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package opts
import (
"testing"
"gotest.tools/v3/assert"
"gotest.tools/v3/env"
"gotest.tools/v3/fs"
)
func TestReadKVEnvStrings(t *testing.T) {
emptyEnvFile := fs.NewFile(t, t.Name())
defer emptyEnvFile.Remove()
// EMPTY_VAR should be set, but with an empty string as value
// FROM_ENV value should be substituted with FROM_ENV in the current environment
// NO_SUCH_ENV does not exist in the current environment, so should be omitted
envFile1 := fs.NewFile(t, t.Name(), fs.WithContent(`Z1=z
EMPTY_VAR=
FROM_ENV
NO_SUCH_ENV
`))
defer envFile1.Remove()
envFile2 := fs.NewFile(t, t.Name(), fs.WithContent("Z2=z\nA2=a"))
defer envFile2.Remove()
defer env.Patch(t, "FROM_ENV", "from-env")()
tests := []struct {
name string
files []string
overrides []string
expected []string
}{
{
name: "empty",
},
{
name: "empty file",
files: []string{emptyEnvFile.Path()},
},
{
name: "single file",
files: []string{envFile1.Path()},
expected: []string{"Z1=z", "EMPTY_VAR=", "FROM_ENV=from-env"},
},
{
name: "two files",
files: []string{envFile1.Path(), envFile2.Path()},
expected: []string{"Z1=z", "EMPTY_VAR=", "FROM_ENV=from-env", "Z2=z", "A2=a"},
},
{
name: "single file and override",
files: []string{envFile1.Path()},
overrides: []string{"Z1=override", "EXTRA=extra"},
expected: []string{"Z1=z", "EMPTY_VAR=", "FROM_ENV=from-env", "Z1=override", "EXTRA=extra"},
},
{
name: "overrides only",
overrides: []string{"Z1=z", "EMPTY_VAR="},
expected: []string{"Z1=z", "EMPTY_VAR="},
},
}
for _, tc := range tests {
tc := tc
t.Run(tc.name, func(t *testing.T) {
envs, err := ReadKVEnvStrings(tc.files, tc.overrides)
assert.NilError(t, err)
assert.DeepEqual(t, tc.expected, envs)
})
}
}
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