diff --git a/src/functions/tagoio-validator.ts b/src/functions/tagoio-validator.ts
index 550801e4..3668716c 100644
--- a/src/functions/tagoio-validator.ts
+++ b/src/functions/tagoio-validator.ts
@@ -59,7 +59,7 @@ async function validateNetworkFiles(directoryPath: string): Promise<void> {
       const networkPath = path.join(filePath, "network.jsonc");
 
       if (!fs.existsSync(networkPath)) {
-        throw `Network file not found in ${filePath}`;
+        throw `network.jsonc manifest file not found in ${filePath}`;
       }
 
       const networkData: Network = JSON.parse(
@@ -112,7 +112,7 @@ async function validateConnectorFiles(directoryPath: string): Promise<void> {
         const connectorPath = path.join(modelPath, "connector.jsonc");
 
         if (!fs.existsSync(connectorPath)) {
-          throw `Connector file not found in ${modelPath}`;
+          throw `connector.jsonc manifest file not found in ${modelPath}`;
         }
 
         const connectorData: Connector = JSON.parse(
diff --git a/src/helpers/build.test.ts b/src/helpers/build.test.ts
new file mode 100644
index 00000000..a4499e4c
--- /dev/null
+++ b/src/helpers/build.test.ts
@@ -0,0 +1,39 @@
+import { describe, it, expect } from 'vitest';
+import { buildTS } from './build-ts';
+
+const cleanCode = (code: string): string => {
+  return code.replace(/\s+/g, '');
+};
+
+describe('buildTS function', () => {
+  it('should transform TypeScript code correctly', () => {
+    const inputCode = `
+      function add(a: number, b: number): number {
+        return a + b;
+      }
+      console.log(add(1, 2));
+    `;
+
+    const expectedCode = `
+      function add(a, b) {
+        return a + b;
+      }
+      console.log(add(1, 2));
+    `;
+
+    const transformedCode = buildTS(inputCode);
+
+    expect(cleanCode(transformedCode)).toBe(cleanCode(expectedCode));
+  });
+
+  it('should throw an error for invalid TypeScript code', () => {
+    const invalidCode = `
+      function add(a: number, b: number) {
+        return new.Date(); // wrong code
+      }
+      console.log(add(1, 2));
+    `;
+
+    expect(() => buildTS(invalidCode)).toThrow();
+  });
+});
diff --git a/src/helpers/create-connectors.ts b/src/helpers/create-connectors.ts
index a5bc6c53..29f264af 100644
--- a/src/helpers/create-connectors.ts
+++ b/src/helpers/create-connectors.ts
@@ -67,7 +67,7 @@ async function createConnectors(knexClient: Knex, directoryPath: string): Promis
       const connectorPath = path.join(modelPath, "connector.jsonc");
 
       if (!fs.existsSync(connectorPath)) {
-        throw `Connector file not found in ${modelPath}`;
+        throw `connector.jsonc manifest file not found in ${modelPath}`;
       }
 
