diff --git a/package.json b/package.json
index d2b95fe..8550cc4 100644
--- a/package.json
+++ b/package.json
@@ -47,23 +47,8 @@
     "typescript": "^3.0"
   },
   "jest": {
-    "testEnvironment": "node",
+    "preset": "ts-jest",
     "coverageDirectory": "./coverage",
-    "collectCoverage": true,
-    "moduleFileExtensions": [
-      "ts",
-      "js"
-    ],
-    "transform": {
-      "^.+\\.ts$": "ts-jest"
-    },
-    "globals": {
-      "ts-jest": {
-        "tsConfigFile": "tsconfig.json"
-      }
-    },
-    "testMatch": [
-      "**/__tests__/*.+(ts)"
-    ]
+    "collectCoverage": true
   }
 }
diff --git a/src/__snapshots__/index.spec.ts.snap b/src/__snapshots__/index.spec.ts.snap
new file mode 100644
index 0000000..07e623f
--- /dev/null
+++ b/src/__snapshots__/index.spec.ts.snap
@@ -0,0 +1,119 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`transform should be transformed 1`] = `
+Object {
+  "app_id": "angry-birds",
+  "br_features_flash": false,
+  "br_features_pdf": true,
+  "collector_tstamp": "2013-11-26T00:02:05Z",
+  "contexts_com_snowplowanalytics_snowplow_ua_parser_context_1": Array [
+    Object {
+      "deviceFamily": "Other",
+      "osFamily": "Windows XP",
+      "osMajor": null,
+      "osMinor": null,
+      "osPatch": null,
+      "osPatchMinor": null,
+      "osVersion": "Windows XP",
+      "useragentFamily": "IE",
+      "useragentMajor": "7",
+      "useragentMinor": "0",
+      "useragentPatch": null,
+      "useragentVersion": "IE 7.0",
+    },
+  ],
+  "contexts_org_schema_web_page_1": Array [
+    Object {
+      "author": "Fred Blundun",
+      "breadcrumb": Array [
+        "blog",
+        "releases",
+      ],
+      "datePublished": "2014-11-06T00:00:00Z",
+      "genre": "blog",
+      "inLanguage": "en-US",
+      "keywords": Array [
+        "snowplow",
+        "javascript",
+        "tracker",
+        "event",
+      ],
+    },
+  ],
+  "contexts_org_w3_performance_timing_1": Array [
+    Object {
+      "connectEnd": 1415358090183,
+      "connectStart": 1415358090103,
+      "domComplete": 0,
+      "domContentLoadedEventEnd": 1415358091309,
+      "domContentLoadedEventStart": 1415358090968,
+      "domInteractive": 1415358090886,
+      "domLoading": 1415358090270,
+      "domainLookupEnd": 1415358090102,
+      "domainLookupStart": 1415358090102,
+      "fetchStart": 1415358089870,
+      "loadEventEnd": 0,
+      "loadEventStart": 0,
+      "navigationStart": 1415358089861,
+      "redirectEnd": 0,
+      "redirectStart": 0,
+      "requestStart": 1415358090183,
+      "responseEnd": 1415358090265,
+      "responseStart": 1415358090265,
+      "unloadEventEnd": 1415358090287,
+      "unloadEventStart": 1415358090270,
+    },
+  ],
+  "derived_tstamp": "2013-11-26T00:03:57.886Z",
+  "domain_sessionid": "2b15e5c8-d3b1-11e4-b9d6-1681e6b88ec1",
+  "domain_sessionidx": 3,
+  "domain_userid": "bc2e92ec6c204a14",
+  "dvce_created_tstamp": "2013-11-26T00:03:57.885Z",
+  "etl_tstamp": "2017-01-26T00:01:25.292Z",
+  "event": "page_view",
+  "event_fingerprint": "e3dbfa9cca0412c3d4052863cefb547f",
+  "event_format": "jsonschema",
+  "event_id": "c6ef3124-b53a-4b13-a233-0088f79dcbcb",
+  "event_name": "link_click",
+  "event_vendor": "com.snowplowanalytics.snowplow",
+  "event_version": "1-0-0",
+  "geo_city": "New York",
+  "geo_country": "US",
+  "geo_latitude": 37.443604,
+  "geo_location": "37.443604,-122.4124",
+  "geo_longitude": -122.4124,
+  "geo_region": "TX",
