Test a number widened past the UDF surface's function of the same name

src/test/java/org/mobilitydb/spark/SqlSurfaceOverUdfSurfaceTest.java

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+
+package org.mobilitydb.spark;
+
+import functions.GeneratedFunctions;
+import org.apache.spark.sql.SparkSession;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.mobilitydb.spark.generated.GeneratedSpatioTemporalUDFs;
+import org.mobilitydb.spark.sql.MobilitySparkSql;
+import org.mobilitydb.spark.sql.types.TGeomPoint;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * The typed Spark SQL surface registered over the UDF surface in one session, as a query that
+ * reads values in both forms registers them. Mirrors #GeneratedSqlSurfaceTest: a name both
+ * surfaces carry still widens a number to the typed overload before the call falls back to the
+ * UDF registered first.
+ */
+class SqlSurfaceOverUdfSurfaceTest {
+
+    private static SparkSession spark;
+    private static String trip;
+
+    @BeforeAll
+    static void init() {
+        // No-op error handler so a parse error returns rather than terminating the JVM.
+        GeneratedFunctions.meos_initialize_error_handler((level, code, message) -> { });
+        GeneratedFunctions.meos_initialize();
+        trip = "tgeompointFromHexEWKB('" + TGeomPoint.encode(GeneratedFunctions.tgeompoint_in(
+                "[Point(1 1)@2020-01-01 00:00:00+00, Point(2 2)@2020-01-02 00:00:00+00]")) + "')";
+        spark = SparkSession.builder().appName("sql-over-udf-surface").master("local[1]")
+                .config("spark.ui.enabled", "false")
+                .config("spark.sql.session.timeZone", "UTC")
+                .config("spark.sql.datetime.java8API.enabled", "true")
+                .getOrCreate();
+        GeneratedSpatioTemporalUDFs.registerAll(spark);
+        MobilitySparkSql.registerAll(spark);
+    }
+
+    @AfterAll
+    static void finalizeMeos() {
+        if (spark != null) {
+            spark.stop();
+        }
+        GeneratedFunctions.meos_finalize();
+    }
+
+    private static Object scalar(String sql) {
+        return spark.sql(sql).collectAsList().get(0).get(0);
+    }
+
+    @Test
+    void anIntegerDistanceWidensToTheTypedOverload() {
+        // eDwithin(tgeompoint, tgeompoint, double): 10 is an int literal, which the UDF of the
+        // same name registered first takes as it stands and cannot cast to its double
+        assertEquals(true, scalar("SELECT eDwithin(" + trip + ", " + trip + ", 10)"));
+        assertEquals(true, scalar("SELECT eDwithin(" + trip + ", " + trip + ", 10.0)"));
+    }
+}