test: linked list add and size

assignment/src/test/java/appointmentplanner/customlist/api/CustomLinkedListTest.java

@@ -0,0 +1,39 @@
+package appointmentplanner.customlist.api;
+
+import static org.assertj.core.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+
+import appointmentplanner.customlist.CustomLinkedListImpl;
+
+public class CustomLinkedListTest {
+
+  @Test
+  void cllAddandCllSize_shouldAddElementSuccessfullyAndCalculateSizeSuccessfully() {
+    CustomLinkedList<String> list = new CustomLinkedListImpl<>();
+
+    int counter = 0;
+
+    assertThat(list.size()).isEqualTo(counter);
+
+    for (String word : new String[] { "Ahoj", "jak", "se", "mas", "vole" }) {
+      counter++;
+      list.add(word);
+      assertThat(list.size()).isEqualTo(counter);
+    }
+
+  }
+
+  @ParameterizedTest
+  @CsvSource({
+      "'Ahoj, jak, to, jde', 'to', true",
+      "'Ty, jsi, ale, hloupy', 'to', false"
+
+  })
+  void cllContains_shouldReturnCorrectResult(String[] data, String toContain, boolean shouldContain) {
+
+  }
+
+}