From 713ab68fff1db580fd870e16c3b66cf1751637cc Mon Sep 17 00:00:00 2001
From: Hugues Devimeux <thespourieye@gmail.com>
Date: Fri, 22 May 2020 11:39:12 +0200
Subject: [PATCH 1/4] updated README

---
 README.md | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/README.md b/README.md
index f7124d52d3..a26816b114 100644
--- a/README.md
+++ b/README.md
@@ -193,11 +193,6 @@ For users:
 ```sh
 manim example_scenes.py SquareToCircle -pl
 ```
-1. Run the following command:
-For developers:
-```sh
-python3 manim.py example_scenes.py SquareToCircle -pl
-```
 
 ![](./readme-assets/command.png)
 

From 29e81721c647ba2620bc74ef41f1102ad1f5ba22 Mon Sep 17 00:00:00 2001
From: Hugues Devimeux <thespourieye@gmail.com>
Date: Fri, 22 May 2020 11:39:28 +0200
Subject: [PATCH 2/4] added dry_run flag

---
 manim/config.py | 35 ++++++++++++++++++++---------------
 1 file changed, 20 insertions(+), 15 deletions(-)

diff --git a/manim/config.py b/manim/config.py
index 1fb2e11ced..81368b6c20 100644
--- a/manim/config.py
+++ b/manim/config.py
@@ -23,67 +23,72 @@ def parse_cli():
             "-p", "--preview",
             action="store_true",
             help="Automatically open the saved file once its done",
-        ),
+        )
         parser.add_argument(
             "-w", "--write_to_movie",
             action="store_true",
             help="Render the scene as a movie file",
-        ),
+        )
         parser.add_argument(
             "-s", "--save_last_frame",
             action="store_true",
             help="Save the last frame",
-        ),
+        )
+        parser.add_argument(
+            "--dry_run", 
+            action="store_true",
+            help= "run a dry test",
+        )
         parser.add_argument(
             "-l", "--low_quality",
             action="store_true",
             help="Render at a low quality (for faster rendering)",
-        ),
+        )
         parser.add_argument(
             "-m", "--medium_quality",
             action="store_true",
             help="Render at a medium quality",
-        ),
+        )
         parser.add_argument(
             "--high_quality",
             action="store_true",
             help="Render at a high quality",
-        ),
+        )
         parser.add_argument(
             "-k", "--four_k",
             action="store_true",
             help="Render at a 4K quality",
-        ),
+        )
         parser.add_argument(
             "-g", "--save_pngs",
             action="store_true",
             help="Save each frame as a png",
-        ),
+        )
         parser.add_argument(
             "-i", "--save_as_gif",
             action="store_true",
             help="Save the video as gif",
-        ),
+        )
         parser.add_argument(
             "-f", "--show_file_in_finder",
             action="store_true",
             help="Show the output file in finder",
-        ),
+        )
         parser.add_argument(
             "-t", "--transparent",
             action="store_true",
             help="Render to a movie file with an alpha channel",
-        ),
+        )
         parser.add_argument(
             "-q", "--quiet",
             action="store_true",
             help="",
-        ),
+        )
         parser.add_argument(
             "-a", "--write_all",
             action="store_true",
             help="Write all the scenes from a file",
-        ),
+        )
         parser.add_argument(
             "-o", "--file_name",
             help="Specify the name of the output file, if"
@@ -140,8 +145,8 @@ def parse_cli():
 def get_configuration(args):
     file_writer_config = {
         # By default, write to file
-        "write_to_movie": args.write_to_movie or not args.save_last_frame,
-        "save_last_frame": args.save_last_frame,
+        "write_to_movie": (args.write_to_movie or not args.save_last_frame) and not args.dry_run,
+        "save_last_frame": args.save_last_frame and not args.dry_run,
         "save_pngs": args.save_pngs,
         "save_as_gif": args.save_as_gif,
         # If -t is passed in (for transparent), this will be RGBA

From c93339468cd291b601f08c2fbba04e1e64a345a1 Mon Sep 17 00:00:00 2001
From: Hugues Devimeux <thespourieye@gmail.com>
Date: Fri, 22 May 2020 11:39:47 +0200
Subject: [PATCH 3/4] added a very quick test

---
 tests/tests_sample_scenes.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tests/tests_sample_scenes.py b/tests/tests_sample_scenes.py
index feca458be3..438568822a 100644
--- a/tests/tests_sample_scenes.py
+++ b/tests/tests_sample_scenes.py
@@ -2,7 +2,11 @@
 
 # This file is intended to test any new feature added. 
 # Feel free to add a test or to modify one when adding a new/changing a feature. 
-
+class Test(Scene): 
+    def construct(self): 
+        square = Square()
+        self.play(ShowCreation(square))
+    
 class Test_geometry(Scene): 
     def construct(self):
         circle = Circle()

From 44717c8d882988ab573290a56e02bef3c5addbf2 Mon Sep 17 00:00:00 2001
From: Hugues Devimeux <thespourieye@gmail.com>
Date: Fri, 22 May 2020 13:37:57 +0200
Subject: [PATCH 4/4] changed help message

---
 manim/config.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/manim/config.py b/manim/config.py
index 81368b6c20..73e5a90b86 100644
--- a/manim/config.py
+++ b/manim/config.py
@@ -37,7 +37,7 @@ def parse_cli():
         parser.add_argument(
             "--dry_run", 
             action="store_true",
-            help= "run a dry test",
+            help= "Do a dry run (render scenes but generate no output files)",
         )
         parser.add_argument(
             "-l", "--low_quality",