loopback-component-explorer/test/route-helper.test.js

'use strict';

var routeHelper = require('../lib/route-helper');
var expect = require('chai').expect;
var _defaults = require('lodash.defaults');

describe('route-helper', function() {
  it('returns "object" when a route has multiple return values', function() {
    var doc = createAPIDoc({
      returns: [
        { arg: 'max', type: 'number' },
        { arg: 'min', type: 'number' },
        { arg: 'avg', type: 'number' }
      ]
    });
    expect(doc.operations[0].type).to.equal(undefined);
    expect(getResponseType(doc.operations[0])).to.equal('object');
  });

  it('converts path params when they exist in the route name', function() {
    var doc = createAPIDoc({
      accepts: [
        {arg: 'id', type: 'string'}
      ],
      path: '/test/:id'
    });
    var paramDoc = doc.operations[0].parameters[0];
    expect(paramDoc.paramType).to.equal('path');
    expect(paramDoc.name).to.equal('id');
    expect(paramDoc.required).to.equal(false);
  });

  // FIXME need regex in routeHelper.acceptToParameter
  xit('won\'t convert path params when they don\'t exist in the route name', function() {
    var doc = createAPIDoc({
      accepts: [
        {arg: 'id', type: 'string'}
      ],
      path: '/test/:identifier'
    });
    var paramDoc = doc.operations[0].parameters[0];
    expect(paramDoc.paramType).to.equal('query');
  });

  it('correctly coerces param types', function() {
    var doc = createAPIDoc({
      accepts: [
        {arg: 'binaryData', type: 'buffer'}
      ]
    });
    var paramDoc = doc.operations[0].parameters[0];
    expect(paramDoc.paramType).to.equal('query');
    expect(paramDoc.type).to.equal('string');
    expect(paramDoc.format).to.equal('byte');
  });

  it('correctly converts return types (arrays)', function() {
    var doc = createAPIDoc({
      returns: [
        {arg: 'data', type: ['customType']}
      ]
    });
    var opDoc = doc.operations[0];
    // Note: swagger-ui treat arrays of X the same way as object X
    expect(getResponseType(opDoc)).to.equal('customType');

    // NOTE(bajtos) this would be the case if there was a single response type
    // expect(opDoc.type).to.equal('array');
    // expect(opDoc.items).to.eql({type: 'customType'});
  });

  it('includes `notes` metadata', function() {
    var doc = createAPIDoc({
      notes: 'some notes'
    });
    expect(doc.operations[0].notes).to.equal('some notes');
  });

  it('includes `deprecated` metadata', function() {
    var doc = createAPIDoc({
      deprecated: 'true'
    });
    expect(doc.operations[0].deprecated).to.equal('true');
  });

  it('joins array description/summary', function() {
    var doc = createAPIDoc({
      description: [ 'line1', 'line2' ]
    });
    expect(doc.operations[0].summary).to.equal('line1\nline2');
  });

  it('joins array notes', function() {
    var doc = createAPIDoc({
      notes: [ 'line1', 'line2' ]
    });
    expect(doc.operations[0].notes).to.equal('line1\nline2');
  });

  it('joins array description/summary of an input arg', function() {
    var doc = createAPIDoc({
      accepts: [{ name: 'arg', description: [ 'line1', 'line2' ] }]
    });
    expect(doc.operations[0].parameters[0].description).to.equal('line1\nline2');
  });

  it('correctly does not include context params', function() {
    var doc = createAPIDoc({
      accepts: [
        {arg: 'ctx', http: {source: 'context'}}
      ],
      path: '/test'
    });
    var params = doc.operations[0].parameters;
    expect(params.length).to.equal(0);
  });

  it('correctly does not include request params', function() {
    var doc = createAPIDoc({
      accepts: [
        {arg: 'req', http: {source: 'req'}}
      ],
      path: '/test'
    });
    var params = doc.operations[0].parameters;
    expect(params.length).to.equal(0);
  });

  it('correctly does not include response params', function() {
    var doc = createAPIDoc({
      accepts: [
        {arg: 'res', http: {source: 'res'}}
      ],
      path: '/test'
    });
    var params = doc.operations[0].parameters;
    expect(params.length).to.equal(0);
  });

  it('preserves `enum` accepts arg metadata', function() {
    var doc = createAPIDoc({
      accepts: [{ name: 'arg', type: 'number', enum: [1,2,3] }]
    });
    expect(doc.operations[0].parameters[0])
      .to.have.property('enum').eql([1,2,3]);
  });

  it('includes the default response message with code 200', function() {
    var doc = createAPIDoc({
      returns: [{ name: 'result', type: 'object', root: true }]
    });
    expect(doc.operations[0].responseMessages).to.eql([
      {
        code: 200,
        message: 'Request was successful',
        responseModel: 'object'
      }
    ]);
  });

  it('uses the response code 204 when `returns` is empty', function() {
    var doc = createAPIDoc({
      returns: []
    });
    expect(doc.operations[0].responseMessages).to.eql([
      {
        code: 204,
        message: 'Request was successful',
        responseModel: 'void'
      }
    ]);
  });

  it('includes custom error response in `responseMessages`', function() {
    var doc = createAPIDoc({
      errors: [{
        code: 422,
        message: 'Validation failed',
        responseModel: 'ValidationError'
      }]
    });
    expect(doc.operations[0].responseMessages[1]).to.eql({
      code: 422,
      message: 'Validation failed',
      responseModel: 'ValidationError'
    });
  });
});

// Easy wrapper around createRoute
function createAPIDoc(def) {
  return routeHelper.routeToAPIDoc(_defaults(def, {
    path: '/test',
    verb: 'GET',
    method: 'test.get'
  }));
}

function getResponseType(operationDoc) {
  return operationDoc.responseMessages[0].responseModel;
}