createLightFile fails for PostgreSQL langage

IntelliJ Platform Testing
1

Hi,
I’m in trouble for testing my plugin (Postgres debugger), this fails

val psiFile = createLightFile("dummy.sql", PgDialect.INSTANCE, sql)

I’ve found this returns null in PsiFileFactoryImpl

  public @Nullable PsiFile trySetupPsiForFile(@NotNull LightVirtualFile lightVirtualFile,
                                              @NotNull Language language,
                                              boolean physical, boolean markAsCopy) {
    FileViewProviderFactory factory = LanguageFileViewProviders.INSTANCE.forLanguage(language);
    FileViewProvider viewProvider = factory != null ? factory.createFileViewProvider(lightVirtualFile, language, myManager, physical) : null;
    if (viewProvider == null) viewProvider = new SingleRootFileViewProvider(myManager, lightVirtualFile, physical);

    language = viewProvider.getBaseLanguage();
    ParserDefinition parserDefinition = LanguageParserDefinitions.INSTANCE.forLanguage(language);
    if (parserDefinition != null) {
      PsiFile psiFile = viewProvider.getPsi(language);
      if (psiFile != null) {
        if (markAsCopy) {
          if (psiFile.getNode() == null) {
            throw new AssertionError("No node for file " + psiFile + "; language=" + language);
          }
          markGenerated(psiFile);
        }
        return psiFile;
      }
    }
    return null;
  }

Build conf

  intellijPlatform {
      intellijIdeaUltimate(version = providers.gradleProperty("platformVersion"))
      bundledPlugins(providers.gradleProperty("platformBundledPlugins").map { it.split(',') })
      plugins(providers.gradleProperty("platformPlugins").map { it.split(',') })
      pluginVerifier()
      zipSigner()
      testFramework(TestFrameworkType.Platform)
      testBundledPlugin(providers.gradleProperty("platformBundledPlugins"))
  }

Plugin conf

platformType = IU
platformVersion = 2025.1.2
platformPlugins =
platformBundledPlugins = com.intellij.database

Gradle 8.13
kotlin = “2.1.20”
intelliJPlatform = “2.6.0”