Add the upload_file_test

Author: mdmintz

examples/upload_file_test.py

@@ -0,0 +1,19 @@
+from seleniumbase import BaseCase
+
+
+class FileUploadButtonTests(BaseCase):
+
+    """ The main purpose of this is to test the self.choose_file() method. """
+
+    def test_file_upload_button(self):
+        self.open("https://www.w3schools.com/jsref/tryit.asp"
+                  "?filename=tryjsref_fileupload_get")
+        self.wait_for_element('[id*="google_ads"]')
+        self.remove_elements('[id*="google_ads"]')
+        self.switch_to_frame('iframeResult')
+        self.add_css_style(
+            'input[type="file"]{zoom: 1.5;-moz-transform: scale(1.5);}')
+        self.highlight('input[type="file"]')
+        self.choose_file('input[type="file"]', "example_logs/screenshot.png")
+        self.demo_mode = True  # Adds highlighting to the assert statement
+        self.assert_element('input[type="file"]')