add unit tests for toString methods

Author: patinthehat

tests/CodeSnippetTest.php

@@ -149,4 +149,26 @@ public function it_ensures_the_entire_surrounding_lines_are_displayed()
 
         $this->assertMatchesSnapshot($snippet->getLines());
     }
+
+    /** @test */
+    public function it_returns_the_snippet_as_a_string()
+    {
+        $snippet = (new CodeSnippet())
+            ->surroundingLines(10, 12)
+            ->snippetLineCount(8)
+            ->fromFile($this->testsPath('data/file3.php'));
+
+        $this->assertMatchesSnapshot($snippet->toString());
+    }
+
+    /** @test */
+    public function it_returns_a_string_when_the_snippet_is_cast_to_a_string()
+    {
+        $snippet = (new CodeSnippet())
+            ->surroundingLines(10, 12)
+            ->snippetLineCount(8)
+            ->fromFile($this->testsPath('data/file3.php'));
+
+        $this->assertMatchesSnapshot((string)$snippet);
+    }
 }

tests/__snapshots__/CodeSnippetTest__it_returns_a_string_when_the_snippet_is_cast_to_a_string__1.txt

@@ -0,0 +1,8 @@
+        /**
+        @var Ray $ray
+         */
+        $ray = ray()->text('hello world')
+            ->blue()
+            ->large();
+
+        Ray

tests/__snapshots__/CodeSnippetTest__it_returns_the_snippet_as_a_string__1.txt

@@ -0,0 +1,8 @@
+        /**
+        @var Ray $ray
+         */
+        $ray = ray()->text('hello world')
+            ->blue()
+            ->large();
+
+        Ray