1 files changed, 96 insertions, 0 deletions
diff --git a/src/test/java/org/apache/commons/lang3/time/GmtTimeZoneTest.java b/src/test/java/org/apache/commons/lang3/time/GmtTimeZoneTest.java
new file mode 100644
index 000000000..ede51b8f3
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+++ b/src/test/java/org/apache/commons/lang3/time/GmtTimeZoneTest.java
@@ -0,0 +1,96 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.lang3.time;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.apache.commons.lang3.AbstractLangTest;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Tests for GmtTimeZone
+ */
+public class GmtTimeZoneTest extends AbstractLangTest {
+
+    @Test
+    public void getID() {
+        assertEquals("GMT+00:00", new GmtTimeZone(false, 0, 0).getID());
+        assertEquals("GMT+01:02", new GmtTimeZone(false, 1, 2).getID());
+        assertEquals("GMT+11:22", new GmtTimeZone(false, 11, 22).getID());
+        assertEquals("GMT-01:02", new GmtTimeZone(true, 1, 2).getID());
+        assertEquals("GMT-11:22", new GmtTimeZone(true, 11, 22).getID());
+    }
+
+    @Test
+    public void getOffset() {
+        assertEquals(0, new GmtTimeZone(false, 0, 0).getOffset(234304));
+    }
+
+    @Test
+    public void getRawOffset() {
+        assertEquals(0, new GmtTimeZone(false, 0, 0).getRawOffset());
+    }
+
+    @Test
+    public void hoursInRange() {
+        assertEquals(23 * 60 * 60 * 1000, new GmtTimeZone(false, 23, 0).getRawOffset());
+    }
+
+    @Test
+    public void hoursOutOfRange() {
+        assertThrows(IllegalArgumentException.class, () -> new GmtTimeZone(false, 24, 0));
+    }
+
+    @Test
+    public void inDaylightTime() {
+        assertFalse(new GmtTimeZone(false, 0, 0).useDaylightTime());
+    }
+
+    @Test
+    public void minutesInRange() {
+        assertEquals(59 * 60 * 1000, new GmtTimeZone(false, 0, 59).getRawOffset());
+    }
+
+    @Test
+    public void minutesOutOfRange() {
+        assertThrows(IllegalArgumentException.class, () -> new GmtTimeZone(false, 0, 60));
+    }
+
+    @Test
+    public void setRawOffset() {
+        assertThrows(UnsupportedOperationException.class, () -> new GmtTimeZone(false, 0, 0).setRawOffset(0));
+    }
+
+    @Test
+    public void testGetOffset() {
+        assertEquals(-(6 * 60 + 30) * 60 * 1000,
+            new GmtTimeZone(true, 6, 30).getOffset(1, 1, 1, 1, 1, 1));
+    }
+
+    @Test
+    public void testToString() {
+        assertEquals("[GmtTimeZone id=\"GMT-12:00\",offset=-43200000]",
+            new GmtTimeZone(true, 12, 0).toString());
+    }
+
+    @Test
+    public void useDaylightTime() {
+        assertFalse(new GmtTimeZone(false, 0, 0).useDaylightTime());
+    }
+}