Shell: Add a test for control structures as commands

Shell/Tests/control-structure-as-command.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+setopt --verbose
+
+rm -rf shell-test 2> /dev/null
+mkdir shell-test
+cd shell-test
+
+    touch a b c
+
+    # Can we do logical stuff with control structures?
+    ls && for $(seq 1) { echo yes > listing }
+    test "$(cat listing)" = "yes" || echo for cannot appear as second part of '&&' && exit 1
+    rm listing
+
+    # FIXME: This should work!
+    # for $(seq 1) { echo yes > listing } && echo HELLO!
+    # test "$(cat listing)" = "yes" || echo for cannot appear as first part of '&&' && exit 1
+    # rm listing
+
+    # Can we pipe things into and from control structures?
+    ls | if true { cat > listing }
+    test "$(cat listing)" = "a b c" || echo if cannot be correctly redirected to && exit 1
+    rm listing
+
+    ls | for $(seq 1) { cat > listing }
+    test "$(cat listing)" = "a b c" || echo for cannot be correctly redirected to && exit 1
+    rm listing
+
+    for $(seq 4) { echo $it } | cat > listing
+    test "$(cat listing)" = "1 2 3 4" || echo for cannot be correctly redirected from && exit 1
+    rm listing
+
+    if true { echo TRUE! } | cat > listing
+    test "$(cat listing)" = "TRUE!" || echo if cannot be correctly redirected from && exit 1
+    rm listing
+
+cd ..
+rm -rf shell-test