fix test scripts

Author: timhendriks93

scripts/prepare.sh

@@ -1,12 +1,13 @@
 #!/bin/bash
 
 PARENTDIR=$(dirname "$current_dir")
+TESTSDIR="$PARENTDIR/tests"
 
 blender \
     -noaudio \
     --background \
     --python-use-system-env \
     --python-exit-code 1 \
-    --python $PARENTDIR/tests/prepare.py
+    --python $TESTSDIR/prepare.py
 
 exit $?

scripts/test.sh

@@ -1,7 +1,8 @@
 #!/bin/bash
 
 PARENTDIR=$(dirname "$current_dir")
-TESTFILE="$PARENTDIR/tests/results.txt"
+TESTSDIR="$PARENTDIR/tests"
+TESTFILE="$TESTSDIR/results.txt"
 
 blender \
     -noaudio \

tests/prepare.py

@@ -23,6 +23,7 @@ def install_dependencies():
     dir_path = os.path.dirname(__file__)
     req_file = dir_path + "/../requirements-dev.txt"
 
+    subprocess.run([python, "-m", "pip", "install", "--upgrade", "pip"], check=True)
     subprocess.run([python, "-m", "pip", "install", "-r", req_file], check=True)
 
 if __name__ == "__main__":