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sqlmock_test.go
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sqlmock_test.go
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package sqlmock
import (
"database/sql"
"fmt"
"sync"
"testing"
"time"
)
func cancelOrder(db *sql.DB, orderID int) error {
tx, _ := db.Begin()
_, _ = tx.Query("SELECT * FROM orders {0} FOR UPDATE", orderID)
_ = tx.Rollback()
return nil
}
func Example() {
// Open new mock database
db, mock, err := New()
if err != nil {
fmt.Println("error creating mock database")
return
}
// columns to be used for result
columns := []string{"id", "status"}
// expect transaction begin
mock.ExpectBegin()
// expect query to fetch order, match it with regexp
mock.ExpectQuery("SELECT (.+) FROM orders (.+) FOR UPDATE").
WithArgs(1).
WillReturnRows(NewRows(columns).AddRow(1, 1))
// expect transaction rollback, since order status is "cancelled"
mock.ExpectRollback()
// run the cancel order function
someOrderID := 1
// call a function which executes expected database operations
err = cancelOrder(db, someOrderID)
if err != nil {
fmt.Printf("unexpected error: %s", err)
return
}
// ensure all expectations have been met
if err = mock.ExpectationsWereMet(); err != nil {
fmt.Printf("unmet expectation error: %s", err)
}
// Output:
}
func TestIssue14EscapeSQL(t *testing.T) {
t.Parallel()
db, mock, err := New()
if err != nil {
t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
}
defer db.Close()
mock.ExpectExec("INSERT INTO mytable\\(a, b\\)").
WithArgs("A", "B").
WillReturnResult(NewResult(1, 1))
_, err = db.Exec("INSERT INTO mytable(a, b) VALUES (?, ?)", "A", "B")
if err != nil {
t.Errorf("error '%s' was not expected, while inserting a row", err)
}
if err := mock.ExpectationsWereMet(); err != nil {
t.Errorf("there were unfulfilled expections: %s", err)
}
}
// test the case when db is not triggered and expectations
// are not asserted on close
func TestIssue4(t *testing.T) {
t.Parallel()
db, mock, err := New()
if err != nil {
t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
}
defer db.Close()
mock.ExpectQuery("some sql query which will not be called").
WillReturnRows(NewRows([]string{"id"}))
if err := mock.ExpectationsWereMet(); err == nil {
t.Errorf("was expecting an error since query was not triggered")
}
}
func TestMockQuery(t *testing.T) {
t.Parallel()
db, mock, err := New()
if err != nil {
t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
}
defer db.Close()
rs := NewRows([]string{"id", "title"}).FromCSVString("5,hello world")
mock.ExpectQuery("SELECT (.+) FROM articles WHERE id = ?").
WithArgs(5).
WillReturnRows(rs)
rows, err := db.Query("SELECT (.+) FROM articles WHERE id = ?", 5)
if err != nil {
t.Errorf("error '%s' was not expected while retrieving mock rows", err)
}
defer func() {
if er := rows.Close(); er != nil {
t.Error("Unexpected error while trying to close rows")
}
}()
if !rows.Next() {
t.Error("it must have had one row as result, but got empty result set instead")
}
var id int
var title string
err = rows.Scan(&id, &title)
if err != nil {
t.Errorf("error '%s' was not expected while trying to scan row", err)
}
if id != 5 {
t.Errorf("expected mocked id to be 5, but got %d instead", id)
}
if title != "hello world" {
t.Errorf("expected mocked title to be 'hello world', but got '%s' instead", title)
}
if err := mock.ExpectationsWereMet(); err != nil {
t.Errorf("there were unfulfilled expections: %s", err)
}
}
func TestMockQueryTypes(t *testing.T) {
t.Parallel()
db, mock, err := New()
if err != nil {
t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
}
defer db.Close()
columns := []string{"id", "timestamp", "sold"}
timestamp := time.Now()
rs := NewRows(columns)
rs.AddRow(5, timestamp, true)
mock.ExpectQuery("SELECT (.+) FROM sales WHERE id = ?").
WithArgs(5).
