Add tests for String#intern() where the interning does not happen

chitoku-k · chitoku-k · commit 391a589d920d · 2019-05-09T12:30:17.000+09:00
diff --git a/tests/Packages/JavaLangStringTest.php b/tests/Packages/JavaLangStringTest.php
@@ -121,6 +121,45 @@ public function testIntern()
         $this->assertSame($intern, $literal);
     }
 
+    public function testNotInterned()
+    {
+        ob_start();
+        $this->initiatedJavaClasses['JavaLangStringTest']
+            ->getInvoker()
+            ->getStatic()
+            ->getMethods()
+            ->call(
+                'notInterned'
+            );
+        [ $intern, $literal ] = array_filter(explode("\n", ob_get_clean()));
+
+        $this->assertIsNumeric($intern);
+        $this->assertIsNumeric($literal);
+
+        $this->assertNotSame($intern, $literal);
+    }
+
+    public function testNotInternedAfterLiteral()
+    {
+        ob_start();
+        $this->initiatedJavaClasses['JavaLangStringTest']
+            ->getInvoker()
+            ->getStatic()
+            ->getMethods()
+            ->call(
+                'notInternedAfterLiteral'
+            );
+        [ $intern, $literal1, $literal2 ] = array_filter(explode("\n", ob_get_clean()));
+
+        $this->assertIsNumeric($intern);
+        $this->assertIsNumeric($literal1);
+        $this->assertIsNumeric($literal2);
+
+        $this->assertNotSame($intern, $literal1);
+        $this->assertNotSame($intern, $literal2);
+        $this->assertSame($literal1, $literal2);
+    }
+
     public function testReplace()
     {
         ob_start();
diff --git a/tests/fixtures/java/JavaLangStringTest.java b/tests/fixtures/java/JavaLangStringTest.java
@@ -29,6 +29,30 @@ public static void intern()
         System.out.println(System.identityHashCode("test"));
     }
 
+    public static void notInterned()
+    {
+        String te = "te";
+        String st = "st";
+
+        String test = te + st;
+        System.out.println(System.identityHashCode(test));
+
+        System.out.println(System.identityHashCode("test"));
+    }
+
+    public static void notInternedAfterLiteral()
+    {
+        String te = "te";
+        String st = "st";
+
+        String test = te + st;
+        System.out.println(System.identityHashCode(test));
+        System.out.println(System.identityHashCode("test"));
+
+        test.intern();
+        System.out.println(System.identityHashCode("test"));
+    }
+
     public static void replace(String a, String b, String c)
     {
         System.out.print(a.replace(b, c));
