From 0963bd25a860e97a4b387c2871a5d495257bf4e5 Mon Sep 17 00:00:00 2001
From: Nikolay Krasko <nikolay.krasko@jetbrains.com>
Date: Tue, 14 Feb 2023 12:53:43 +0100
Subject: [PATCH] Test links reference existing files

---
 license/README.md                             |  2 +-
 .../jetbrains/kotlin/code/LicensesTests.kt    | 24 +++++++++++++++----
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/license/README.md b/license/README.md
index 5158863fa87..57715b9c906 100644
--- a/license/README.md
+++ b/license/README.md
@@ -94,7 +94,7 @@ the Kotlin IntelliJ IDEA plugin:
       - Origin: Derived from boost special math functions, Copyright Eric Ford & Hubert Holin 2001.
 
  - Path: libraries/stdlib/wasm/internal/kotlin/wasm/internal/Number2String.kt
-      - License: Apache 2 ([third_party/assemblyscript_license.txt][assemblyscript])
+      - License: Apache 2 ([license/third_party/assemblyscript_license.txt][assemblyscript])
       - Origin: Derived from assemblyscript standard library
 
  - Path: plugins/lint/android-annotations
diff --git a/repo/codebase-tests/tests/org/jetbrains/kotlin/code/LicensesTests.kt b/repo/codebase-tests/tests/org/jetbrains/kotlin/code/LicensesTests.kt
index d75f86da803..dd88631ce86 100644
--- a/repo/codebase-tests/tests/org/jetbrains/kotlin/code/LicensesTests.kt
+++ b/repo/codebase-tests/tests/org/jetbrains/kotlin/code/LicensesTests.kt
@@ -5,23 +5,25 @@
 
 package org.jetbrains.kotlin.code
 
-import junit.framework.TestCase
 import org.jetbrains.kotlin.test.testFramework.KtUsefulTestCase
+import org.jetbrains.kotlin.test.testFramework.KtUsefulTestCase.assertEmpty
 import org.junit.Test
 import java.io.File
 
 class LicensesTests {
+    companion object {
+        private const val licenseReadmePath = "license/README.md"
+    }
+
     @Test
     fun testLinksDefinitions() {
-        val licenseDir = File("license")
-
         val linkDefinitionRegExp = Regex(pattern = "\\[(\\w+)]:.+")
         val linkRegExp = Regex(pattern = "]\\s?\\[(\\w+)]")
 
         val linksUsages = mutableSetOf<String>()
         val linksDefinitions = mutableSetOf<String>()
 
-        val readmeFile = File(licenseDir, "README.md")
+        val readmeFile = File(licenseReadmePath)
         readmeFile.useLines { lineSequence ->
             lineSequence.forEach { line ->
                 val definitionMatch = linkDefinitionRegExp.matchEntire(line)
@@ -39,4 +41,18 @@ class LicensesTests {
             linksDefinitions.sorted()
         )
     }
+
+    @Test
+    fun testLicensesAreExistingFiles() {
+        val licenseReferenceRegexp = Regex("\\[([^]]*third_party/[^]]*\\.txt)]")
+        val readmeFile = File(licenseReadmePath)
+        val linkedInReadme = readmeFile.useLines { lineSequence ->
+            lineSequence.flatMap { line ->
+                licenseReferenceRegexp.findAll(line).map { it.groups[1]?.value ?: error("Should be present because of match") }
+            }.toSet()
+        }
+
+        val missingFiles = linkedInReadme.filterNot { path -> File(path).exists() }
+        assertEmpty("Files for licenses are missing", missingFiles)
+    }
 }
\ No newline at end of file