Close contexts when clearing test context cache

spring-test/src/main/java/org/springframework/test/context/cache/ContextCache.java

@@ -314,7 +314,10 @@ default int getContextUsageCount() {
 	void reset();
 
 	/**
-	 * Clear all contexts from the cache, clearing context hierarchy information as well.
+	 * Clear all contexts from the cache, explicitly
+	 * {@linkplain org.springframework.context.ConfigurableApplicationContext#close() closing}
+	 * each context that is an instance of {@code ConfigurableApplicationContext}
+	 * and clearing context hierarchy information as well.
 	 */
 	void clear();
 

spring-test/src/main/java/org/springframework/test/context/cache/DefaultContextCache.java

@@ -426,6 +426,9 @@ public void reset() {
 	@Override
 	public void clear() {
 		synchronized (this.contextMap) {
+			for (MergedContextConfiguration key : new ArrayList<>(this.contextMap.keySet())) {
+				remove(key, HierarchyMode.CURRENT_LEVEL);
+			}
 			this.contextMap.clear();
 			this.hierarchyMap.clear();
 			this.contextUsageMap.clear();

spring-test/src/test/java/org/springframework/test/context/cache/LruContextCacheTests.java

@@ -81,6 +81,42 @@ void maxCacheSizeZero() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new DefaultContextCache(0));
 	}
 
+	@Test
+	void clearClosesContexts() {
+		DefaultContextCache cache = new DefaultContextCache(4);
+
+		cache.put(fooConfig, key -> fooContext);
+		cache.put(barConfig, key -> barContext);
+		cache.put(bazConfig, key -> bazContext);
+		assertCacheContents(cache, "Foo", "Bar", "Baz");
+
+		cache.clear();
+		assertCacheContents(cache);
+
+		verify(fooContext, times(1)).close();
+		verify(barContext, times(1)).close();
+		verify(bazContext, times(1)).close();
+		verify(abcContext, never()).close();
+	}
+
+	@Test
+	void resetClosesContexts() {
+		DefaultContextCache cache = new DefaultContextCache(4);
+
+		cache.put(fooConfig, key -> fooContext);
+		cache.put(barConfig, key -> barContext);
+		cache.get(fooConfig);
+		assertThat(cache.getHitCount()).isEqualTo(1);
+		assertCacheContents(cache, "Bar", "Foo");
+
+		cache.reset();
+		assertCacheContents(cache);
+		assertThat(cache.getHitCount()).isZero();
+
+		verify(fooContext, times(1)).close();
+		verify(barContext, times(1)).close();
+	}
+
 
 	@Nested
 	@SuppressWarnings("deprecation")