Adds tests for the examples from README.md.

test/readme-examples.spec.js

@@ -0,0 +1,116 @@
+/* eslint-disable camelcase */
+import addressFormatter from '../src/index';
+
+describe('Examples from README.md', () => {
+  describe('Basic examples', () => {
+    it('first', () => {
+      const formatted = addressFormatter.format({
+        "houseNumber": 301,
+        "road": "Hamilton Avenue",
+        "neighbourhood": "Crescent Park",
+        "city": "Palo Alto",
+        "postcode": 94303,
+        "county": "Santa Clara County",
+        "state": "California",
+        "country": "United States of America",
+        "countryCode": "US",
+      });
+
+      expect(formatted).toBe(
+`301 Hamilton Avenue
+Palo Alto, CA 94303
+United States of America
+`);
+    });
+
+    it('second', () => {
+      const format = addressFormatter.format({
+        "houseNumber": 301,
+        "road": "Hamilton Avenue",
+        "neighbourhood": "Crescent Park",
+        "city": "Palo Alto",
+        "postcode": 94303,
+        "county": "Santa Clara County",
+        "state": "California",
+        "countryCode": "US",
+      }, {
+        appendCountry: true
+      });
+      expect(format).toBe(
+`301 Hamilton Avenue
+Palo Alto, CA 94303
+United States of America
+`
+      );
+    });
+  })
+
+  it('You can overwrite the country code incoming from the map service', () => {
+    const format = addressFormatter.format({
+      "houseNumber": 301,
+      "road": "Hamilton Avenue",
+      "neighbourhood": "Crescent Park",
+      "city": "Palo Alto",
+      "postcode": 94303,
+      "county": "Santa Clara County",
+      "state": "California",
+      "country": "United States of America",
+      "countryCode": "US",
+    }, {
+      abbreviate: true,
+      countryCode: 'UK'
+    });
+
+    expect(format).toBe(
+`301 Hamilton Ave
+Palo Alto 94303
+USA
+`
+    );
+  });
+
+  it('You can use a fallback to keep the library working when the country code is wrong', () => {
+    const format = addressFormatter.format({
+      "houseNumber": 301,
+      "road": "Hamilton Avenue",
+      "neighbourhood": "Crescent Park",
+      "city": "Palo Alto",
+      "postcode": 94303,
+      "county": "Santa Clara County",
+      "state": "California",
+      "country": "United States of America",
+      "countryCode": "yu",
+    }, {
+      abbreviate: true,
+      fallbackCountryCode: 'UK'
+    });
+    expect(format).toBe(
+`301 Hamilton Ave
+Palo Alto 94303
+USA
+`
+    );
+  });
+
+  it('You can get the address as a list of lines to make your formatting easier', () => {
+    const format = addressFormatter.format({
+      "houseNumber": 301,
+      "road": "Hamilton Avenue",
+      "neighbourhood": "Crescent Park",
+      "city": "Palo Alto",
+      "postcode": 94303,
+      "county": "Santa Clara County",
+      "state": "California",
+      "country": "United States of America",
+      "countryCode": "US",
+    }, {
+      output: 'array'
+    });
+
+    expect(format).toEqual([
+      '301 Hamilton Avenue',
+      'Palo Alto, CA 94303',
+      'United States of America'
+    ]);
+  });
+});