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import { subst } from '../src';import { expect } from 'chai';
describe('subst', () => {
  it('Returns empty string if the template is empty and there are no params', () => {    const expected = '';    const actual = subst('', {});    expect(actual).to.equal(expected);  });
  it('Returns empty string if the template is empty but a param is passed', () => {    const expected = '';    const actual = subst('', { p: 1 });    expect(actual).to.equal(expected);  });
  it('Substitutes all params present in the object passed', () => {    const expected = '/1/a/false';    const actual = subst('/:p/:q/:r', { p: 1, q: 'a', r: false });    expect(actual).to.equal(expected);  });
  it('Allows parameters at the beginning of the template', () => {    const expected = '42';    const actual = subst(':p', { p: 42 });    expect(actual).to.equal(expected);  });
  it('Renders boolean (true) params', () => {    const expected = 'true';    const actual = subst(':p', { p: true });    expect(actual).to.equal(expected);  });
  it('Renders boolean (false) params', () => {    const expected = 'false';    const actual = subst(':p', { p: false });    expect(actual).to.equal(expected);  });
  it('Renders string params', () => {    const expected = 'test';    const actual = subst(':p', { p: 'test' });    expect(actual).to.equal(expected);  });
  it('Renders number params', () => {    const expected = '234';    const actual = subst(':p', { p: 234 });    expect(actual).to.equal(expected);  });
  it('Throws if a param is an array', () => {    expect(() => subst(':p', { p: [] }))      .to.throw(TypeError, "Path parameter p cannot be of type object. Allowed types are: boolean, string, number.");  });
  it('Throws if a param is an object', () => {    expect(() => subst(':p', { p: {} }))      .to.throw(TypeError, "Path parameter p cannot be of type object. Allowed types are: boolean, string, number.");  });
  it('Throws if a param is a symbol', () => {    expect(() => subst(':p', { p: Symbol() }))      .to.throw(TypeError, "Path parameter p cannot be of type symbol. Allowed types are: boolean, string, number.");  });
  it('Throws if a param is missing', () => {    expect(() => subst(':p', {})).to.throw();  });});