test: 测试 Lambda 方式 SQL 列构建。

mybatis-flex-core/src/test/java/com/mybatisflex/coretest/LambdaSqlTest.java

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+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  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
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  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.mybatisflex.coretest;
+
+import com.github.vertical_blank.sqlformatter.SqlFormatter;
+import com.mybatisflex.core.query.QueryWrapper;
+import org.junit.Test;
+
+import static com.mybatisflex.core.query.QueryMethods.allColumns;
+import static com.mybatisflex.core.query.QueryMethods.defaultColumns;
+
+/**
+ * Lambda 构建 SQL 测试。
+ *
+ * @author 王帅
+ * @since 2023-10-01
+ */
+public class LambdaSqlTest {
+
+    public static void printSQL(QueryWrapper queryWrapper) {
+        System.out.println(SqlFormatter.format(queryWrapper.toSQL()));
+    }
+
+    @Test
+    public void test01() {
+        QueryWrapper queryWrapper = QueryWrapper.create()
+            .select()
+            .from(Account.class)
+            .join(Article.class).on(wrapper -> wrapper.where(Article::getAccountId).eq(Account::getId))
+            .where(Account::getAge).ge(18);
+
+        printSQL(queryWrapper);
+    }
+
+    @Test
+    public void test02() {
+        QueryWrapper queryWrapper = QueryWrapper.create()
+            .select(allColumns(Account.class, Article.class))
+            .from(Account.class)
+            .join(Article.class).on(wrapper -> wrapper.where(Article::getAccountId).eq(Account::getId))
+            .where(Account::getAge).ge(18);
+
+        printSQL(queryWrapper);
+    }
+
+    @Test
+    public void test03() {
+        QueryWrapper queryWrapper = QueryWrapper.create()
+            .select(allColumns(Account.class, Article.class))
+            .from(Account.class).as("ac")
+            .join(Article.class).as("ar").on(wrapper -> wrapper.where(Article::getAccountId).eq(Account::getId))
+            .where(Account::getAge).ge(18);
+
+        printSQL(queryWrapper);
+    }
+
+    @Test
+    public void test04() {
+        @SuppressWarnings("unchecked")
+        QueryWrapper queryWrapper = QueryWrapper.create()
+            .select(defaultColumns(Account.class))
+            .select(Article::getTitle, Article::getContent)
+            .from(Account.class).as("ac")
+            .join(Article.class).as("ar").on(wrapper -> wrapper.where(Article::getAccountId).eq(Account::getId))
+            .where(Account::getAge).ge(18);
+
+        printSQL(queryWrapper);
+    }
+
+    @Test
+    public void test05() {
+        QueryWrapper queryWrapper = QueryWrapper.create()
+            .select(defaultColumns(Account.class))
+            .select(allColumns(Article.class))
+            .from(Account.class).as("ac")
+            .join(Article.class).as("ar").on(wrapper -> wrapper.where(Article::getAccountId).eq(Account::getId))
+            .where(Account::getAge).ge(18);
+
+        printSQL(queryWrapper);
+    }
+
+}