Add unit test

Author: aaltat

utest/test/entry/__init__.py

@@ -0,0 +1,21 @@
+import subprocess
+import sys
+
+
+def test_version():
+    cmd = [
+        sys.executable,
+        "src/SeleniumLibrary/entry",
+        "--version"
+    ]
+    process = subprocess.run(cmd, capture_output=True, check=True)
+    lines = process.stdout.decode("utf-8").splitlines()
+    python_version = (
+        f"{sys.version_info.major}.{sys.version_info.minor}.{sys.version_info.micro}"
+    )
+    assert len(lines) == 5
+    assert "Used Python is: " in lines[0], lines[0]
+    assert python_version in lines[1], lines[1]
+    assert 'Robot Framework version: "' in lines[2], lines[2]
+    assert 'Installed SeleniumLibrary version is: ' in lines[3], lines[3]
+    assert 'Installed selenium version is: ' in lines[4], lines[4]