Add testing testcase.

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

src/Testing/TestCase.php

@@ -0,0 +1,165 @@
+<?php
+
+namespace Orchestra\Canvas\Core\Testing;
+
+use Illuminate\Support\Collection;
+use Illuminate\Support\Str;
+use PHPUnit\Framework\Assert;
+
+class TestCase extends \Orchestra\Testbench\TestCase
+{
+    /**
+     * Stubs files.
+     *
+     * @var array
+     */
+    protected $files = [];
+
+    /**
+     * The filesystem implementation.
+     *
+     * @var \Illuminate\Filesystem\Filesystem
+     */
+    protected $filesystem;
+
+    /**
+     * Setup the test environment.
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->filesystem = $this->app['files'];
+
+        $this->cleanUpFiles();
+        $this->cleanUpMigrationFiles();
+    }
+
+    /**
+     * Teardown the test environment.
+     */
+    protected function tearDown(): void
+    {
+        $this->cleanUpFiles();
+        $this->cleanUpMigrationFiles();
+
+        parent::tearDown();
+
+        unset($this->filesystem);
+    }
+
+    /**
+     * Assert file does contains data.
+     */
+    protected function assertFileContains(array $contains, string $file, string $message = ''): void
+    {
+        $this->assertFilenameExists($file);
+
+        $haystack = $this->filesystem->get(
+            $this->app->basePath($file)
+        );
+
+        foreach ($contains as $needle) {
+            $this->assertStringContainsString($needle, $haystack, $message);
+        }
+    }
+
+    /**
+     * Assert file doesn't contains data.
+     */
+    protected function assertFileNotContains(array $contains, string $file, string $message = ''): void
+    {
+        $this->assertFilenameExists($file);
+
+        $haystack = $this->filesystem->get(
+            $this->app->basePath($file)
+        );
+
+        foreach ($contains as $needle) {
+            $this->assertStringNotContainsString($needle, $haystack, $message);
+        }
+    }
+
+    /**
+     * Assert file does contains data.
+     */
+    protected function assertMigrationFileContains(array $contains, string $file, string $message = ''): void
+    {
+        $haystack = $this->filesystem->get($this->getMigrationFile($file));
+
+        foreach ($contains as $needle) {
+            $this->assertStringContainsString($needle, $haystack, $message);
+        }
+    }
+
+    /**
+     * Assert file doesn't contains data.
+     */
+    protected function assertMigrationFileNotContains(array $contains, string $file, string $message = ''): void
+    {
+        $haystack = $this->filesystem->get($this->getMigrationFile($file));
+
+        foreach ($contains as $needle) {
+            $this->assertStringNotContainsString($needle, $haystack, $message);
+        }
+    }
+
+    /**
+     * Assert filename exists.
+     */
+    protected function assertFilenameExists(string $file): void
+    {
+        $appFile = $this->app->basePath($file);
+
+        $this->assertTrue($this->filesystem->exists($appFile), "Assert file {$file} does exist");
+    }
+
+    /**
+     * Assert filename not exists.
+     */
+    protected function assertFilenameNotExists(string $file): void
+    {
+        $appFile = $this->app->basePath($file);
+
+        $this->assertTrue(! $this->filesystem->exists($appFile), "Assert file {$file} doesn't exist");
+    }
+
+    /**
+     * Removes generated files.
+     */
+    protected function cleanUpFiles(): void
+    {
+        $this->filesystem->delete(
+            Collection::make($this->files)
+                ->transform(function ($file) {
+                    return $this->app->basePath($file);
+                })
+                ->filter(function ($file) {
+                    return $this->filesystem->exists($file);
+                })->all()
+        );
+    }
+
+    /**
+     * Removes generated migration files.
+     */
+    protected function getMigrationFile(string $filename): string
+    {
+        $migrationPath = $this->app->databasePath('migrations');
+
+        return $this->filesystem->glob("{$migrationPath}/*{$filename}")[0];
+    }
+
+    /**
+     * Removes generated migration files.
+     */
+    protected function cleanUpMigrationFiles(): void
+    {
+        $this->filesystem->delete(
+            Collection::make($this->filesystem->files($this->app->databasePath('migrations')))
+                ->filter(function ($file) {
+                    return Str::endsWith($file, '.php');
+                })->all()
+        );
+    }
+}