add openjdk's collection test suite

The relevant tests were extracted with minimal modifications to allow
them to be run in Java 11, by a non-main test harness, to only run
the Caffeine implementations, and fix issues with stateful statics that
are modified.

.circleci/config.yml

@@ -161,6 +161,7 @@ workflows:
                 - caffeine:strongKeysAndSoftValuesSyncCaffeineTest
                 - caffeine:weakKeysAndWeakValuesSyncCaffeineTest
                 - caffeine:weakKeysAndSoftValuesSyncCaffeineTest
+                - caffeine:standaloneTest
                 - caffeine:lincheckTest
                 - caffeine:isolatedTest
                 - caffeine:junitTest

.github/workflows/actionlint.yml

@@ -16,7 +16,7 @@ jobs:
             github.com:443
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: actionlint
-        uses: reviewdog/action-actionlint@08ef4afa963243489a457cca426f705ce4e0d1a5 # v1.60.0
+        uses: reviewdog/action-actionlint@534eb894142bcf31616e5436cbe4214641c58101 # v1.61.0
         env:
           SHELLCHECK_OPTS: -e SC2001 -e SC2035 -e SC2046 -e SC2061 -e SC2086 -e SC2156
         with:

.github/workflows/build.yml

@@ -106,6 +106,7 @@ jobs:
           - caffeine:strongKeysAndSoftValuesSyncCaffeineTest
           - caffeine:weakKeysAndWeakValuesSyncCaffeineTest
           - caffeine:weakKeysAndSoftValuesSyncCaffeineTest
+          - caffeine:standaloneTest
           - caffeine:lincheckTest
           - caffeine:isolatedTest
           - caffeine:junitTest

.github/workflows/spelling.yml

@@ -34,4 +34,4 @@ jobs:
             objects.githubusercontent.com:443
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Typos
-        uses: crate-ci/typos@9d890159570d5018df91fedfa40b4730cd4a81b1 # v1.28.4
+        uses: crate-ci/typos@c8fd3764afbf5eaf6e53d2e6571c835db2c8fa5f # v1.29.0

caffeine/build.gradle.kts

@@ -161,19 +161,18 @@ tasks.named<JavaCompile>("compileJmhJava").configure {
   }
 }
 
-tasks.test.configure {
+val standaloneTest = tasks.register<Test>("standaloneTest") {
+  group = "Verification"
+  description = "Tests that are not part of an explicit suite"
   exclude("com/github/benmanes/caffeine/cache/**")
-  dependsOn(junitTest)
-
   useTestNG {
     threadCount = max(6, Runtime.getRuntime().availableProcessors() - 1)
-    jvmArgs("-XX:+UseG1GC", "-XX:+ParallelRefProcEnabled")
     excludeGroups("slow", "isolated", "lincheck")
     parallel = "methods"
   }
 }
 
-tasks.register<Test>("isolatedTest") {
+val isolatedTest = tasks.register<Test>("isolatedTest") {
   group = "Verification"
   description = "Tests that must be run in isolation"
   useTestNG {
@@ -182,7 +181,7 @@ tasks.register<Test>("isolatedTest") {
   }
 }
 
-tasks.register<Test>("lincheckTest") {
+val lincheckTest = tasks.register<Test>("lincheckTest") {
   group = "Verification"
   description = "Tests that assert linearizability"
   enabled = !isEarlyAccess()
@@ -194,30 +193,39 @@ tasks.register<Test>("lincheckTest") {
   }
 }
 
-tasks.register<Test>("fuzzTest") {
+val fuzzTest = tasks.register<Test>("fuzzTest") {
   group = "Verification"
   description = "Fuzz tests"
+  include("com/github/benmanes/caffeine/fuzz/**")
 
-  forkEvery = 1
-  failFast = true
-  useJUnitPlatform()
-  testLogging.events("started")
   environment("JAZZER_FUZZ", "1")
-  include("com/github/benmanes/caffeine/fuzz/**")
+  testLogging.events("started")
+  useJUnitPlatform()
+  failFast = true
+  forkEvery = 1
 }
 
 val junitTest = tasks.register<Test>("junitTest") {
   group = "Verification"
   description = "JUnit tests"
+  exclude("com/github/benmanes/caffeine/fuzz/**")
 
   val jar by tasks.existing(Jar::class)
   dependsOn(jar)
 
-  useJUnit()
-  failFast = true
-  maxHeapSize = "2g"
-  exclude("com/github/benmanes/caffeine/fuzz/**")
   systemProperty("caffeine.osgi.jar", relativePath(jar.get().archiveFile.get().asFile.path))
+  maxHeapSize = "2g"
+  failFast = true
+  useJUnit()
+}
+
+tasks.test.configure {
+  exclude("com/github/benmanes/caffeine/**")
+  dependsOn(standaloneTest)
+  dependsOn(isolatedTest)
+  dependsOn(lincheckTest)
+  dependsOn(junitTest)
+  dependsOn(fuzzTest)
 }
 
 tasks.jar {

caffeine/src/main/java/com/github/benmanes/caffeine/cache/BoundedLocalCache.java

@@ -3338,6 +3338,16 @@ public Iterator<K> iterator() {
     public Spliterator<K> spliterator() {
       return new KeySpliterator<>(cache);
     }
+
+    @Override
+    public Object[] toArray() {
+      return cache.collectKeys() ? super.toArray() : cache.data.keySet().toArray();
+    }
+
+    @Override
+    public <T> T[] toArray(T[] array) {
+      return cache.collectKeys() ? super.toArray(array) : cache.data.keySet().toArray(array);
+    }
   }
 
   /** An adapter to safely externalize the key iterator. */

caffeine/src/main/java/com/github/benmanes/caffeine/cache/UnboundedLocalCache.java

@@ -676,6 +676,16 @@ public Iterator<K> iterator() {
     public Spliterator<K> spliterator() {
       return cache.data.keySet().spliterator();
     }
+
+    @Override
+    public Object[] toArray() {
+      return cache.data.keySet().toArray();
+    }
+
+    @Override
+    public <T> T[] toArray(T[] array) {
+      return cache.data.keySet().toArray(array);
+    }
   }
 
   /** An adapter to safely externalize the key iterator. */
@@ -804,6 +814,16 @@ public Iterator<V> iterator() {
     public Spliterator<V> spliterator() {
       return cache.data.values().spliterator();
     }
+
+    @Override
+    public Object[] toArray() {
+      return cache.data.values().toArray();
+    }
+
+    @Override
+    public <T> T[] toArray(T[] array) {
+      return cache.data.values().toArray(array);
+    }
   }
 
   /** An adapter to safely externalize the value iterator. */
@@ -939,6 +959,16 @@ public Iterator<Entry<K, V>> iterator() {
     public Spliterator<Entry<K, V>> spliterator() {
       return new EntrySpliterator<>(cache);
     }
+
+    @Override
+    public Object[] toArray() {
+      return cache.data.entrySet().toArray();
+    }
+
+    @Override
+    public <T> T[] toArray(T[] array) {
+      return cache.data.entrySet().toArray(array);
+    }
   }
 
   /** An adapter to safely externalize the entry iterator. */

caffeine/src/test/java/com/github/benmanes/caffeine/jsr166/package-info.java

@@ -1,6 +1,6 @@
 @NullMarked
 @CheckReturnValue
-package com.github.benmanes.caffeine.jsr166;
+package com.github.benmanes.caffeine.openjdk.concurrent.tck;
 
 import org.jspecify.annotations.NullMarked;