mirror of
https://github.com/zrepl/zrepl.git
synced 2024-11-28 19:34:58 +01:00
59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
package envconst_test
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
|
|
"github.com/zrepl/zrepl/util/envconst"
|
|
)
|
|
|
|
type ExampleVarType struct{ string }
|
|
|
|
var (
|
|
Var1 = ExampleVarType{"var1"}
|
|
Var2 = ExampleVarType{"var2"}
|
|
)
|
|
|
|
func (m ExampleVarType) String() string { return string(m.string) }
|
|
func (m *ExampleVarType) Set(s string) error {
|
|
switch s {
|
|
case Var1.String():
|
|
*m = Var1
|
|
case Var2.String():
|
|
*m = Var2
|
|
default:
|
|
return fmt.Errorf("unknown var %q", s)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
const EnvVarName = "ZREPL_ENVCONST_UNIT_TEST_VAR"
|
|
|
|
func TestVarDefaultValue(t *testing.T) {
|
|
envconst.Reset()
|
|
_, set := os.LookupEnv(EnvVarName)
|
|
require.False(t, set)
|
|
defer os.Unsetenv(EnvVarName)
|
|
|
|
val := envconst.Var(EnvVarName, &Var1)
|
|
if &Var1 != val {
|
|
t.Errorf("default value should be same address")
|
|
}
|
|
}
|
|
|
|
func TestVarOverriddenValue(t *testing.T) {
|
|
envconst.Reset()
|
|
_, set := os.LookupEnv(EnvVarName)
|
|
require.False(t, set)
|
|
defer os.Unsetenv(EnvVarName)
|
|
|
|
err := os.Setenv(EnvVarName, "var2")
|
|
require.NoError(t, err)
|
|
|
|
val := envconst.Var(EnvVarName, &Var1)
|
|
require.Equal(t, &Var2, val, "only structural identity is required for non-default vars")
|
|
}
|