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deepseek-harness/packages/core/system-prompt/tests/invariant.spec.ts
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TypeScript

import { describe, expect, it } from 'vitest'
import { Context } from 'cordis'
import type { PromptAssembly } from '@deepseek-ai/dsh-system-prompt'
import * as SystemPromptInvariant from '@deepseek-ai/dsh-system-prompt/invariant'
import InvariantService from '@deepseek-ai/dsh-invariants'
async function setup(): Promise<Context> {
const ctx = new Context()
await ctx.plugin(InvariantService)
await ctx.plugin(SystemPromptInvariant)
return ctx
}
const valid = (): PromptAssembly => ({
sections: [{ name: 'identity', text: 'prompt' }],
tools: [{ name: 'echo', description: 'Echo', parameters: {} }],
variables: { cwd: '/repo', optional: undefined },
})
async function assemble(ctx: Context, result: PromptAssembly): Promise<PromptAssembly> {
return ctx.waterfall(
ctx as never, 'system-prompt/assemble', valid(), {},
() => Promise.resolve(result),
)
}
describe('system-prompt invariants', () => {
it('accepts a well-formed authoritative assembly', async () => {
const ctx = await setup()
await expect(assemble(ctx, valid())).resolves.toEqual(valid())
})
it.each([
[{ ...valid(), sections: [{ name: '', text: 'x' }] }, /section names must be non-empty/],
[{ ...valid(), sections: [{ name: 'x', text: 'a' }, { name: 'x', text: 'b' }] }, /section name "x" is duplicated/],
[{ ...valid(), sections: [{ name: 'x', text: 1 as never }] }, /section "x" text must be a string/],
[{ ...valid(), tools: [{ name: '', description: 'x', parameters: {} }] }, /tool names must be non-empty/],
[{ ...valid(), variables: { Bad: 'x' } }, /variable name "Bad" is invalid/],
[{ ...valid(), variables: { value: 1 as never } }, /variable "value" must be a string or undefined/],
])('rejects malformed authoritative assembly %#', async (assembly, message) => {
const ctx = await setup()
await expect(assemble(ctx, assembly)).rejects.toThrow(message)
})
})