add tests

.gitignore

@@ -40,3 +40,6 @@ Makefile
 .Spotlight*
 .Trash*
 *[Tt]humbs.db
+
+# vim
+.*.sw[a-z]

test

@@ -0,0 +1,33 @@
+#!/bin/sh
+set -eu
+export PATH="$PWD/src:$PATH"
+if [ "$#" -eq 0 ]; then
+  # default arguments: all tests
+  set -- ./tests/*
+fi
+
+success=true
+for test in "$@"; do
+  printf "%-40s " "$test"
+  if "$test/test.sh" >"$test/result.txt" 2>&1; then
+    :
+  else
+    exit="$?"
+    echo "(exit: $exit)" >>"$test/result.txt"
+  fi
+  if git diff --quiet --exit-code "$test/result.txt"; then
+    echo PASS
+  else
+    echo FAIL
+    git diff "$test/result.txt"
+    echo
+    success=false
+  fi
+done
+
+if "$success"; then
+  echo PASS
+else
+  echo FAIL
+  exit 1
+fi

tests/async-subshell-unignore-signal/result.txt

@@ -0,0 +1,4 @@
+Scenario 0: "set -i" makes a subshell un-ignore SIGINT.
+Scenario 1: resetting SIGINT handler.
+Scenario 2: ignoring SIGINT.
+OK

tests/async-subshell-unignore-signal/test.sh

@@ -0,0 +1,38 @@
+#!/bin/sh
+shell=src/dash
+
+set -e
+
+SubshellWith() {
+        parent_pid=$(setsid "$shell" -c "( $1; sleep 99 ) </dev/null >/dev/null 2>&1 & echo \$\$")
+        sleep 1
+        subshell_pid=$(ps -o pid= -$parent_pid | tail -n 1)
+}
+
+trap 'kill -TERM -$parent_pid 2>/dev//null ||:' EXIT # Tear down after a failure.
+
+echo Scenario 0: '"set -i"' makes a subshell un-ignore SIGINT.
+SubshellWith 'set -i'
+kill -INT $subshell_pid
+if ps -p $subshell_pid | grep -q sleep; then
+  echo FAIL
+fi
+kill -TERM -$parent_pid 2>/dev//null ||: # Tear down.
+
+echo Scenario 1: resetting SIGINT handler.
+SubshellWith 'trap - INT'
+kill -INT -$parent_pid # kill the whole process group since that's the my use case
+if ps -p $subshell_pid | grep -q sleep; then
+  echo FAIL
+fi
+kill -TERM -$parent_pid 2>/dev//null ||: # Tear down.
+
+echo Scenario 2: ignoring SIGINT.
+SubshellWith 'trap "" INT'
+kill -INT $subshell_pid
+if ! ps -p $subshell_pid | grep -q sleep; then
+  echo FAIL
+fi
+kill -TERM -$parent_pid 2>/dev//null ||: # Tear down.
+
+echo OK

tests/backslash-outside-quotes/result.txt

@@ -0,0 +1 @@
+/b/c/

tests/backslash-outside-quotes/test.sh

@@ -0,0 +1,4 @@
+#!./src/dash
+a=/b/c/*
+b=\\
+echo ${a%$b*}

tests/dollar-dash-expansion/result.txt

@@ -0,0 +1,3 @@
+0: the options are e
+1: the options are fe
+2: the options are ufe

tests/dollar-dash-expansion/test.sh

@@ -0,0 +1,7 @@
+#!./src/dash
+set -e
+echo "0: the options are $-"
+set -fo debug
+echo "1: the options are $-"
+set +o debug -uo nolog
+echo "2: the options are $-"

tests/echo-backslash-c-spillage/result.txt

@@ -0,0 +1,2 @@
+test\ test
+test\ test

tests/echo-backslash-c-spillage/test.sh

@@ -0,0 +1,4 @@
+#!./src/dash
+echo test\\ test
+echo '\c'
+echo test\\ test

tests/eval-empty/result.txt

@@ -0,0 +1 @@
+OK

tests/eval-empty/test.sh

@@ -0,0 +1,7 @@
+#!./src/dash
+false
+if eval ''; then
+  echo OK
+else
+  echo not ok
+fi

tests/expmeta-nonleading-slash/result.txt

@@ -0,0 +1 @@
+/dev/null

tests/expmeta-nonleading-slash/test.sh

@@ -0,0 +1,2 @@
+#!./src/dash
+echo /*"/null"

tests/expmeta-slash-treatment/result.txt

@@ -0,0 +1 @@
+/root

tests/expmeta-slash-treatment/test.sh

@@ -0,0 +1,2 @@
+#!./src/dash
+echo "/"root*

tests/ifs-after-heredoc/result.txt

@@ -0,0 +1,2 @@
+abcdefghijklmnopqrstuvwxyz
+OK

tests/ifs-after-heredoc/test.sh

@@ -0,0 +1,7 @@
+#!./src/dash
+dash -c '
+cat <<EOF
+$@
+EOF
+echo OK
+' - abcdefghijklmnopqrstuvwxyz

tests/naked-backslash-leakage/result.txt

@@ -0,0 +1 @@
+<bc>

tests/naked-backslash-leakage/test.sh

@@ -0,0 +1,5 @@
+#!./src/dash
+a="\\*bc"
+b="\\"
+c="*"
+echo "<${a##$b"$c"}>"

tests/no-space/result.txt

@@ -0,0 +1,2 @@
+./tests/no-space/test.sh: 2: echo: echo: I/O error
+(exit: 1)

tests/no-space/test.sh

@@ -0,0 +1,2 @@
+#!./src/dash
+echo foo >>/dev/full