deleting a material is rejected if it is referenced by a sample

src/helpers/test.ts

@@ -1,90 +0,0 @@
-import supertest from 'supertest';
-import should from 'should/as-function';
-import db from "../db";
-
-
-export default class TestHelper {
-  public static auth = {
-    admin: {pass: 'Abc123!#', key: '000000000000000000001003'},
-    janedoe: {pass: 'Xyz890*)', key: '000000000000000000001002'},
-    user: {pass: 'Xyz890*)', key: '000000000000000000001001'}
-  }
-  public static res = {
-    400: {status: 'Bad request'},
-    401: {status: 'Unauthorized'},
-    403: {status: 'Forbidden'},
-    404: {status: 'Not found'},
-    500: {status: 'Internal server error'}
-  }
-
-  static before (done) {
-    process.env.port = '2999';
-    process.env.NODE_ENV = 'test';
-    db.connect('test', done);
-  }
-
-  static beforeEach (server, done) {
-    delete require.cache[require.resolve('../index')];  // prevent loading from cache
-    server = require('../index');
-    db.drop(err => {  // reset database
-      if (err) return done(err);
-      db.loadJson(require('../test/db.json'), done);
-    });
-    return server
-  }
-
-  static afterEach (server, done) {
-    server.close(done);
-  }
-
-  static request (server, done, options) {  // options in form: {method, url, auth: {key/basic: 'name' or 'key'/{name, pass}}, httpStatus, req, res}
-    let st = supertest(server);
-    if (options.hasOwnProperty('auth') && options.auth.hasOwnProperty('key')) {
-      options.url += '?key=' + (this.auth.hasOwnProperty(options.auth.key)? this.auth[options.auth.key].key : options.auth.key);
-    }
-    switch (options.method) {
-      case 'get':
-        st = st.get(options.url)
-        break;
-      case 'post':
-        st = st.post(options.url)
-        break;
-      case 'put':
-        st = st.put(options.url)
-        break;
-      case 'delete':
-        st = st.delete(options.url)
-        break;
-    }
-    if (options.hasOwnProperty('req')) {
-      st = st.send(options.req);
-    }
-    if (options.hasOwnProperty('auth') && options.auth.hasOwnProperty('basic')) {
-      if (this.auth.hasOwnProperty(options.auth.basic)) {
-        st = st.auth(options.auth.basic, this.auth[options.auth.basic].pass)
-      }
-      else {
-        st = st.auth(options.auth.basic.name, options.auth.basic.pass)
-      }
-    }
-    st = st.expect('Content-type', /json/)
-      .expect(options.httpStatus);
-    if (options.hasOwnProperty('res')) {
-      return st.end((err, res) => {
-        if (err) return done (err);
-        should(res.body).be.eql(options.res);
-        done();
-      });
-    }
-    else if (this.res.hasOwnProperty(options.httpStatus) && options.default !== false) {
-      return st.end((err, res) => {
-        if (err) return done (err);
-        should(res.body).be.eql(this.res[options.httpStatus]);
-        done();
-      });
-    }
-    else {
-      return st;
-    }
-  }
-}