Added unit tests

Signed-off-by: Asif Sohail Mohammed <[email protected]>

data-prepper-core/src/test/java/org/opensearch/dataprepper/plugin/ObjectMapperConfigurationTest.java

@@ -0,0 +1,81 @@
+package org.opensearch.dataprepper.plugin;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.time.Duration;
+import java.util.Arrays;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.equalTo;
+
+@ExtendWith(MockitoExtension.class)
+class ObjectMapperConfigurationTest {
+    private final ObjectMapperConfiguration objectMapperConfiguration = new ObjectMapperConfiguration();
+
+    @Mock
+    private VariableExpander variableExpander;
+
+    @Test
+    void test_duration_with_pluginConfigObjectMapper() {
+        final String durationTestString = "10s";
+        final ObjectMapper objectMapper = objectMapperConfiguration.pluginConfigObjectMapper(variableExpander);
+        final Duration duration = objectMapper.convertValue(durationTestString, Duration.class);
+        assertThat(duration, equalTo(Duration.ofSeconds(10)));
+    }
+
+    @Test
+    void test_enum_with_pluginConfigObjectMapper() {
+        final String testString = "test";
+        final ObjectMapper objectMapper = objectMapperConfiguration.pluginConfigObjectMapper(variableExpander);
+        final TestType duration = objectMapper.convertValue(testString, TestType.class);
+        assertThat(duration, equalTo(TestType.fromOptionValue(testString)));
+    }
+
+    @Test
+    void test_duration_with_extensionPluginConfigObjectMapper() {
+        final String durationTestString = "10s";
+        final ObjectMapper objectMapper = objectMapperConfiguration.extensionPluginConfigObjectMapper();
+        final Duration duration = objectMapper.convertValue(durationTestString, Duration.class);
+        assertThat(duration, equalTo(Duration.ofSeconds(10)));
+    }
+
+    @Test
+    void test_enum_with_extensionPluginConfigObjectMapper() {
+        final String testString = "test";
+        final ObjectMapper objectMapper = objectMapperConfiguration.extensionPluginConfigObjectMapper();
+        final TestType duration = objectMapper.convertValue(testString, TestType.class);
+        assertThat(duration, equalTo(TestType.fromOptionValue(testString)));
+    }
+
+    private enum TestType {
+
+        TEST("test");
+
+        private static final Map<String, TestType> NAMES_MAP = Arrays.stream(TestType.values())
+                .collect(Collectors.toMap(TestType::toString, Function.identity()));
+
+        private final String name;
+
+        TestType(final String name) {
+            this.name = name;
+        }
+
+        public String toString() {
+            return this.name;
+        }
+
+        @JsonCreator
+        static TestType fromOptionValue(final String option) {
+            return NAMES_MAP.get(option);
+        }
+    }
+
+}