add basic History tests

Author: Vladimir Kotal

opengrok-indexer/src/test/java/org/opengrok/indexer/history/HistoryTest.java

@@ -0,0 +1,73 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * See LICENSE.txt included in this distribution for the specific
+ * language governing permissions and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at LICENSE.txt.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ */
+package org.opengrok.indexer.history;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Date;
+import java.util.List;
+import java.util.Set;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+
+public class HistoryTest {
+    private final List<HistoryEntry> entries = List.of(
+            new HistoryEntry("84599b3c", new Date(1485438707000L),
+                    "Kryštof Tulinger <[email protected]>", null,
+                    "    renaming directories\n\n", true,
+                    Set.of("/git/moved2/renamed2.c")),
+            new HistoryEntry("67dfbe26", new Date(1485263397000L),
+                    "Kryštof Tulinger <[email protected]>", null,
+                    "    renaming renamed -> renamed2\n\n", true,
+                    Set.of("/git/moved/renamed2.c")));
+
+    @Test
+    public void testEqualsRenamed() {
+        History history = new History(entries, List.of("moved/renamed2.c", "moved2/renamed2.c", "moved/renamed.c"));
+        History historyNoRenames = new History(entries);
+        assertNotEquals(history, historyNoRenames);
+    }
+
+    @Test
+    public void testEquals() {
+        History history = new History(entries);
+        assertEquals(2, history.getHistoryEntries().size());
+        History historySmaller = new History(entries.subList(1, 2));
+        assertEquals(1, historySmaller.getHistoryEntries().size());
+        assertNotEquals(history, historySmaller);
+    }
+
+    @Test
+    public void testToString() {
+        History history = new History(entries);
+        String expectedString = "[84599b3c Thu Jan 26 14:51:47 CET 2017 Kryštof Tulinger <[email protected]>     renaming directories\n" +
+                "\n" +
+                "\n" +
+                ", 67dfbe26 Tue Jan 24 14:09:57 CET 2017 Kryštof Tulinger <[email protected]>     renaming renamed -> renamed2\n" +
+                "\n" +
+                "\n" +
+                "], renamed files: []";
+        assertEquals(expectedString, history.toString());
+    }
+}