fix os_test.v

doc/docs.md

@@ -1069,6 +1069,12 @@ fn test_hello() {
 
 All test functions have to be placed in `*_test.v` files and begin with `test_`.
 
+You can also define a special test function: `testsuite_begin`, which will be 
+run *before* all other test functions in a `_test.v` file.
+
+You can also define a special test function: `testsuite_end`, which will be 
+run *after* all other test functions in a `_test.v` file.
+
 To run the tests do `v hello_test.v`.
 
 To test an entire module, do `v test mymodule`.

vlib/compiler/table.v

@@ -819,11 +819,28 @@ fn (t &Table) main_exists() bool {
 }
 
 fn (t &Table) all_test_function_names() []string {
-	mut res := []string
+	mut fn_begin_test_name := ''
+	mut fn_end_test_name := ''
+
+	mut fn_test_names := []string
 	for _, f in t.fns {
 		if f.name.contains('__test_') {
-			res << f.name
+			fn_test_names << f.name
 		}
+		else if f.name.contains('__testsuite_begin') {
+			fn_begin_test_name = f.name
+		}
+		else if f.name.contains('__testsuite_end') {
+			fn_end_test_name = f.name
+		}
+	}
+	mut res := []string
+	if fn_begin_test_name.len > 0 {
+		res << fn_begin_test_name
+	}
+	res << fn_test_names
+	if fn_end_test_name.len > 0 {
+		res << fn_end_test_name
 	}
 	return res
 }
@@ -1142,4 +1159,3 @@ fn type_cat_str(tc TypeCategory) string {
 			'unknown'}}
 	return tc_str
 }
-

vlib/os/os.v

@@ -624,7 +624,7 @@ pub fn rmdir(path string) {
 
 pub fn rmdir_recursive(path string) {
 	items := os.ls(path) or {
-		panic(err)
+		return
 	}
 	for item in items {
 		if os.is_dir(filepath.join(path,item)) {
@@ -637,7 +637,7 @@ pub fn rmdir_recursive(path string) {
 
 pub fn is_dir_empty(path string) bool {
 	items := os.ls(path) or {
-		panic(err)
+		return true
 	}
 	return items.len == 0
 }

vlib/os/os_test.v

@@ -1,9 +1,14 @@
-import os
-import filepath
+import (
+	os
+	filepath
+)
 
-fn test_aaa_setup(){
+fn testsuite_begin() {
+	cleanup_leftovers()
+}
+
+fn testsuite_end() {
 	cleanup_leftovers()
-	assert true
 }
 
 fn test_setenv() {
@@ -240,11 +245,6 @@ fn test_make_symlink_check_is_link_and_remove_symlink() {
 //  }
 //}
 
-fn test_zzz_cleanup(){
-	cleanup_leftovers() assert true
-}
-
-
 fn test_symlink() {
   $if windows { return }
   os.mkdir('symlink') or { panic(err) }
@@ -285,18 +285,14 @@ fn test_is_executable_writable_readable() {
 // this function is called by both test_aaa_setup & test_zzz_cleanup
 // it ensures that os tests do not polute the filesystem with leftover
 // files so that they can be run several times in a row.
-fn cleanup_leftovers(){
+fn cleanup_leftovers() {
 	// possible leftovers from test_cp
 	os.rm('cp_example.txt')
 	os.rm('cp_new_example.txt')
 
 	// possible leftovers from test_cp_r
-	os.rm('ex/ex2/ex2.txt')
-	os.rmdir('ex/ex2')
-	os.rm('ex/ex1.txt')
-	os.rmdir('ex')
-	os.rm('ex2/ex2.txt')
-	os.rmdir('ex2')
+	os.rmdir_recursive('ex')
+	os.rmdir_recursive('ex2')
 	os.rm('ex1.txt')
 	os.rm('ex2.txt')
 }