added some tests around obfuscation

Author: avigoldman

tests/specs/test-sparkpost.class.php

@@ -11,6 +11,19 @@ function setUp() {
         $this->SparkPost = new SparkPost();
     }
 
+    function test_obfuscate_api_key() {
+        $original_key='my_secret_key';
+        $obfuscated_key=SparkPost::obfuscate_api_key($original_key);
+
+        $this->assertNotFalse(strpos($obfuscated_key, '*'));
+        $this->assertEquals(substr($original_key, 0, 4), substr($obfuscated_key, 0, 4));
+    }
+
+    function test_is_key_obfuscated() {
+        $this->assertTrue(SparkPost::is_key_obfuscated('my_obfuscated_***'));
+        $this->assertFalse(SparkPost::is_key_obfuscated('my_unobfuscated_key'));
+    }
+
     function test_is_sandbox() {
         $this->assertTrue(SparkPost::is_sandbox('[email protected]'));
         $this->assertFalse(SparkPost::is_sandbox('[email protected]'));