Create NonBlockingDeserTest.java (#5002)

Author: pjfanning

src/test/java/tools/jackson/databind/deser/NonBlockingDeserTest.java

@@ -0,0 +1,50 @@
+package tools.jackson.databind.deser;
+
+import org.junit.jupiter.api.Test;
+import tools.jackson.core.JsonParser;
+import tools.jackson.core.ObjectReadContext;
+import tools.jackson.core.async.ByteBufferFeeder;
+import tools.jackson.databind.DeserializationFeature;
+import tools.jackson.databind.ObjectMapper;
+import tools.jackson.databind.json.JsonMapper;
+
+import java.nio.ByteBuffer;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * Tests for checking that test deserialization with non-blocking parsers
+ */
+public class NonBlockingDeserTest
+{
+    record Foo(String bar) {}
+
+    /*
+    /**********************************************************
+    /* Test methods
+    /**********************************************************
+     */
+
+    @Test
+    public void testNonBlockingParser()
+    {
+        final ObjectMapper m = JsonMapper.builder()
+            //.disable(DeserializationFeature.FAIL_ON_TRAILING_TOKENS)
+            .build();
+        final JsonParser parser =
+            m.tokenStreamFactory().createNonBlockingByteBufferParser(ObjectReadContext.empty());
+        final int len = 10;
+        Foo[] foos = new Foo[len];
+        for (int i = 0; i < len; ++i) {
+            foos[i] = new Foo("bar-" + i);
+        }
+        try {
+          ((ByteBufferFeeder) parser).feedInput(ByteBuffer.wrap(m.writeValueAsBytes(foos)));
+          ((ByteBufferFeeder) parser).endOfInput();
+          final Foo[] result = m.readValue(parser, Foo[].class);
+          assertEquals(len, result.length);
+        } finally {
+          parser.close();
+        }
+    }
+}