shell_test.go

package shell

import (
	"reflect"
	"testing"
)

func TestQuote(t *testing.T) {
	tests := []struct {
		in, want string
	}{
		{"", ""},              // nothing to quote
		{"abc", "abc"},        // "
		{"--flag", "--flag"},  // "
		{"'abc", `\'abc`},     // single quote only
		{"abc'", `abc\'`},     // "
		{`shan't`, `shan\'t`}, // "
		{"--flag=value", `'--flag=value'`},
		{"a b\tc", "'a b\tc'"},
		{`a"b"c`, `'a"b"c'`},
		{`'''`, `\'\'\'`},
		{`\`, `'\'`},
		{`'a=b`, `\''a=b'`},   // quotes and other stuff
		{`a='b`, `'a='\''b'`}, // "
		{`a=b'`, `'a=b'\'`},   // "
	}
	for _, test := range tests {
		got := Quote(test.in)
		if got != test.want {
			t.Errorf("Quote %q: got %q, want %q", test.in, got, test.want)
		}
	}
}

func TestRoundTrip(t *testing.T) {
	tests := [][]string{
		nil,
		{"a"},
		{"a", "b", "c"},
		{"a", "b c"},
		{"--flag=value"},
		{"m='$USER'", "nop+", "$$"},
		{`"a" b `, "c"},
		{"a=b", "--foo", "${bar}", `\$`},
		{"cat", "a${b}.txt", "|", "tee", "capture", "2>", "/dev/null"},
	}
	for _, test := range tests {
		s := Join(test)
		t.Logf("Join %#q = %v", test, s)
		if got := Split(s); !reflect.DeepEqual(got, test) {
			t.Errorf("Split %+q: got %q, want %q", s, got, test)
		}
	}
}