import chai = require("chai");
import * as requestValidators from "../../../../src/steps/http/validate-request";

const { expect } = chai;

describe("Request Validation functions", () => {
  describe("checkBodyExistence", () => {
    it("should return a promise", () => {
      //tslint:disable-next-line:no-empty
      const res = requestValidators.checkBodyExistence(<any>{}).catch(() => {});
      expect(res).to.be.instanceof(Promise);
    });

    it("should return a rejected promise if a POST request is missing a body", (done) => {
      const contextMock = { body: undefined, method: "post" };
      requestValidators.checkBodyExistence(<any>contextMock).then(() => {
        done(new Error("This fulfillment handler shoudn't run"));
      }, () => { done(); });
    });

    it("should return a rejected promise if a PATCH request is missing a body", (done) => {
      const contextMock = { body: undefined, method: "patch" };
      requestValidators.checkBodyExistence(<any>contextMock).then(() => {
        done(new Error("This fulfillment handler shoudn't run"));
      }, () => {done(); });
    });

    it("should return a rejected promise if a linkage DELETE request is missing a body", (done) => {
      const contextMock = {
        body: undefined,
        method: "delete",
        aboutRelationship: true,
        ext: []
      };

      requestValidators.checkBodyExistence(<any>contextMock).then(() => {
        done(new Error("This fulfillment handler shoudn't run"));
      }, () => {done(); });
    });

    it("should return a rejected promise if an unexpected body is present", (done) => {
      const contextMock = { body: {}, method: "get"};
      requestValidators.checkBodyExistence(<any>contextMock).then(() => {
        done(new Error("This fulfillment handler shoudn't run"));
      }, () => { done(); });
    });

    it("should resolve the promise successfully when expected body is present", (done) => {
      const contextMock = { body: {}, method: "patch"};
      requestValidators.checkBodyExistence(<any>contextMock)
        .then(() => { done() }, done);
    });

    it("should resolve the promise when body is expectedly absent", (done) => {
      const contextMock = { body: undefined, method: "get" };
      requestValidators.checkBodyExistence(<any>contextMock)
        .then(() => { done() }, done);
    });
  });
});