diff --git a/materials/2024-2025/11b/12-02-unit-tests/.gitignore b/materials/2024-2025/11b/12-02-unit-tests/.gitignore
new file mode 100644
index 0000000..f68d109
--- /dev/null
+++ b/materials/2024-2025/11b/12-02-unit-tests/.gitignore
@@ -0,0 +1,29 @@
+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
\ No newline at end of file
diff --git a/materials/2024-2025/11b/12-02-unit-tests/.idea/.gitignore b/materials/2024-2025/11b/12-02-unit-tests/.idea/.gitignore
new file mode 100644
index 0000000..eaf91e2
--- /dev/null
+++ b/materials/2024-2025/11b/12-02-unit-tests/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/materials/2024-2025/11b/12-02-unit-tests/.idea/misc.xml b/materials/2024-2025/11b/12-02-unit-tests/.idea/misc.xml
new file mode 100644
index 0000000..396b409
--- /dev/null
+++ b/materials/2024-2025/11b/12-02-unit-tests/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_23" default="true" project-jdk-name="temurin-23" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/materials/2024-2025/11b/12-02-unit-tests/.idea/modules.xml b/materials/2024-2025/11b/12-02-unit-tests/.idea/modules.xml
new file mode 100644
index 0000000..01d832e
--- /dev/null
+++ b/materials/2024-2025/11b/12-02-unit-tests/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/12-02-unit-tests.iml" filepath="$PROJECT_DIR$/12-02-unit-tests.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/materials/2024-2025/11b/12-02-unit-tests/.idea/vcs.xml b/materials/2024-2025/11b/12-02-unit-tests/.idea/vcs.xml
new file mode 100644
index 0000000..15b5e29
--- /dev/null
+++ b/materials/2024-2025/11b/12-02-unit-tests/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../../../.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/materials/2024-2025/11b/12-02-unit-tests/12-02-unit-tests.iml b/materials/2024-2025/11b/12-02-unit-tests/12-02-unit-tests.iml
new file mode 100644
index 0000000..4057de1
--- /dev/null
+++ b/materials/2024-2025/11b/12-02-unit-tests/12-02-unit-tests.iml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module-library" scope="TEST">
+      <library name="JUnit5.8.1">
+        <CLASSES>
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter/5.8.1/junit-jupiter-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-api/5.8.1/junit-jupiter-api-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-commons/1.8.1/junit-platform-commons-1.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/apiguardian/apiguardian-api/1.1.2/apiguardian-api-1.1.2.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-params/5.8.1/junit-jupiter-params-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-engine/5.8.1/junit-jupiter-engine-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-engine/1.8.1/junit-platform-engine-1.8.1.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
+    <orderEntry type="module-library">
+      <library>
+        <CLASSES>
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter/5.8.1/junit-jupiter-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-api/5.8.1/junit-jupiter-api-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-commons/1.8.1/junit-platform-commons-1.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/apiguardian/apiguardian-api/1.1.2/apiguardian-api-1.1.2.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-params/5.8.1/junit-jupiter-params-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-engine/5.8.1/junit-jupiter-engine-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-engine/1.8.1/junit-platform-engine-1.8.1.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
+  </component>
+</module>
\ No newline at end of file
diff --git a/materials/2024-2025/11b/12-02-unit-tests/src/ChessGame.java b/materials/2024-2025/11b/12-02-unit-tests/src/ChessGame.java
new file mode 100644
index 0000000..49021da
--- /dev/null
+++ b/materials/2024-2025/11b/12-02-unit-tests/src/ChessGame.java
@@ -0,0 +1,12 @@
+public class ChessGame {
+    public Object[] board = {
+            new Object()
+    };
+
+    public Object getAt(String pos) {
+        if(pos.length() != 2)
+            throw new IllegalArgumentException("Invalid position");
+
+        return board[0];
+    }
+}
diff --git a/materials/2024-2025/11b/12-02-unit-tests/src/ChessGameTest.java b/materials/2024-2025/11b/12-02-unit-tests/src/ChessGameTest.java
new file mode 100644
index 0000000..86cfd12
--- /dev/null
+++ b/materials/2024-2025/11b/12-02-unit-tests/src/ChessGameTest.java
@@ -0,0 +1,47 @@
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class ChessGameTest {
+
+    ChessGame cg;
+
+    @BeforeEach
+    void setUp() {
+        cg = new ChessGame();
+    }
+
+    @AfterEach
+    void tearDown() {
+    }
+
+    @Test
+    void getAtWithValidPosition() {
+        Object res = cg.getAt("A1");
+        assertEquals(cg.board[0], res,
+                "getAt should return the first object in board"
+        );
+
+//        assertEquals(new Figure("white", "K", "A1"), res);
+    }
+
+    @Test
+    void getAtWIthInvalidPosition() {
+//        Object res = cg.getAt("aaaaaa");
+//        assertEquals(cg.board[0], res,
+//                "getAt should throw an Exception"
+//        );
+//        try {
+//            cg.getAt("aaaaaa");
+//        } catch(Exception err) {
+//            assertEquals(...);
+//        }
+        assertThrows(
+                IllegalArgumentException.class,
+                () -> cg.getAt("A2"),
+                "getAt should throw an Exception"
+        );
+    }
+}
\ No newline at end of file
diff --git a/materials/2024-2025/11b/12-02-unit-tests/src/Main.java b/materials/2024-2025/11b/12-02-unit-tests/src/Main.java
new file mode 100644
index 0000000..f1f2792
--- /dev/null
+++ b/materials/2024-2025/11b/12-02-unit-tests/src/Main.java
@@ -0,0 +1,6 @@
+public class Main {
+    public static void main(String[] args) {
+
+        System.out.println("Hello world!");
+    }
+}
\ No newline at end of file