Create TestLargeString.java

src/test/java/com/fasterxml/jackson/core/read/TestLargeString.java

@@ -0,0 +1,48 @@
+package com.fasterxml.jackson.core.read;
+
+import com.fasterxml.jackson.core.JUnit5TestBase;
+import com.fasterxml.jackson.core.JsonFactory;
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.StreamReadConstraints;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+// https://github.com/FasterXML/jackson-core/pull/1350
+class TestLargeString extends JUnit5TestBase {
+
+  // disabled because it takes too much memory to run
+  @Disabled
+  @Test
+  void testLargeStringDeserialization() throws Exception {
+    final int len = Integer.MAX_VALUE - 1024;
+    final byte[] largeByteString = makeLongByteString(len);
+    final JsonFactory f = JsonFactory.builder()
+        .streamReadConstraints(StreamReadConstraints.builder()
+            .maxStringLength(Integer.MAX_VALUE)
+            .build())
+        .build();
+
+    try (JsonParser parser = f.createParser(largeByteString)) {
+      final String parsedString = parser.nextTextValue();
+      assertEquals(len, parsedString.length());
+      for (int i = 0; i < len; i++) {
+        assertEquals('a', parsedString.charAt(i));
+      }
+    }
+
+  }
+
+  private byte[] makeLongByteString(int length) {
+    final byte[] result = new byte[length + 2];
+    final byte b = 'a';
+    final int last = length + 1;
+    result[0] = '\"';
+    for (int i = 1; i < last; i++) {
+      result[i] = b;
+    }
+    result[last] = result[0];
+    return result;
+  }
+}