chain resolver tests

tests/unit/Resolver/TestChainResolver.php

+<?php
+
+
+use WPDesk\View\Resolver\Exception\CanNotResolve;
+
+class TestChainResolver extends \PHPUnit\Framework\TestCase
+{
+    const RESPONSE_OF_FIRST_RESOLVER = 'first';
+    const RESPONSE_OF_SECOND_RESOLVER = 'second';
+
+    const RESOLVE_METHOD_NAME = 'resolve';
+
+    public function testUseSecondResolverWhenFirstFailed()
+    {
+        $firstResolver  = Mockery::mock(\WPDesk\View\Resolver\Resolver::class)
+                                 ->shouldReceive(self::RESOLVE_METHOD_NAME)
+                                 ->andThrowExceptions([CanNotResolve::class]);
+        $secondResolver = Mockery::mock(\WPDesk\View\Resolver\Resolver::class)
+                                 ->shouldReceive(self::RESOLVE_METHOD_NAME)
+                                 ->andReturn(self::RESPONSE_OF_SECOND_RESOLVER);
+
+        $resolver = new \WPDesk\View\Resolver\ChainResolver($firstResolver, $secondResolver);
+        $this->assertEquals(self::RESPONSE_OF_SECOND_RESOLVER, $resolver->resolver('whatever'));
+    }
+
+    public function testUseFirstResolverFirst()
+    {
+        $firstResolver = Mockery::mock(\WPDesk\View\Resolver\Resolver::class)
+                                ->shouldReceive(self::RESOLVE_METHOD_NAME)
+                                ->andReturn(self::RESPONSE_OF_FIRST_RESOLVER);
+
+        $secondResolver = Mockery::mock(\WPDesk\View\Resolver\Resolver::class)
+                                 ->shouldReceive(self::RESOLVE_METHOD_NAME)
+                                 ->andThrowExceptions([CanNotResolve::class]);
+
+        $resolver = new \WPDesk\View\Resolver\ChainResolver($firstResolver, $secondResolver);
+        $this->assertEquals(self::RESPONSE_OF_SECOND_RESOLVER, $resolver->resolver('whatever'));
+    }
+
+    public function testThrowExceptionWhenBothCannotFind()
+    {
+        $this->expectException(CanNotResolve::class);
+
+        $firstResolver  = Mockery::mock(\WPDesk\View\Resolver\Resolver::class)
+                                 ->shouldReceive(self::RESOLVE_METHOD_NAME)
+                                 ->andThrowExceptions([CanNotResolve::class]);
+
+        $secondResolver = Mockery::mock(\WPDesk\View\Resolver\Resolver::class)
+                                 ->shouldReceive(self::RESOLVE_METHOD_NAME)
+                                 ->andThrowExceptions([CanNotResolve::class]);
+
+        $resolver = new \WPDesk\View\Resolver\ChainResolver($firstResolver, $secondResolver);
+
+        $resolver->resolve('whatever2');
+    }
+}
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