1 files changed, 76 insertions, 0 deletions
diff --git a/test/system/015-help.bats b/test/system/015-help.bats
new file mode 100644
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+++ b/test/system/015-help.bats
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+#!/usr/bin/env bats
+#
+# Tests based on 'podman help'
+#
+# Find all commands listed by 'podman --help'. Run each one, make sure it
+# provides its own --help output. If the usage message ends in '[command]',
+# treat it as a subcommand, and recurse into its own list of sub-subcommands.
+#
+# Any usage message that ends in '[flags]' is interpreted as a command
+# that takes no further arguments; we confirm by running with 'invalid-arg'
+# and confirming that it exits with error status and message.
+#
+load helpers
+
+# run 'podman help', parse the output looking for 'Available Commands';
+# return that list.
+function podman_commands() {
+    dprint "$@"
+    run_podman help "$@" |\
+        awk '/^Available Commands:/{ok=1;next}/^Flags:/{ok=0}ok { print $1 }' |\
+        grep .
+    "$output"
+}
+
+
+function check_help() {
+    local count=0
+    local subcommands_found=0
+
+    for cmd in $(podman_commands "$@"); do
+        dprint "podman $@ $cmd --help"
+        run_podman "$@" $cmd --help
+
+        # The line immediately after 'Usage:' gives us a 1-line synopsis
+        usage=$(echo "$output" | grep -A1 '^Usage:' | tail -1)
+        [ -n "$usage" ] || die "podman $cmd: no Usage message found"
+
+        # If usage ends in '[command]', recurse into subcommands
+        if expr "$usage" : '.*\[command\]$' >/dev/null; then
+            subcommands_found=$(expr $subcommands_found + 1)
+            check_help "$@" $cmd
+            continue
+        fi
+
+        # If usage ends in '[flag]', command takes no more arguments.
+        # Confirm that by running with 'invalid-arg' and expecting failure.
+        if expr "$usage" : '.*\[flags\]$' >/dev/null; then
+            if [ "$cmd" != "help" ]; then
+                run_podman 125 "$@" $cmd invalid-arg
+                is "$output" "Error: .* takes no arguments" \
+                   "'podman $@ $cmd' with extra (invalid) arguments"
+            fi
+        fi
+
+        count=$(expr $count + 1)
+    done
+
+    # This can happen if the output of --help changes, such as between
+    # the old command parser and cobra.
+    [ $count -gt 0 ] || \
+        die "Internal error: no commands found in 'podman help $@' list"
+
+    # At least the top level must have some subcommands
+    if [ -z "$*" -a $subcommands_found -eq 0 ]; then
+        die "Internal error: did not find any podman subcommands"
+    fi
+}
+
+
+@test "podman help - basic tests" {
+    # Called with no args -- start with 'podman --help'. check_help() will
+    # recurse for any subcommands.
+    check_help
+}
+
+# vim: filetype=sh