Backport Java 11 CharSequence.compare
Test: tools/test.py --runtimes=all --no-internal -v *Backport*Test*
Test: tools/test.py --no-internal -v *GenerateBackportMethods*
Change-Id: I4e0e46d2fe1fc12ee6843a369094259472afd7f1
diff --git a/src/test/examplesJava11/backport/CharSequenceBackportJava11Main.java b/src/test/examplesJava11/backport/CharSequenceBackportJava11Main.java
new file mode 100644
index 0000000..d0888f8
--- /dev/null
+++ b/src/test/examplesJava11/backport/CharSequenceBackportJava11Main.java
@@ -0,0 +1,46 @@
+package backport;
+
+public final class CharSequenceBackportJava11Main {
+ public static void main(String[] args) {
+ testCompare();
+ }
+
+ private static void testCompare() {
+ assertTrue(CharSequence.compare("Hello", "Hello") == 0);
+
+ assertTrue(CharSequence.compare("Hey", "Hello") > 0);
+ assertTrue(CharSequence.compare("Hello", "Hey") < 0);
+
+ assertTrue(CharSequence.compare("Hel", "Hello") < 0);
+ assertTrue(CharSequence.compare("Hello", "Hel") > 0);
+
+ assertTrue(CharSequence.compare("", "") == 0);
+ assertTrue(CharSequence.compare("", "Hello") < 0);
+ assertTrue(CharSequence.compare("Hello", "") > 0);
+
+ // Different CharSequence types:
+ assertTrue(CharSequence.compare("Hello", new StringBuilder("Hello")) == 0);
+ assertTrue(CharSequence.compare(new StringBuffer("hey"), "Hello") > 0);
+ assertTrue(CharSequence.compare(new StringBuffer("Hello"), new StringBuilder("Hey")) < 0);
+
+ try {
+ throw new AssertionError(CharSequence.compare(null, "Hello"));
+ } catch (NullPointerException expected) {
+ }
+ try {
+ throw new AssertionError(CharSequence.compare("Hello", null));
+ } catch (NullPointerException expected) {
+ }
+ try {
+ // Ensure a == b fast path does not happen before null checks.
+ throw new AssertionError(CharSequence.compare(null, null));
+ } catch (NullPointerException expected) {
+ }
+ }
+
+ private static void assertTrue(boolean value) {
+ if (!value) {
+ throw new AssertionError("Expected <true> but was <false>");
+ }
+ }
+}