#385 - added null check on SqlTimeConverter

core/src/main/java/org/sql2o/converters/SqlTimeConverter.java

@@ -3,6 +3,11 @@
 public class SqlTimeConverter extends ConverterBase<java.sql.Time>{
     @Override
     public java.sql.Time convert(Object val) throws ConverterException {
+
+        if (val == null) {
+            return null;
+        }
+
         if (val instanceof java.sql.Time) {
             return (java.sql.Time) val;
         }

core/src/test/java/org/sql2o/converters/SqlTimeConverterTest.java

@@ -0,0 +1,44 @@
+package org.sql2o.converters;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import java.time.OffsetTime;
+import java.time.ZoneOffset;
+import java.util.Date;
+import java.util.stream.Stream;
+
+class SqlTimeConverterTest {
+
+    @ParameterizedTest
+    @MethodSource("supportedValues")
+    void convert_supportedValues_returnsSqlTime(Object value, java.sql.Time expected) throws ConverterException {
+        final var converter = new SqlTimeConverter();
+
+        assertEquals(expected, converter.convert(value));
+    }
+
+    private static Stream<Arguments> supportedValues() {
+        final var expected = java.sql.Time.valueOf("01:02:03");
+        return Stream.of(
+            Arguments.of(null, null),
+            Arguments.of(expected, expected),
+            Arguments.of(new Date(expected.getTime()), expected),
+            Arguments.of(OffsetTime.of(1, 2, 3, 0, ZoneOffset.UTC), expected),
+            Arguments.of(expected.getTime(), expected),
+            Arguments.of("01:02:03", expected)
+        );
+    }
+
+    @Test
+    void convert_unsupportedValue_throwsConverterException() {
+        final var converter = new SqlTimeConverter();
+
+        assertThrows(ConverterException.class, () -> converter.convert(new Object()));
+    }
+}