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tests: enable configuring an external database for tests #1127

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merged 2 commits into from
Oct 6, 2023
Merged

tests: enable configuring an external database for tests #1127

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5ed54b1
tests: enable configuring an external database for tests
rdimitrov Oct 6, 2023
b07cea0
chore: add separate port for in-process test db
rdimitrov Oct 6, 2023
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34 changes: 32 additions & 2 deletions internal/db/main_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -33,14 +33,39 @@ import (
_ "github.com/lib/pq"
)

const (
// UseExternalDBEnvVar is the environment variable that, when set, will
// enable using an external postgres database instead of the in-process one.
// Useful for debugging.
UseExternalDBEnvVar = "MEDIATOR_TEST_EXTERNAL_DB"
)

var testQueries *Queries
var testDB *sql.DB

func TestMain(m *testing.M) {
os.Exit(runTestWithPostgres(m))
var runDBTests = runTestWithInProcessPostgres
if useExternalDB() {
log.Println("Using external database for tests")
runDBTests = runTestWithExternalPostgres
}
os.Exit(runDBTests(m))
}

func runTestWithExternalPostgres(m *testing.M) int {
connStr := "user=postgres dbname=mediator password=postgres host=localhost sslmode=disable"

testDB, err := sql.Open("postgres", connStr)
if err != nil {
log.Fatal("cannot connect to db test instance:", err)
}

testQueries = New(testDB)

return m.Run()
}

func runTestWithPostgres(m *testing.M) int {
func runTestWithInProcessPostgres(m *testing.M) int {
tmpName, err := os.MkdirTemp("", "mediator-db-test")
if err != nil {
log.Println("cannot create tmpdir:", err)
Expand Down Expand Up @@ -97,3 +122,8 @@ func runTestWithPostgres(m *testing.M) int {
// Run tests
return m.Run()
}

func useExternalDB() bool {
_, ok := os.LookupEnv(UseExternalDBEnvVar)
return ok
}