Modify Model set functions to abstract, create Access interactions, do test.

App/Models/Access.php

@@ -0,0 +1,146 @@
+<?php
+namespace App\Models;
+
+class Access extends \Core\Model
+{
+    public function __construct()
+    {
+        $this->createTable(
+            'user',
+            [
+                'id int(3) NOT NULL AUTO_INCREMENT',
+                'username varchar(25) NOT NULL',
+                'password char(13)',
+                'registered_at timestamp DEFAULT CURRENT_TIMESTAMP',
+                'PRIMARY KEY (id)'
+            ]
+        );
+    }
+
+    public function showAll()
+    {
+        try {
+            $db = static::connectDB();
+
+            $sql = "SELECT id, username, registered_at FROM user";
+
+            if ($stmt = $db->query($sql)) {
+                $result = $stmt->fetchAll(\PDO::FETCH_ASSOC);
+                return true;
+            }
+            return false;
+        } catch (PDOException $e) {
+            echo $e->getMessage();
+        }
+    }
+
+    public function showSingle($id)
+    {
+        try {
+            $db = static::connectDB();
+
+            $sql = "SELECT id, username, registered_at FROM user WHERE id = ?";
+
+            $query = $db->prepare($sql);
+
+            if ($query->execute([$id])) {
+                if ($query->rowCount() === 1) {
+                    $result = $query->fetchAll(\PDO::FETCH_ASSOC);
+                    return true;
+                }
+            }
+            return false;
+        } catch (PDOException $e) {
+            echo $e->getMessage();
+        }
+    }
+
+    public function entry($args)
+    {
+        if (count($args)) {
+            $keys = '`'.implode('`, `', array_keys($args)).'`';
+
+            $x = 1;
+            $values = '';
+            foreach ($args as $field) {
+                $values .= '?';
+                if ($x < count($args)) {
+                    $values .= ', ';
+                }
+                $x++;
+            }
+
+            try {
+                $db = static::connectDB();
+
+                $sql = "INSERT INTO user ({$keys}) VALUES ({$values})";
+
+                $query = $db->prepare($sql);
+
+                $x = 1;
+                foreach ($args as $value) {
+                    $query->bindValue($x, $value);
+                    $x++;
+                }
+
+                if ($query->execute()) {
+                    return true;
+                }
+                return false;
+            } catch (PDOException $e) {
+                echo $e->getMessage();
+            }
+        }
+    }
+
+    public function update($args, $id)
+    {
+        if (count($args)) {
+            $keys = array_keys($args);
+
+            $fields = [];
+            foreach ($keys as $key) {
+                $fields[] = $key.' = ?';
+            }
+
+            try {
+                $db = static::connectDB();
+
+                $sql = "UPDATE user SET ".implode(', ', $fields)." WHERE id = ?";
+
+                $query = $db->prepare($sql);
+                $x = 1;
+                foreach ($args as $value) {
+                    $query->bindValue($x, $value);
+                    $x++;
+                }
+                $query->bindValue($x, $id);
+
+                if ($query->execute()) {
+                    return true;
+                }
+                return false;
+            } catch (PDOException $e) {
+                echo $e->getMessage();
+            }
+        }
+    }
+
+    public function delete($id)
+    {
+        try {
+            $db = static::connectDB();
+
+            $sql = "DELETE FROM user WHERE id = ?";
+
+            $query = $db->prepare($sql);
+
+            if ($query->execute([$id])) {
+                return true;
+            }
+            return false;
+        } catch (PDOException $e) {
+            echo $e->getMessage();
+        }
+    }
+}

Core/Model.php

@@ -47,4 +47,14 @@ abstract class Model
         }
         return false;
     }
+
+    abstract public function showAll();
+
+    abstract public function showSingle($id);
+
+    abstract public function entry($args);
+
+    abstract public function update($args, $id);
+
+    abstract public function delete($id);
 }

_tests/unit/AccessTest.php

@@ -0,0 +1,36 @@
+<?php
+namespace App\Models;
+
+class AccessTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     *
+     * @test
+     */
+    public function databaseInteractionsSuccess()
+    {
+        $access = new Access();
+
+        $this->assertTrue($access->showAll());
+
+        $args = [
+            'username' => 'gregorio',
+            'password' => 'iniada13charc',
+        ];
+
+        $this->assertTrue($access->entry($args));
+
+        $args = [
+            'username' => 'masihgregorio',
+            'password' => 'inijuga3belas'
+        ];
+
+        $this->assertTrue($access->update($args, 1));
+
+        $this->assertTrue($access->showSingle(1));
+
+        $this->assertTrue($access->delete(1));
+
+        $this->assertTrue($access->dropTable('user'));
+    }
+}