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6dec997 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 | import { describe, expect, it } from "vitest";
import { z } from "zod";
import {
ContractParseError,
ContractValidationError,
generateContract,
staticModel
} from "../src/index.js";
const Profile = z.object({
name: z.string(),
seniority: z.enum(["junior", "mid", "senior"]),
skills: z.array(z.string()).min(1)
});
describe("generateContract", () => {
it("returns validated data from strict JSON", async () => {
const result = await generateContract({
model: staticModel([
JSON.stringify({ name: "Mira", seniority: "senior", skills: ["infra"] })
]),
schema: Profile,
prompt: "Extract the profile."
});
expect(result.data.name).toBe("Mira");
expect(result.attempts).toBe(1);
});
it("extracts JSON from a fenced response", async () => {
const result = await generateContract({
model: staticModel([
"```json\n{\"name\":\"Lee\",\"seniority\":\"mid\",\"skills\":[\"ml\"]}\n```"
]),
schema: Profile,
prompt: "Extract the profile."
});
expect(result.data).toEqual({
name: "Lee",
seniority: "mid",
skills: ["ml"]
});
});
it("repairs validation failures using a retry prompt", async () => {
const prompts: string[] = [];
const result = await generateContract({
model: {
async generate(prompt) {
prompts.push(prompt);
if (prompts.length === 1) {
return JSON.stringify({ name: "Ari", seniority: "principal", skills: [] });
}
return JSON.stringify({ name: "Ari", seniority: "senior", skills: ["platform"] });
}
},
schema: Profile,
prompt: "Extract the profile.",
retries: 1
});
expect(result.data.seniority).toBe("senior");
expect(result.attempts).toBe(2);
expect(prompts[1]).toContain("Return only corrected JSON");
expect(result.replay.attempts[0]?.issues).toHaveLength(2);
});
it("emits useful events", async () => {
const events: string[] = [];
await generateContract({
model: staticModel([
JSON.stringify({ name: "Noor", seniority: "junior", skills: ["ops"] })
]),
schema: Profile,
prompt: "Extract the profile.",
onEvent(event) {
events.push(event.type);
}
});
expect(events).toEqual(["attempt", "success"]);
});
it("throws validation errors with replay data", async () => {
await expect(
generateContract({
model: staticModel([JSON.stringify({ name: "Kai", seniority: "staff", skills: [] })]),
schema: Profile,
prompt: "Extract the profile."
})
).rejects.toMatchObject({
name: "ContractValidationError",
replay: {
attempts: [
expect.objectContaining({
attempt: 1,
rawText: expect.any(String)
})
]
}
} satisfies Partial<ContractValidationError>);
});
it("throws parse errors after retries are exhausted", async () => {
await expect(
generateContract({
model: staticModel(["not json", "still not json"]),
schema: Profile,
prompt: "Extract the profile.",
retries: 1
})
).rejects.toBeInstanceOf(ContractParseError);
});
});
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