feature: #1319 add table module pattern (#1742)

* modify table module pattern

* fix code smells

* resolve conversation

Co-authored-by: tao-sun2 <sustc18st@gmai.com>
Co-authored-by: Ilkka Seppälä <iluwatar@users.noreply.github.com>

table-module/src/test/java/com/iluwatar/tablemodule/AppTest.java

@@ -0,0 +1,16 @@
+package com.iluwatar.tablemodule;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+
+/**
+ * Tests that the table module example runs without errors.
+ */
+class AppTest {
+
+  @Test
+  void shouldExecuteWithoutException() {
+    assertDoesNotThrow(() -> App.main(new String[]{}));
+  }
+}

table-module/src/test/java/com/iluwatar/tablemodule/UserTableModuleTest.java

@@ -0,0 +1,78 @@
+package com.iluwatar.tablemodule;
+
+import org.h2.jdbcx.JdbcDataSource;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import javax.sql.DataSource;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+class UserTableModuleTest {
+  private static final String DB_URL = "jdbc:h2:~/test";
+
+  private static DataSource createDataSource() {
+    var dataSource = new JdbcDataSource();
+    dataSource.setURL(DB_URL);
+    return dataSource;
+  }
+
+  @BeforeEach
+  void setUp() throws SQLException {
+    try (var connection = DriverManager.getConnection(DB_URL);
+         var statement = connection.createStatement()) {
+      statement.execute(UserTableModule.DELETE_SCHEMA_SQL);
+      statement.execute(UserTableModule.CREATE_SCHEMA_SQL);
+    }
+  }
+
+  @AfterEach
+  void tearDown() throws SQLException {
+    try (var connection = DriverManager.getConnection(DB_URL);
+         var statement = connection.createStatement()) {
+      statement.execute(UserTableModule.DELETE_SCHEMA_SQL);
+    }
+  }
+
+  @Test
+  void loginShouldFail() throws SQLException {
+    var dataSource = createDataSource();
+    var userTableModule = new UserTableModule(dataSource);
+    var user = new User(1, "123456", "123456");
+    assertEquals(0, userTableModule.login(user.getUsername(),
+            user.getPassword()));
+  }
+
+  @Test
+  void loginShouldSucceed() throws SQLException {
+    var dataSource = createDataSource();
+    var userTableModule = new UserTableModule(dataSource);
+    var user = new User(1, "123456", "123456");
+    userTableModule.registerUser(user);
+    assertEquals(1, userTableModule.login(user.getUsername(),
+            user.getPassword()));
+  }
+
+  @Test
+  void registerShouldFail() throws SQLException {
+    var dataSource = createDataSource();
+    var userTableModule = new UserTableModule(dataSource);
+    var user = new User(1, "123456", "123456");
+    userTableModule.registerUser(user);
+    assertThrows(SQLException.class, () -> {
+      userTableModule.registerUser(user);
+    });
+  }
+
+  @Test
+  void registerShouldSucceed() throws SQLException {
+    var dataSource = createDataSource();
+    var userTableModule = new UserTableModule(dataSource);
+    var user = new User(1, "123456", "123456");
+    assertEquals(1, userTableModule.registerUser(user));
+  }
+}

table-module/src/test/java/com/iluwatar/tablemodule/UserTest.java

@@ -0,0 +1,131 @@
+package com.iluwatar.tablemodule;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class UserTest {
+  @Test
+  void testCanEqual() {
+    assertFalse((new User(1, "janedoe", "iloveyou"))
+            .canEqual("Other"));
+  }
+
+  @Test
+  void testCanEqual2() {
+    var user = new User(1, "janedoe", "iloveyou");
+    assertTrue(user.canEqual(new User(1, "janedoe",
+            "iloveyou")));
+  }
+
+  @Test
+  void testEquals1() {
+    var user = new User(1, "janedoe", "iloveyou");
+    assertNotEquals("42", user);
+  }
+
+  @Test
+  void testEquals2() {
+    var user = new User(1, "janedoe", "iloveyou");
+    assertEquals(user, new User(1, "janedoe",
+            "iloveyou"));
+  }
+
+  @Test
+  void testEquals3() {
+    var user = new User(123, "janedoe", "iloveyou");
+    assertNotEquals(user, new User(1, "janedoe",
+            "iloveyou"));
+  }
+
+  @Test
+  void testEquals4() {
+    var user = new User(1, null, "iloveyou");
+    assertNotEquals(user, new User(1, "janedoe",
+            "iloveyou"));
+  }
+
+  @Test
+  void testEquals5() {
+    var user = new User(1, "iloveyou", "iloveyou");
+    assertNotEquals(user, new User(1, "janedoe",
+            "iloveyou"));
+  }
+
+  @Test
+  void testEquals6() {
+    var user = new User(1, "janedoe", "janedoe");
+    assertNotEquals(user, new User(1, "janedoe",
+            "iloveyou"));
+  }
+
+  @Test
+  void testEquals7() {
+    var user = new User(1, "janedoe", null);
+    assertNotEquals(user, new User(1, "janedoe",
+            "iloveyou"));
+  }
+
+  @Test
+  void testEquals8() {
+    var user = new User(1, null, "iloveyou");
+    assertEquals(user, new User(1, null,
+            "iloveyou"));
+  }
+
+  @Test
+  void testEquals9() {
+    var user = new User(1, "janedoe", null);
+    assertEquals(user, new User(1, "janedoe",
+            null));
+  }
+
+  @Test
+  void testHashCode1() {
+    assertEquals(-1758941372, (new User(1, "janedoe",
+            "iloveyou")).hashCode());
+
+  }
+
+  @Test
+  void testHashCode2() {
+    assertEquals(-1332207447, (new User(1, null,
+            "iloveyou")).hashCode());
+  }
+
+  @Test
+  void testHashCode3() {
+    assertEquals(-426522485, (new User(1, "janedoe",
+            null)).hashCode());
+  }
+
+  @Test
+  void testSetId() {
+    var user = new User(1, "janedoe", "iloveyou");
+    user.setId(2);
+    assertEquals(2, user.getId());
+  }
+
+  @Test
+  void testSetPassword() {
+    var user = new User(1, "janedoe", "tmp");
+    user.setPassword("iloveyou");
+    assertEquals("iloveyou", user.getPassword());
+  }
+
+  @Test
+  void testSetUsername() {
+    var user = new User(1, "tmp", "iloveyou");
+    user.setUsername("janedoe");
+    assertEquals("janedoe", user.getUsername());
+  }
+
+  @Test
+  void testToString() {
+    var user = new User(1, "janedoe", "iloveyou");
+    assertEquals(String.format("User(id=%s, username=%s, password=%s)",
+            user.getId(), user.getUsername(), user.getPassword()),
+            user.toString());
+  }
+}
+