Merge branch 'cross-schema/pr4' into cross-schema/pr5

Author: arnaud-lacurie

fdb-relational-core/src/test/java/com/apple/foundationdb/relational/recordlayer/query/cache/PlanCacheSchemaKeyTest.java

@@ -0,0 +1,71 @@
+/*
+ * PlanCacheSchemaKeyTest.java
+ *
+ * This source file is part of the FoundationDB open source project
+ *
+ * Copyright 2021-2025 Apple Inc. and the FoundationDB project authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.apple.foundationdb.relational.recordlayer.query.cache;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+
+class PlanCacheSchemaKeyTest {
+
+    @Test
+    void ofCollectionProducesSortedKey() {
+        final List<String> names = Arrays.asList("schema_b", "schema_a", "schema_c");
+        final PlanCacheSchemaKey key = PlanCacheSchemaKey.of(names);
+        assertEquals(List.of("schema_a", "schema_b", "schema_c"), List.copyOf(key.getSchemaNames()));
+    }
+
+    @Test
+    void ofCollectionEqualsSingletonOfForSingleElement() {
+        final PlanCacheSchemaKey fromCollection = PlanCacheSchemaKey.of(List.of("my_schema"));
+        final PlanCacheSchemaKey fromSingle = PlanCacheSchemaKey.of("my_schema");
+        assertEquals(fromSingle, fromCollection);
+        assertEquals(fromSingle.hashCode(), fromCollection.hashCode());
+    }
+
+    @Test
+    void ofCollectionOrderIndependent() {
+        final PlanCacheSchemaKey k1 = PlanCacheSchemaKey.of(Arrays.asList("alpha", "beta"));
+        final PlanCacheSchemaKey k2 = PlanCacheSchemaKey.of(Arrays.asList("beta", "alpha"));
+        assertEquals(k1, k2);
+        assertEquals(k1.hashCode(), k2.hashCode());
+    }
+
+    @Test
+    void toStringSingleSchema() {
+        assertEquals("my_schema", PlanCacheSchemaKey.of("my_schema").toString());
+    }
+
+    @Test
+    void toStringMultiSchemaJoinedWithPipe() {
+        final PlanCacheSchemaKey key = PlanCacheSchemaKey.of(Arrays.asList("schema_b", "schema_a"));
+        assertEquals("schema_a|schema_b", key.toString());
+    }
+
+    @Test
+    void differentSchemasDontMatch() {
+        assertNotEquals(PlanCacheSchemaKey.of("schema_x"), PlanCacheSchemaKey.of("schema_y"));
+    }
+}