examples: Add missing Close calls (#3828)

* examples: Add missing Close calls

* Update db_test.go

---------

Co-authored-by: Kyle Gray <[email protected]>

Author: alexandear

examples/authors/sqlite/db_test.go

@@ -12,6 +12,7 @@ import (
 
 func TestAuthors(t *testing.T) {
 	sdb, cleanup := sqltest.SQLite(t, []string{"schema.sql"})
+	defer sdb.Close()
 	defer cleanup()
 
 	ctx := context.Background()

examples/booktest/sqlite/db_test.go

@@ -18,6 +18,7 @@ const (
 
 func TestBooks(t *testing.T) {
 	db, cleanup := sqltest.SQLite(t, []string{"schema.sql"})
+	defer db.Close()
 	defer cleanup()
 
 	ctx := context.Background()

examples/ondeck/sqlite/db_test.go

@@ -149,6 +149,7 @@ func TestPrepared(t *testing.T) {
 	t.Parallel()
 
 	sdb, cleanup := sqltest.SQLite(t, []string{"schema"})
+	defer sdb.Close()
 	defer cleanup()
 
 	q, err := Prepare(context.Background(), sdb)
@@ -163,6 +164,7 @@ func TestQueries(t *testing.T) {
 	t.Parallel()
 
 	sdb, cleanup := sqltest.SQLite(t, []string{"schema"})
+	defer sdb.Close()
 	defer cleanup()
 
 	runOnDeckQueries(t, New(sdb))

internal/sqltest/sqlite.go

@@ -16,6 +16,9 @@ func SQLite(t *testing.T, migrations []string) (*sql.DB, func()) {
 	if err != nil {
 		t.Fatal(err)
 	}
+	if err := source.Close(); err != nil {
+		t.Fatal(err)
+	}
 	return CreateSQLiteDatabase(t, source.Name(), migrations)
 }