diff --git a/assertj-core/src/test/java/org/assertj/core/api/AssertIntegrationTest.java b/assertj-core/src/test/java/org/assertj/core/api/AssertIntegrationTest.java
new file mode 100644
index 00000000000..61958b2d5c6
--- /dev/null
+++ b/assertj-core/src/test/java/org/assertj/core/api/AssertIntegrationTest.java
@@ -0,0 +1,45 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ * Copyright 2012-2025 the original author or authors.
+ */
+package org.assertj.core.api;
+
+import org.junit.jupiter.api.Test;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class AssertIntegrationTest {
+
+    // Simple immutable user object
+    record User(String name, int age) {}
+
+    @Test
+    void should_assert_on_user_object_properties() {
+        User user = new User("Alice", 30);
+
+        assertThat(user)
+            .extracting(User::name, User::age)   // Pull out fields
+            .containsExactly("Alice", 30);       // Check values in order
+    }
+
+    @Test
+    void should_assert_on_a_list_of_users() {
+        List<User> users = List.of(
+            new User("Alice", 30),
+            new User("Bob", 25)
+        );
+
+        assertThat(users)
+            .extracting(User::name)              // Pull out names from the list
+            .containsExactly("Alice", "Bob");    // Check list contents match
+    }
+}
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diff --git a/assertj-core/src/test/java/org/assertj/core/api/StringAssertTest.java b/assertj-core/src/test/java/org/assertj/core/api/StringAssertTest.java
new file mode 100644
index 00000000000..25ce9d13e22
--- /dev/null
+++ b/assertj-core/src/test/java/org/assertj/core/api/StringAssertTest.java
@@ -0,0 +1,45 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ * Copyright 2012-2025 the original author or authors.
+ */
+package org.assertj.core.api;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class StringAssertTest {
+
+  @Test
+  void should_pass_when_strings_are_equal_ignoring_case() {
+    assertThat("Hello").isEqualToIgnoringCase("hello");
+    assertThat("AssertJ").isEqualToIgnoringCase("assertj");
+  }
+
+  @Test
+  void should_fail_when_strings_are_not_equal_ignoring_case() {
+    assertThat("Hello").isNotEqualToIgnoringCase("World");
+    assertThat("AssertJ").isNotEqualToIgnoringCase("JUnit");
+  }
+
+  @Test
+  void should_pass_when_string_is_null_or_empty() {
+    String empty = "";
+    String nullString = null;
+    assertThat(empty).isNullOrEmpty();
+    assertThat(nullString).isNullOrEmpty();
+  }
+
+  @Test
+  void should_fail_when_string_is_not_null_or_empty() {
+    assertThat("AssertJ").isNotNull().isNotEmpty();
+  }
+}
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