[common] Improve test converage on BinarySection (#1009)

Author: gyang94

fluss-common/src/test/java/com/alibaba/fluss/row/BinaryStringTest.java

@@ -24,6 +24,7 @@
 import org.junit.jupiter.api.extension.ExtendWith;
 
 import java.math.BigDecimal;
+import java.nio.ByteBuffer;
 import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.List;
@@ -465,4 +466,29 @@ public void testFromBytes() {
         byte[] bytes = Arrays.copyOf(s.getBytes(UTF_8), 10);
         assertThat(fromBytes(bytes, 0, 6)).isEqualTo(BinaryString.fromString(s));
     }
+
+    @TestTemplate
+    public void testBinarySectionFunctions() throws Exception {
+        BinaryString testStr1 = BinaryString.fromString("");
+        BinaryString testStr2 = BinaryString.fromString("");
+
+        BinaryString str = BinaryString.fromString("Hello World");
+        // 1. pointTo
+        testStr1.pointTo(str.getSegments(), 0, 5);
+        assertThat(testStr1.toString()).isEqualTo("Hello");
+
+        testStr2.pointTo(str.getSegments()[0], 6, 5);
+        assertThat(testStr2.toString()).isEqualTo("World");
+        assertThat(testStr2.getOffset()).isEqualTo(6);
+
+        // 2. wrapByteBuffer
+        ByteBuffer byteBuffer = testStr2.wrapByteBuffer();
+        String str2FromByteBuffer = UTF_8.decode(byteBuffer).toString();
+        assertThat(str2FromByteBuffer).isEqualTo("World");
+
+        // 3. equals
+        assertThat(testStr2.equals(testStr2)).isTrue();
+        assertThat(testStr2.equals(null)).isFalse();
+        assertThat(testStr2.equals("World")).isFalse();
+    }
 }

fluss-test-coverage/pom.xml

@@ -252,7 +252,6 @@
                                         <exclude>
                                             com.alibaba.fluss.utils.concurrent.FutureUtils.Timeout
                                         </exclude>
-                                        <exclude>com.alibaba.fluss.row.BinarySection</exclude>
                                         <exclude>com.alibaba.fluss.row.arrow.*</exclude>
                                         <exclude>
                                             com.alibaba.fluss.row.columnar.BytesColumnVector.Bytes