feat(display name generation): added examples

Author: claudioaltamura

README.md

@@ -9,3 +9,4 @@ JUnit 6 examples
 * @ParameterizedTest
 * @RepeatedTest
 * @TestFactory
+* @DisplayNameGeneration

src/test/java/de/claudioaltamura/java/junit6/DisplayNameIndicativeSentencesGenerationExampleTest.java

@@ -0,0 +1,26 @@
+package de.claudioaltamura.java.junit6;
+
+import org.junit.jupiter.api.DisplayNameGeneration;
+import org.junit.jupiter.api.DisplayNameGenerator;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
+class DisplayNameIndicativeSentencesGenerationExampleTest {
+
+
+    @Test
+    void if_it_is_divisible_by_4_but_not_by_100() {
+        assertTrue(true, "This test should pass for years divisible by 4 but not by 100");
+    }
+
+    @ParameterizedTest(name = "Year {0} is a leap year.")
+    @ValueSource(ints = { 2016, 2020, 2048 })
+    void if_it_is_one_of_the_following_years(int year) {
+        assertTrue(year % 4 == 0 && year % 100 != 0, "This test should pass for leap years");
+    }
+
+}

src/test/java/de/claudioaltamura/java/junit6/DisplayNameReplaceUnderscoresExampleTest.java

@@ -0,0 +1,27 @@
+package de.claudioaltamura.java.junit6;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.DisplayNameGeneration;
+import org.junit.jupiter.api.DisplayNameGenerator;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
+class DisplayNameReplaceUnderscoresExampleTest {
+
+    @Test
+    void if_it_is_zero() {
+        assertTrue(true, "This test should pass for year 0");
+    }
+
+    @DisplayName("A negative value for year is not supported by the leap year computation.")
+    @ParameterizedTest(name = "For example, year {0} is not supported.")
+    @ValueSource(ints = { -1, -4 })
+    void if_it_is_negative(int year) {
+        assertTrue(year < 0, "This test should pass for negative years");
+    }
+
+}