Function TestExpand

eval_test.go:8–220

test cases sourced from tldp.org http://www.tldp.org/LDP/abs/html/parameter-substitution.html

(t *testing.T)

// http://www.tldp.org/LDP/abs/html/parameter-substitution.html

func TestExpand(t *testing.T) {
	var expressions = []struct {
		params map[string]string
		input  string
		output string
	}{
		// text-only
		{
			params: map[string]string{},
			input:  "abcdEFGH28ij",
			output: "abcdEFGH28ij",
		},
		// length
		{
			params: map[string]string{"var01": "abcdEFGH28ij"},
			input:  "${#var01}",
			output: "12",
		},
		// uppercase first
		{
			params: map[string]string{"var01": "abcdEFGH28ij"},
			input:  "${var01^}",
			output: "AbcdEFGH28ij",
		},
		// uppercase
		{
			params: map[string]string{"var01": "abcdEFGH28ij"},
			input:  "${var01^^}",
			output: "ABCDEFGH28IJ",
		},
		// lowercase first
		{
			params: map[string]string{"var01": "ABCDEFGH28IJ"},
			input:  "${var01,}",
			output: "aBCDEFGH28IJ",
		},
		// lowercase
		{
			params: map[string]string{"var01": "ABCDEFGH28IJ"},
			input:  "${var01,,}",
			output: "abcdefgh28ij",
		},
		// substring with position
		{
			params: map[string]string{"path_name": "/home/bozo/ideas/thoughts.for.today"},
			input:  "${path_name:11}",
			output: "ideas/thoughts.for.today",
		},
		// substring with position and length
		{
			params: map[string]string{"path_name": "/home/bozo/ideas/thoughts.for.today"},
			input:  "${path_name:11:5}",
			output: "ideas",
		},
		// default not used
		{
			params: map[string]string{"var": "abc"},
			input:  "${var=xyz}",