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