feat: create Enums from String in TestCases

Refs: #127

Author: Nylle

src/main/java/com/github/nylle/javafixture/annotations/testcases/ReflectedTestCase.java

@@ -38,6 +38,9 @@ public ReflectedTestCase(TestCase testCase) {
     @SuppressWarnings("unchecked")
     public <T> T getTestCaseValueFor(Class<T> type, int i) {
         validate(type, i);
+        if(type.isEnum()) {
+            return (T) Enum.valueOf((Class<Enum>) type, (String)matrix.get(asPrimitive(String.class)).get(i));
+        }
         return (T) matrix.get(asPrimitive(type)).get(i);
     }
 
@@ -80,6 +83,9 @@ private static <T> boolean isInvalid(Class<T> type, List<?> nonDefaultValues) {
         if (nonDefaultValues.size() > 1) {
             return true;
         }
+        if(type.isEnum()) {
+            return false;
+        }
         return asPrimitive(type) != asPrimitive(nonDefaultValues.get(0).getClass());
     }
 

src/test/java/com/github/nylle/javafixture/annotations/testcases/ReflectedTestCaseTest.java

@@ -1,5 +1,6 @@
 package com.github.nylle.javafixture.annotations.testcases;
 
+import com.github.nylle.javafixture.testobjects.TestEnum;
 import com.github.nylle.javafixture.testobjects.TestObject;
 import org.junit.jupiter.api.Test;
 
@@ -11,7 +12,7 @@
 class ReflectedTestCaseTest {
 
     @Test
-    void getTestCaseValueFor_ThrowsIfTwoDifferentValuesAreCustomized() {
+    void throwsIfTwoDifferentValuesAreCustomized() {
         var testCaseWithDuplicateCustomizationsAt_1_2_3_4_6 = createCustomTestCase(
                 "foo", true,
                 2.0f, 2L,
@@ -148,6 +149,25 @@ void createsReflectedTestCaseWithDefaultValues() {
         assertThat(actual.getTestCaseValueFor(Byte.class, 5)).isZero();
     }
 
+    @Test
+    void createsEnumFromString() {
+        var testCaseWithStringOnPosition0 = createCustomTestCase("VALUE3", false, 0.0f, 0L, Object.class, 0, (short) 0, Character.MIN_VALUE, (byte) 0, 0.0d);
+
+        var actual = new ReflectedTestCase(testCaseWithStringOnPosition0);
+
+        assertThat(actual.getTestCaseValueFor(TestEnum.class, 0)).isEqualTo(TestEnum.VALUE3);
+    }
+
+    @Test
+    void throwsForInvalidEnumValue() {
+        var testCaseWithStringOnPosition0 = createCustomTestCase("INVALID", false, 0.0f, 0L, Object.class, 0, (short) 0, Character.MIN_VALUE, (byte) 0, 0.0d);
+
+        var actual = new ReflectedTestCase(testCaseWithStringOnPosition0);
+
+        assertThatExceptionOfType(IllegalArgumentException.class).isThrownBy(() -> actual.getTestCaseValueFor(TestEnum.class, 0))
+                .withMessage("No enum constant com.github.nylle.javafixture.testobjects.TestEnum.INVALID");
+    }
+
     private static TestCase createDefaultTestCase() {
         return new TestCase() {
             @Override

src/test/java/com/github/nylle/javafixture/annotations/testcases/TestCaseTest.java

@@ -1,5 +1,6 @@
 package com.github.nylle.javafixture.annotations.testcases;
 
+import com.github.nylle.javafixture.testobjects.TestEnum;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Nested;
 
@@ -38,6 +39,13 @@ void testClassIsAssignable(Class type, Class interfaceType, boolean expected) {
         assertThat(interfaceType.isAssignableFrom(type)).isEqualTo(expected);
     }
 
+    @TestWithCases
+    @TestCase(str1 = "VALUE1", str2 = "VALUE1")
+    @TestCase(str1 = "VALUE2", str2 = "VALUE2")
+    void canCreateEnumFromString(TestEnum testEnum, String string) {
+        assertThat(testEnum).isEqualTo(TestEnum.valueOf(string));
+    }
+
     @Nested
     @DisplayName("verify that primitive wrapper classes are supported as method arguments")
     class PrimitiveAutoboxing {