+  "geo_region_name": "Florida",
+  "geo_zipcode": "94109",
+  "ip_domain": "nuvox.net",
+  "ip_isp": "FDN Communications",
+  "ip_netspeed": "Cable/DSL",
+  "ip_organization": "Bouygues Telecom",
+  "name_tracker": "cloudfront-1",
+  "network_userid": "ecdff4d0-9175-40ac-a8bb-325c49733607",
+  "page_title": "On Analytics",
+  "page_url": "http://www.snowplowanalytics.com",
+  "page_urlfragment": "4-conclusion",
+  "page_urlhost": "www.snowplowanalytics.com",
+  "page_urlpath": "/product/index.html",
+  "page_urlport": 80,
+  "page_urlquery": "id=GTM-DLRG",
+  "page_urlscheme": "http",
+  "platform": "web",
+  "true_tstamp": "2013-11-26T00:03:57.886Z",
+  "txn_id": 41828,
+  "unstruct_event_com_snowplowanalytics_snowplow_link_click_1": Object {
+    "elementClasses": Array [
+      "foreground",
+    ],
+    "elementId": "exampleLink",
+    "targetUrl": "http://www.example.com",
+  },
+  "user_fingerprint": "2161814971",
+  "user_id": "jon.doe@email.com",
+  "user_ipaddress": "92.231.54.234",
+  "v_collector": "clj-tomcat-0.1.0",
+  "v_etl": "serde-0.5.2",
+  "v_tracker": "js-2.1.0",
+}
+`;
diff --git a/src/__tests__/types.test.ts b/src/__tests__/types.test.ts
deleted file mode 100644
index dab511e..0000000
--- a/src/__tests__/types.test.ts
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * Copyright (c) 2018-2019 dokmic, Snowplow Analytics Ltd. All rights reserved.
- *
- * This program is licensed to you under the Apache License Version 2.0,
- * and you may not use this file except in compliance with the Apache License Version 2.0.
- * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the Apache License Version 2.0 is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
- */
-
-import * as Types from '../types';
-
-it('should parse string', () => {
-  expect(Types.String('key', 'value')).toEqual([{ key: 'key', value: 'value' }]);
-});
-
-it('should parse integer', () => {
-  expect(Types.Integer('key', '123.456')).toEqual([{ key: 'key', value: 123 }]);
-  expect(() => Types.Integer('key', 'string')).toThrow();
-});
-
-it('should parse float', () => {
-  expect(Types.Double('key', '123.456')).toEqual([{ key: 'key', value: 123.456 }]);
-  expect(() => Types.Double('key', 'string')).toThrow();
-});
-
-it('should parse boolean', () => {
-  expect(Types.Boolean('key', '0')).toEqual([{ key: 'key', value: false }]);
-  expect(Types.Boolean('key', '1')).toEqual([{ key: 'key', value: true }]);
-  expect(() => Types.Boolean('key', '2')).toThrow();
-});
-
-it('should parse timestamp', () => {
-  expect(Types.Timestamp('key', '2017-01-11 10:20:17')).toEqual([{ key: 'key', value: '2017-01-11T10:20:17Z' }]);
-});
-
-it('should parse contexts', () => {
-  expect(Types.Contexts('', JSON.stringify({
-    data: [
-      {
-        data: { unique: true },
-        schema: 'iglu:com.acme/unduplicated/jsonschema/1-0-0',
-      },
-      {
-        data: { value: 1 },
-        schema: 'iglu:com.acme/duplicated/jsonschema/1-0-0',
-      },
-      {
-        data: { value: 2 },
-        schema: 'iglu:com.acme/duplicated/jsonschema/1-0-0',
-      },
-    ],
-    schema: 'iglu:com.snowplowanalytics.snowplow/contexts/jsonschema/1-0-0',
-  }))).toEqual([
-    {
-      key: 'contexts_com_acme_unduplicated_1',
-      value: [
-        { unique: true },
-      ],
-    },
-    {
-      key: 'contexts_com_acme_duplicated_1',
-      value: [
-        { value: 1 },
-        { value: 2 },
-      ],
-    },
-  ]);
-});
-
-it('should parse unstruct', () => {
