[9.x] Add mailable assertions

src/Illuminate/Mail/Mailable.php

@@ -1147,6 +1147,149 @@ public function hasMetadata($key, $value)
                (method_exists($this, 'envelope') && $this->envelope()->hasMetadata($key, $value));
     }
 
+    /**
+     * Assert that the mailable is from the given address.
+     *
+     * @param  object|array|string  $address
+     * @param  string|null  $name
+     * @return $this
+     */
+    public function assertFrom($address, $name = null)
+    {
+        $recipient = $this->formatAssertionRecipient($address, $name);
+
+        PHPUnit::assertTrue(
+            $this->hasFrom($address, $name),
+            "Email was not from expected address [{$recipient}]."
+        );
+
+        return $this;
+    }
+
+    /**
+     * Assert that the mailable has the given recipient.
+     *
+     * @param  object|array|string  $address
+     * @param  string|null  $name
+     * @return $this
+     */
+    public function assertTo($address, $name = null)
+    {
+        $recipient = $this->formatAssertionRecipient($address, $name);
+
+        PHPUnit::assertTrue(
+            $this->hasTo($address, $name),
+            "Did not see expected recipient [{$recipient}] in email recipients."
+        );
+
+        return $this;
+    }
+
+    /**
+     * Assert that the mailable has the given recipient.
+     *
+     * @param  object|array|string  $address
+     * @param  string|null  $name
+     * @return $this
+     */
+    public function assertHasTo($address, $name = null)
+    {
+        return $this->assertTo($address, $name);
+    }
+
+    /**
+     * Assert that the mailable has the given recipient.
+     *
+     * @param  object|array|string  $address
+     * @param  string|null  $name
+     * @return $this
+     */
+    public function assertHasCc($address, $name = null)
+    {
+        $recipient = $this->formatAssertionRecipient($address, $name);
+
+        PHPUnit::assertTrue(
+            $this->hasCc($address, $name),
+            "Did not see expected recipient [{$recipient}] in email recipients."
+        );
+
+        return $this;
+    }
+
+    /**
+     * Assert that the mailable has the given recipient.
+     *
+     * @param  object|array|string  $address
+     * @param  string|null  $name
+     * @return $this
+     */
+    public function assertHasBcc($address, $name = null)
+    {
+        $recipient = $this->formatAssertionRecipient($address, $name);
+
+        PHPUnit::assertTrue(
+            $this->hasBcc($address, $name),
+            "Did not see expected recipient [{$recipient}] in email recipients."
+        );
+
+        return $this;
+    }
+
+    /**
+     * Assert that the mailable has the given "reply to" address.
+     *
+     * @param  object|array|string  $address
+     * @param  string|null  $name
+     * @return $this
+     */
+    public function assertHasReplyTo($address, $name = null)
+    {
+        $replyTo = $this->formatAssertionRecipient($address, $name);
+
+        PHPUnit::assertTrue(
+            $this->hasReplyTo($address, $name),
+            "Did not see expected address [{$replyTo}] as email 'reply to' recipient."
+        );
+
+        return $this;
+    }
+
+    /**
+     * Format the mailable recipeint for display in an assertion message.
+     *
+     * @param  object|array|string  $address
+     * @param  string|null  $name
+     * @return string
+     */
+    private function formatAssertionRecipient($address, $name = null)
+    {
+        if (! is_string($address)) {
+            $address = json_encode($address);
+        }
+
+        if (filled($name)) {
+            $address .= ' ('.$name.')';
+        }
+
+        return $address;
+    }
+
+    /**
+     * Assert that the mailable has the given subject.
+     *
+     * @param  string  $subject
+     * @return $this
+     */
+    public function assertHasSubject($subject)
+    {
+        PHPUnit::assertTrue(
+            $this->hasSubject($subject),
+            "Did not see expected text [{$subject}] in email subject."
+        );
+
+        return $this;
+    }
+
     /**
      * Assert that the given text is present in the HTML email body.
      *
@@ -1329,6 +1472,39 @@ public function assertHasAttachmentFromStorageDisk($disk, $path, $name = null, a
         return $this;
     }
 
+    /**
+     * Assert that the mailable has the given tag.
+     *
+     * @param  string  $tag
+     * @return $this
+     */
+    public function assertHasTag($tag)
+    {
+        PHPUnit::assertTrue(
+            $this->hasTag($tag),
+            "Did not see expected tag [{$tag}] in email tags."
+        );
+
+        return $this;
+    }
+
+    /**
+     * Assert that the mailable has the given metadata.
+     *
+     * @param  string  $key
+     * @param  string  $value
+     * @return $this
+     */
+    public function assertHasMetadata($key, $value)
+    {
+        PHPUnit::assertTrue(
+            $this->hasMetadata($key, $value),
+            "Did not see expected key [{$key}] and value [{$value}] in email metadata."
+        );
+
+        return $this;
+    }
+
     /**
      * Render the HTML and plain-text version of the mailable into views for assertions.
      *