Add re-usable ComponentContextMock for unit tests

Author: jissereitsma

Test/Unit/Mock/ComponentContextMock.php

@@ -0,0 +1,32 @@
+<?php declare(strict_types=1);
+
+namespace Loki\Components\Test\Unit\Mock;
+
+use BadMethodCallException;
+use Loki\Components\Component\AbstractComponentContext;
+
+trait ComponentContextMock
+{
+    protected function getComponentContextMock(array $contextDependencies = []): AbstractComponentContext
+    {
+        $context = $this->getMockBuilder(AbstractComponentContext::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['__call'])
+            ->getMock();
+
+        $context->method('__call')
+            ->willReturnCallback(function (string $name, array $args) use ($contextDependencies) {
+                if ($args !== []) {
+                    throw new BadMethodCallException("Unexpected args for $name");
+                }
+
+                if (array_key_exists($name, $contextDependencies)) {
+                    return $contextDependencies[$name];
+                }
+
+                throw new BadMethodCallException("Unexpected method: $name");
+            });
+
+        return $context;
+    }
+}