Fix #174 (or more precisely, refactor test that shows earlier fix)

Author: cowtowncoder

csv/src/test/java/com/fasterxml/jackson/dataformat/csv/deser/SkipEmptyLines191Test.java

@@ -2,22 +2,106 @@
 
 import java.io.Reader;
 import java.io.StringReader;
+import java.io.StringWriter;
 import java.util.List;
 import java.util.Map;
+import java.util.Random;
+
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import com.fasterxml.jackson.databind.MappingIterator;
+import com.fasterxml.jackson.databind.ObjectReader;
 
 import com.fasterxml.jackson.dataformat.csv.CsvMapper;
+import com.fasterxml.jackson.dataformat.csv.CsvParser;
 import com.fasterxml.jackson.dataformat.csv.CsvSchema;
 import com.fasterxml.jackson.dataformat.csv.ModuleTestBase;
 
 // [dataformats-text#191]
+// [dataformats-text#174]
 public class SkipEmptyLines191Test extends ModuleTestBase {
 
-    private static String COL_1 = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
-    private static String COL_2 = "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb";
+    // [dataformats-text#174]
+    @JsonPropertyOrder({ "timestamp", "random" })
+    static class Row174 {
+        private int timestamp;
+        private String random;
+
+        public int getTimestamp() {
+            return timestamp;
+        }
+
+        public void setTimestamp(int timestamp) {
+            this.timestamp = timestamp;
+        }
+
+        public String getRandom() {
+            return random;
+        }
+
+        public void setRandom(String random) {
+            this.random = random;
+        }
+
+        @Override
+        public String toString() {
+            return "Row{timestamp=" + timestamp + ", random='" + random + "'}";
+        }
+    }
+
+    /*
+    /**********************************************************************
+    /* Test methods
+    /**********************************************************************
+     */
+
+    private final static CsvMapper MAPPER = new CsvMapper();
+
+    // [dataformats-text#174]
+    public void testEmptyLines174() throws Exception
+    {
+        final StringWriter sw = new StringWriter(50000);
+        int lineCount = 0;
+        final Random rnd = new Random();
+
+        while (lineCount < 4000) {
+            sw.append("\"" + System.currentTimeMillis()/1000 + "\",\"" + randomString(rnd) + "\"\n");
+            ++lineCount;
+        }
+        final String doc = sw.toString();
+
+        ObjectReader objectReader = MAPPER
+                .enable(CsvParser.Feature.SKIP_EMPTY_LINES)
+                .readerFor(Row174.class)
+                .with(MAPPER.schemaFor(Row174.class));
+
+        MappingIterator<Row174> iterator = objectReader.readValues(doc);
+        Row174 data = null;
+        lineCount = 0;
+        while (iterator.hasNext()) {
+            ++lineCount;
+            try {
+                data = iterator.next();
+            } catch (Exception e) {
+                fail("Failed on row #"+lineCount+", previous row: "+data);
+            }
+        }
+        iterator.close();
+    }
+
+    private String randomString(Random rnd) {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < 10; ++i) {
+            sb.append((char) ('A' + (rnd.nextInt() & 0xF)));
+        }
+        return sb.toString();
+    }
 
     // [dataformats-text#191]: IndexArrayOutOfBounds at 4000
     public void testBigCsvFile() throws Exception
     {
+        final String COL_1 = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
+        final String COL_2 = "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb";
         CsvSchema schema = CsvSchema
                 .emptySchema()
                 .withHeader()
@@ -26,7 +110,7 @@ public void testBigCsvFile() throws Exception
                 .withComments();
 
         try (Reader r = new StringReader(_generate4kDoc())) {
-            List<Map<String, String>> result = new CsvMapper()
+            List<Map<String, String>> result = MAPPER
                     .readerFor(Map.class)
                     .with(schema)
                     .<Map<String, String>>readValues(r)

csv/src/test/java/com/fasterxml/jackson/dataformat/csv/failing/SkipEmptyLines174Test.java

@@ -23,7 +23,7 @@ Fabrice Delhoste (spifd@github)
 
 Thomas Hauk (thauk-copperleaf@github)
 
-* Contibuted #84 (yaml): Add option to allow use of platform-linefeed
+* Contributed #84 (yaml): Add option to allow use of platform-linefeed
   (`YAMLGenerator.Feature.USE_PLATFORM_LINE_BREAKS`)
  (2.9.6)
 
@@ -103,7 +103,6 @@ Jochen Schalanda (joschi@github)
 * Reported #187: Update to SnakeYAML to 1.26 (from 1.24) to address CVE-2017-18640
  (2.10.4)
 
-
 Tyler Carpenter-Rivers (tyler2cr@github)
 #7: Add `CsvParser.Feature.EMPTY_STRING_AS_NULL` to allow coercing empty Strings
   into `null` values
@@ -112,3 +111,8 @@ Tyler Carpenter-Rivers (tyler2cr@github)
 * Reported, constributed fix for #180: (yaml) YAMLGenerator serializes string with special
   chars unquoted when using `MINIMIZE_QUOTES` mode
  (2.11.0)
+
+Yohann BONILLO (ybonillo@github)
+
+* Reported #174: (csv) `CsvParser.Feature.SKIP_EMPTY_LINES` results in a mapping error
+ (2.11.0)

release-notes/CREDITS-2.x

@@ -15,6 +15,8 @@ Modules:
  (contributed by Tyler C-R)
 #115: (csv) JsonProperty index is not honored by CsvSchema builder
  -- actually fixed by [databind#2555]
+#174: (csv) `CsvParser.Feature.SKIP_EMPTY_LINES` results in a mapping error
+ (reported by Yohann B)
 #180: (yaml) YAMLGenerator serializes string with special chars unquoted when
   using `MINIMIZE_QUOTES` mode
  (reported, fix contributed by Timo R)