coverage improvement

lib/src/test/java/dev/openfeature/javasdk/internal/ObjectUtilsTest.java

@@ -0,0 +1,87 @@
+package dev.openfeature.javasdk.internal;
+
+import java.util.*;
+
+import org.junit.jupiter.api.*;
+
+import static dev.openfeature.javasdk.internal.ObjectUtils.defaultIfNull;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class ObjectUtilsTest {
+
+    @Nested
+    class GenericObject {
+        @Test
+        @DisplayName("should return default value if null")
+        void shouldReturnDefaultValueIfNull() {
+            var defaultValue = "default";
+
+            var actual = defaultIfNull(null, () -> defaultValue);
+
+            assertThat(actual).isEqualTo(defaultValue);
+        }
+
+        @Test
+        @DisplayName("should return given value if not null")
+        void shouldReturnGivenValueIfNotNull() {
+            var defaultValue = "default";
+            var expectedValue = "expected";
+
+            var actual = defaultIfNull(expectedValue, () -> defaultValue);
+
+            assertThat(actual).isEqualTo(expectedValue);
+        }
+    }
+
+    @Nested
+    class ListSupport {
+
+        @Test
+        @DisplayName("should return default list if given one is null")
+        void shouldReturnDefaultListIfGivenOneIsNull() {
+            var defaultValue = List.of("default");
+
+            var actual = defaultIfNull(null, () -> defaultValue);
+
+            assertThat(actual).isEqualTo(defaultValue);
+        }
+
+        @Test
+        @DisplayName("should return given list if not null")
+        void shouldReturnGivenListIfNotNull() {
+            var defaultValue = List.of("default");
+            var expectedValue = List.of("expected");
+
+            var actual = defaultIfNull(expectedValue, () -> defaultValue);
+
+            assertThat(actual).isEqualTo(expectedValue);
+        }
+    }
+
+    @Nested
+    class MapSupport {
+
+        @Test
+        @DisplayName("should return default map if given one is null")
+        void shouldReturnDefaultMapIfGivenOneIsNull() {
+            var defaultValue = Map.of("key", "default");
+
+            var actual = defaultIfNull(null, () -> defaultValue);
+
+            assertThat(actual).isEqualTo(defaultValue);
+        }
+
+        @Test
+        @DisplayName("should return given map if not null")
+        void shouldReturnGivenMapIfNotNull() {
+            var defaultValue = Map.of("key", "default");
+            var expectedValue = Map.of("key", "expected");
+
+            var actual = defaultIfNull(expectedValue, () -> defaultValue);
+
+            assertThat(actual).isEqualTo(expectedValue);
+        }
+    }
+
+
+}