Implement test-cases to test the handling of empty input

diff --git a/src/test/java/de/juplo/jackson/SimpleMapperTest.java b/src/test/java/de/juplo/jackson/SimpleMapperTest.java
new file mode 100644 (file)
index 0000000..075acca
--- /dev/null
+++ b/src/test/java/de/juplo/jackson/SimpleMapperTest.java
@@ -0,0 +1,168 @@
+package de.juplo.jackson;
+
+import com.fasterxml.jackson.core.JsonFactory;
+import com.fasterxml.jackson.core.JsonParser;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Spliterator;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.fail;
+import org.junit.Test;
+
+
+/**
+ *
+ * @author Kai Moritz
+ */
+public class SimpleMapperTest
+{
+  private final JsonFactory factory = new JsonFactory();
+
+
+  @Test
+  public void testConvertEmptyInputToArraySpliterator() throws Exception
+  {
+    Spliterator<Object> spliterator;
+
+    spliterator = SimpleMapper.getArraySpliterator(get("/empty/1.json"));
+    assertFalse(
+        "The created splitter should have no entries",
+        spliterator.tryAdvance((Object t) ->
+        {
+          fail("The consumer should never be called!");
+        }));
+    spliterator = SimpleMapper.getArraySpliterator(get("/empty/2.json"));
+    assertFalse(
+        "The created splitter should have no entries",
+        spliterator.tryAdvance((Object t) ->
+        {
+          fail("The consumer should never be called!");
+        }));
+    spliterator = SimpleMapper.getArraySpliterator(get("/empty/3.json"));
+    assertFalse(
+        "The created splitter should have no entries",
+        spliterator.tryAdvance((Object t) ->
+        {
+          fail("The consumer should never be called!");
+        }));
+    spliterator = SimpleMapper.getArraySpliterator(get("/empty/4.json"));
+    assertFalse(
+        "The created splitter should have no entries",
+        spliterator.tryAdvance((Object t) ->
+        {
+          fail("The consumer should never be called!");
+        }));
+    spliterator = SimpleMapper.getArraySpliterator(get("/empty/5.json"));
+    assertFalse(
+        "The created splitter should have no entries",
+        spliterator.tryAdvance((Object t) ->
+        {
+          fail("The consumer should never be called!");
+        }));
+  }
+
+  @Test
+  public void testConvertEmptyInputToList() throws Exception
+  {
+    List<Object> list;
+
+    list = SimpleMapper.convertArray(get("/empty/1.json"));
+    assertEquals(0, list.size());
+    list = SimpleMapper.convertArray(get("/empty/2.json"));
+    assertEquals(0, list.size());
+    list = SimpleMapper.convertArray(get("/empty/3.json"));
+    assertEquals(0, list.size());
+    list = SimpleMapper.convertArray(get("/empty/4.json"));
+    assertEquals(0, list.size());
+    list = SimpleMapper.convertArray(get("/empty/5.json"));
+    assertEquals(0, list.size());
+  }
+
+  @Test
+  public void testConvertEmptyInputToObjectSpliterator() throws Exception
+  {
+    Spliterator<Entry<String, Object>> spliterator;
+
+    spliterator = SimpleMapper.getObjectSpliterator(get("/empty/1.json"));
+    assertFalse(
+        "The created splitter should have no entries",
+        spliterator.tryAdvance((Entry<String, Object> e) ->
+        {
+          fail("The consumer should never be called!");
+        }));
+    spliterator = SimpleMapper.getObjectSpliterator(get("/empty/2.json"));
+    assertFalse(
+        "The created splitter should have no entries",
+        spliterator.tryAdvance((Entry<String, Object> e) ->
+        {
+          fail("The consumer should never be called!");
+        }));
+    spliterator = SimpleMapper.getObjectSpliterator(get("/empty/3.json"));
+    assertFalse(
+        "The created splitter should have no entries",
+        spliterator.tryAdvance((Entry<String, Object> e) ->
+        {
+          fail("The consumer should never be called!");
+        }));
+    spliterator = SimpleMapper.getObjectSpliterator(get("/empty/4.json"));
+    assertFalse(
+        "The created splitter should have no entries",
+        spliterator.tryAdvance((Entry<String, Object> e) ->
+        {
+          fail("The consumer should never be called!");
+        }));
+    spliterator = SimpleMapper.getObjectSpliterator(get("/empty/5.json"));
+    assertFalse(
+        "The created splitter should have no entries",
+        spliterator.tryAdvance((Entry<String, Object> e) ->
+        {
+          fail("The consumer should never be called!");
+        }));
+  }
+
+  @Test
+  public void testConvertEmptyInputToMap() throws Exception
+  {
+    Map<String, Object> map;
+
+    map = SimpleMapper.convertObject(get("/empty/1.json"));
+    assertEquals(0, map.size());
+    map = SimpleMapper.convertObject(get("/empty/2.json"));
+    assertEquals(0, map.size());
+    map = SimpleMapper.convertObject(get("/empty/3.json"));
+    assertEquals(0, map.size());
+    map = SimpleMapper.convertObject(get("/empty/4.json"));
+    assertEquals(0, map.size());
+    map = SimpleMapper.convertObject(get("/empty/5.json"));
+    assertEquals(0, map.size());
+  }
+
+  @Test
+  public void testConvertEmptyInput() throws Exception
+  {
+    Object object;
+
+    object = SimpleMapper.convert(get("/empty/1.json"));
+    assertNull(object);
+    object = SimpleMapper.convert(get("/empty/2.json"));
+    assertNull(object);
+    object = SimpleMapper.convert(get("/empty/3.json"));
+    assertNull(object);
+    object = SimpleMapper.convert(get("/empty/4.json"));
+    assertNull(object);
+    object = SimpleMapper.convert(get("/empty/5.json"));
+    assertNull(object);
+  }
+
+
+  private JsonParser get(String resource) throws IOException
+  {
+    InputStream is = SimpleMapperTest.class.getResourceAsStream(resource);
+    return factory.createParser(is);
+  }
+}

diff --git a/src/test/resources/empty/1.json b/src/test/resources/empty/1.json
new file mode 100644 (file)
index 0000000..e69de29

diff --git a/src/test/resources/empty/2.json b/src/test/resources/empty/2.json
new file mode 100644 (file)
index 0000000..8d1c8b6
--- /dev/null
+++ b/src/test/resources/empty/2.json
@@ -0,0 +1 @@
+ 

diff --git a/src/test/resources/empty/3.json b/src/test/resources/empty/3.json
new file mode 100644 (file)
index 0000000..09c0ba9
--- /dev/null
+++ b/src/test/resources/empty/3.json
@@ -0,0 +1 @@
+       

diff --git a/src/test/resources/empty/4.json b/src/test/resources/empty/4.json
new file mode 100644 (file)
index 0000000..139597f
--- /dev/null
+++ b/src/test/resources/empty/4.json
@@ -0,0 +1,2 @@
+
+

diff --git a/src/test/resources/empty/5.json b/src/test/resources/empty/5.json
new file mode 100644 (file)
index 0000000..7bec3e6
--- /dev/null
+++ b/src/test/resources/empty/5.json
@@ -0,0 +1,7 @@
+ 
+       
+
+
+       
+
+