use possesive quantifier

src/main/java/org/cryptomator/frontend/fuse/mount/AbstractMountBuilder.java

@@ -29,9 +29,10 @@ public MountBuilder setMountpoint(Path mountPoint) {
 
  @Override
  public MountBuilder setMountFlags(String mountFlagsString) {
+ var mfs = " "+mountFlagsString.trim();
  // we assume that each flag starts with "-"
  var notEmpty = Predicate.not(String::isBlank);
- this.mountFlags = Pattern.compile("\\s+-").splitAsStream(" "+mountFlagsString).filter(notEmpty).map("-"::concat).collect(Collectors.toUnmodifiableSet());
+ this.mountFlags = Pattern.compile("\\s++-").splitAsStream(mfs).filter(notEmpty).map("-"::concat).collect(Collectors.toUnmodifiableSet());
  return this;
  }
 

src/test/java/org/cryptomator/frontend/fuse/mount/AbstractMountBuilderTest.java

@@ -0,0 +1,45 @@
+package org.cryptomator.frontend.fuse.mount;
+
+import org.cryptomator.integrations.mount.Mount;
+import org.cryptomator.integrations.mount.MountFailedException;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+
+import java.nio.file.Path;
+import java.util.Arrays;
+
+public class AbstractMountBuilderTest {
+
+ TestMountBuilder inTest = new TestMountBuilder();
+
+ @ParameterizedTest
+ @CsvSource(textBlock = """
+ -asd,-asd
+ -asd\t-qwe,-asd;-qwe
+ -asd ,-asd
+ -abc qwe,-abc qwe
+ \t -foo file/to/use -bar 4 -b az not,-foo file/to/use;-bar 4;-b az not
+ """)
+ public void testSetMountFlags(String toTest, String expectedRaw) {
+ var expected = Arrays.stream(expectedRaw.split(";"));
+
+ inTest.setMountFlags(toTest);
+ expected.forEach( exp -> Assertions.assertTrue(inTest.mountFlags.contains(exp)));
+ }
+
+
+ class TestMountBuilder extends AbstractMountBuilder {
+
+ public TestMountBuilder() {
+ super(Path.of("abc"));
+ }
+
+ @Override
+ public Mount mount() throws MountFailedException {
+ return null;
+ }
+ }
+}