Tests: minor fixes.

Fixed temporary dir removing.
Fixed printing path to log.
Module checks moved to the separate file.

test/unit/check/go.py

@@ -0,0 +1,29 @@
+import os
+import subprocess
+
+
+def check_go(current_dir, temp_dir, test_dir):
+    if not os.path.exists(temp_dir + '/go'):
+        os.mkdir(temp_dir + '/go')
+
+    env = os.environ.copy()
+    env['GOPATH'] = current_dir + '/build/go'
+
+    try:
+        process = subprocess.Popen(
+            [
+                'go',
+                'build',
+                '-o',
+                temp_dir + '/go/app',
+                test_dir + '/go/empty/app.go',
+            ],
+            env=env,
+        )
+        process.communicate()
+
+        if process.returncode == 0:
+            return True
+
+    except:
+        return None