new Testfile and first implementation of new test cases.

src/main/java/net/sf/jabref/importer/ImportFormatReader.java

@@ -131,13 +131,18 @@ public List<BibtexEntry> importFromFile(String format, String filename, OutputPr
     public List<BibtexEntry> importFromFile(ImportFormat importer, String filename, OutputPrinter status) throws IOException {
         File file = new File(filename);
 
-        try (InputStream stream = new FileInputStream(file)) {
+        try (InputStream stream = new FileInputStream(file);
+                BufferedInputStream bis = new BufferedInputStream(stream)) {
 
-            if (!importer.isRecognizedFormat(stream)) {
+            bis.mark(Integer.MAX_VALUE);
+
+            if (!importer.isRecognizedFormat(bis)) {
                 throw new IOException("Wrong file format");
             }
 
-            return importer.importEntries(stream, status);
+            bis.reset();
+
+            return importer.importEntries(bis, status);
         }
     }
 

src/test/java/net/sf/jabref/importer/fileformat/MedlinePlainImporterTest.java

@@ -10,6 +10,7 @@
 
 import net.sf.jabref.Globals;
 import net.sf.jabref.JabRefPreferences;
+import net.sf.jabref.bibtex.BibtexEntryAssert;
 import net.sf.jabref.importer.OutputPrinterToNull;
 import net.sf.jabref.model.entry.BibtexEntry;
 
@@ -53,7 +54,7 @@ public void testIsRecognizedFormat() throws Exception {
 
         //Test with txt File which is in recognized Format
         Assert.assertTrue(importer.isRecognizedFormat(MedlinePlainImporter.class
-                .getResourceAsStream("MedlinePLainImporterTest.txt")));
+                .getResourceAsStream("MedlinePlainImporterTest.txt")));
 
     }
 
@@ -62,7 +63,7 @@ public void testImportEntries() throws Exception {
 
         //create entries list from the txt file
         List<BibtexEntry> entries = importer.importEntries(
-                MedlinePlainImporter.class.getResourceAsStream("MedlinePLainImporterTest.txt"),
+                MedlinePlainImporter.class.getResourceAsStream("MedlinePlainImporterTest.txt"),
                 new OutputPrinterToNull());
         Assert.assertEquals(7, entries.size());
 
@@ -78,13 +79,31 @@ public void testImportEntries() throws Exception {
         Assert.assertEquals("06", test2.getField("month"));
         Assert.assertNull(test2.getField("author"));
         Assert.assertNull(test2.getField("title"));
+    }
 
+    @Test
+    public void testEmptyImport() throws Exception {
         //Test entries with empty txt File
         List<BibtexEntry> emptyEntries = importer.importEntries(
-                MedlinePlainImporter.class.getResourceAsStream("MedlinePLainImporterTestEmpty.txt"),
+                MedlinePlainImporter.class.getResourceAsStream("MedlinePlainImporterTestEmpty.txt"),
                 new OutputPrinterToNull());
         Assert.assertEquals(0, emptyEntries.size());
+    }
 
+    @Test
+    public void testSingleEntries() throws Exception {
+        for (int n = 1; n < 6; n++) {
+            try (InputStream is = MedlinePlainImporter.class.getResourceAsStream("MedlinePlainImporterTest" + n
+                    + ".txt");
+                    InputStream nis = MedlinePlainImporter.class.getResourceAsStream("MedlinePlainImporterTestBib" + n
+                            + ".bib")) {
+
+                List<BibtexEntry> entries = importer.importEntries(is, new OutputPrinterToNull());
+                Assert.assertNotNull(entries);
+                Assert.assertEquals(1, entries.size());
+                BibtexEntryAssert.assertEquals(nis, entries.get(0));
+            }
+        }
     }
 
     @Test

src/test/resources/net/sf/jabref/importer/fileformat/MedlinePlainImporterTest1.txt

@@ -0,0 +1,67 @@
+PMID- 20481061
+OWN - NLM
+STAT- MEDLINE
+DA  - 20100520
+DCOM- 20100526
+LR  - 20150731
+IS  - 0955-2359 (Print)
+IS  - 0955-2359 (Linking)
+VI  - 20
+IP  - 4
+DP  - 2009
+TI  - From danger and motherhood to health and beauty: health advice for the factory
+      girl in early twentieth-century Britain.
+PG  - 454-81
+AB  - A survey of government reports and the archives and journals of other agencies
+      interested in industrial health in early twentieth-century Britain has led us to 
+      conclude that, in addition to apprehension about the potentially harmful impact
+      of industrial work on the reproductive health of women, there was a great deal of
+      interest in the health of young, unmarried girls in the workplace, particularly
+      the factory. Adopting a broader time frame, we suggest that the First World War, 
+      with its emphasis on the reproductive health of women, was an anomalous
+      experience in a broader trend which stressed the growing acceptability of women's
+      work within industry. Concern with girls' health and welfare embraced hygiene,
+      diet, exercise, recreation, fashion and beauty within and outside of the
+      workplace, as well as the impact of the boredom and monotony associated with
+      industrial work. The health problems of young women workers tended to be
+      associated with behaviour and environment rather than biology, as were anxieties 
+      about the impact of work on morals, habits and character. Efforts to ensure that 
+      young female factory workers would be equipped to take their place as citizens
+      and parents, we argue, often dovetailed rather than diverged with the 'boy
+      labour' question.
+FAU - Long, Vicky
+AU  - Long V
+AD  - Centre for the History of Science, Technology and Medicine, University of
+      Manchester. [email protected]
+FAU - Marland, Hilary
+AU  - Marland H
+LA  - eng
+GR  - /076053/Z/04/Z/Wellcome Trust/United Kingdom
+GR  - 076053/Wellcome Trust/United Kingdom
+PT  - Historical Article
+PT  - Journal Article
+PT  - Research Support, Non-U.S. Gov't
+PL  - England
+TA  - 20 Century Br Hist
+JT  - 20 century British history
+JID - 9015384
+SB  - QIS
+MH  - Attitude to Health
+MH  - Employment/psychology
+MH  - Female
+MH  - Gender Identity
+MH  - Great Britain
+MH  - History, 20th Century
+MH  - Humans
+MH  - Occupational Health/*history
+MH  - Reproductive Medicine/*history
+MH  - Women, Working/*history/psychology
+PMC - PMC4513071
+MID - EMS54115
+OID - NLM: EMS54115
+OID - NLM: PMC4513071
+EDAT- 2009/01/01 00:00
+MHDA- 2010/05/27 06:00
+CRDT- 2010/05/21 06:00
+PST - ppublish
+SO  - 20 Century Br Hist. 2009;20(4):454-81.