WillReturnRows(rs)
rows, err := db.Query("SELECT (.+) FROM sales WHERE id = ?", 5)
if err != nil {
t.Errorf("error '%s' was not expected while retrieving mock rows", err)
}
defer func() {
if er := rows.Close(); er != nil {
t.Error("Unexpected error while trying to close rows")
}
}()
if !rows.Next() {
t.Error("it must have had one row as result, but got empty result set instead")
}
var id int
var time time.Time
var sold bool
err = rows.Scan(&id, &time, &sold)
if err != nil {
t.Errorf("error '%s' was not expected while trying to scan row", err)
}
if id != 5 {
t.Errorf("expected mocked id to be 5, but got %d instead", id)
}
if time != timestamp {
t.Errorf("expected mocked time to be %s, but got '%s' instead", timestamp, time)
}
if sold != true {
t.Errorf("expected mocked boolean to be true, but got %v instead", sold)
}
if err := mock.ExpectationsWereMet(); err != nil {
t.Errorf("there were unfulfilled expections: %s", err)
}
}
func TestTransactionExpectations(t *testing.T) {
t.Parallel()
db, mock, err := New()
if err != nil {
t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
}
defer db.Close()
// begin and commit
mock.ExpectBegin()
mock.ExpectCommit()
tx, err := db.Begin()
if err != nil {
t.Errorf("an error '%s' was not expected when beginning a transaction", err)
}
err = tx.Commit()
if err != nil {
t.Errorf("an error '%s' was not expected when commiting a transaction", err)
}
// begin and rollback
mock.ExpectBegin()
mock.ExpectRollback()
tx, err = db.Begin()
if err != nil {
t.Errorf("an error '%s' was not expected when beginning a transaction", err)
}
err = tx.Rollback()
if err != nil {
t.Errorf("an error '%s' was not expected when rolling back a transaction", err)
}
// begin with an error
mock.ExpectBegin().WillReturnError(fmt.Errorf("some err"))
tx, err = db.Begin()
if err == nil {
t.Error("an error was expected when beginning a transaction, but got none")
}
if err := mock.ExpectationsWereMet(); err != nil {
t.Errorf("there were unfulfilled expections: %s", err)
}
}
func TestPrepareExpectations(t *testing.T) {
t.Parallel()
db, mock, err := New()
if err != nil {
t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
}
defer db.Close()
mock.ExpectPrepare("SELECT (.+) FROM articles WHERE id = ?")
stmt, err := db.Prepare("SELECT (.+) FROM articles WHERE id = ?")
if err != nil {
t.Errorf("error '%s' was not expected while creating a prepared statement", err)
}
if stmt == nil {
t.Errorf("stmt was expected while creating a prepared statement")
}
// expect something else, w/o ExpectPrepare()
var id int
var title string
rs := NewRows([]string{"id", "title"}).FromCSVString("5,hello world")
mock.ExpectQuery("SELECT (.+) FROM articles WHERE id = ?").
WithArgs(5).
WillReturnRows(rs)
err = stmt.QueryRow(5).Scan(&id, &title)
if err != nil {
t.Errorf("error '%s' was not expected while retrieving mock rows", err)
}
mock.ExpectPrepare("SELECT (.+) FROM articles WHERE id = ?").
WillReturnError(fmt.Errorf("Some DB error occurred"))
stmt, err = db.Prepare("SELECT id FROM articles WHERE id = ?")
if err == nil {
t.Error("error was expected while creating a prepared statement")
}
if stmt != nil {
t.Errorf("stmt was not expected while creating a prepared statement returning error")
}
if err := mock.ExpectationsWereMet(); err != nil {
t.Errorf("there were unfulfilled expections: %s", err)
}
}
func TestPreparedQueryExecutions(t *testing.T) {
t.Parallel()
db, mock, err := New()
if err != nil {
t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
}
defer db.Close()
mock.ExpectPrepare("SELECT (.+) FROM articles WHERE id = ?")
rs1 := NewRows([]string{"id", "title"}).FromCSVString("5,hello world")
mock.ExpectQuery("SELECT (.+) FROM articles WHERE id = ?").
WithArgs(5).
