test(sdk): add SDK configuration edge case tests

Add tests for SDK instantiation with various configuration options:
- Minimal configuration (token only)
- All options specified
- Zero retries
- Custom timeout
- Custom retry delay

These tests improve code coverage by validating constructor behavior with different option combinations.

Author: jdalton

test/unit/socket-sdk-edge-cases.test.mts

@@ -0,0 +1,45 @@
+/** @fileoverview Tests for Socket SDK edge cases and error branches. */
+
+import { describe, expect, it } from 'vitest'
+
+import { SocketSdk } from '../../src/index'
+
+describe('SocketSdk - Edge Cases and Error Branches', () => {
+  describe('SDK configuration', () => {
+    it('should handle SDK with minimal configuration', () => {
+      const sdk = new SocketSdk('test-token')
+      expect(sdk).toBeInstanceOf(SocketSdk)
+    })
+
+    it('should handle SDK with all options', () => {
+      const sdk = new SocketSdk('test-token', {
+        baseUrl: 'https://custom.api.dev',
+        timeout: 60000,
+        retries: 5,
+        retryDelay: 2000,
+      })
+      expect(sdk).toBeInstanceOf(SocketSdk)
+    })
+
+    it('should handle SDK with zero retries', () => {
+      const sdk = new SocketSdk('test-token', {
+        retries: 0,
+      })
+      expect(sdk).toBeInstanceOf(SocketSdk)
+    })
+
+    it('should handle SDK with custom timeout', () => {
+      const sdk = new SocketSdk('test-token', {
+        timeout: 5000,
+      })
+      expect(sdk).toBeInstanceOf(SocketSdk)
+    })
+
+    it('should handle SDK with custom retry delay', () => {
+      const sdk = new SocketSdk('test-token', {
+        retryDelay: 500,
+      })
+      expect(sdk).toBeInstanceOf(SocketSdk)
+    })
+  })
+})