src/test/resources/net/sf/jabref/importer/fileformat/MedlinePlainImporterTest2.txt

@@ -0,0 +1,19 @@
+PMC -22664230
+TI-
+BTI -    
+FAU -
+FED - Some Editor
+PT  - Clinical Conference
+FED - Some test data
+JT  - Test Journal
+PG  -
+PL  - 
+IS  -
+VI  -
+AB  - Old Abstract
+AB  - new abstract
+DP  - 2013 06 10
+MH  -
+AID -
+CON - First Comment
+CIN - Different Comment

src/test/resources/net/sf/jabref/importer/fileformat/MedlinePlainImporterTest3.txt

@@ -0,0 +1,5 @@
+PMCR- 20481061
+TI  - This is a Testtitle
+TI  - This title should be appended:
+TI  - This title should also be appended
+PT  - Book

src/test/resources/net/sf/jabref/importer/fileformat/MedlinePlainImporterTest4.txt

@@ -0,0 +1,3 @@
+PMID-22664220
+PT  - Technical Report
+AID - doi:10.1016/j.cpr.2005.02.002

src/test/resources/net/sf/jabref/importer/fileformat/MedlinePlainImporterTest5.txt

@@ -0,0 +1,3 @@
+PMID-22664238
+PT  - Editorial
+JT  - Inproceedings book title

src/test/resources/net/sf/jabref/importer/fileformat/MedlinePlainImporterTest6.txt

@@ -0,0 +1,2 @@
+PMID-96578310
+PT  - Overall

src/test/resources/net/sf/jabref/importer/fileformat/MedlinePlainImporterTest7.txt

@@ -0,0 +1,2 @@
+PMID-45984220
+PT  -  

src/test/resources/net/sf/jabref/importer/fileformat/MedlinePlainImporterTestBib1.bib

@@ -0,0 +1,12 @@
+@Article{LongMarland2009,
+  Title                    = {From danger and motherhood to health and beauty: health advice for the factory girl in early twentieth-century Britain.},
+  Author                   = {Long, Vicky and Marland, Hilary},
+  Journal                  = {20 century British history},
+  Year                     = {2009},
+  Pages                    = {454-81},
+  Volume                   = {20},
+  Abstract                 = {A survey of government reports and the archives and journals of other agencies interested in industrial health in early twentieth-century Britain has led us to conclude that, in addition to apprehension about the potentially harmful impact of industrial work on the reproductive health of women, there was a great deal of interest in the health of young, unmarried girls in the workplace, particularly the factory. Adopting a broader time frame, we suggest that the First World War, with its emphasis on the reproductive health of women, was an anomalous experience in a broader trend which stressed the growing acceptability of women's work within industry. Concern with girls' health and welfare embraced hygiene, diet, exercise, recreation, fashion and beauty within and outside of the workplace, as well as the impact of the boredom and monotony associated with industrial work. The health problems of young women workers tended to be associated with behaviour and environment rather than biology, as were anxieties about the impact of work on morals, habits and character. Efforts to ensure that young female factory workers would be equipped to take their place as citizens and parents, we argue, often dovetailed rather than diverged with the 'boy labour' question.},
+  Address                  = {England},
+  ISSN                     = {0955-2359 (Linking)},
+  Keywords                 = {Attitude to Health, Employment/psychology, Female, Gender Identity, Great Britain, History, 20th Century, Humans, Occupational Health/*history, Reproductive Medicine/*history, Women, Working/*history/psychology}
+}

src/test/resources/net/sf/jabref/importer/fileformat/MedlinePlainImporterTestBib2.bib

@@ -0,0 +1,9 @@
+@Conference{Editor2013,
+  Year                     = {2013},
+  Editor                   = {Editor, Some and test data, Some},
+  Month                    = {06},
+  Abstract                 = {Old Abstract
+new abstract},
+  Comment                  = {First Comment Different Comment},
+  Journal                  = {Test Journal}
+}

src/test/resources/net/sf/jabref/importer/fileformat/MedlinePlainImporterTestBib3.bib

@@ -0,0 +1,3 @@
+@Book{,
+  Title                    = {This is a Testtitle: This title should be appended: This title should also be appended}
+}

src/test/resources/net/sf/jabref/importer/fileformat/MedlinePlainImporterTestBib4.bib

@@ -0,0 +1,3 @@
+@TechReport{,
+  DOI                      = {10.1016/j.cpr.2005.02.002}
+}

src/test/resources/net/sf/jabref/importer/fileformat/MedlinePlainImporterTestBib5.bib

@@ -0,0 +1,3 @@
+@InProceedings{,
+  Booktitle                = {Inproceedings book title}
+}