Added assertContains deprecation coverage if using phpunit < 8.0

CHANGELOG.md

@@ -2,12 +2,20 @@
 
 All notable changes to `mail-intercept` will be documented in this file
 
-## 0.1.0 - 2019-12-06
+## 0.2.2 - 2020-03-11
 
-- Initial release
+- Added coverage for string assertion deprecations if using PHPUnit < 8.0
+
+## 0.2.1 - 2020-03-11
+
+- Fixed composer install command
 
 ## 0.2.0 - 2020-02-06
 
 - Added new assertions for sender, cc, bcc, content type, and reply to
 - Refactored to, from, and subject to use different getters
 - Update readme to include new assertions
+
+## 0.1.0 - 2019-12-06
+
+- Initial release

src/Assertions/ContentAssertions.php

@@ -14,22 +14,30 @@ trait ContentAssertions
      */
     public function assertMailBodyContainsString(string $needle, Swift_Message $mail)
     {
-        $this->assertStringContainsString(
+        $method = method_exists($this, 'assertStringContainsString')
+            ? 'assertStringContainsString'
+            : 'assertContains';
+
+        $this->{$method}(
             $needle,
             $mail->getBody(),
             "The expected [{$needle}] string was not found in the body."
         );
     }
 
     /**
-     * Assert mail body contains string.
+     * Assert mail body does not contain string.
      *
      * @param string $needle
      * @param Swift_Message $mail
      */
     public function assertMailBodyNotContainsString(string $needle, Swift_Message $mail)
     {
-        $this->assertStringNotContainsString(
+        $method = method_exists($this, 'assertStringNotContainsString')
+            ? 'assertStringNotContainsString'
+            : 'assertNotContains';
+
+        $this->{$method}(
             $needle,
             $mail->getBody(),
             "The expected [{$needle}] string was found in the body."