type: 'primitive' as const, value: 92 },
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{ type: 'endArray' as const },
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{ type: 'key' as const, key: 'metadata' },
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'tags' },
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{ type: 'startArray' as const, length: 2 },
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{ type: 'primitive' as const, value: 'math' },
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{ type: 'primitive' as const, value: 'science' },
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{ type: 'endArray' as const },
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{ type: 'endObject' as const },
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{ type: 'endObject' as const },
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]
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const value = {
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name: 'Alice',
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scores: [95, 87, 92],
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metadata: {
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tags: ['math', 'science'],
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},
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}
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 0))).toBe(JSON.stringify(value, null, 0))
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 2))).toBe(JSON.stringify(value, null, 2))
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})
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it('converts array of objects', async () => {
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const events = [
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{ type: 'startArray' as const, length: 3 },
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'id' },
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{ type: 'primitive' as const, value: 1 },
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{ type: 'key' as const, key: 'name' },
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{ type: 'primitive' as const, value: 'Alice' },
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{ type: 'endObject' as const },
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'id' },
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{ type: 'primitive' as const, value: 2 },
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{ type: 'key' as const, key: 'name' },
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{ type: 'primitive' as const, value: 'Bob' },
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{ type: 'endObject' as const },
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'id' },
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{ type: 'primitive' as const, value: 3 },
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{ type: 'key' as const, key: 'name' },
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{ type: 'primitive' as const, value: 'Charlie' },
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{ type: 'endObject' as const },
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{ type: 'endArray' as const },
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]
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const value = [
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{ id: 1, name: 'Alice' },
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{ id: 2, name: 'Bob' },
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{ id: 3, name: 'Charlie' },
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]
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 0))).toBe(JSON.stringify(value, null, 0))
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 2))).toBe(JSON.stringify(value, null, 2))
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})
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})
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describe('indentation levels', () => {
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const events = [
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'a' },
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{ type: 'startArray' as const, length: 2 },
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{ type: 'primitive' as const, value: 1 },
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{ type: 'primitive' as const, value: 2 },
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{ type: 'endArray' as const },
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{ type: 'key' as const, key: 'b' },
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'c' },
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{ type: 'primitive' as const, value: 3 },
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{ type: 'endObject' as const },
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{ type: 'endObject' as const },
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]
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const value = { a: [1, 2], b: { c: 3 } }
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it('handles indent=0 (compact)', async () => {
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 0))).toBe(JSON.stringify(value, null, 0))
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})
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it('handles indent=2', async () => {
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 2))).toBe(JSON.stringify(value, null, 2))
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})
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it('handles indent=4', async () => {
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 4))).toBe(JSON.stringify(value, null, 4))
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})
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it('handles indent=8', async () => {
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expect(await join(jsonStreamFromEvents(asyncEvents(events), 8))).toBe(JSON.stringify(value, null, 8))
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})
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})
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describe('error handling', () => {
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it('throws on mismatched endObject event', async () => {
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const events = [
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{ type: 'startArray' as const, length: 0 },
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{ type: 'endObject' as const }, // Wrong closing event
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]
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await expect(async () => {
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await join(jsonStreamFromEvents(asyncEvents(events), 0))
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}).rejects.toThrow('Mismatched endObject event')
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})
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it('throws on mismatched endArray event', async () => {
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const events = [
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{ type: 'startObject' as const },
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{ type: 'endArray' as const }, // Wrong closing event
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]
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await expect(async () => {
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await join(jsonStreamFromEvents(asyncEvents(events), 0))
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}).rejects.toThrow('Mismatched endArray event')
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})
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it('throws on key event outside object context', async () => {
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const events = [
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{ type: 'key' as const, key: 'invalid' },
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{ type: 'primitive' as const, value: 1 },
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]
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await expect(async () => {
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await join(jsonStreamFromEvents(asyncEvents(events), 0))
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}).rejects.toThrow('Key event outside of object context')
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})
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it('throws on primitive in object without preceding key', async () => {
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const events = [
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{ type: 'startObject' as const },
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{ type: 'primitive' as const, value: 'invalid' }, // No key before primitive
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{ type: 'endObject' as const },
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]
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await expect(async () => {
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await join(jsonStreamFromEvents(asyncEvents(events), 0))
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}).rejects.toThrow('Primitive event in object without preceding key')
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})
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it('throws on incomplete event stream', async () => {
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const events = [
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{ type: 'startObject' as const },
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{ type: 'key' as const, key: 'name' },
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{ type: 'primitive' as const, value: 'Alice' },
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// Missing `endObject`
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]
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await expect(async () => {
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await join(jsonStreamFromEvents(asyncEvents(events), 0))
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}).rejects.toThrow('Incomplete event stream: unclosed objects or arrays')
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})
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})
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})
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/**
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* Converts array of events to async iterable.
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*/
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async function* asyncEvents(events: JsonStreamEvent[]): AsyncIterable<JsonStreamEvent> {
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for (const event of events) {
|
||||
await Promise.resolve()
|
||||
yield event
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Joins chunks from an async iterable into a single string.
|
||||
*/
|
||||
async function join(iter: AsyncIterable<string>): Promise<string> {
|
||||
const chunks: string[] = []
|
||||
for await (const chunk of iter) {
|
||||
chunks.push(chunk)
|
||||
}
|
||||
return chunks.join('')
|
||||
}
|
||||
Reference in New Issue
Block a user