package rconfig

import (
	"testing"
)

func TestDeriveEnvVarName(t *testing.T) {
	for test, expect := range map[string]string{
		"1Foobar":              "1_FOOBAR",
		"BC1":                  "BC1",
		"BIGCase1":             "BIG_CASE1",
		"BIGCase":              "BIG_CASE",
		"Camel1":               "CAMEL1",
		"camel":                "CAMEL",
		"Camel":                "CAMEL",
		"CAMEL":                "CAMEL",
		"CamelCase":            "CAMEL_CASE",
		"_foobar":              "FOOBAR",
		"ILoveGoAndJSONSoMuch": "I_LOVE_GO_AND_JSON_SO_MUCH",
		"mrT":         "MR_T",
		"my_case1":    "MY_CASE1",
		"MyFieldName": "MY_FIELD_NAME",
		"SmallCASE":   "SMALL_CASE",
	} {
		if d := deriveEnvVarName(test); d != expect {
			t.Errorf("Derived variable %q did not match expectation %q", d, expect)
		}
	}
}