Added a few tests for CompletionMatcher

reader/src/main/java/org/jline/reader/impl/LineReaderImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002-2020, the original author or authors.
+ * 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.
@@ -4521,7 +4521,7 @@ else if (isSet(Option.RECOGNIZE_EXACT)) {
         }
     }
 
-    private CompletingParsedLine wrap(ParsedLine line) {
+    protected static CompletingParsedLine wrap(ParsedLine line) {
         if (line instanceof CompletingParsedLine) {
             return (CompletingParsedLine) line;
         } else {

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

@@ -0,0 +1,46 @@
+/*
+ * 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.*;
+import org.junit.Test;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+public class CompletionMatcherTest {
+
+    private CompletionMatcher compileCompletionMatcher(String line) {
+        CompletionMatcher completionMatcher = new CompletionMatcherImpl();
+        Parser parser = new DefaultParser();
+        completionMatcher.compile(new HashMap<>(), false, LineReaderImpl.wrap(parser.parse(line, line.length()))
+                , true, 0, "");
+        return completionMatcher;
+    }
+
+    @Test
+    public void uniqueCandidates() {
+        Candidate c = new Candidate("foo");
+        assertEquals("Expected only one element", 1, compileCompletionMatcher("").matches(Arrays.asList(c, c)).size());
+    }
+
+    @Test
+    public void test() {
+        List<Candidate> candidates = Arrays.asList(new Candidate("foo"), new Candidate("foobar"), new Candidate("bar"));
+        CompletionMatcher completionMatcher = compileCompletionMatcher("foo");
+        List<Candidate> matches = completionMatcher.matches(candidates);
+        assertEquals("Number of matches", 2, matches.size());
+        Candidate candidate = completionMatcher.exactMatch();
+        assertEquals("Exact match", "foo", (candidate != null ? candidate.value() : null));
+        assertEquals("Common prefix", "foo", completionMatcher.getCommonPrefix());
+    }
+}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002-2020, the original author or authors.
+ * 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.
@@ -12,12 +12,8 @@
 import org.junit.Test;
 
 import java.io.IOException;
-import java.util.Arrays;
 import java.util.Map;
 
-import static org.junit.Assert.assertEquals;
-
-
 public class CompletionWithCustomMatcherTest extends ReaderTestSupport {
 
     @Test
@@ -33,8 +29,6 @@ public void compile(Map<LineReader.Option, Boolean> options, boolean prefix, Com
                     // add custom matcher before typo matcher
                     int pos = matchers.size() + (LineReader.Option.COMPLETE_MATCHER_TYPO.isSet(options) ? -1 : 0);
                     matchers.add(pos, simpleMatcher(candidate -> camelMatch(line.word(), 0, candidate, 0)));
-                    Candidate c = new Candidate(line.word());
-                    assertEquals("Expected only one element", 1, matches(Arrays.asList(c, c)).size());
                 }
             }
         });