From dd0cc7089a4f57a682729d010d6a9545af8fd033 Mon Sep 17 00:00:00 2001
From: Vladimir Sukharev <vladimir.sukharev@jetbrains.com>
Date: Thu, 7 Dec 2023 21:57:42 +0100
Subject: [PATCH] Add unittests for FqNameUnsafe.startsWith(FqNameUnsafe)

---
 .../kotlin/name/FqNameUnsafeTest.java         | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/compiler/tests/org/jetbrains/kotlin/name/FqNameUnsafeTest.java b/compiler/tests/org/jetbrains/kotlin/name/FqNameUnsafeTest.java
index 37c2f43f640..88587d77675 100644
--- a/compiler/tests/org/jetbrains/kotlin/name/FqNameUnsafeTest.java
+++ b/compiler/tests/org/jetbrains/kotlin/name/FqNameUnsafeTest.java
@@ -46,4 +46,52 @@ public class FqNameUnsafeTest {
         Assert.assertTrue(new FqNameUnsafe("<abc>.").startsWith(Name.special("<abc>")));
         Assert.assertTrue(new FqNameUnsafe("<>.abc").startsWith(Name.special("<>")));
     }
+
+    @Test
+    public void startsWithFqNameUnsafe() {
+        Assert.assertTrue(new FqNameUnsafe("abc.def").startsWith(new FqNameUnsafe("abc.def")));
+        Assert.assertTrue(new FqNameUnsafe("abc.def").startsWith(new FqNameUnsafe("abc")));
+        Assert.assertTrue(new FqNameUnsafe("abc").startsWith(new FqNameUnsafe("abc")));
+        Assert.assertTrue(new FqNameUnsafe("abc.").startsWith(new FqNameUnsafe("abc.")));
+        Assert.assertTrue(new FqNameUnsafe("abc.").startsWith(new FqNameUnsafe("abc")));
+        Assert.assertTrue(new FqNameUnsafe("abc.def.").startsWith(new FqNameUnsafe("abc")));
+        Assert.assertTrue(new FqNameUnsafe("abc.def.").startsWith(new FqNameUnsafe("abc.def")));
+        Assert.assertTrue(new FqNameUnsafe("abc.def.").startsWith(new FqNameUnsafe("abc.def.")));
+        Assert.assertTrue(new FqNameUnsafe(".abc").startsWith(new FqNameUnsafe("")));
+
+        Assert.assertFalse(new FqNameUnsafe("").startsWith(new FqNameUnsafe("")));
+        Assert.assertFalse(new FqNameUnsafe("").startsWith(new FqNameUnsafe("id")));
+
+        Assert.assertFalse(new FqNameUnsafe("segment").startsWith(new FqNameUnsafe("")));
+        Assert.assertFalse(new FqNameUnsafe(".abc").startsWith(new FqNameUnsafe("abc")));
+        Assert.assertFalse(new FqNameUnsafe(".abc").startsWith(new FqNameUnsafe("xyz")));
+        Assert.assertFalse(new FqNameUnsafe("abcdef").startsWith(new FqNameUnsafe("abc")));
+        Assert.assertFalse(new FqNameUnsafe("abc").startsWith(new FqNameUnsafe("abcdef")));
+        Assert.assertFalse(new FqNameUnsafe("abc").startsWith(new FqNameUnsafe("abc.")));
+        Assert.assertFalse(new FqNameUnsafe("abc.def").startsWith(new FqNameUnsafe("abc.")));
+        Assert.assertFalse(new FqNameUnsafe("abc.def").startsWith(new FqNameUnsafe("abcdef")));
+        Assert.assertFalse(new FqNameUnsafe("abc.def").startsWith(new FqNameUnsafe("abcxyz")));
+        Assert.assertFalse(new FqNameUnsafe("abc.def").startsWith(new FqNameUnsafe("abc.xyz")));
+
+        // special names
+        Assert.assertFalse(new FqNameUnsafe("abc.def").startsWith(new FqNameUnsafe("<abc>")));
+        Assert.assertFalse(new FqNameUnsafe("abc").startsWith(new FqNameUnsafe("<abc>")));
+        Assert.assertFalse(new FqNameUnsafe("abc.").startsWith(new FqNameUnsafe("<abc>")));
+        Assert.assertFalse(new FqNameUnsafe(".abc").startsWith(new FqNameUnsafe("<>")));
+
+        Assert.assertFalse(new FqNameUnsafe("").startsWith(new FqNameUnsafe("<>")));
+        Assert.assertFalse(new FqNameUnsafe("").startsWith(new FqNameUnsafe("<id>")));
+
+        Assert.assertFalse(new FqNameUnsafe("segment").startsWith(new FqNameUnsafe("<>")));
+        Assert.assertFalse(new FqNameUnsafe(".abc").startsWith(new FqNameUnsafe("<abc>")));
+        Assert.assertFalse(new FqNameUnsafe("abcdef").startsWith(new FqNameUnsafe("<abc>")));
+        Assert.assertFalse(new FqNameUnsafe("abc").startsWith(new FqNameUnsafe("<abcdef>")));
+        Assert.assertFalse(new FqNameUnsafe("abc.xyz").startsWith(new FqNameUnsafe("<abcdef>")));
+
+        Assert.assertFalse(new FqNameUnsafe("<abc>.def").startsWith(new FqNameUnsafe("<abc>.")));
+        Assert.assertTrue(new FqNameUnsafe("<abc>").startsWith(new FqNameUnsafe("<abc>")));
+        Assert.assertTrue(new FqNameUnsafe("<abc>.").startsWith(new FqNameUnsafe("<abc>")));
+        Assert.assertTrue(new FqNameUnsafe("<abc.>").startsWith(new FqNameUnsafe("<abc.>")));
+        Assert.assertTrue(new FqNameUnsafe("<>.abc").startsWith(new FqNameUnsafe("<>")));
+    }
 }