Prevent double initialization in codegen tests, fix ScriptGenTest#testDependentScripts

Add an assertion to prevent duplicate initialization of CodegenTestFiles
instance in CodegenTestCase, which was happening in ScriptGenTest with multiple
invocation of loadFile()

compiler/testData/codegen/scriptCustom/fibwprunner.kts

@@ -1,3 +1,3 @@
-val fibwp = test.Fibwp(5)
+val fibwp = test.Fibwp_lang(5)
 val callResult = fibwp.fib(4)
-val result = fibwp.num  + fibwp.result - 5
+val result = fibwp.num  + fibwp.result - 5

compiler/tests-common/org/jetbrains/kotlin/codegen/CodegenTestCase.java

@@ -252,6 +252,7 @@ public abstract class CodegenTestCase extends KtUsefulTestCase {
         try {
             File file = new File(fullPath);
             String content = FileUtil.loadFile(file, Charsets.UTF_8.name(), true);
+            assert myFiles == null : "Should not initialize myFiles twice";
             myFiles = CodegenTestFiles.create(file.getName(), content, myEnvironment.getProject());
             return content;
         } catch (IOException e) {

compiler/tests/org/jetbrains/kotlin/codegen/GenerateNotNullAssertionsTest.java

@@ -55,6 +55,7 @@ public class GenerateNotNullAssertionsTest extends CodegenTestCase {
         configuration.put(JVMConfigurationKeys.DISABLE_PARAM_ASSERTIONS, disableParamAssertions);
 
         myEnvironment = KotlinCoreEnvironment.createForTests(getTestRootDisposable(), configuration, EnvironmentConfigFiles.JVM_CONFIG_FILES);
+        myFiles = null;
     }
 
     private void loadSource(@NotNull String fileName) {

compiler/tests/org/jetbrains/kotlin/codegen/OuterClassGenTest.java

@@ -109,9 +109,10 @@ public class OuterClassGenTest extends CodegenTestCase {
 
     public void testLocalObjectInLambdaInlinedIntoObject() throws Exception {
         OuterClassInfo intoObjectInfo = new OuterClassInfo("foo/Bar", "objectInLambdaInlinedIntoObject", "()V");
-
         doCustomTest("foo/Bar\\$objectInLambdaInlinedIntoObject\\$\\$inlined\\$inlineFoo\\$1", intoObjectInfo, "inlineObject");
+    }
 
+    public void testLocalObjectInLambdaInlinedIntoObject2() throws Exception {
         OuterClassInfo objectInLambda = new OuterClassInfo("foo/Bar$objectInLambdaInlinedIntoObject$$inlined$inlineFoo$1", "run", "()V");
         doCustomTest("foo/Bar\\$objectInLambdaInlinedIntoObject\\$\\$inlined\\$inlineFoo\\$1\\$lambda\\$1",
                      objectInLambda, "inlineObject");
@@ -134,9 +135,10 @@ public class OuterClassGenTest extends CodegenTestCase {
 
     public void testLambdaInLambdaInlinedIntoObject() throws Exception {
         OuterClassInfo intoObjectInfo = new OuterClassInfo("foo/Bar", "objectInLambdaInlinedIntoObject", "()V");
-
         doCustomTest("foo/Bar\\$objectInLambdaInlinedIntoObject\\$\\$inlined\\$inlineFoo\\$1", intoObjectInfo, "inlineLambda");
+    }
 
+    public void testLambdaInLambdaInlinedIntoObject2() throws Exception {
         OuterClassInfo objectInLambda = new OuterClassInfo("foo/Bar$objectInLambdaInlinedIntoObject$$inlined$inlineFoo$1", "invoke", "()V");
         doCustomTest("foo/Bar\\$objectInLambdaInlinedIntoObject\\$\\$inlined\\$inlineFoo\\$1\\$lambda\\$1",
                      objectInLambda, "inlineLambda");

compiler/tests/org/jetbrains/kotlin/codegen/ScriptGenTest.kt

@@ -24,9 +24,7 @@ import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
 import org.jetbrains.kotlin.config.JVMConfigurationKeys
 import org.jetbrains.kotlin.config.addKotlinSourceRoots
 import org.jetbrains.kotlin.script.KotlinScriptDefinitionFromTemplate
-import org.jetbrains.kotlin.script.ScriptTemplateDefinition
 import org.jetbrains.kotlin.scripts.ScriptWithIntParam
-import org.jetbrains.kotlin.scripts.TestKotlinScriptDependenciesResolver
 import org.jetbrains.kotlin.test.ConfigurationKind
 import org.jetbrains.kotlin.test.KotlinTestUtils
 import org.jetbrains.kotlin.test.TestJdkKind
@@ -107,8 +105,6 @@ class ScriptGenTest : CodegenTestCase() {
 
         myEnvironment = KotlinCoreEnvironment.createForTests(testRootDisposable, configuration, EnvironmentConfigFiles.JVM_CONFIG_FILES)
 
-        for (path in sourcePaths) {
+        loadFiles(*sourcePaths.toTypedArray())
-            loadFile(path)
-        }
     }
 }