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The config tests unset variables without restoring them and read whatever the developer's shell exported, so results could differ from one machine to the next. config.ClearEnvForTest, in internal/config/testing.go, unsets every variable in the process environment and, when the test ends, leaves it exactly as it found it; every config test and the first-boot test call it before setting their own. TestEnvPositiveInt and TestEnvPort share one table runner, and the port errors name the bad value. A PORT of zero, below zero, or too large to parse now matches ErrInvalidPort, as one above 65535 already did. The README and the Settings page say an unparseable or non-positive RETENTION_SWEEP_INTERVAL stops startup. Model: opus-5-5
51 lines
1.2 KiB
Go
51 lines
1.2 KiB
Go
package config
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import (
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"os"
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"strings"
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"testing"
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)
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// ClearEnvForTest unsets every variable in the process environment
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// for the rest of the test, so a test sees only the variables it sets
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// itself, not whatever the developer's shell exports. When the test
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// ends it leaves the environment exactly as it found it: each variable
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// it unset is put back, and any variable added since is removed.
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func ClearEnvForTest(t *testing.T) {
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t.Helper()
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present := make(map[string]bool)
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for _, entry := range os.Environ() {
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key, _, _ := strings.Cut(entry, "=")
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present[key] = true
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// t.Setenv registers the restore; the Unsetenv after it is
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// what makes the key absent, since a key set to the empty
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// string is still present, and godotenv will not overwrite a
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// present key.
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t.Setenv(key, "")
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err := os.Unsetenv(key)
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if err != nil {
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t.Fatalf("unsetting %s: %v", key, err)
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}
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}
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// A variable the test adds other than through t.Setenv, as loading
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// a .env file does, has no restore of its own.
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t.Cleanup(func() {
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for _, entry := range os.Environ() {
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key, _, _ := strings.Cut(entry, "=")
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if present[key] {
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continue
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}
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err := os.Unsetenv(key)
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if err != nil {
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t.Errorf("unsetting %s: %v", key, err)
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}
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}
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})
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}
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