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package sqlr_test
import (
"context"
"database/sql"
"fmt"
"log"
"reflect"
"testing"
"github.com/google/go-cmp/cmp"
_ "github.com/mattn/go-sqlite3"
"roseh.moe/pkg/sqlr"
)
func TestScan(t *testing.T) {
ctx := context.Background()
for _, tc := range []struct {
desc string
db string
query string
want any
}{{
desc: "match field names",
db: `
CREATE TABLE Tbl (ColA, ColB);
INSERT INTO Tbl VALUES (100, "test")`,
query: "SELECT ColA, ColB FROM Tbl",
want: &struct {
ColA int
ColB string
}{100, "test"},
}, {
desc: "select star",
db: `
CREATE TABLE Tbl (ColA, ColB);
INSERT INTO Tbl VALUES (100, "test")`,
query: "SELECT * FROM Tbl",
want: &struct {
ColA int
ColB string
}{100, "test"},
}, {
desc: "ignored field",
db: `
CREATE TABLE Tbl (Col);
INSERT INTO Tbl VALUES (100)`,
query: "SELECT Col FROM Tbl",
want: &struct{ Col, OtherField int }{Col: 100},
}, {
desc: "tag",
db: `
CREATE TABLE Tbl (col_a, col_b);
INSERT INTO Tbl VALUES (100, "test")`,
query: "SELECT col_a, col_b FROM Tbl",
want: &struct {
ColA int `sql:"col_a"`
ColB string `sql:"col_b"`
}{100, "test"},
}, {
desc: "embedded struct",
db: `
CREATE TABLE Tbl (Col);
INSERT INTO Tbl VALUES (100)`,
query: "SELECT Col FROM Tbl",
want: func() any {
type Inner struct{ Col int }
type outer struct{ Inner }
return &outer{Inner{100}}
}(),
}} {
t.Run(tc.desc, func(t *testing.T) {
db, err := sql.Open("sqlite3", ":memory:")
if err != nil {
t.Fatalf("Failed to create in-memory database: %s", err)
}
defer db.Close()
if _, err := db.ExecContext(ctx, tc.db); err != nil {
t.Fatalf("Failed to initialize test database: %s", err)
}
rows, err := db.QueryContext(ctx, tc.query)
if err != nil {
t.Fatalf("Failed to query test database: %s", err)
}
if !rows.Next() {
t.Fatalf("No data")
}
got := reflect.New(reflect.TypeOf(tc.want).Elem()).Interface()
if err := sqlr.Scan(rows, got); err != nil {
t.Fatalf("Scan failed: %s", err)
}
if err := rows.Close(); err != nil {
t.Fatalf("Close rows: %s", err)
}
if err := rows.Err(); err != nil {
t.Fatalf("Database read error: %s", err)
}
if diff := cmp.Diff(tc.want, got); diff != "" {
t.Errorf("Scan returned unexpected diff (-want +got):\n%s", diff)
}
})
}
}
func TestScan_Errors(t *testing.T) {
ctx := context.Background()
for _, tc := range []struct {
desc string
db string
query string
out any
}{{
desc: "wrong type",
db: `
CREATE TABLE Tbl (Col);
INSERT INTO Tbl VALUES (100)`,
query: "SELECT Col FROM Tbl",
out: 5,
}, {
desc: "nil pointer",
db: `
CREATE TABLE Tbl (Col);
INSERT INTO Tbl VALUES (100)`,
query: "SELECT Col FROM Tbl",
out: nil,
}, {
desc: "no field",
db: `
CREATE TABLE Tbl (ColA, ColB);
INSERT INTO Tbl VALUES (100, "test")`,
query: "SELECT ColA, ColB FROM Tbl",
out: new(struct{ ColA int }),
}, {
desc: "ignored field",
db: `
CREATE TABLE Tbl (Col);
INSERT INTO Tbl VALUES (100)`,
query: "SELECT Col FROM Tbl",
out: new(struct {
Col int `sql:"-"`
}),
}, {
desc: "unexported field",
db: `
CREATE TABLE Tbl (col);
INSERT INTO Tbl VALUES (100)`,
query: "SELECT col FROM Tbl",
out: new(struct{ col int }),
}} {
t.Run(tc.desc, func(t *testing.T) {
db, err := sql.Open("sqlite3", ":memory:")
if err != nil {
t.Fatalf("Failed to create in-memory database: %s", err)
}
defer db.Close()
if _, err := db.ExecContext(ctx, tc.db); err != nil {
t.Fatalf("Failed to initialize test database: %s", err)
}
rows, err := db.QueryContext(ctx, tc.query)
if err != nil {
t.Fatalf("Failed to query test database: %s", err)
}
defer rows.Close()
if !rows.Next() {
t.Fatalf("No data")
}
err = sqlr.Scan(rows, tc.out)
if err == nil {
t.Errorf("Scan returned nil, want error")
}
})
}
}
func ExampleQuery() {
ctx := context.Background()
db, err := sql.Open("sqlite3", ":memory:")
if err != nil {
log.Fatalf("Failed to create in-memory database: %s", err)
}
defer db.Close()
if _, err := db.ExecContext(ctx, `
CREATE TABLE Tbl (Name, HighScore);
INSERT INTO Tbl VALUES ("rose", 100)
`); err != nil {
log.Fatalf("Failed to initialize database: %s", err)
}
type row struct {
Name string
HighScore int
}
for row, err := range sqlr.Query[row](ctx, db, "SELECT Name, HighScore FROM Tbl") {
if err != nil {
log.Fatal(err)
}
fmt.Printf("%s %d\n", row.Name, row.HighScore)
}
// Output: rose 100
}
|
