Fix CommandPart.generateTabComplete for varArg Parameter

SpigotCore_Main/src/de/steamwar/command/CommandPart.java

@@ -133,6 +133,20 @@ public class CommandPart {
     }
 
     public void generateTabComplete(List<String> current, CommandSender commandSender, String[] args, int startIndex) {
+        if (varArgType != null) {
+            for (int i = startIndex; i < args.length - 1; i++) {
+                CheckArgumentResult validArgument = checkArgument(null, commandSender, args, i);
+                if (!validArgument.success) {
+                    return;
+                }
+            }
+            List<String> strings = typeMapper.tabCompletes(commandSender, Arrays.copyOf(args, args.length - 1), args[args.length - 1]);
+            if (strings != null) {
+                current.addAll(strings);
+            }
+            return;
+        }
+
         if (args.length - 1 > startIndex) {
             CheckArgumentResult checkArgumentResult = checkArgument(GuardCheckType.TAB_COMPLETE, commandSender, args, startIndex);
             if (checkArgumentResult.success && next != null) {

SpigotCore_Main/testsrc/de/steamwar/command/SimpleCommandPartTest.java

@@ -27,14 +27,14 @@ import java.util.ArrayList;
 import java.util.List;
 
 import static org.hamcrest.MatcherAssert.assertThat;
-import static org.hamcrest.Matchers.instanceOf;
+import static org.hamcrest.Matchers.*;
-import static org.hamcrest.Matchers.is;
 
 public class SimpleCommandPartTest {
 
     private CommandPart stringCommandPart;
     private CommandPart intCommandPart;
     private CommandPart chainedCommandPart;
+    private CommandPart varArgCommandPart;
 
     private CommandPart simpleGuardPart;
 
@@ -46,6 +46,8 @@ public class SimpleCommandPartTest {
         chainedCommandPart = new CommandPart(SWCommandUtils.createMapper("hello", "world"), null, null, null, GuardCheckType.COMMAND);
         chainedCommandPart.setNext(new CommandPart(SWCommandUtils.MAPPER_FUNCTIONS.get("int"), null, null, null, GuardCheckType.COMMAND));
 
+        varArgCommandPart = new CommandPart(SWCommandUtils.createMapper("hello", "world"), null, String.class, null, GuardCheckType.COMMAND);
+
         simpleGuardPart = new CommandPart(SWCommandUtils.createMapper("hello", "world"), (commandSender, guardCheckType, previousArguments, s) -> s.equals("hello") ? GuardResult.DENIED : GuardResult.ALLOWED, null, null, GuardCheckType.COMMAND);
     }
 
@@ -119,10 +121,48 @@ public class SimpleCommandPartTest {
     public void testChainedCommandTabCompleteOther() {
         List<String> tabCompletes = new ArrayList<>();
         chainedCommandPart.generateTabComplete(tabCompletes, new TestCommandSender(), new String[]{"hello", ""}, 0);
-        System.out.println(tabCompletes);
         assertThat(tabCompletes.size(), is(0));
     }
 
+    @Test
+    public void testVarArgsCommandTabComplete() {
+        List<String> tabCompletes = new ArrayList<>();
+        varArgCommandPart.generateTabComplete(tabCompletes, new TestCommandSender(), new String[]{"hello"}, 0);
+        assertThat(tabCompletes.size(), is(2));
+        assertThat(tabCompletes.get(0), is("hello"));
+        assertThat(tabCompletes.get(1), is("world"));
+    }
+
+    @Test
+    public void testVarArgsCommandTabCompleteDeeper() {
+        List<String> tabCompletes = new ArrayList<>();
+        varArgCommandPart.generateTabComplete(tabCompletes, new TestCommandSender(), new String[]{"hello", "world", "hello", "world"}, 0);
+        System.out.println(tabCompletes);
+        assertThat(tabCompletes.size(), is(2));
+        assertThat(tabCompletes.get(0), is("hello"));
+        assertThat(tabCompletes.get(1), is("world"));
+    }
+
+    @Test
+    public void testVarArgsCommandArgumentParsing() {
+        List<Object> argumentArray = new ArrayList<>();
+        varArgCommandPart.generateArgumentArray(argumentArray, new TestCommandSender(), new String[]{"hello"}, 0);
+        assertThat(argumentArray.size(), is(1));
+        assertThat(argumentArray.get(0), instanceOf(String[].class));
+        assertThat((String[]) argumentArray.get(0), arrayWithSize(1));
+        assertThat((String[]) argumentArray.get(0), is(new String[]{"hello"}));
+    }
+
+    @Test
+    public void testVarArgsCommandArgumentParsingDeeper() {
+        List<Object> argumentArray = new ArrayList<>();
+        varArgCommandPart.generateArgumentArray(argumentArray, new TestCommandSender(), new String[]{"hello", "world", "hello", "world"}, 0);
+        assertThat(argumentArray.size(), is(1));
+        assertThat(argumentArray.get(0), instanceOf(String[].class));
+        assertThat((String[]) argumentArray.get(0), arrayWithSize(4));
+        assertThat((String[]) argumentArray.get(0), is(new String[]{"hello", "world", "hello", "world"}));
+    }
+
     @Test
     public void testGuardCommandExecute() {
         List<Object> argumentArray = new ArrayList<>();