Add ColonCommandCompletionTest, #654

reader/src/test/java/org/jline/reader/impl/ColonCommandCompletionTest.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2002-2021, the original author or authors.
+ *
+ * This software is distributable under the BSD license. See the terms of the
+ * BSD license in the documentation provided with this software.
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ */
+package org.jline.reader.impl;
+
+import org.jline.reader.Candidate;
+import org.jline.reader.Completer;
+import org.jline.reader.LineReader;
+import org.jline.reader.ParsedLine;
+import org.jline.utils.AttributedString;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.util.List;
+
+public class ColonCommandCompletionTest extends ReaderTestSupport {
+
+    @Test
+    public void testColonCommandCompletion() throws IOException {
+        reader.setCompleter(new ColonCommandCompleter("power", "paste"));
+        assertBuffer(":paste", new TestBuffer(":p\t\t"));
+        assertBuffer(":power ", new TestBuffer(":po\t"));
+    }
+
+    private static class ColonCommandCompleter implements Completer {
+        String[] commands;
+
+        public ColonCommandCompleter(String... commands) {
+            this.commands = commands;
+        }
+
+        @Override
+        public void complete(LineReader reader, ParsedLine line, List<Candidate> candidates) {
+            for (String c : commands) {
+                candidates.add(new Candidate(":" + AttributedString.stripAnsi(c), c, null, null
+                        , null, null, true));
+            }
+        }
+    }
+}