Fix bug in Cassandra

Author: KodaiD

core/src/main/java/com/scalar/db/storage/cassandra/CassandraAdmin.java

@@ -444,7 +444,7 @@ public void renameColumn(
       TableMetadata tableMetadata = getTableMetadata(namespace, table);
       assert tableMetadata != null;
       if (!tableMetadata.getPartitionKeyNames().contains(oldColumnName)
-          || !tableMetadata.getClusteringKeyNames().contains(oldColumnName)) {
+          && !tableMetadata.getClusteringKeyNames().contains(oldColumnName)) {
         throw new IllegalArgumentException(
             CoreError.CASSANDRA_RENAME_NON_PRIMARY_KEY_COLUMN_NOT_SUPPORTED.buildMessage());
       }

core/src/test/java/com/scalar/db/storage/cassandra/CassandraAdminTest.java

@@ -897,8 +897,18 @@ public void renameColumn_ShouldWorkProperly() throws ExecutionException {
     // Arrange
     String namespace = "sample_ns";
     String table = "tbl";
-    String oldColumnName = "c2";
-    String newColumnName = "c3";
+    String oldColumnName = "c1";
+    String newColumnName = "c2";
+    com.datastax.driver.core.TableMetadata tableMetadata =
+        mock(com.datastax.driver.core.TableMetadata.class);
+    ColumnMetadata c1 = mock(ColumnMetadata.class);
+    when(c1.getName()).thenReturn(oldColumnName);
+    when(c1.getType()).thenReturn(com.datastax.driver.core.DataType.text());
+    when(tableMetadata.getPartitionKey()).thenReturn(Collections.singletonList(c1));
+    when(tableMetadata.getClusteringColumns()).thenReturn(Collections.emptyList());
+    when(tableMetadata.getIndexes()).thenReturn(Collections.emptyList());
+    when(tableMetadata.getColumns()).thenReturn(Collections.singletonList(c1));
+    when(clusterManager.getMetadata(any(), any())).thenReturn(tableMetadata);
 
     // Act
     cassandraAdmin.renameColumn(namespace, table, oldColumnName, newColumnName);