Add org.apache.commons.csv.CSVParserTest.testGetOneLineOneParser(). See discussion in [CSV-110].

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1585491 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/test/java/org/apache/commons/csv/CSVParserTest.java

@@ -31,6 +31,8 @@
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStreamReader;
+import java.io.PipedReader;
+import java.io.PipedWriter;
 import java.io.Reader;
 import java.io.StringReader;
 import java.io.StringWriter;
@@ -69,6 +71,8 @@ public class CSVParserTest {
 
     private static final String CSV_INPUT_1 = "a,b,c,d";
 
+    private static final String CSV_INPUT_2 = "a,b,1 2";
+
     private static final String[][] RESULT = {
             {"a", "b", "c", "d"},
             {"a", "b", "1 2"},
@@ -530,6 +534,29 @@ public void testGetOneLineCustomCollection() throws IOException {
         parser.close();
     }
 
+    /**
+     * Tests reusing a parser to process new string records one at a time as they are being discovered. See [CSV-110].
+     * 
+     * @throws IOException
+     */
+    @Test
+    public void testGetOneLineOneParser() throws IOException {
+        PipedWriter writer = new PipedWriter();
+        PipedReader reader = new PipedReader(writer);
+        final CSVFormat format = CSVFormat.DEFAULT;
+        final CSVParser parser = new CSVParser(reader, format);
+        try {
+            writer.append(CSV_INPUT_1 + format.getRecordSeparator());
+            final CSVRecord record1 = parser.nextRecord();
+            assertArrayEquals(RESULT[0], record1.values());
+            writer.append(CSV_INPUT_2 + format.getRecordSeparator());
+            final CSVRecord record2 = parser.nextRecord();
+            assertArrayEquals(RESULT[1], record2.values());
+        } finally {
+            parser.close();
+        }
+    }
+
     @Test
     public void testGetRecordNumberWithCR() throws Exception {
         this.validateRecordNumbers(String.valueOf(CR));