Search for profiling tools executable paths when they are required

tests/fixtures/scripts/searchforme

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+echo "This is just used to test the path_utils.find_executable function"

tests/test_path_utils.py

@@ -0,0 +1,16 @@
+import os
+
+from nvcc4jupyter.path_utils import find_executable
+
+
+def test_which():
+    assert find_executable("ls") == "/usr/bin/ls"
+
+
+def test_find_executable(fixtures_path: str):
+    exec_path = find_executable("searchforme", [fixtures_path])
+    assert exec_path is not None
+
+    exec_dir, exec_fname = os.path.split(exec_path)
+    assert exec_fname == "searchforme"
+    assert os.path.basename(exec_dir) == "scripts"