Merge pull request #736 from zhelenskiy/fix-unstable-class-order

Fix unstable class order

Author: nikpachoo

src/main/kotlin/com/compiler/server/compiler/components/KotlinCompiler.kt

@@ -70,7 +70,7 @@ class KotlinCompiler(
         1 -> compiled.mainClasses.single()
         else -> return@execute JvmExecutionResult(
           exception = IllegalArgumentException(
-            "Multiple classes in project contain main methods found: ${compiled.mainClasses.joinToString()}"
+            "Multiple classes in project contain main methods found: ${compiled.mainClasses.sorted().joinToString()}"
           ).toExceptionDescriptor()
         )
       }

src/test/kotlin/com/compiler/server/JvmRunnerTest.kt

@@ -66,7 +66,7 @@ class JvmRunnerTest : BaseExecutorTest() {
                     }
                 }""".trimIndent(),
       contains = "IllegalArgumentException",
-      message = "Multiple classes in project contain main methods found: FileKt, A",
+      message = "Multiple classes in project contain main methods found: A, FileKt",
     )
   }