package button

import (
	"testing"
)

func TestV01TransformationPipe(t *testing.T) {
	cases := map[string]struct {
		input string
		xform map[string]string
		want  string
	}{
		"empty input": {
			xform: map[string]string{"a": "bc"},
		},
		"empty xform": {
			input: "aa",
			want:  "aa",
		},
		"all": {
			input: "aa",
			xform: map[string]string{"a": "cc"},
			want:  "cc",
		},
		"last": {
			input: "ba",
			xform: map[string]string{"a": "cc"},
			want:  "bc",
		},
		"first": {
			input: "ab",
			xform: map[string]string{"a": "cc"},
			want:  "cb",
		},
		"noop": {
			input: "bb",
			xform: map[string]string{"a": "bc"},
			want:  "bb",
		},
	}

	for name, d := range cases {
		c := d
		t.Run(name, func(t *testing.T) {
			got := v01Transformation(c.xform).pipe(c.input)
			if got != c.want {
				t.Errorf("%+v(%s) want %s got %s", c.xform, c.input, c.want, got)
			}
		})
	}
}