Cache HOCON config to avoid re-parsing on every test invocation

The config was being parsed ~170 times (once per testApplication call).
Use a lazy singleton to parse it once and reuse across all tests.

Co-Authored-By: doris.t.lam <dlamoris@gmail.com>

Author: devin-ai-integration[bot]

src/test/kotlin/org/openmbee/flexo/mms/util/Environment.kt

@@ -3,31 +3,25 @@ package org.openmbee.flexo.mms.util
 import com.typesafe.config.ConfigFactory
 import io.ktor.server.config.*
 import io.ktor.server.testing.*
-import java.io.InputStreamReader
+
+private val cachedConfig: HoconApplicationConfig by lazy {
+    HoconApplicationConfig(ConfigFactory.parseResources("application.conf.test").resolve())
+}
 
 /**
  * Load test environment from application.conf.test resource
  */
-fun testEnv(): ApplicationConfig {
-    return Thread.currentThread().contextClassLoader.getResourceAsStream("application.conf.test")?.let { stream ->
-        InputStreamReader(stream).use { reader ->
-            HoconApplicationConfig(ConfigFactory.parseReader(reader).resolve())
-        }
-    } ?: throw IllegalStateException("application.conf.test not found")
-}
+fun testEnv(): ApplicationConfig = cachedConfig
 
 /**
  * Wrapper around Ktor's testApplication that automatically loads the
  * application.conf.test configuration file. In Ktor 3, testApplication
  * no longer auto-loads modules from config files.
  */
 fun testApplication(block: suspend ApplicationTestBuilder.() -> Unit) {
-    val hoconConfig = HoconApplicationConfig(
-        ConfigFactory.parseResources("application.conf.test").resolve()
-    )
     io.ktor.server.testing.testApplication {
         environment {
-            config = hoconConfig
+            config = cachedConfig
         }
         block()
     }