bug fix issue google#2769

Author: IlCommittatoreCasa

gson/src/main/java/com/google/gson/stream/JsonReader.java

@@ -1172,6 +1172,7 @@ private String nextUnquotedValue() throws IOException {
     while (true) {
       for (; pos + i < limit; i++) {
         switch (buffer[pos + i]) {
+          case '"':
           case '/':
           case '\\':
           case ';':

gson/src/test/java/com/google/gson/stream/JsonReaderTest.java

@@ -29,11 +29,17 @@
 import static org.junit.Assert.assertThrows;
 
 import com.google.gson.Strictness;
+import com.google.gson.internal.bind.TypeAdapters;
+
 import java.io.EOFException;
 import java.io.IOException;
 import java.io.Reader;
 import java.io.StringReader;
+import java.io.StringWriter;
 import java.util.Arrays;
+import java.util.Iterator;
+import java.util.stream.Stream;
+
 import org.junit.Ignore;
 import org.junit.Test;
 
@@ -2189,4 +2195,25 @@ private static Reader reader(String s) {
       }
     }; */
   }
+  
+  	@Test
+	public void testJsonReaderWithStrictnessSetToLenientAndNullValue() throws IOException {
+		Iterator<String> iterator = Stream.of(null, "value1", "value2").iterator();
+		StringWriter str = new StringWriter();
+
+		try (JsonWriter writer = new JsonWriter(str)) {
+			writer.setStrictness(Strictness.LENIENT);
+			while (iterator.hasNext()) {
+				TypeAdapters.STRING.write(writer, iterator.next());
+			}
+			writer.flush();
+		}
+
+		JsonReader reader = new JsonReader(new StringReader(str.toString()));
+		reader.setStrictness(Strictness.LENIENT);
+
+		assertThat(TypeAdapters.STRING.read(reader)).isEqualTo("null");
+		assertThat(TypeAdapters.STRING.read(reader)).isEqualTo("value1");
+		assertThat(TypeAdapters.STRING.read(reader)).isEqualTo("value2");
+	}
 }