[CSV-148] Add testcases about withIgnoreSurroundingSpaces() and withTrim() (#70)

src/test/java/org/apache/commons/csv/issues/JiraCsv148Test.java

@@ -0,0 +1,55 @@
+/*
+ * 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.csv.issues;
+
+import org.apache.commons.csv.CSVFormat;
+import org.apache.commons.csv.QuoteMode;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+public class JiraCsv148Test {
+
+    /**
+     * The difference between withTrim()and withIgnoreSurroundingSpace()：
+     * difference:  withTrim() can remove the leading and trailing spaces and newlines in quotation marks,
+     * while withIgnoreSurroundingSpace() cannot
+     * The same point: you can remove the leading and trailing spaces,tabs and other symbols.
+     */
+    @Test
+    public void testWithTrimEmpty() throws Exception {
+        final CSVFormat format = CSVFormat.DEFAULT.withQuoteMode(QuoteMode.ALL).withTrim();
+        assertEquals("\"\",\"\",\"Single space on the left\",\"Single space on the right\"," +
+                        "\"Single spaces on both sides\",\"Multiple spaces on the left\"," +
+                        "\"Multiple spaces on the right\",\"Multiple spaces on both sides\"",
+                format.format("", " ", " Single space on the left", "Single space on the right ",
+                        " Single spaces on both sides ", "   Multiple spaces on the left",
+                        "Multiple spaces on the right   ", "  Multiple spaces on both sides     "));
+    }
+
+    @Test
+    public void testWithIgnoreSurroundingSpacesEmpty() throws Exception {
+        final CSVFormat format = CSVFormat.DEFAULT.withQuoteMode(QuoteMode.ALL).withIgnoreSurroundingSpaces();
+        assertEquals("\"\",\" \",\" Single space on the left\",\"Single space on the right \"," +
+                        "\" Single spaces on both sides \",\"   Multiple spaces on the left\"," +
+                        "\"Multiple spaces on the right   \",\"  Multiple spaces on both sides     \"",
+                format.format("", " ", " Single space on the left", "Single space on the right ",
+                        " Single spaces on both sides ", "   Multiple spaces on the left",
+                        "Multiple spaces on the right   ", "  Multiple spaces on both sides     "));
+    }
+}