chore: add test cases for utility to improve coverage

src/v0/util/index.test.js

@@ -15,6 +15,7 @@ const {
   convertToUuid,
 } = require('./index');
 const exp = require('constants');
+const { ERROR_MESSAGES } = require('./constant');
 
 // Names of the utility functions to test
 const functionNames = [
@@ -1073,3 +1074,63 @@ describe('', () => {
     expect(res).toBe(1003);
   });
 });
+
+describe('getBodyFromV2SpecPayload', () => {
+  it('should successfully parse valid JSON body', () => {
+    const input = {
+      request: {
+        body: '{"key": "value", "number": 123}',
+      },
+    };
+    const expected = {
+      key: 'value',
+      number: 123,
+    };
+    expect(utilities.getBodyFromV2SpecPayload(input)).toEqual(expected);
+  });
+
+  it('should throw TransformationError for malformed JSON', () => {
+    const input = {
+      request: {
+        body: '{invalid json}',
+      },
+    };
+    expect(() => utilities.getBodyFromV2SpecPayload(input)).toThrow(
+      ERROR_MESSAGES.MALFORMED_JSON_IN_REQUEST_BODY,
+    );
+  });
+
+  it('should throw TransformationError when request body is missing', () => {
+    const input = {
+      request: {},
+    };
+    expect(() => utilities.getBodyFromV2SpecPayload(input)).toThrow(
+      ERROR_MESSAGES.REQUEST_BODY_NOT_PRESENT_IN_V2_SPEC_PAYLOAD,
+    );
+  });
+
+  it('should throw TransformationError when request is missing', () => {
+    const input = {};
+    expect(() => utilities.getBodyFromV2SpecPayload(input)).toThrow(
+      ERROR_MESSAGES.REQUEST_BODY_NOT_PRESENT_IN_V2_SPEC_PAYLOAD,
+    );
+  });
+
+  it('should parse empty JSON object', () => {
+    const input = {
+      request: {
+        body: '{}',
+      },
+    };
+    expect(utilities.getBodyFromV2SpecPayload(input)).toEqual({});
+  });
+
+  it('should parse JSON array', () => {
+    const input = {
+      request: {
+        body: '[1,2,3]',
+      },
+    };
+    expect(utilities.getBodyFromV2SpecPayload(input)).toEqual([1, 2, 3]);
+  });
+});