diff --git a/test/codegen/har_codegen_test.dart b/test/codegen/har_codegen_test.dart
new file mode 100644
index 00000000..cd9be868
--- /dev/null
+++ b/test/codegen/har_codegen_test.dart
@@ -0,0 +1,319 @@
+import 'package:apidash/codegen/others/har.dart';
+import '../request_models.dart';
+import 'package:test/test.dart';
+
+void main() {
+  final harCodeGen = HARCodeGen();
+
+  group('GET Request', () {
+    test('GET 1', () {
+      const expectedCode = r"""{
+  "method": "GET",
+  "url": "https://api.foss42.com",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [],
+  "headers": []
+}""";
+      expect(harCodeGen.getCode(requestModelGet1, "https"), expectedCode);
+    });
+
+    test('GET 2', () {
+      const expectedCode = r"""{
+  "method": "GET",
+  "url": "https://api.foss42.com/country/data?code=US",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [
+    {
+      "name": "code",
+      "value": "US"
+    }
+  ],
+  "headers": []
+}""";
+      expect(harCodeGen.getCode(requestModelGet2, "https"), expectedCode);
+    });
+
+    test('GET 3', () {
+      const expectedCode = r"""{
+  "method": "GET",
+  "url": "https://api.foss42.com/country/data?code=IND",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [
+    {
+      "name": "code",
+      "value": "IND"
+    }
+  ],
+  "headers": []
+}""";
+      expect(harCodeGen.getCode(requestModelGet3, "https"), expectedCode);
+    });
+
+    test('GET 4', () {
+      const expectedCode = r"""{
+  "method": "GET",
+  "url": "https://api.foss42.com/humanize/social?num=8700000&digits=3&system=SS&add_space=true&trailing_zeros=true",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [
+    {
+      "name": "num",
+      "value": "8700000"
+    },
+    {
+      "name": "digits",
+      "value": "3"
+    },
+    {
+      "name": "system",
+      "value": "SS"
+    },
+    {
+      "name": "add_space",
+      "value": "true"
+    },
+    {
+      "name": "trailing_zeros",
+      "value": "true"
+    }
+  ],
+  "headers": []
+}""";
+      expect(harCodeGen.getCode(requestModelGet4, "https"), expectedCode);
+    });
+
+    test('GET 5', () {
+      const expectedCode = r"""{
+  "method": "GET",
+  "url": "https://api.github.com/repos/foss42/apidash",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [],
+  "headers": [
+    {
+      "name": "User-Agent",
+      "value": "Test Agent"
+    }
+  ]
+}""";
+      expect(harCodeGen.getCode(requestModelGet5, "https"), expectedCode);
+    });
+
+    test('GET 6', () {
+      const expectedCode = r"""{
+  "method": "GET",
+  "url": "https://api.github.com/repos/foss42/apidash?raw=true",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [
+    {
+      "name": "raw",
+      "value": "true"
+    }
+  ],
+  "headers": [
+    {
+      "name": "User-Agent",
+      "value": "Test Agent"
+    }
+  ]
+}""";
+      expect(harCodeGen.getCode(requestModelGet6, "https"), expectedCode);
+    });
+
+    test('GET 7', () {
+      const expectedCode = r"""{
+  "method": "GET",
+  "url": "https://api.foss42.com",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [],
+  "headers": []
+}""";
+      expect(harCodeGen.getCode(requestModelGet7, "https"), expectedCode);
+    });
+
+    test('GET 8', () {
+      const expectedCode = r"""{
+  "method": "GET",
+  "url": "https://api.github.com/repos/foss42/apidash?raw=true",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [
+    {
+      "name": "raw",
+      "value": "true"
+    }
+  ],
+  "headers": [
+    {
+      "name": "User-Agent",
+      "value": "Test Agent"
+    }
+  ]
+}""";
+      expect(harCodeGen.getCode(requestModelGet8, "https"), expectedCode);
+    });
+  });
+
+  group('HEAD Request', () {
+    test('HEAD 1', () {
+      const expectedCode = r"""{
+  "method": "HEAD",
+  "url": "https://api.foss42.com",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [],
+  "headers": []
