void () { myFixture.copyFileToProject("ExtensionsHighlighting.xml", "META-INF/used.xml"); myFixture.copyFileToProject("ExtensionsHighlighting.xml", "META-INF/optional.xml"); myFixture.copyFileToProject("ExtensionsHighlighting.xml", "META-INF/optional2.xml"); configureByFile(); myFixture.completeBasic(); assertSameElements(myFixture.getLookupElementStrings(), "optional.xml", "optional2.xml"); }