Created getCountryByPhoneCode API

README.md

@@ -340,6 +340,16 @@ wcc.getCountryNeighbors(country)
 // Example: wcc.getCountryNeighbors('poland')
 ```
 
+```js
+/**
+ * Get list of countries by phoneCode
+ * @param {String} phoneCode - +91, +1 etc..
+ * @returns {Country[]}
+ */
+wcc.getCountryByPhoneCode(phoneCode)
+// Example: wcc.getCountryByPhoneCode('+91')
+```
+
 ❗️ All params are **NOT** case sensitive so no matter how argument looks,
 the response will remain the same.
 

index.js

@@ -266,6 +266,20 @@ const getCountryNeighbors = (country) => {
   return data.filter(({ neighbors }) => neighbors.includes(foundCountry.iso.alpha_2));
 };
 
+/**
+ * Get list of countries based on phone code
+ * @param {String} phoneCode - +91, +1 etc..
+ * @returns {Array}
+ */
+const getCountryByPhoneCode = function (phoneCode) {
+  if (getCountryByPhoneCode.length !== arguments.length) {
+    throw new Error("phoneCode is required");
+  } else if (typeof phoneCode !== "string") {
+    throw new Error("phoneCode must be a string");
+  }
+  return data.filter((eachCountry) => eachCountry.phone_code === phoneCode);
+};
+
 module.exports = {
   getRandomCountry,
   getNRandomCountriesData,
@@ -283,4 +297,5 @@ module.exports = {
   getCountriesByConstitutionalForm,
   getCountriesByLandLock,
   getCountryNeighbors,
+  getCountryByPhoneCode,
 };

spec/getCountriesSpec.js

@@ -271,4 +271,31 @@ describe("The index", () => {
       expect(() => countryApi.getCountryNeighbors('non-existing country')).toThrow();
     })
   });
+
+  describe("The getCountryByPhoneCode", () => {
+    const expectedCountryWithPhoneCode91 =
+      countryApi.getCountryByPhoneCode("+91");
+    const expectCountryWithPhoneCode1 = countryApi.getCountryByPhoneCode("+1");
+
+    it("returns countries where phone_code is '+91' ", () => {
+      expect(countryApi.getCountryByPhoneCode("+91")).toEqual(
+        expectedCountryWithPhoneCode91
+      );
+    });
+
+    it("returns countries where phone_code is '+1' ", () => {
+      expect(countryApi.getCountryByPhoneCode("+1")).toEqual(
+        expectCountryWithPhoneCode1
+      );
+    });
+
+    it("throws an error if passed argument(phoneCode) not a string", () => {
+      expect(() => countryApi.getCountryByPhoneCode(12)).toThrow();
+    });
+
+    it("throws an error if argument(phoneCode) not passed", () => {
+      expect(() => countryApi.getCountryByPhoneCode()).toThrow();
+    });
+  });
+
 });