Function TestEngineLoadEnvFile

runner/engine_test.go:1782–1833

(t *testing.T)

}

func TestEngineLoadEnvFile(t *testing.T) {
	tmpDir := t.TempDir()
	envPath := filepath.Join(tmpDir, ".env")

	originalValue := "original_global_value"
	t.Setenv("TEST_GLOBAL_VAR", originalValue)

	const initialEnv = `TEST_VAR1=value1
TEST_VAR2=value2
TEST_GLOBAL_VAR=overridden_value
`

	err := os.WriteFile(envPath, []byte(initialEnv), 0o644)
	require.NoError(t, err)

	cfg := defaultConfig()
	cfg.Root = tmpDir
	cfg.EnvFiles = []string{".env"}

	engine, err := NewEngineWithConfig(&cfg, false)
	require.NoError(t, err)

	engine.loadEnvFile()

	assert.Equal(t, "value1", os.Getenv("TEST_VAR1"), "TEST_VAR1 should be set")
	assert.Equal(t, "value2", os.Getenv("TEST_VAR2"), "TEST_VAR2 should be set")
	assert.Equal(t, "original_global_value", os.Getenv("TEST_GLOBAL_VAR"), "TEST_GLOBAL_VAR should NOT be overridden")

	// remove TEST_VAR2
	const updatedEnv = `TEST_VAR1=updated_value1
TEST_GLOBAL_VAR=still_overridden
`
	err = os.WriteFile(envPath, []byte(updatedEnv), 0o644)
	require.NoError(t, err)

	engine.loadEnvFile()

	assert.Equal(t, "updated_value1", os.Getenv("TEST_VAR1"), "TEST_VAR1 should be updated")
	// since TEST_VAR2 only exists in environment thanks to air, it should get unset on removal
	_, exists := os.LookupEnv("TEST_VAR2")
	assert.False(t, exists, "TEST_VAR2 should be unset after removal from .env")
	assert.Equal(t, "original_global_value", os.Getenv("TEST_GLOBAL_VAR"), "TEST_GLOBAL_VAR should NOT be overridden")

	const finalEnv = `TEST_VAR1=final_value`
	err = os.WriteFile(envPath, []byte(finalEnv), 0o644)
	require.NoError(t, err)

	engine.loadEnvFile()

	assert.Equal(t, "final_value", os.Getenv("TEST_VAR1"), "TEST_VAR1 should be final")
	assert.Equal(t, originalValue, os.Getenv("TEST_GLOBAL_VAR"), "TEST_GLOBAL_VAR should be restored to original value")
}