diff --git a/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformStringFunctionsProcessor.java b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformStringFunctionsProcessor.java
deleted file mode 100644
index e69de29bb2d..00000000000
diff --git a/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/string/TestRegexpMatchesFunction.java b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/string/TestRegexpMatchesFunction.java
new file mode 100644
index 00000000000..fc717857eae
--- /dev/null
+++ b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/string/TestRegexpMatchesFunction.java
@@ -0,0 +1,75 @@
+package org.apache.inlong.sdk.transform.process.function.string;
+
+import org.apache.inlong.sdk.transform.decode.SourceDecoderFactory;
+import org.apache.inlong.sdk.transform.encode.SinkEncoderFactory;
+import org.apache.inlong.sdk.transform.pojo.TransformConfig;
+import org.apache.inlong.sdk.transform.process.TransformProcessor;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.HashMap;
+import java.util.List;
+
+public class TestRegexpMatchesFunction extends AbstractFunctionStringTestBase{
+    @Test
+    public void testRegexpMatchesFunction() throws Exception {
+        String transformSql1 = "select regexp_matches(string1,string2) from source";
+        TransformConfig config1 = new TransformConfig(transformSql1);
+        TransformProcessor<String, String> processor1 = TransformProcessor
+                .create(config1, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        // case1: regexp_matches("The quick brown fox", "quick")
+        List<String> output1 = processor1.transform("The quick brown fox|quick|5|2|1|3", new HashMap<>());
+        Assert.assertEquals(1, output1.size());
+        Assert.assertEquals(output1.get(0), "result=[{\"quick\"}]");
+        String transformSql2 = "select regexp_matches(string1,string2) from source";
+        TransformConfig config2 = new TransformConfig(transformSql2);
+        TransformProcessor<String, String> processor2 = TransformProcessor
+                .create(config2, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        // case2: regexp_matches("User: Alice, ID: 12345", "User: (\\w+), ID: (\\d+)")
+        List<String> output2 =
+                processor2.transform("User: Alice, ID: 12345|User: (\\\\w+), ID: (\\\\d+)|5|2|1|3", new HashMap<>());
+        Assert.assertEquals(1, output2.size());
+        Assert.assertEquals(output2.get(0), "result=[{\"Alice\",\"12345\"}]");
+        // case3: regexp_matches("User: Alice, ID: 12345User: Alice, ID: 12345;
+        // User: Bob, ID: 67890", "User: (\\w+), ID: (\\d+)")
+        List<String> output3 =
+                processor2.transform("User: Alice, ID: 12345|User: (\\\\w+), ID: (\\\\d+)|5|2|1|3", new HashMap<>());
+        Assert.assertEquals(1, output3.size());
+        Assert.assertEquals(output3.get(0), "result=[{\"Alice\",\"12345\"}]");
+        String transformSql3 = "select regexp_matches(string1,string2,string3) from source";
+        TransformConfig config3 = new TransformConfig(transformSql3);
+        TransformProcessor<String, String> processor3 = TransformProcessor
+                .create(config3, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        // case4: regexp_matches("foo 123 bar 456", "\\d+", "g")
+        List<String> output4 = processor3.transform("foo 123 bar 456|\\\\d+|g|2|1|3", new HashMap<>());
+        Assert.assertEquals(1, output4.size());
+        Assert.assertEquals(output4.get(0), "result=[{\"123\"},{\"456\"}]");
+        // case5: regexp_matches("User: Alice, ID: 12345User: Alice, ID: 12345;
+        // User: Bob, ID: 67890", "User: (\\w+),ID: (\\d+)", "g")
+        List<String> output5 = processor3.transform(
+                "User: Alice, ID: 12345; User: Bob, ID: 67890|User: (\\\\w+), ID: (\\\\d+)|g|2|1|3", new HashMap<>());
+        Assert.assertEquals(1, output5.size());
+        Assert.assertEquals(output5.get(0), "result=[{\"Alice\",\"12345\"},{\"Bob\",\"67890\"}]");
+        String transformSql4 = "select regexp_matches(string1,string2,string3) from source";
+        TransformConfig config4 = new TransformConfig(transformSql4);
+        TransformProcessor<String, String> processor4 = TransformProcessor
+                .create(config4, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        // case6: regexp_matches("Hello! hello World", "hello", "ig")
+        List<String> output6 = processor4.transform("Hello! hello World|hello|ig|2|1|3", new HashMap<>());
+        Assert.assertEquals(1, output6.size());
+        Assert.assertEquals(output6.get(0), "result=[{\"Hello\"},{\"hello\"}]");
+        String transformSql5 = "select regexp_matches(string1,string2,string3) from source";
+        TransformConfig config5 = new TransformConfig(transformSql5);
+        TransformProcessor<String, String> processor5 = TransformProcessor
+                .create(config5, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        // case7: regexp_matches("First line\nSecond line", "^Second", "m")
+        List<String> output7 = processor5.transform("First line\\\nSecond line|^Second|m|2|1|3", new HashMap<>());
+        Assert.assertEquals(1, output7.size());
+        Assert.assertEquals(output7.get(0), "result=[{\"Second\"}]");
+    }
+}