[#1531] add failing test

src/test/java/picocli/Issue1531ResetOptionMethods.java

@@ -0,0 +1,48 @@
+package picocli;
+
+import org.junit.Ignore;
+import org.junit.Test;
+import picocli.CommandLine.Command;
+import picocli.CommandLine.Option;
+
+import java.util.Collections;
+import java.util.List;
+
+import static org.junit.Assert.*;
+
+// https://github.com/remkop/picocli/issues/1531
+public class Issue1531ResetOptionMethods {
+
+    @Command
+    static class MyCommand {
+        List<String> modules;
+
+        @Option(names = "-c", description = "comps", split = ",")
+        List<String> comps;
+
+        @Option(names = "-m", description = "modules", split = ",")
+        public void setModules(final List<String> modules) {
+            this.modules = modules;
+        }
+    }
+
+    @Ignore("https://github.com/remkop/picocli/issues/1531")
+    @Test
+    public void testResetOptionMethodsOnReuse() {
+        MyCommand myCommand = new MyCommand();
+        CommandLine cmd = new CommandLine(myCommand);
+
+        cmd.parseArgs(); // first, invoke with no args
+        assertNull(myCommand.comps);
+        assertNull(myCommand.modules);
+
+        // now invoke with some arguments
+        cmd.parseArgs("-c c1 -m m1".split(" "));
+        assertEquals(Collections.singletonList("c1"), myCommand.comps);
+        assertEquals(Collections.singletonList("m1"), myCommand.modules);
+
+        cmd.parseArgs(); // finally, invoke with no args again
+        assertNull(myCommand.comps);
+        assertNull(myCommand.modules);
+    }
+}