Made DigitList public for testing

* Added new rule to make classes visible for testing.
* Updated tools/srcgen/generate_android_icu4j.sh to delete
  previous work around for DigitListTest.
* Added DigitListTest to android_icu4j

Bug: 33448125
Test: tools/srcgen/generate_android_icu4j.sh
Change-Id: I5126a51b895e877cdac5adad66cfce60115016e4

2 files changed, 47 insertions, 1 deletions

diff --git a/android_icu4j/src/main/java/android/icu/text/DigitList.java b/android_icu4j/src/main/java/android/icu/text/DigitList.java
index 83f1bddd0..78f9eeb7f 100644
--- a/android_icu4j/src/main/java/android/icu/text/DigitList.java
+++ b/android_icu4j/src/main/java/android/icu/text/DigitList.java
@@ -43,8 +43,9 @@ import java.math.BigInteger;
  * @see java.text.MessageFormat
  * @version      1.18 08/12/98
  * @author       Mark Davis, Alan Liu
+ * @hide Made public for testing
  * */
-final class DigitList {
+public final class DigitList {
     /**
      * The maximum number of significant digits in an IEEE 754 double, that
      * is, in a Java double.  This must not be increased, or garbage digits
diff --git a/android_icu4j/src/main/tests/android/icu/text/DigitListTest.java b/android_icu4j/src/main/tests/android/icu/text/DigitListTest.java
new file mode 100644
index 000000000..631deb9a8
--- /dev/null
+++ b/android_icu4j/src/main/tests/android/icu/text/DigitListTest.java
@@ -0,0 +1,45 @@
+/* GENERATED SOURCE. DO NOT MODIFY. */
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html#License
+
+package android.icu.text;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import android.icu.dev.test.TestFmwk;
+
+
+public class DigitListTest extends TestFmwk {
+
+    private static DigitList digitList = new DigitList();
+    private static long testdata = 1414213562;
+
+    @Before
+    public void init() {
+        digitList.set(testdata);
+    }
+
+    @Test
+    public void TestToString() {
+        String digitListStr = digitList.toString();
+        assertEquals("DigitList incorrect", "0.1414213562x10^10", digitListStr);
+    }
+    @Test
+    public void TestHashCode() {
+        int dlHashcode = digitList.hashCode();
+        assertEquals("DigitList hash code incorrect", -616183837, dlHashcode);
+    }
+
+    @Test
+    public void TestEquals() {
+        DigitList digitList2 = new DigitList();
+
+	// Test for success
+        digitList2.set(testdata);
+        assertTrue("DigitList objects with same values found unequal", digitList.equals(digitList2));
+	// Test for failure
+	digitList2.set(testdata+1);
+	assertFalse("DigitList objects with different values found equal", digitList.equals(digitList2));
+    }
+}