-  expect(Types.Unstruct('', JSON.stringify({
-    data: {
-      data: { key: 'value' },
-      schema: 'iglu:com.snowplowanalytics.snowplow/link_click/jsonschema/1-0-1',
-    },
-    schema: 'iglu:com.snowplowanalytics.snowplow/unstruct_event/jsonschema/1-0-0',
-  }))).toEqual([{
-    key: 'unstruct_event_com_snowplowanalytics_snowplow_link_click_1',
-    value: { key: 'value' },
-  }]);
-
-  expect(() => Types.Unstruct('', JSON.stringify({
-    schema: 'iglu:com.snowplowanalytics.snowplow/unstruct_event/jsonschema/1-0-0',
-    data: {},
-  }))).toThrow();
-});
-
-it('should fail on schema', () => {
-  expect(() => Types.Unstruct('', JSON.stringify({
-    data: {
-      data: { key: 'value' },
-      schema: 'something',
-    },
-    schema: 'iglu:com.snowplowanalytics.snowplow/unstruct_event/jsonschema/1-0-0',
-  }))).toThrow();
-});
diff --git a/src/__tests__/index.test.ts b/src/index.fixture.ts
similarity index 56%
rename from src/__tests__/index.test.ts
rename to src/index.fixture.ts
index 32f7f7f..2a16d29 100644
--- a/src/__tests__/index.test.ts
+++ b/src/index.fixture.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019 dokmic, Snowplow Analytics Ltd. All rights reserved.
+ * Copyright (c) 2019 dokmic, Snowplow Analytics Ltd. All rights reserved.
  *
  * This program is licensed to you under the Apache License Version 2.0,
  * and you may not use this file except in compliance with the Apache License Version 2.0.
@@ -10,20 +10,8 @@
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
  */
-import { transform } from '../index';
 
-const unstruct = JSON.stringify({
-  schema: 'iglu:com.snowplowanalytics.snowplow/contexts/jsonschema/1-0-0',
-  data: {
-    schema: 'iglu:com.snowplowanalytics.snowplow/link_click/jsonschema/1-0-1',
-    data: {
-      targetUrl: 'http://www.example.com',
-      elementClasses: ['foreground'],
-      elementId: 'exampleLink',
-    },
-  },
-});
-const contexts = JSON.stringify({
+const contexts = {
   schema: 'iglu:com.snowplowanalytics.snowplow/contexts/jsonschema/1-0-0',
   data: [
     {
@@ -63,8 +51,9 @@ const contexts = JSON.stringify({
       },
     },
   ],
-});
-const derivedContexts = JSON.stringify({
+};
+
+const derivedContexts = {
   schema: 'iglu:com.snowplowanalytics.snowplow\/contexts\/jsonschema\/1-0-1',
   data: [{
     schema: 'iglu:com.snowplowanalytics.snowplow\/ua_parser_context\/jsonschema\/1-0-0',
@@ -81,11 +70,23 @@ const derivedContexts = JSON.stringify({
       osPatchMinor: null,
       osVersion: 'Windows XP',
       deviceFamily: 'Other',
-    },
+    } as any,
   }],
-});
-const event = {
-  contexts,
+};
+
+const unstructEvent = {
+  schema: 'iglu:com.snowplowanalytics.snowplow/contexts/jsonschema/1-0-0',
+  data: {
+    schema: 'iglu:com.snowplowanalytics.snowplow/link_click/jsonschema/1-0-1',
+    data: {
+      targetUrl: 'http://www.example.com',
+      elementClasses: ['foreground'],
+      elementId: 'exampleLink',
+    },
+  },
+};
+
+export const event = {
   app_id: 'angry-birds',
   platform: 'web',
   etl_tstamp: '2017-01-26 00:01:25.292',
@@ -138,12 +139,13 @@ const event = {
   mkt_term: '',
   mkt_content: '',
   mkt_campaign: '',
+  contexts: JSON.stringify(contexts),
   se_category: '',
   se_action: '',
   se_label: '',
   se_property: '',
   se_value: '',
-  unstruct_event: unstruct,
+  unstruct_event: JSON.stringify(unstructEvent),
   tr_orderid: '',
   tr_affiliation: '',
   tr_total: '',
@@ -207,7 +209,7 @@ const event = {
