Shell: Add a test for loops

Shell/Tests/loop.sh

@@ -0,0 +1,50 @@
+#!/bin/sh
+
+singlecommand_ok=yes
+multicommand_ok=yes
+inlineexec_ok=yes
+implicit_ok=yes
+
+# Full form
+ # Empty
+for x in () { }
+
+ # Empty block but nonempty list
+for x in (1 2 3) { }
+
+ # Single command in block
+for cmd in ((test 1 = 1) (test 2 = 2)) {
+    $cmd || unset singlecommand_ok
+}
+
+ # Multiple commands in block
+for cmd in ((test 1 = 1) (test 2 = 2)) {
+    test -z "$cmd"
+    test -z "$cmd" && unset multicommand_ok
+
+}
+
+ # $(...) as iterable expression
+test_file=sh-test-1
+echo 1 > $test_file
+echo 2 >> $test_file
+echo 3 >> $test_file
+echo 4 >> $test_file
+lst=()
+for line in $(cat $test_file) {
+    lst=($lst $line)
+}
+test "$lst" = "1 2 3 4" || unset inlineexec_ok
+rm $test_file
+
+# Implicit var
+for ((test 1 = 1) (test 2 = 2)) {
+    $it || unset implicit_ok
+}
+
+test $singlecommand_ok || echo Fail: Single command inside for body
+test $multicommand_ok || echo Fail: Multiple commands inside for body
+test $inlineexec_ok || echo Fail: Inline Exec
+test $implicit_ok || echo Fail: implicit iter variable
+
+test "$singlecommand_ok $multicommand_ok $inlineexec_ok $implicit_ok" = "yes yes yes yes" || exit 1