✅ Add a tests for utility class constructors

Signed-off-by: Marcus Fihlon <[email protected]>

src/main/java/swiss/fihlon/apus/util/DownloadUtil.java

@@ -34,7 +34,7 @@ public static String getString(@NotNull final String location) throws IOExceptio
     }
 
     private DownloadUtil() {
-        throw new IllegalStateException("Utility class");
+        throw new IllegalStateException("Utility classes can't be instantiated!");
     }
 
 }

src/main/java/swiss/fihlon/apus/util/HtmlUtil.java

@@ -40,7 +40,7 @@ public static String extractText(@NotNull final String html) {
     }
 
     private HtmlUtil() {
-        throw new IllegalStateException("Utility class");
+        throw new IllegalStateException("Utility classes can't be instantiated!");
     }
 
 }

src/main/java/swiss/fihlon/apus/util/PasswordUtil.java

@@ -33,7 +33,7 @@ public static boolean matches(@NotNull final String password, @NotNull final Str
     }
 
     private PasswordUtil() {
-        throw new IllegalStateException("Utility class");
+        throw new IllegalStateException("Utility classes can't be instantiated!");
     }
 
 }

src/test/java/swiss/fihlon/apus/util/DownloadUtilTest.java

@@ -19,6 +19,11 @@
 
 import org.junit.jupiter.api.Test;
 
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 class DownloadUtilTest {
@@ -30,4 +35,13 @@ void getString() throws Exception {
         assertTrue(string.endsWith("}"));
     }
 
+    @Test
+    void expectExceptionCallingConstructor() throws Exception {
+        final Constructor<DownloadUtil> constructor = DownloadUtil.class.getDeclaredConstructor();
+        constructor.setAccessible(true);
+        final var exception = assertThrows(InvocationTargetException.class, constructor::newInstance).getTargetException();
+        assertEquals(IllegalStateException.class, exception.getClass());
+        assertEquals("Utility classes can't be instantiated!", exception.getMessage());
+    }
+
 }

src/test/java/swiss/fihlon/apus/util/HtmlUtilTest.java

@@ -19,7 +19,11 @@
 
 import org.junit.jupiter.api.Test;
 
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 class HtmlUtilTest {
 
@@ -55,4 +59,13 @@ void extractText() {
                 HtmlUtil.extractText("Test </p>>>>Test<<<<p> Test"));
     }
 
+    @Test
+    void expectExceptionCallingConstructor() throws Exception {
+        final Constructor<HtmlUtil> constructor = HtmlUtil.class.getDeclaredConstructor();
+        constructor.setAccessible(true);
+        final var exception = assertThrows(InvocationTargetException.class, constructor::newInstance).getTargetException();
+        assertEquals(IllegalStateException.class, exception.getClass());
+        assertEquals("Utility classes can't be instantiated!", exception.getMessage());
+    }
+
 }

src/test/java/swiss/fihlon/apus/util/PasswordUtilTest.java

@@ -19,7 +19,12 @@
 
 import org.junit.jupiter.api.Test;
 
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 class PasswordUtilTest {
@@ -65,4 +70,13 @@ void positiveTests() {
         assertTrue(PasswordUtil.matches(rawPassword, hashedPassword5));
     }
 
+    @Test
+    void expectExceptionCallingConstructor() throws Exception {
+        final Constructor<PasswordUtil> constructor = PasswordUtil.class.getDeclaredConstructor();
+        constructor.setAccessible(true);
+        final var exception = assertThrows(InvocationTargetException.class, constructor::newInstance).getTargetException();
+        assertEquals(IllegalStateException.class, exception.getClass());
+        assertEquals("Utility classes can't be instantiated!", exception.getMessage());
+    }
+
 }