Add Opera Browser support

Author: mdmintz

help_docs/webdriver_installation.md

@@ -21,6 +21,8 @@ Here's where you can go to manually install web drivers from the source:
 
 * For Safari, get [Safari Driver](https://github.com/seleniumbase/SeleniumBase/blob/master/help_docs/using_safari_driver.md) on your System PATH.
 
+* For Opera, get [Opera Chromium Driver](https://github.com/operasoftware/operachromiumdriver/releases) on your System PATH..
+
 * For PhantomJS headless browser automation, get [PhantomJS](http://phantomjs.org/download.html) on your System PATH. (NOTE: <i>PhantomJS is no longer officially supported by SeleniumHQ</i>)
 
 **Mac**:

seleniumbase/core/browser_launcher.py

@@ -12,16 +12,20 @@
 from seleniumbase.fixtures import page_utils
 import drivers  # webdriver storage folder for SeleniumBase
 DRIVER_DIR = os.path.dirname(os.path.realpath(drivers.__file__))
+PLATFORM = sys.platform
 LOCAL_CHROMEDRIVER = None
 LOCAL_GECKODRIVER = None
 LOCAL_EDGEDRIVER = None
-if "darwin" in sys.platform or "linux" in sys.platform:
+LOCAL_OPERADRIVER = None
+if "darwin" in PLATFORM or "linux" in PLATFORM:
     LOCAL_CHROMEDRIVER = DRIVER_DIR + '/chromedriver'
     LOCAL_GECKODRIVER = DRIVER_DIR + '/geckodriver'
-elif "win32" in sys.platform or "win64" in sys.platform:
+    LOCAL_OPERADRIVER = DRIVER_DIR + '/operadriver'
+elif "win32" in PLATFORM or "win64" in PLATFORM or "x64" in PLATFORM:
     LOCAL_EDGEDRIVER = DRIVER_DIR + '/MicrosoftWebDriver.exe'
     LOCAL_CHROMEDRIVER = DRIVER_DIR + '/chromedriver.exe'
     LOCAL_GECKODRIVER = DRIVER_DIR + '/geckodriver.exe'
+    LOCAL_OPERADRIVER = DRIVER_DIR + '/operadriver.exe'
 else:
     # Cannot determine system
     pass  # SeleniumBase will use web drivers from the System PATH by default
@@ -217,6 +221,11 @@ def get_remote_driver(browser_name, headless, servername, port, proxy_string):
             command_executor=address,
             desired_capabilities=(
                 webdriver.DesiredCapabilities.SAFARI))
+    elif browser_name == constants.Browser.OPERA:
+        return webdriver.Remote(
+            command_executor=address,
+            desired_capabilities=(
+                webdriver.DesiredCapabilities.OPERA))
     elif browser_name == constants.Browser.PHANTOM_JS:
         with warnings.catch_warnings():
             # Ignore "PhantomJS has been deprecated" UserWarning
@@ -282,6 +291,12 @@ def get_local_driver(browser_name, headless, proxy_string):
             return webdriver.Edge(capabilities=edge_capabilities)
     elif browser_name == constants.Browser.SAFARI:
         return webdriver.Safari()
+    elif browser_name == constants.Browser.OPERA:
+        if LOCAL_OPERADRIVER and os.path.exists(LOCAL_OPERADRIVER):
+            make_driver_executable_if_not(LOCAL_OPERADRIVER)
+            return webdriver.Opera(executable_path=LOCAL_OPERADRIVER)
+        else:
+            return webdriver.Opera()
     elif browser_name == constants.Browser.PHANTOM_JS:
         with warnings.catch_warnings():
             # Ignore "PhantomJS has been deprecated" UserWarning

seleniumbase/fixtures/constants.py

@@ -18,33 +18,37 @@ class Files:
 
 
 class ValidBrowsers:
-    valid_browsers = ["firefox", "ie", "edge", "safari", "chrome", "phantomjs"]
+    valid_browsers = (
+        ["chrome", "edge", "firefox", "ie", "opera", "phantomjs", "safari"])
 
 
 class Browser:
+    GOOGLE_CHROME = "chrome"
+    EDGE = "edge"
     FIREFOX = "firefox"
     INTERNET_EXPLORER = "ie"
-    EDGE = "edge"
-    SAFARI = "safari"
-    GOOGLE_CHROME = "chrome"
+    OPERA = "opera"
     PHANTOM_JS = "phantomjs"
+    SAFARI = "safari"
 
     VERSION = {
+        "chrome": None,
+        "edge": None,
         "firefox": None,
         "ie": None,
-        "edge": None,
-        "safari": None,
-        "chrome": None,
-        "phantomjs": None
+        "opera": None,
+        "phantomjs": None,
+        "safari": None
     }
 
     LATEST = {
+        "chrome": None,
+        "edge": None,
         "firefox": None,
         "ie": None,
-        "edge": None,
-        "safari": None,
-        "chrome": None,
-        "phantomjs": None
+        "opera": None,
+        "phantomjs": None,
+        "safari": None
     }