   dvce_sent_tstamp: '',
   refr_domain_userid: '',
   refr_device_tstamp: '',
-  derived_contexts: derivedContexts,
+  derived_contexts: JSON.stringify(derivedContexts),
   domain_sessionid: '2b15e5c8-d3b1-11e4-b9d6-1681e6b88ec1',
   derived_tstamp: '2013-11-26 00:03:57.886',
   event_vendor: 'com.snowplowanalytics.snowplow',
@@ -217,142 +219,3 @@ const event = {
   event_fingerprint: 'e3dbfa9cca0412c3d4052863cefb547f',
   true_tstamp: '2013-11-26 00:03:57.886',
 };
-const expected = {
-  geo_location: '37.443604,-122.4124',
-  app_id: 'angry-birds',
-  platform: 'web',
-  etl_tstamp: '2017-01-26T00:01:25.292Z',
-  collector_tstamp: '2013-11-26T00:02:05Z',
-  dvce_created_tstamp: '2013-11-26T00:03:57.885Z',
-  event: 'page_view',
-  event_id: 'c6ef3124-b53a-4b13-a233-0088f79dcbcb',
-  txn_id: 41828,
-  name_tracker: 'cloudfront-1',
-  v_tracker: 'js-2.1.0',
-  v_collector: 'clj-tomcat-0.1.0',
-  v_etl: 'serde-0.5.2',
-  user_id: 'jon.doe@email.com',
-  user_ipaddress: '92.231.54.234',
-  user_fingerprint: '2161814971',
-  domain_userid: 'bc2e92ec6c204a14',
-  domain_sessionidx: 3,
-  network_userid: 'ecdff4d0-9175-40ac-a8bb-325c49733607',
-  geo_country: 'US',
-  geo_region: 'TX',
-  geo_city: 'New York',
-  geo_zipcode: '94109',
-  geo_latitude: 37.443604,
-  geo_longitude: -122.4124,
-  geo_region_name: 'Florida',
-  ip_isp: 'FDN Communications',
-  ip_organization: 'Bouygues Telecom',
-  ip_domain: 'nuvox.net',
-  ip_netspeed: 'Cable/DSL',
-  page_url: 'http://www.snowplowanalytics.com',
-  page_title: 'On Analytics',
-  page_urlscheme: 'http',
-  page_urlhost: 'www.snowplowanalytics.com',
-  page_urlport: 80,
-  page_urlpath: '/product/index.html',
-  page_urlquery: 'id=GTM-DLRG',
-  page_urlfragment: '4-conclusion',
-  contexts_org_schema_web_page_1: [{
-    genre: 'blog',
-    inLanguage: 'en-US',
-    datePublished: '2014-11-06T00:00:00Z',
-    author: 'Fred Blundun',
-    breadcrumb: ['blog', 'releases'],
-    keywords: ['snowplow', 'javascript', 'tracker', 'event'],
-  }],
-  contexts_org_w3_performance_timing_1: [{
-    navigationStart: 1415358089861,
-    unloadEventStart: 1415358090270,
-    unloadEventEnd: 1415358090287,
-    redirectStart: 0,
-    redirectEnd: 0,
-    fetchStart: 1415358089870,
-    domainLookupStart: 1415358090102,
-    domainLookupEnd: 1415358090102,
-    connectStart: 1415358090103,
-    connectEnd: 1415358090183,
-    requestStart: 1415358090183,
-    responseStart: 1415358090265,
-    responseEnd: 1415358090265,
-    domLoading: 1415358090270,
-    domInteractive: 1415358090886,
-    domContentLoadedEventStart: 1415358090968,
-    domContentLoadedEventEnd: 1415358091309,
-    domComplete: 0,
-    loadEventStart: 0,
-    loadEventEnd: 0,
-  }],
-  unstruct_event_com_snowplowanalytics_snowplow_link_click_1: {
-    targetUrl: 'http://www.example.com',
-    elementClasses: ['foreground'],
-    elementId: 'exampleLink',
-  },
-  br_features_pdf: true,
-  br_features_flash: false,
-  contexts_com_snowplowanalytics_snowplow_ua_parser_context_1: [{
-    useragentFamily: 'IE',
-    useragentMajor: '7',
-    useragentMinor: '0',
-    useragentPatch: null,
-    useragentVersion: 'IE 7.0',
-    osFamily: 'Windows XP',
-    osMajor: null,
-    osMinor: null,
-    osPatch: null,
-    osPatchMinor: null,
-    osVersion: 'Windows XP',
-    deviceFamily: 'Other',
-  }],
-  domain_sessionid: '2b15e5c8-d3b1-11e4-b9d6-1681e6b88ec1',
-  derived_tstamp: '2013-11-26T00:03:57.886Z',
-  event_vendor: 'com.snowplowanalytics.snowplow',
