[javadoc] Add a test for JavaDocExternalFilter reference conversion

GitOrigin-RevId: 61bc364b81230a8bc9307ec1e7112b3797eea423

java/java-impl/src/com/intellij/codeInsight/javadoc/JavaDocExternalFilter.java

@@ -18,6 +18,7 @@ import com.intellij.util.Urls;
 import org.jetbrains.annotations.Nls;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.jetbrains.annotations.TestOnly;
 import org.jetbrains.builtInWebServer.BuiltInServerOptions;
 import org.jetbrains.builtInWebServer.WebServerPathToFileManager;
 
@@ -152,4 +153,9 @@ public class JavaDocExternalFilter extends AbstractExternalFilter {
   protected @NotNull ParseSettings getParseSettings(@NotNull String url) {
     return url.endsWith(JavaDocumentationProvider.PACKAGE_SUMMARY_FILE) ? ourPackageInfoSettings : super.getParseSettings(url);
   }
+
+  @TestOnly
+  public void setElement(PsiElement element) {
+    myElement = element;
+  }
 }

java/java-tests/testSrc/com/intellij/java/codeInsight/javadoc/JavaExternalFilterTest.kt

@@ -0,0 +1,44 @@
+// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package com.intellij.java.codeInsight.javadoc
+
+import com.intellij.codeInsight.javadoc.JavaDocExternalFilter
+import com.intellij.testFramework.LightJavaCodeInsightTestCase
+import kotlinx.coroutines.DelicateCoroutinesApi
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.future.future
+
+class JavaExternalFilterTest: LightJavaCodeInsightTestCase() {
+
+  @OptIn(DelicateCoroutinesApi::class)
+  fun testConvertReference() {
+    val project = getProject()
+    val psiFile = createFile("Test.java", "")
+
+    val filter = GlobalScope.future {
+      val filter = JavaDocExternalFilter(project)
+      filter.setElement(psiFile)
+      return@future filter
+    }.join()
+
+    assertEquals(
+      filter.correctRefs("https://jetbrains.com", """<a href="#foo">""").trim(),
+      """<a href="psi_element://Test.java###foo">"""
+    )
+    assertEquals(
+      filter.correctRefs("https://jetbrains.com", """<a href="/foo">""").trim(),
+      """<a href="https://jetbrains.com/foo">"""
+    )
+    assertEquals(
+      filter.correctRefs("https://jetbrains.com", """<a href="/foo#bar">""").trim(),
+      """<a href="https://jetbrains.com/foo#bar">"""
+    )
+    assertEquals(
+      filter.correctRefs("https://www.jetbrains.com", """<a href="//foo/bar">""").trim(),
+      """<a href="https://foo/bar">"""
+    )
+    assertEquals(
+      filter.correctRefs("https://jetbrains.com", """<a href="//foo/bar#baz">""").trim(),
+      """<a href="https://foo/bar#baz">"""
+    )
+  }
+}