adding or replacing sort params for provider urls when necessary

test/queryStringMutator/queryStringMutator.test.js

@@ -0,0 +1,32 @@
+const testData = require('./testData.json');
+const expect = require('chai').expect;
+const fs = require('fs');
+
+const mutator = require('../../lib/services/queryStringMutator.js');
+const queryString = require('query-string');
+
+/**
+ * Test test might look a bit weird at first, but listen stranger...
+ * It's not wise to compare 2 urls, as this means all url params must be in the expected order. This is however not
+ * guaranteed, as params (and their order) are totally variable.
+ */
+describe('queryStringMutator', () => {
+  it('should fix all urls', () => {
+    let _provider = fs.readdirSync('./lib/provider/').map((integPath) => require(`../../lib/provider/${integPath}`));
+
+    for (let test of testData) {
+      const provider = _provider.find((p) => p.metaInformation.id === test.id);
+      if (provider == null) {
+        throw new Error(`Cannot find provider for given id: ${test.id}`);
+      }
+
+      const fixedUrl = mutator(test.url, provider.config.sortByDateParam);
+      const expectedParams = queryString.parseUrl(test.shouldBecome);
+      const actualParams = queryString.parseUrl(fixedUrl);
+
+      //check if all new params are existing
+      expect(Object.keys(expectedParams.query)).to.include.members(Object.keys(actualParams.query));
+      expect(Object.values(expectedParams.query)).to.include.members(Object.values(actualParams.query));
+    }
+  });
+});