-  event_name: 'link_click',
-  event_format: 'jsonschema',
-  event_version: '1-0-0',
-  event_fingerprint: 'e3dbfa9cca0412c3d4052863cefb547f',
-  true_tstamp: '2013-11-26T00:03:57.886Z',
-};
-
-function encode(event) {
-  return Object.keys(event)
-    .map(key => event[key])
-    .join('\t');
-}
-
-it('should be transformed', () => {
-  expect(transform(encode(event))).toEqual(expected);
-});
-
-it('should fail on fields number', () => {
-  expect(() => transform(encode({
-    a: '1',
-    b: '2',
-  }))).toThrow('Wrong event fields number.');
-});
-
-it('should fail on one field', () => {
-  expect(() => transform(encode(Object.assign({}, event, {
-    tr_tax_base: 'bad_tax_base',
-  })))).toThrow("Invalid value for field 'tr_tax_base'.");
-});
-
-it('should fail on multiple fields', () => {
-  expect(() => transform(encode(Object.assign({}, event, {
-    dvce_ismobile: 'bad_dvce_ismobile',
-    tr_tax_base: 'bad_tax_base',
-  })))).toThrow([
-    "Invalid value for field 'dvce_ismobile'.",
-    "Invalid value for field 'tr_tax_base'.",
-  ].join('\n'));
-});
-
-it('should not return geo_location', () => {
-  expect(() => transform(encode(Object.assign({}, event, {
-    geo_latitude: '',
-    geo_longitude: '',
-  })))).not.toHaveProperty('geo_location');
-});
diff --git a/src/index.spec.ts b/src/index.spec.ts
new file mode 100644
index 0000000..8e1addf
--- /dev/null
+++ b/src/index.spec.ts
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2018-2019 dokmic, Snowplow Analytics Ltd. All rights reserved.
+ *
+ * This program is licensed to you under the Apache License Version 2.0,
+ * and you may not use this file except in compliance with the Apache License Version 2.0.
+ * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the Apache License Version 2.0 is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
+ */
+
+import { transform } from './index';
+import { event } from './index.fixture';
+
+function encode(event: object) {
+  return Object.keys(event)
+    .map(key => event[key])
+    .join('\t');
+}
+
+describe('transform', () => {
+  it('should be transformed', () => {
+    expect(transform(encode(event))).toMatchSnapshot();
+  });
+
+  it('should fail on fields number', () => {
+    expect(() => transform(encode({ a: '1', b: '2' })))
+      .toThrow('Wrong event fields number.');
+  });
+
+  it('should fail on one field', () => {
+    expect(() => transform(encode({ ...event, tr_tax_base: 'bad_tax_base' })))
+      .toThrow("Invalid value for field 'tr_tax_base'.");
+  });
+
+  it('should fail on multiple fields', () => {
+    expect(() => transform(encode({ ...event, dvce_ismobile: 'bad_dvce_ismobile', tr_tax_base: 'bad_tax_base' })))
+      .toThrow([
+        "Invalid value for field 'dvce_ismobile'.",
+        "Invalid value for field 'tr_tax_base'.",
+      ].join('\n'));
+  });
+
+  it('should not return geo_location', () => {
+    expect(() => transform(encode({ ...event, geo_latitude: '', geo_longitude: '' })))
+      .not.toHaveProperty('geo_location');
+  });
+});
diff --git a/src/types.spec.ts b/src/types.spec.ts
new file mode 100644
index 0000000..e7ddaa1
--- /dev/null
+++ b/src/types.spec.ts
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2018-2019 dokmic, Snowplow Analytics Ltd. All rights reserved.
+ *
+ * This program is licensed to you under the Apache License Version 2.0,
+ * and you may not use this file except in compliance with the Apache License Version 2.0.
+ * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the Apache License Version 2.0 is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
+ */
+
+import { Boolean, Contexts, Double, Integer, String, Timestamp, Unstruct } from './types';
+
+describe('String', () => {
+  it('should parse string', () => {
+    expect(String('key', 'value')).toEqual([{ key: 'key', value: 'value' }]);
+  });
+});
+
+describe('Integer', () => {
+  it('should parse integer', () => {
+    expect(Integer('key', '123.456')).toEqual([{ key: 'key', value: 123 }]);
+  });
+
+  it('should throw an error', () => {
+    expect(() => Integer('key', 'string')).toThrow();
+  });
+});
+
+describe('Double', () => {
+  it('should parse float', () => {
+    expect(Double('key', '123.456')).toEqual([{ key: 'key', value: 123.456 }]);
+  });
+
+  it('should throw an error', () => {
+    expect(() => Double('key', 'string')).toThrow();
+  });
+});
+
+describe('Boolean', () => {
+  it('should parse true', () => {
+    expect(Boolean('key', '1')).toEqual([{ key: 'key', value: true }]);
+  });
+
+  it('should parse false', () => {
+    expect(Boolean('key', '0')).toEqual([{ key: 'key', value: false }]);
+  });
+
+  it('should throw an error', () => {
+    expect(() => Boolean('key', '2')).toThrow();
+  });
+});
+
+describe('Timestamp', () => {
+  it('should parse timestamp', () => {
+    expect(Timestamp('key', '2017-01-11 10:20:17')).toEqual([{ key: 'key', value: '2017-01-11T10:20:17Z' }]);
+  });
+});
+
+describe('Contexts', () => {
+  it('should parse contexts', () => {
+    expect(Contexts('', JSON.stringify({
+      data: [
+        {
+          data: { unique: true },
+          schema: 'iglu:com.acme/unduplicated/jsonschema/1-0-0',
+        },
+        {
+          data: { value: 1 },
+          schema: 'iglu:com.acme/duplicated/jsonschema/1-0-0',
+        },
+        {
+          data: { value: 2 },
+          schema: 'iglu:com.acme/duplicated/jsonschema/1-0-0',
+        },
+      ],
+      schema: 'iglu:com.snowplowanalytics.snowplow/contexts/jsonschema/1-0-0',
+    }))).toEqual([
+      {
+        key: 'contexts_com_acme_unduplicated_1',
+        value: [
+          { unique: true },
+        ],
+      },
+      {
+        key: 'contexts_com_acme_duplicated_1',
+        value: [
+          { value: 1 },
+          { value: 2 },
+        ],
+      },
+    ]);
+  });
+});
+
+describe('Unstruct', () => {
+  it('should parse unstruct', () => {
+    expect(Unstruct('', JSON.stringify({
+      data: {
+        data: { key: 'value' },
+        schema: 'iglu:com.snowplowanalytics.snowplow/link_click/jsonschema/1-0-1',
+      },
+      schema: 'iglu:com.snowplowanalytics.snowplow/unstruct_event/jsonschema/1-0-0',
+    }))).toEqual([{
+      key: 'unstruct_event_com_snowplowanalytics_snowplow_link_click_1',
+      value: { key: 'value' },
+    }]);
+  });
+
+  it('should throw an error on missing data', () => {
+    expect(() => Unstruct('', JSON.stringify({
+      schema: 'iglu:com.snowplowanalytics.snowplow/unstruct_event/jsonschema/1-0-0',
+      data: {},
+    }))).toThrow();
+  });
+
+  it('should throw an error on invalid schema', () => {
+    expect(() => Unstruct('', JSON.stringify({
+      data: {
+        data: { key: 'value' },
+        schema: 'something',
+      },
+      schema: 'iglu:com.snowplowanalytics.snowplow/unstruct_event/jsonschema/1-0-0',
+    }))).toThrow();
+  });
+});
diff --git a/tsconfig.json b/tsconfig.json
index d63b018..e5437a9 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,16 +13,9 @@
     "target": "es6"
   },
   "exclude": [
-    "node_modules",
-    "**/*.test.ts"
-  ],
-  "include": [
-    "**/*.ts"
+    "node_modules"
   ],
   "typeRoots": [
     "node_modules/@types"
-  ],
-  "types": [
-    "jest"
   ]
 }