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test: cover const, nullable type arrays, and enum generation
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Lines changed: 202 additions & 7 deletions

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‎__tests__/__snapshots__/nullables.test.ts.snap‎

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// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
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exports[`const values 1`] = `
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"export type StringConst = "hello";
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export type NumberConst = 42;
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export type BooleanConst = true;
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export type NullConst = null;
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"
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`;
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exports[`const values 2`] = `
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"import * as v from "valibot";
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export const stringConstSchema = v.literal("hello");
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export const numberConstSchema = v.literal(42);
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export const booleanConstSchema = v.literal(true);
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export const nullConstSchema = v.null();
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"
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`;
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exports[`nullables 1`] = `
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"export type MySchemaLolOrNullable = "lol" | "kek" | null;
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"
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`;
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exports[`top-level type array with null 1`] = `
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"export type NullableString = string | null;
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export type NullableStringEnum = "active" | "inactive" | null;
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export type NullableInteger = number | null;
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export type MultiType = string | number;
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"
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`;
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exports[`top-level type array with null 2`] = `
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"import * as v from "valibot";
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export const nullableStringSchema = v.nullable(v.string());
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export const nullableStringEnumSchema = v.nullable(v.picklist(["active", "inactive"]));
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export const nullableIntegerSchema = v.nullable(v.pipe(v.number(), v.integer()));
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export const multiTypeSchema = v.union([v.string(), v.number()]);
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"
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`;
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exports[`top-level type array with null 3`] = `
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"export const nullableStringEnum = ["active", "inactive"] as const;
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"
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`;

‎__tests__/fixtures/test1.json‎

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{
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"openapi": "3.0.3",
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"openapi": "3.1.0",
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"info": {
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"title": "Billing Service REST API",
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"version": "1.0.0"
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"maxLength": 256,
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"pattern": "/^[A-Z0-9]$/"
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},
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"ApiVersion": {
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"type": "string",
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"const": "2024-01-01",
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"description": "The API version"
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},
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"MaxRetries": {
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"type": "integer",
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"const": 3
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},
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"DefaultEnabled": {
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"const": true
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},
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"NullableNotes": {
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"type": ["string", "null"],
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"description": "Optional notes field"
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},
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"NullableDiscount": {
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"type": ["number", "null"]
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},
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"NullableStatus": {
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"type": ["string", "null"],
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"enum": ["active", "paused", "cancelled"]
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},
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"AccountTier": {
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"type": "string",
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"enum": ["free", "pro", "enterprise"]
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},
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"LongRunningOperationIndeterminate": {
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"type": "object",
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"additionalProperties": false,

‎__tests__/fixtures/test1/commands.ts‎

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*
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* WARN: Do not edit directly.
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*
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* Generated on 2026-03-17T13:15:38.356Z
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* Generated on 2026-04-02T04:52:00.193Z
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*
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*/
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/** eslint-disable max-classes */
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} from "./types.js";
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/**
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* Tagged template literal that applies encodeURIComponent to all interpolated values, protecting path integrity from characters like `/` and `#`.
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* Tagged template literal that applies encodeURIComponent to all interpolated
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* values, protecting path integrity from characters like `/` and `#`.
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* @example encodePath`/users/${userId}` // "/users/foo%2Fbar"
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*/
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function encodePath(

‎__tests__/fixtures/test1/enums.ts‎

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/**
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* This file was auto generated by @block65/openapi-codegen
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*
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* WARN: Do not edit directly.
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*
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* Generated on 2026-04-02T04:52:00.193Z
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*
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*/
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export const nullableStatus = ["active", "paused", "cancelled"] as const;
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export const accountTier = ["free", "pro", "enterprise"] as const;
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export const billingSubscriptionStatus = ["active", "inactive"] as const;
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export const billingSubscriptionInterval = ["monthly", "yearly"] as const;
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export const planSku = [
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"donotuse",
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"plasku1",
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"plasku2",
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"plasku3",
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"plasku4",
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] as const;
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export const paymentMethodBrand = [
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"amex",
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"diners",
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"discover",
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"jcb",
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"mastercard",
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"unionpay",
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"visa",
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"unknown",
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] as const;
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export const billingLocale = ["en"] as const;
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export const billingAccountType = ["standard", "agency", "reseller"] as const;
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export const currency = ["usd", "aud", "sgd", "myr", "gbp"] as const;
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export const billingAccountStatus = ["nominal", "delinquent"] as const;
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export const billingCountry = ["us", "au", "sg", "my", "gb"] as const;

