add ExtractTune use case

tests/unit/AbcParser/Application/UseCases/ImportAbcFileTest.php

@@ -0,0 +1,72 @@
+<?php
+
+namespace Tests\Unit\AbcParser\Application\UseCases;
+
+use XaiCorp\AbcParser\Application\UseCases\ImportAbcFile;
+use XaiCorp\AbcParser\Domain\Core\TuneCollection;
+use XaiCorp\AbcParser\Domain\Modules\Interpreter\Builder;
+
+class ImportAbcFileTest extends \Codeception\Test\Unit
+{
+
+    /**
+     * @param string $filename
+     * @return bool|string
+     */
+    private function getAbc($filename = '/abc/valid_abc_1.abc')
+    {
+        return file_get_contents(codecept_data_dir($filename));
+    }
+
+
+    public function testCreate()
+    {
+        $importer = ImportAbcFile::create();
+
+        $this->assertInstanceOf(ImportAbcFile::class, $importer);
+    }
+
+    public function testCreateInjectingBuilder()
+    {
+        $builder = new Builder();
+        $importer = ImportAbcFile::create($builder);
+
+        $this->assertInstanceOf(ImportAbcFile::class, $importer);
+    }
+
+    public function testImport()
+    {
+        $abc = $this->getAbc('/abc/jigs.abc');
+        $importer = ImportAbcFile::create();
+
+        $result = $importer->import($abc);
+
+        $this->assertInstanceOf(TuneCollection::class, $result);
+        $this->assertGreaterThan(1, $result->count());
+    }
+
+    public function testImport2FilesConsecutively()
+    {
+        $abc2 = $this->getAbc('/abc/valid_abc_2.abc');
+        $abc3 = $this->getAbc('/abc/valid_abc_3.abc');
+        $importer = ImportAbcFile::create();
+
+        $result1 = $importer->import($abc2);
+        $result2 = $importer->import($abc3);
+
+        $this->assertNotEquals($result1, $result2);
+    }
+
+    public function testImportMultiple()
+    {
+        $abc1 = $this->getAbc('/abc/valid_abc_1.abc');
+        $abc2 = $this->getAbc('/abc/valid_abc_2.abc');
+        $abc3 = $this->getAbc('/abc/valid_abc_3.abc');
+        $importer = ImportAbcFile::create();
+
+        $result = $importer->importMultiple([$abc1, $abc2, $abc3]);
+
+        $this->assertInstanceOf(TuneCollection::class, $result);
+        $this->assertGreaterThan(1, $result->count());
+    }
+}