30 lines
2.4 KiB
TypeScript
30 lines
2.4 KiB
TypeScript
/** Minimal assertions for the imported Ultimate cases, without Node or Vitest. */
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export const cases: {name:string;run:()=>any}[]=[]
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export const it=(name:string,run:()=>any)=>cases.push({name,run})
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export const describe=(_name:string,run:()=>any)=>run()
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export const cleanups: (()=>any)[]=[]
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export const afterEach=(run:()=>any)=>cleanups.push(run)
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expect.objectContaining=(value:any)=>({__object:true,value})
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expect.stringContaining=(value:string)=>({__string:true,value})
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export const assert=(value:any,message:string)=>{if(!value)throw new Error(message)}
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const same=(a:any,b:any):boolean=>b?.__object || b?.__string ? subset(a,b) : b?.__contains ? b.values.every((v:any)=>a.includes(v)) : Array.isArray(b) ? Array.isArray(a)&&a.length===b.length&&b.every((v:any,i:number)=>same(a[i],v)) : b&&typeof b==='object' ? a&&Object.keys(a).length===Object.keys(b).length&&Object.entries(b).every(([k,v])=>same(a[k],v)) : a===b
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const subset=(a:any,b:any):boolean=>b?.__object ? subset(a,b.value) : b?.__string ? a.includes(b.value) : b && typeof b==='object' ? Object.entries(b).every(([k,v])=>subset(a?.[k],v)) : a===b
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export function expect(value:any,negate=false):any {
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const check=(ok:boolean)=>assert(negate?!ok:ok,`Expected ${String(value)}${negate?' not':''} to match`)
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const result:any={
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toBe:(b:any)=>check(value===b),toEqual:(b:any)=>check(same(value,b)),toHaveLength:(n:number)=>check(value.length===n),
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toMatchObject:(b:any)=>check(subset(value,b)),toMatch:(b:RegExp)=>check(b.test(value)),toContain:(b:any)=>check(value.includes(b)),
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toBeUndefined:()=>check(value===undefined),toBeDefined:()=>check(value!==undefined),toBeGreaterThanOrEqual:(b:number)=>check(value>=b),
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toThrow:(b:any)=>{let error;try{value()}catch(e){error=e}check(error!==undefined && (b instanceof RegExp?b.test(String(error)):String(error).includes(b)))},
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}
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Object.defineProperty(result,'not',{get:()=>expect(value,!negate)})
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Object.defineProperty(result,'rejects',{get:()=>({toThrow:async(b:string)=>{let error;try{await value}catch(e){error=e}check(error!==undefined&&String(error).includes(b))}})})
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return result
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}
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expect.arrayContaining=(values:any[])=>({__contains:true,values})
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export async function until(condition:()=>any) {
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const deadline=Date.now()+5000
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while(!await condition()) {assert(Date.now()<deadline,'Condition deadline');await new Promise(resolve=>setTimeout(resolve,0))}
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}
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export const setImmediate=(callback:any)=>setTimeout(callback,0)
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