‎__tests__/fixtures/test1/hono-valibot.ts‎

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*
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* WARN: Do not edit directly.
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*
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* Generated on 2026-03-17T13:15:38.356Z
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* Generated on 2026-04-02T04:52:00.193Z
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*
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*/
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‎__tests__/fixtures/test1/main.ts‎

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*
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* WARN: Do not edit directly.
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*
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* Generated on 2026-03-17T13:15:38.356Z
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* Generated on 2026-04-02T04:52:00.193Z
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*
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*/
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import {

‎__tests__/fixtures/test1/types.ts‎

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*
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* WARN: Do not edit directly.
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*
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* Generated on 2026-03-17T13:15:38.356Z
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* Generated on 2026-04-02T04:52:00.193Z
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*
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*/
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import type { Jsonifiable, Jsonify } from "type-fest";
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export type PromoCode = string;
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/** The API version */
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export type ApiVersion = "2024-01-01";
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export type MaxRetries = 3;
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export type DefaultEnabled = true;
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/** Optional notes field */
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export type NullableNotes = string | null;
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export type NullableDiscount = number | null;
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export type NullableStatus = "active" | "paused" | "cancelled" | null;
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export type AccountTier = "free" | "pro" | "enterprise";
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export type StripeId = string;
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export type DateTime = Jsonify<Date>;
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export type BillingSubscriptionStatus = "active" | "inactive";

‎__tests__/fixtures/test1/valibot.ts‎

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*
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* WARN: Do not edit directly.
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*
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* Generated on 2026-03-17T13:15:38.356Z
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* Generated on 2026-04-02T04:52:00.193Z
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*
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*/
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import * as v from "valibot";
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v.maxLength(256),
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v.regex(/\/^[A-Z0-9]$\//),
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);
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/** The API version */
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export const apiVersionSchema = v.literal("2024-01-01");
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export const maxRetriesSchema = v.literal(3);
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export const defaultEnabledSchema = v.literal(true);
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/** Optional notes field */
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export const nullableNotesSchema = v.nullable(v.string());
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export const nullableDiscountSchema = v.nullable(v.number());
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export const nullableStatusSchema = v.nullable(
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v.picklist(["active", "paused", "cancelled"]),
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);
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export const accountTierSchema = v.picklist(["free", "pro", "enterprise"]);
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export const stripeIdSchema = v.pipe(
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v.string(),
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v.minLength(11),

‎__tests__/nullables.test.ts‎

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expect(result.typesFile.getText()).toMatchSnapshot();
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});
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test("top-level type array with null", async () => {
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const result = await processOpenApiDocument(
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"/tmp/like-you-know-whatever",
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{
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openapi: "3.1.0",
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info: {
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title: "Test",
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version: "1.0.0",
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},
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paths: {},
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components: {
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schemas: {
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NullableString: {
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type: ["string", "null"],
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},
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NullableStringEnum: {
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type: ["string", "null"],
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enum: ["active", "inactive"],
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},
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NullableInteger: {
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type: ["integer", "null"],
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},
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MultiType: {
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type: ["string", "number"],
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},
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},
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},
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},
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[],
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);
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expect(result.typesFile.getText()).toMatchSnapshot();
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expect(result.valibotFile?.getText()).toMatchSnapshot();
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expect(result.enumsFile.getText()).toMatchSnapshot();
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});
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test("const values", async () => {
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const result = await processOpenApiDocument(
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"/tmp/like-you-know-whatever",
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{
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openapi: "3.1.0",
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info: {
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title: "Test",
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version: "1.0.0",
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},
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paths: {},
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components: {
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schemas: {
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StringConst: {
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type: "string",
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const: "hello",
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},
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NumberConst: {
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type: "integer",
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const: 42,
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},
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BooleanConst: {
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const: true,
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},
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NullConst: {
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const: null,
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},
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},
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},
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},
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[],
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);
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expect(result.typesFile.getText()).toMatchSnapshot();
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expect(result.valibotFile?.getText()).toMatchSnapshot();
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});

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