Use gradle for running some java 17 tests

Introduces the build steps and changes 3 backport tests to use this directly.

Still use the old setup for the remaining examples 17 tests

Change-Id: I6d940df13e6f5e588fbbb69193191579238ed3b7
diff --git a/src/test/examplesJava17/backport/ObjectsBackportJava17Test.java b/src/test/examplesJava17/backport/ObjectsBackportJava17Test.java
new file mode 100644
index 0000000..32ba077
--- /dev/null
+++ b/src/test/examplesJava17/backport/ObjectsBackportJava17Test.java
@@ -0,0 +1,148 @@
+// Copyright (c) 2024, the R8 project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+package backport;
+
+import com.android.tools.r8.TestBase;
+import com.android.tools.r8.TestParameters;
+import com.android.tools.r8.TestRuntime.CfVm;
+import java.util.Objects;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameter;
+import org.junit.runners.Parameterized.Parameters;
+
+@RunWith(Parameterized.class)
+public class ObjectsBackportJava17Test extends TestBase {
+
+  @Parameter(0)
+  public TestParameters parameters;
+
+  @Parameters(name = "{0}")
+  public static Iterable<?> data() {
+    return getTestParameters()
+        .withDexRuntimes()
+        .withCfRuntimesStartingFromIncluding(CfVm.JDK17)
+        .withAllApiLevelsAlsoForCf()
+        .build();
+  }
+
+  @Test
+  public void test() throws Exception {
+    testForDesugaring(parameters)
+        .addInnerClassesAndStrippedOuter(getClass())
+        .run(parameters.getRuntime(), TestClass.class)
+        .assertSuccess();
+  }
+
+  public static class TestClass {
+
+    public static void main(String[] args) {
+      // The methods are actually from Java 16, but we can test them from Java 17.
+      testCheckIndex();
+      testCheckFromToIndex();
+      testCheckFromIndexSize();
+    }
+
+    private static void testCheckIndex() {
+      for (long i = 0L; i < 10L; i++) {
+        assertEquals(i, Objects.checkIndex(i, 10L));
+      }
+
+      try {
+        throw new AssertionError(Objects.checkIndex(-1L, 10L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+      try {
+        throw new AssertionError(Objects.checkIndex(10L, 0L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+      try {
+        throw new AssertionError(Objects.checkIndex(0L, 0L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+    }
+
+    private static void testCheckFromToIndex() {
+      for (long i = 0L; i <= 10L; i++) {
+        for (long j = i; j <= 10L; j++) {
+          assertEquals(i, Objects.checkFromToIndex(i, j, 10L));
+        }
+      }
+      assertEquals(0L, Objects.checkFromToIndex(0L, 0L, 0L));
+
+      try {
+        throw new AssertionError(Objects.checkFromToIndex(4L, 2L, 10L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+      try {
+        throw new AssertionError(Objects.checkFromToIndex(-1L, 5L, 10L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+      try {
+        throw new AssertionError(Objects.checkFromToIndex(0L, -1L, 10L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+      try {
+        throw new AssertionError(Objects.checkFromToIndex(11L, 11L, 10L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+      try {
+        throw new AssertionError(Objects.checkFromToIndex(0L, 1L, 0L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+      try {
+        throw new AssertionError(Objects.checkFromToIndex(1L, 1L, 0L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+    }
+
+    private static void testCheckFromIndexSize() {
+      for (long i = 0L; i <= 10L; i++) {
+        for (long j = 10L - i; j >= 0L; j--) {
+          assertEquals(i, Objects.checkFromIndexSize(i, j, 10L));
+        }
+      }
+      assertEquals(0, Objects.checkFromIndexSize(0L, 0L, 0L));
+
+      try {
+        throw new AssertionError(Objects.checkFromIndexSize(8L, 4L, 10L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+      try {
+        throw new AssertionError(Objects.checkFromIndexSize(-1L, 5L, 10L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+      try {
+        throw new AssertionError(Objects.checkFromIndexSize(11L, 0L, 10L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+      try {
+        throw new AssertionError(Objects.checkFromIndexSize(0L, 1L, 0L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+      try {
+        throw new AssertionError(Objects.checkFromIndexSize(1L, 1L, 0L));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+
+      // Check for cases where overflow might occur producing incorrect results.
+      try {
+        throw new AssertionError(Objects.checkFromIndexSize(Long.MAX_VALUE, 1L, Long.MAX_VALUE));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+      try {
+        throw new AssertionError(Objects.checkFromIndexSize(0L, 1L, Long.MIN_VALUE));
+      } catch (IndexOutOfBoundsException expected) {
+      }
+    }
+
+    private static void assertEquals(long expected, long actual) {
+      if (expected != actual) {
+        throw new AssertionError("Expected <" + expected + "> but was <" + actual + '>');
+      }
+    }
+  }
+}