Add unit tests for workflow activity context

Signed-off-by: Artur Ciocanu <ciocanu@adobe.com>

sdk-workflows/src/test/java/io/dapr/workflows/runtime/DefaultWorkflowActivityContextTest.java

@@ -0,0 +1,46 @@
+package io.dapr.workflows.runtime;
+
+import io.dapr.durabletask.TaskActivityContext;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+class DefaultWorkflowActivityContextTest {
+
+  private DefaultWorkflowActivityContext context;
+
+  @BeforeEach
+  void setUp() {
+    TaskActivityContext mockInnerContext = mock(TaskActivityContext.class);
+    context = new DefaultWorkflowActivityContext(mockInnerContext);
+
+    when(mockInnerContext.getName()).thenReturn("TestActivity");
+    when(mockInnerContext.getInput(any())).thenReturn("TestInput");
+    when(mockInnerContext.getTaskExecutionId()).thenReturn("TestExecutionId");
+  }
+
+  @Test
+  void getLogger() {
+    assertNotNull(context.getLogger());
+  }
+
+  @Test
+  void getName() {
+    assertEquals("TestActivity", context.getName());
+  }
+
+  @Test
+  void getInput() {
+    String input = context.getInput(String.class);
+    assertEquals("TestInput", input);
+  }
+
+  @Test
+  void getTaskExecutionId() {
+    assertEquals("TestExecutionId", context.getTaskExecutionId());
+  }
+}