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exact.ts
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exact.ts
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import type {Exact} from '../index';
{ // Spec - string type
type Type = string;
const fn = <T extends Exact<Type, T>>(args: T) => args;
{ // It should accept string
const input = '';
fn(input);
}
{ // It should reject number
const input = 1;
// @ts-expect-error
fn(input);
}
{ // It should reject object
const input = {};
// @ts-expect-error
fn(input);
}
}
{ // Spec - array
type Type = Array<{code: string; name?: string}>;
const fn = <T extends Exact<Type, T>>(args: T) => args;
{ // It should accept array with required property only
const input = [{code: ''}];
fn(input);
}
{ // It should reject readonly array
const input = [{code: ''}] as ReadonlyArray<{code: string}>;
// @ts-expect-error
fn(input);
}
{ // It should accept array with optional property
const input = [{code: '', name: ''}];
fn(input);
}
{ // It should reject array with excess property
const input = [{code: '', name: '', excessProperty: ''}];
// @ts-expect-error
fn(input);
}
{ // It should reject invalid type
const input = '';
// @ts-expect-error
fn(input);
}
}
{ // Spec - readonly array
type Type = ReadonlyArray<{code: string; name?: string}>;
const fn = <T extends Exact<Type, T>>(args: T) => args;
{ // It should accept array with required property only
const input = [{code: ''}];
fn(input);
}
{ // It should accept readonly array
const input = [{code: ''}] as ReadonlyArray<{code: string}>;
fn(input);
}
{ // It should accept array with optional property
const input = [{code: '', name: ''}];
fn(input);
}
{ // It should reject array with excess property
const input = [{code: '', name: '', excessProperty: ''}];
// @ts-expect-error
fn(input);
}
{ // It should reject invalid type
const input = '';
// @ts-expect-error
fn(input);
}
}
{ // Spec - object
type Type = {code: string; name?: string};
const fn = <T extends Exact<Type, T>>(args: T) => args;
{ // It should accept object with required property only
const input = {code: ''};
fn(input);
}
{ // It should accept object with optional property
const input = {code: '', name: ''};
fn(input);
}
{ // It should reject object with excess property
const input = {code: '', name: '', excessProperty: ''};
// @ts-expect-error
fn(input);
}
{ // It should reject invalid type
const input = '';
// @ts-expect-error
fn(input);
}
}
{ // Spec - union - only object
type Type = {code: string} | {name: string};
const fn = <T extends Exact<Type, T>>(args: T) => args;
{ // It should accept type a
const input = {code: ''};
fn(input);
}
{ // It should accept type b
const input = {name: ''};
fn(input);
}
{ // It should reject intersection
const input = {name: '', code: ''};
// @ts-expect-error
fn(input);
}
}
{ // Spec - union - mixture object/primitive
type Type = {code: string} | string;
const fn = <T extends Exact<Type, T>>(args: T) => args;
{ // It should accept type a
const input = {code: ''};
fn(input);
}
{ // It should accept type b
const input = '';
fn(input);
}
{ // It should reject intersection
const input = {name: '', code: ''};
// @ts-expect-error
fn(input);
}
}
{ // Spec - jsonschema2ts generated request type with additionalProperties: true
type Type = {
body: {
[k: string]: unknown;
code: string;
name?: string;
};
};
const fn = <T extends Exact<Type, T>>(args: T) => args;
{ // It should accept input with required property only
const input = {body: {code: ''}};
fn(input);
}
{ // It should accept input with optional property
const input = {body: {code: '', name: ''}};
fn(input);
}
{ // It should allow input with excess property
const input = {body: {code: '', name: '', excessProperty: ''}};
fn(input);
}
}
{ // Spec - union of array
type Type = Array<{x: string}> & Array<{z: number}>;
const fn = <T extends Exact<Type, T>>(args: T) => args;
{ // It should accept valid input
const input = [{
x: '',
z: 1,
}];
fn(input);
}
{ // It should reject missing field
const input = [{
z: 1,
}];
// @ts-expect-error
fn(input);
}
{ // It should reject missing field
const input = [{
x: '',
}];
// @ts-expect-error
fn(input);
}
{ // It should reject incorrect type
const input = [{
x: 1,
z: 1,
}];
// @ts-expect-error
fn(input);
}
{ // It should reject excess field
const input = [{
x: '',
y: '',
z: 1,
}];
// @ts-expect-error
fn(input);
}
}
{ // Spec - union of readonly array + non readonly array
type Type = ReadonlyArray<{x: string}> & Array<{z: number}>;
const fn = <T extends Exact<Type, T>>(args: T) => args;
{ // It should accept valid input
const input = [{
x: '',
z: 1,
}];
fn(input);
}
{ // It should reject missing field
const input = [{
z: 1,
}];
// @ts-expect-error
fn(input);
}
{ // It should reject missing field
const input = [{
x: '',
}];
// @ts-expect-error
fn(input);
}
{ // It should reject incorrect type
const input = [{
x: 1,
z: 1,
}];
// @ts-expect-error
fn(input);
}
{ // It should reject excess field
const input = [{
x: '',
y: '',
z: 1,
}];
// @ts-expect-error
fn(input);
}
}
{ // Spec - union of array with nested fields
type Type = Array<{x: string}> & Array<{z: number; d: {e: string; f: boolean}}>;
const fn = <T extends Exact<Type, T>>(args: T) => args;
{ // It should accept valid input
const input = [{
x: '',
z: 1,
d: {
e: 'test',
f: true,
},
}];
fn(input);
}
{ // It should reject excess field
const input = [{
x: '',
z: 1,
d: {
e: 'test',
f: true,
g: '', // Excess field
},
}];
// @ts-expect-error
fn(input);
}
{ // It should reject missing field
const input = [{
x: '',
z: 1,
d: {
e: 'test',
// Missing f: boolean
},
}];
// @ts-expect-error
fn(input);
}
{ // It should reject missing field
const input = [{
x: '',
z: 1,
d: {
e: 'test',
f: '', // Type mismatch
},
}];
// @ts-expect-error
fn(input);
}
}