oops_test.go

package demo_test

import (
	"testing"

	"github.com/frazercomputing/f4/demo"
)

func TestToUpper(t *testing.T) {
	t.Parallel()
	testcases := map[string]struct {
		input string
		want  string
	}{
		"blank string":  {input: "", want: ""},
		"all lowercase": {input: "hello", want: "HELLO"},
		"mixed case":    {input: "hElLO", want: "HELLO"},
		"all uppercase": {input: "HELLO", want: "HELLO"},
	}

	for name, tc := range testcases {
		t.Run(name, func(t *testing.T) {
			t.Parallel()
			got := demo.ToUpper(tc.input)
			if got != tc.want {
				t.Errorf("demo.ToUpper(%s) = %s, wanted %s", tc.input, got, tc.want)
			}
		})
	}
}