       const connectorData: Connector = JSON.parse(fs.readFileSync(connectorPath, "utf8"));
diff --git a/src/helpers/create-networks.ts b/src/helpers/create-networks.ts
index 4f4f9509..7e3d9322 100644
--- a/src/helpers/create-networks.ts
+++ b/src/helpers/create-networks.ts
@@ -58,7 +58,7 @@ async function createNetworks(knexClient: Knex, directoryPath: string): Promise<
     }
     const networkPath = path.join(filePath, "network.jsonc");
     if (!fs.existsSync(networkPath)) {
-      throw `Network file not found in ${filePath}`;
+      throw `network.jsonc manifest file not found in ${filePath}`;
     }
     const networkData: Network = JSON.parse(
       fs.readFileSync(networkPath, "utf8")
diff --git a/src/helpers/resolve-payload.test.ts b/src/helpers/resolve-payload.test.ts
new file mode 100644
index 00000000..23d8bcec
--- /dev/null
+++ b/src/helpers/resolve-payload.test.ts
@@ -0,0 +1,41 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+import { resolvePayload } from './resolve-payload'; // Adjust the path as needed
+
+// Mock the module dependencies
+vi.mock('./read-file', () => ({
+  readFileFromPath: () => {
+    return Buffer.from("Hello JS");
+  },
+}));
+
+vi.mock('./build-ts', () => ({
+  buildTS: () => {
+    return `console.log("Hello, world TS!");`;
+  },
+}));
+
+describe('resolvePayload function', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('should correctly resolve payload for a TypeScript file', async () => {
+    const path = '/some/path';
+    const filename = 'example.ts';
+
+    const resultBuff = resolvePayload(path, filename);
+
+    const result = resultBuff.toString();
+    expect(result).toBe('console.log("Hello, world TS!");');
+  });
+
+  it('should correctly resolve payload for a non-TypeScript file', async () => {
+    const path = '/some/path';
+    const filename = 'example.js';
+
+    const resultBuff = resolvePayload(path, filename);
+
+    const result = resultBuff.toString();
+    expect(result).toBe('Hello JS');
+  });
+});
diff --git a/src/validator/connector.test.ts b/src/validator/connector.test.ts
new file mode 100644
index 00000000..96966168
--- /dev/null
+++ b/src/validator/connector.test.ts
@@ -0,0 +1,71 @@
+import { describe, it, expect } from 'vitest';
+import { zConnector, TypeConnector } from './connector'; // Adjust the path as needed
+
+describe('zConnector schema', () => {
+  it('should validate a correct connector object', () => {
+    const validData = {
+      id: '123456789012345678901234',
+      name: 'Test Connector',
+      version: '1.0.0',
+      networks: ['network1', 'network2'],
+      description: 'A test connector description',
+      install_text: 'Installation instructions',
+      install_end_text: 'End of installation instructions',
+      device_annotation: 'Device annotation text',
+      device_parameters: [{}],
+      logo: Buffer.from('logo data'),
+      payload_decoder: Buffer.from('decoder data'),
+    };
+
+    const result = zConnector.safeParse(validData);
+
+    expect(result.success).toBe(true);
+  });
+
+  it('should fail validation for a connector object with invalid data', () => {
+    const invalidData = {
+      id: '123', // too short
+      name: 'Test Connector',
+      version: '1.0.0',
+      networks: [], // empty array
+      description: 'A very long description that exceeds the maximum allowed length of five hundred characters' +
+                   'A very long description that exceeds the maximum allowed length of five hundred characters' +
+                   'A very long description that exceeds the maximum allowed length of five hundred characters' +
+                   'A very long description that exceeds the maximum allowed length of five hundred characters',
+      install_text: 'Installation instructions',
+      install_end_text: 'End of installation instructions',
+      device_annotation: 'Device annotation text',
+      device_parameters: { /* add invalid data according to zIntegrationParameters */ },
+      logo: 123, // not a buffer or string
+      payload_decoder: 'too long data that exceeds the 64-byte limit', // too long
+    };
+
+    const result = zConnector.safeParse(invalidData);
+    expect(result.success).toBe(false);
+    if (!result.success) {
+      expect(result.error.issues[0].path[0]).toBe('networks');
+      expect(result.error.issues[0].message).toBe('Array must contain at least 1 element(s)');
