From d03ad20ef7a6da899d8276d3adffe6bc2ed2d64f Mon Sep 17 00:00:00 2001
From: Aanshi Lahoti <aanshilahoti677@gmail.com>
Date: Mon, 14 Oct 2024 16:39:40 +0530
Subject: [PATCH] chore: test cases added

---
 src/v0/destinations/tune/transform.js |   2 +
 src/v0/destinations/tune/util.test.js | 148 ++++++++++++++++++++++++++
 2 files changed, 150 insertions(+)
 create mode 100644 src/v0/destinations/tune/util.test.js

diff --git a/src/v0/destinations/tune/transform.js b/src/v0/destinations/tune/transform.js
index 11996c99dc..79ef9c0f34 100644
--- a/src/v0/destinations/tune/transform.js
+++ b/src/v0/destinations/tune/transform.js
@@ -66,6 +66,8 @@ const processRouterDest = async (inputs, reqMetadata) => {
 };
 
 module.exports = {
+  responseBuilder,
+  processEvent,
   process,
   processRouterDest,
 };
diff --git a/src/v0/destinations/tune/util.test.js b/src/v0/destinations/tune/util.test.js
new file mode 100644
index 0000000000..58c0811986
--- /dev/null
+++ b/src/v0/destinations/tune/util.test.js
@@ -0,0 +1,148 @@
+import { InstrumentationError } from '@rudderstack/integrations-lib';
+import { responseBuilder, processEvent } from './transform';
+describe('responseBuilder', () => {
+  // Correctly maps properties to destination keys based on eventsMapping
+  it('should map properties to destination keys when eventsMapping is provided', () => {
+    const message = {
+      event: 'product list viewed',
+      properties: {
+        platform: 'meta',
+        conversions: 1,
+        ad_unit_id: 221187,
+        ad_interaction_time: '1652826278',
+      },
+    };
+    const Config = {
+      tuneEvents: [
+        {
+          eventName: 'product list viewed',
+          eventsMapping: [
+            { from: 'platform', to: 'destinationPlatform' },
+            { from: 'conversions', to: 'destinationConversions' },
+          ],
+          url: 'https://example.com/event',
+        },
+      ],
+    };
+    const expectedParams = {
+      destinationPlatform: 'meta',
+      destinationConversions: 1,
+    };
+    const response = responseBuilder(message, { Config });
+    expect(response.params).toEqual(expectedParams);
+    expect(response.endpoint).toBe('https://example.com/event');
+  });
+
+  // Handles empty properties object without errors
+  it('should handle empty properties object without throwing errors', () => {
+    const message = {
+      event: 'product list viewed',
+      properties: {},
+    };
+    const Config = {
+      tuneEvents: [
+        {
+          eventName: 'product list viewed',
+          eventsMapping: [
+            { from: 'platform', to: 'destinationPlatform' },
+            { from: 'conversions', to: 'destinationConversions' },
+          ],
+          url: 'https://example.com/event',
+        },
+      ],
+    };
+    const response = responseBuilder(message, { Config });
+    expect(response.params).toEqual({});
+    expect(response.endpoint).toBe('https://example.com/event');
+  });
+});
+
+describe('processEvent', () => {
+  // Processes 'track' messages correctly using responseBuilder
+  it('should process "track" messages correctly using responseBuilder', () => {
+    const message = {
+      type: 'track',
+      event: 'product list viewed',
+      properties: {
+        platform: 'meta',
+        conversions: 1,
+        ad_unit_id: 221187,
+        ad_interaction_time: '1652826278',
+      },
+    };
+    const destination = {
+      Config: {
+        tuneEvents: [
+          {
+            eventName: 'product list viewed',
+            url: 'https://example.com/track',
+            eventsMapping: [
+              { from: 'platform', to: 'platform_key' },
+              { from: 'conversions', to: 'conversions_key' },
+            ],
+          },
+        ],
+      },
+    };
+    const expectedResponse = {
+      body: {
+        FORM: {},
+        JSON: {},
+        JSON_ARRAY: {},
+        XML: {},
+      },
+      params: {
+        platform_key: 'meta',
+        conversions_key: 1,
+      },
+      endpoint: 'https://example.com/track',
+      event: 'product list viewed',
+      files: {},
+      headers: {},
+      method: 'POST',
+      type: 'REST',
+      version: '1',
+    };
+    const response = processEvent(message, destination);
+    expect(response).toEqual(expectedResponse);
+  });
+
+  // Throws an error if message type is missing
+  it('should throw an error if message type is missing', () => {
+    const message = {
+      event: 'product list viewed',
+      properties: {
+        platform: 'meta',
+        conversions: 1,
+      },
+    };
+    const destination = {
+      Config: {
+        tuneEvents: [],
+      },
+    };
+    expect(() => processEvent(message, destination)).toThrowError(
+      new InstrumentationError('Message Type is not present. Aborting message.', 400),
+    );
+  });
+
+  it('should throw an error when message type is not "track"', () => {
+    const message = {
+      type: 'identify',
+      event: 'product list viewed',
+      properties: {
+        platform: 'meta',
+        conversions: 1,
+      },
+    };
+    const destination = {
+      Config: {
+        tuneEvents: [],
+      },
+    };
+
+    expect(() => processEvent(message, destination)).toThrowError(
+      new InstrumentationError('Message type not supported. Only "track" is allowed.', 400),
+    );
+  });
+});