Add test for setdigest functions

core/trino-main/src/test/java/io/trino/sql/query/TestSetDigestFunctions.java

@@ -0,0 +1,74 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.trino.sql.query;
+
+import org.testng.annotations.AfterClass;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class TestSetDigestFunctions
+{
+    private QueryAssertions assertions;
+
+    @BeforeClass
+    public void init()
+    {
+        assertions = new QueryAssertions();
+    }
+
+    @AfterClass(alwaysRun = true)
+    public void teardown()
+    {
+        assertions.close();
+        assertions = null;
+    }
+
+    @Test
+    public void testCardinality()
+    {
+        assertThat(assertions.query(
+                "SELECT cardinality(make_set_digest(value)) " +
+                        "FROM (VALUES 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5) T(value)"))
+                .matches("VALUES CAST(5 AS BIGINT)");
+    }
+
+    @Test
+    public void testExactIntersectionCardinality()
+    {
+        assertThat(assertions.query(
+                "SELECT intersection_cardinality(make_set_digest(v1), make_set_digest(v2)) " +
+                        "FROM (VALUES (1, 1), (NULL, 2), (2, 3), (3, 4)) T(v1, v2)"))
+                .matches("VALUES CAST(3 AS BIGINT)");
+    }
+
+    @Test
+    public void testJaccardIndex()
+    {
+        assertThat(assertions.query(
+                "SELECT jaccard_index(make_set_digest(v1), make_set_digest(v2)) " +
+                        "FROM (VALUES (1, 1), (NULL,2), (2, 3), (NULL, 4)) T(v1, v2)"))
+                .matches("VALUES CAST(0.5 AS DOUBLE)");
+    }
+
+    @Test
+    public void hashCounts()
+    {
+        assertThat(assertions.query(
+                "SELECT hash_counts(make_set_digest(value)) " +
+                        "FROM (VALUES 1, 1, 1, 2, 2) T(value)"))
+                .matches("VALUES map(cast(ARRAY[19144387141682250, -2447670524089286488] AS array(bigint)), cast(ARRAY[3, 2] AS array(smallint)))");
+    }
+}