feat: use first successful random factory method

Instead of running all factory methods and then choosing one at random,
we can choose one at random and use it if it is successful.

Refs: JF-77

Author: akutschera

src/main/java/com/github/nylle/javafixture/InstanceFactory.java

@@ -15,6 +15,7 @@
 import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.Deque;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -65,19 +66,16 @@ public <T> T construct(final SpecimenType<T> type, CustomizationContext customiz
     }
 
     public <T> T manufacture(final SpecimenType<T> type, CustomizationContext customizationContext) {
-        var results = type.getFactoryMethods()
+        var factoryMethods = type.getFactoryMethods();
+        Collections.shuffle(factoryMethods);
+        var results = factoryMethods
                 .stream()
                 .filter(x -> Modifier.isPublic(x.getModifiers()))
                 .map(x -> manufactureOrNull(x, type, customizationContext))
                 .filter(x -> x != null)
-                .map(x -> (T) x)
-                .collect(toList());
-
-        if (results.isEmpty()) {
-            throw new SpecimenException(format("Cannot manufacture %s", type.asClass()));
-        }
+                .findFirst();
 
-        return results.get(random.nextInt(results.size()));
+        return results.orElseThrow(() -> new SpecimenException(format("Cannot manufacture %s", type.asClass())));
     }
 
     public <T> T instantiate(final SpecimenType<T> type) {

src/test/java/com/github/nylle/javafixture/CharsetTest.java

@@ -0,0 +1,22 @@
+package com.github.nylle.javafixture;
+
+import org.junit.jupiter.api.Test;
+
+import java.nio.charset.Charset;
+
+import static com.github.nylle.javafixture.Fixture.fixture;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class CharsetTest {
+
+    @Test
+    void charsetTest() {
+        var charset = fixture().create(java.nio.charset.Charset.class);
+        assertThat( charset ).isNotNull();
+    }
+
+
+    public static class WithCharSet {
+        private Charset charset;
+    }
+}