Files
webhooker/internal/config/sentry_test.go
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Fail loudly on an unparseable SENTRY_DSN and a malformed .env (closes #283)
2026-08-24 04:25:29 +02:00

142 lines
3.7 KiB
Go

package config_test
import (
"os"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"sneak.berlin/go/webhooker/internal/config"
)
// envKeySentryDSN is the variable envSentryDSN reads in production.
const envKeySentryDSN = "SENTRY_DSN"
// validSentryDSN is a syntactically complete DSN. The host is under
// .invalid (RFC 2606), so nothing a test builds around it can reach a
// real Sentry installation.
const validSentryDSN = "https://abc123@sentry.invalid/42"
// envSentryDSNCase is one row of the envSentryDSN table.
type envSentryDSNCase struct {
name string
set bool
value string
expectError bool
expected string
}
// envSentryDSNCases is the envSentryDSN table. The three invalid
// values are the ones measured on the defect: each initialised the SDK
// with an error and left the process serving with reporting off.
func envSentryDSNCases() []envSentryDSNCase {
return []envSentryDSNCase{
{
name: "unset means reporting off",
expected: "",
},
{
name: "empty means reporting off",
set: true,
value: "",
expected: "",
},
{
name: "whitespace means reporting off",
set: true,
value: " ",
expected: "",
},
{
name: "a valid DSN is kept",
set: true,
value: validSentryDSN,
expected: validSentryDSN,
},
{
name: "surrounding whitespace is trimmed",
set: true,
value: " " + validSentryDSN + "\t",
expected: validSentryDSN,
},
{
name: "a value that is not a URL is rejected",
set: true,
value: "not-a-dsn",
expectError: true,
},
{
name: "an unparseable URL is rejected",
set: true,
value: "%%%",
expectError: true,
},
{
name: "a DSN without a public key is rejected",
set: true,
value: "https://example.invalid/1",
expectError: true,
},
{
name: "a DSN without a project id is rejected",
set: true,
value: "https://abc123@sentry.invalid/",
expectError: true,
},
{
name: "a non-HTTP scheme is rejected",
set: true,
value: "ftp://abc123@sentry.invalid/42",
expectError: true,
},
}
}
// TestEnvSentryDSN covers the helper directly. What it pins beyond the
// value is the failure shape: a set-but-unparseable DSN names the
// variable and the value, exactly as the other fail-loud helpers do,
// so an operator reads the fix off the message.
func TestEnvSentryDSN(t *testing.T) {
for _, tt := range envSentryDSNCases() {
t.Run(tt.name, func(t *testing.T) {
// Cannot use t.Parallel() here because t.Setenv
// is incompatible with parallel subtests.
if tt.set {
t.Setenv(envKeySentryDSN, tt.value)
} else {
require.NoError(t, os.Unsetenv(envKeySentryDSN))
}
got, err := config.EnvSentryDSNForTest(envKeySentryDSN)
if tt.expectError {
require.Error(t, err)
require.ErrorIs(t, err, config.ErrInvalidSentryDSN)
assert.Contains(t, err.Error(), envKeySentryDSN)
assert.Contains(t, err.Error(), tt.value)
assert.Empty(t, got)
return
}
require.NoError(t, err)
assert.Equal(t, tt.expected, got)
})
}
}
// TestSentryEnabled_TracksTheDSN pins that the one method answering
// "is anything being reported" agrees with the DSN in every state. The
// startup log, the SDK initialisation and the sentryhttp middleware
// all read it, so a log field cannot report reporting as on while
// nothing is sending.
func TestSentryEnabled_TracksTheDSN(t *testing.T) {
t.Parallel()
assert.False(t, (&config.Config{}).SentryEnabled())
assert.True(
t,
(&config.Config{SentryDSN: validSentryDSN}).SentryEnabled(),
)
}