Before: call ale#test#SetDirectory('/testplugin/test') runtime ale_linters/kotlin/javac.vim After: call ale#test#RestoreDirectory() call ale#linter#Reset() Execute(Should return directory for 'mvnw' if found in parent directory): call ale#test#SetFilename('maven-test-files/maven-java-project/module1/src/main/java/dummy1.java') AssertEqual \ ale#path#Simplify(g:dir . '/maven-test-files/maven-java-project/module1'), \ ale#maven#FindProjectRoot(bufnr('')) Execute(Should return directory for 'pom.xml' if found in parent directory): call ale#test#SetFilename('maven-test-files/maven-java-project/module2/src/main/java/dummy2.java') AssertEqual \ ale#path#Simplify(g:dir . '/maven-test-files/maven-java-project/module2'), \ ale#maven#FindProjectRoot(bufnr('')) Execute(Should return empty string if maven files are not found in parent directory): call ale#test#SetFilename('maven-test-files/non-maven-project/src/main/java/dummy.java') AssertEqual \ '', \ ale#maven#FindProjectRoot(bufnr(''))