+}""";
+      expect(harCodeGen.getCode(requestModelHead1, "https"), expectedCode);
+    });
+
+    test('HEAD 2', () {
+      const expectedCode = r"""{
+  "method": "HEAD",
+  "url": "http://api.foss42.com",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [],
+  "headers": []
+}""";
+      expect(harCodeGen.getCode(requestModelHead2, "http"), expectedCode);
+    });
+  });
+
+  group('POST Request', () {
+    test('POST 1', () {
+      const expectedCode = r"""{
+  "method": "POST",
+  "url": "https://api.foss42.com/case/lower",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [],
+  "headers": [
+    {
+      "name": "Content-Type",
+      "value": "text/plain"
+    }
+  ],
+  "postData": {
+    "mimeType": "text/plain",
+    "text": "{\n\"text\": \"I LOVE Flutter\"\n}"
+  }
+}""";
+      expect(harCodeGen.getCode(requestModelPost1, "https"), expectedCode);
+    });
+
+    test('POST 2', () {
+      const expectedCode = r"""{
+  "method": "POST",
+  "url": "https://api.foss42.com/case/lower",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [],
+  "headers": [
+    {
+      "name": "Content-Type",
+      "value": "application/json"
+    }
+  ],
+  "postData": {
+    "mimeType": "application/json",
+    "text": "{\n\"text\": \"I LOVE Flutter\"\n}"
+  }
+}""";
+      expect(harCodeGen.getCode(requestModelPost2, "https"), expectedCode);
+    });
+
+    test('POST 3', () {
+      const expectedCode = r"""{
+  "method": "POST",
+  "url": "https://api.foss42.com/case/lower",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [],
+  "headers": [
+    {
+      "name": "Content-Type",
+      "value": "application/json"
+    },
+    {
+      "name": "User-Agent",
+      "value": "Test Agent"
+    }
+  ],
+  "postData": {
+    "mimeType": "application/json",
+    "text": "{\n\"text\": \"I LOVE Flutter\"\n}"
+  }
+}""";
+      expect(harCodeGen.getCode(requestModelPost3, "https"), expectedCode);
+    });
+  });
+  group('PUT Request', () {
+    test('PUT 1', () {
+      const expectedCode = r"""{
+  "method": "PUT",
+  "url": "https://reqres.in/api/users/2",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [],
+  "headers": [
+    {
+      "name": "Content-Type",
+      "value": "application/json"
+    }
+  ],
+  "postData": {
+    "mimeType": "application/json",
+    "text": "{\n\"name\": \"morpheus\",\n\"job\": \"zion resident\"\n}"
+  }
+}""";
+      expect(harCodeGen.getCode(requestModelPut1, "https"), expectedCode);
+    });
+  });
+
+  group('PATCH Request', () {
+    test('PATCH 1', () {
+      const expectedCode = r"""{
+  "method": "PATCH",
+  "url": "https://reqres.in/api/users/2",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [],
+  "headers": [
+    {
+      "name": "Content-Type",
+      "value": "application/json"
+    }
+  ],
+  "postData": {
+    "mimeType": "application/json",
+    "text": "{\n\"name\": \"marfeus\",\n\"job\": \"accountant\"\n}"
+  }
+}""";
+      expect(harCodeGen.getCode(requestModelPatch1, "https"), expectedCode);
+    });
+  });
+
+  group('DELETE Request', () {
+    test('DELETE 1', () {
+      const expectedCode = r"""{
+  "method": "DELETE",
+  "url": "https://reqres.in/api/users/2",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [],
+  "headers": []
+}""";
+      expect(harCodeGen.getCode(requestModelDelete1, "https"), expectedCode);
+    });
+
+    test('DELETE 2', () {
+      const expectedCode = r"""{
+  "method": "DELETE",
+  "url": "https://reqres.in/api/users/2",
+  "httpVersion": "HTTP/1.1",
+  "queryString": [],
+  "headers": [
+    {
+      "name": "Content-Type",
+      "value": "application/json"
+    }
+  ],
+  "postData": {
+    "mimeType": "application/json",
+    "text": "{\n\"name\": \"marfeus\",\n\"job\": \"accountant\"\n}"
+  }
+}""";
+      expect(harCodeGen.getCode(requestModelDelete2, "https"), expectedCode);
+    });
+  });
+}