+
+      expect(result.error.issues[1].path[0]).toBe('device_parameters');
+      expect(result.error.issues[1].message).toBe('Expected array, received object');
+
+      expect(result.error.issues[2].path[0]).toBe('logo');
+      expect(result.error.issues[2].message).toBe('Invalid input');
+
+      expect(result.error.issues[3].path[0]).toBe('payload_decoder');
+      expect(result.error.issues[3].message).toBe('Invalid Payload Parser');
+    }
+  });
+
+  it('should transform networks to JSON string', () => {
+    const data = {
+      id: '123456789012345678901234',
+      name: 'Test Connector',
+      version: '1.0.0',
+      networks: ['network1', 'network2'],
+    };
+
+    const result = zConnector.parse(data);
+    expect(result.networks).toBe(JSON.stringify(['network1', 'network2']));
+  });
+});
diff --git a/src/validator/network.test.ts b/src/validator/network.test.ts
new file mode 100644
index 00000000..37613cbb
--- /dev/null
+++ b/src/validator/network.test.ts
@@ -0,0 +1,87 @@
+import { describe, it, expect } from 'vitest';
+import { zNetwork, TypeNetwork } from './network'; // Adjust the path as needed
+
+describe('zNetwork schema', () => {
+  it('should validate a correct network object', () => {
+    const validData = {
+      id: '123456789012345678901234',
+      name: 'Test Network',
+      version: '1.0.0',
+      description: 'A test network description',
+      documentation_url: 'http://example.com',
+      middleware_endpoint: 'middleware.example.com',
+      serial_number: {
+        case: 'upper',
+        image: Buffer.from('image data'),
+        label: 'Test Label',
+        mask: 'Test Mask',
+        required: true,
+      },
+      device_parameters: null,
+      icon: Buffer.from('icon data'),
+      logo: 'logo data',
+      banner: Buffer.from('banner data'),
+      payload_decoder: Buffer.from('decoder data'),
+    };
+
+    const result = zNetwork.safeParse(validData);
+
+    expect(result.success).toBe(true);
+  });
+
+  it('should fail validation for a network object with invalid data', () => {
+    const invalidData = {
+      id: '123', // too short
+      name: 'Test Network',
+      version: '1.0.0',
+      description: 'A test network description',
+      documentation_url: 'invalid-url', // not a valid URL
+      middleware_endpoint: 'invalid-url', // not a valid URL
+      serial_number: {
+        case: 'invalid-case', // not a valid enum value
+        image: 'not a buffer or string',
+        label: 'A very long label that exceeds the maximum allowed length of one hundred characters' +
+               'A very long label that exceeds the maximum allowed length of one hundred characters',
+        mask: 'A very long mask that exceeds the maximum allowed length of one hundred characters' +
+              'A very long mask that exceeds the maximum allowed length of one hundred characters',
+        required: 'not a boolean', // should be boolean
+      },
+      device_parameters: { /* add invalid data according to zIntegrationParameters */ },
+      icon: 123, // not a buffer or string
+      logo: 123, // not a buffer or string
+      banner: 123, // not a buffer or string
+      payload_decoder: 'too long data that exceeds the 64-byte limit', // too long
+    };
+
+    const result = zNetwork.safeParse(invalidData);
+
+    expect(result.success).toBe(false);
+    expect(result.error?.issues[0].path[0]).toBe('middleware_endpoint');
+    expect(result.error?.issues[0].message).toBe('Invalid domain');
+    expect(result.error?.issues[1].path[0]).toBe('serial_number');
+    expect(result.error?.issues[1].message).toBe("Invalid enum value. Expected 'lower' | 'upper' | '', received 'invalid-case'");
+    expect(result.error?.issues[2].path[0]).toBe('serial_number');
+    expect(result.error?.issues[2].message).toBe('String must contain at most 100 character(s)');
+
+  });
+
+  it('should transform serial_number to JSON string', () => {
+    const data = {
+      id: '123456789012345678901234',
+      name: 'Test Network',
+      version: '1.0.0',
+      serial_number: {
+        case: 'lower',
+        label: 'Test Label',
+        required: true,
+      },
+    };
+
+    const result = zNetwork.parse(data);
+    expect(result.serial_number).toBe(JSON.stringify({
+      case: 'lower',
+      label: 'Test Label',
+      required: true,
+    }));
+  });
+});