WillReturnRows(rs1)
rs2 := NewRows([]string{"id", "title"}).FromCSVString("2,whoop")
mock.ExpectQuery("SELECT (.+) FROM articles WHERE id = ?").
WithArgs(2).
WillReturnRows(rs2)
stmt, err := db.Prepare("SELECT id, title FROM articles WHERE id = ?")
if err != nil {
t.Errorf("error '%s' was not expected while creating a prepared statement", err)
}
var id int
var title string
err = stmt.QueryRow(5).Scan(&id, &title)
if err != nil {
t.Errorf("error '%s' was not expected querying row from statement and scanning", err)
}
if id != 5 {
t.Errorf("expected mocked id to be 5, but got %d instead", id)
}
if title != "hello world" {
t.Errorf("expected mocked title to be 'hello world', but got '%s' instead", title)
}
err = stmt.QueryRow(2).Scan(&id, &title)
if err != nil {
t.Errorf("error '%s' was not expected querying row from statement and scanning", err)
}
if id != 2 {
t.Errorf("expected mocked id to be 2, but got %d instead", id)
}
if title != "whoop" {
t.Errorf("expected mocked title to be 'whoop', but got '%s' instead", title)
}
if err := mock.ExpectationsWereMet(); err != nil {
t.Errorf("there were unfulfilled expections: %s", err)
}
}
func TestUnexpectedOperations(t *testing.T) {
t.Parallel()
db, mock, err := New()
if err != nil {
t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
}
defer db.Close()
mock.ExpectPrepare("SELECT (.+) FROM articles WHERE id = ?")
stmt, err := db.Prepare("SELECT id, title FROM articles WHERE id = ?")
if err != nil {
t.Errorf("error '%s' was not expected while creating a prepared statement", err)
}
var id int
var title string
err = stmt.QueryRow(5).Scan(&id, &title)
if err == nil {
t.Error("error was expected querying row, since there was no such expectation")
}
mock.ExpectRollback()
if err := mock.ExpectationsWereMet(); err == nil {
t.Errorf("was expecting an error since query was not triggered")
}
}
func TestWrongExpectations(t *testing.T) {
t.Parallel()
db, mock, err := New()
if err != nil {
t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
}
defer db.Close()
mock.ExpectBegin()
rs1 := NewRows([]string{"id", "title"}).FromCSVString("5,hello world")
mock.ExpectQuery("SELECT (.+) FROM articles WHERE id = ?").
WithArgs(5).
WillReturnRows(rs1)
mock.ExpectCommit().WillReturnError(fmt.Errorf("deadlock occured"))
mock.ExpectRollback() // won't be triggered
var id int
var title string
err = db.QueryRow("SELECT id, title FROM articles WHERE id = ? FOR UPDATE", 5).Scan(&id, &title)
if err == nil {
t.Error("error was expected while querying row, since there begin transaction expectation is not fulfilled")
}
// lets go around and start transaction
tx, err := db.Begin()
if err != nil {
t.Errorf("an error '%s' was not expected when beginning a transaction", err)
}
err = db.QueryRow("SELECT id, title FROM articles WHERE id = ? FOR UPDATE", 5).Scan(&id, &title)
if err != nil {
t.Errorf("error '%s' was not expected while querying row, since transaction was started", err)
}
err = tx.Commit()
if err == nil {
t.Error("a deadlock error was expected when commiting a transaction", err)
}
if err := mock.ExpectationsWereMet(); err == nil {
t.Errorf("was expecting an error since query was not triggered")
}
}
func TestExecExpectations(t *testing.T) {
t.Parallel()
db, mock, err := New()
if err != nil {
t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
}
defer db.Close()
result := NewResult(1, 1)
mock.ExpectExec("^INSERT INTO articles").
WithArgs("hello").
WillReturnResult(result)
res, err := db.Exec("INSERT INTO articles (title) VALUES (?)", "hello")
if err != nil {
t.Errorf("error '%s' was not expected, while inserting a row", err)
}
id, err := res.LastInsertId()
if err != nil {
t.Errorf("error '%s' was not expected, while getting a last insert id", err)
}
affected, err := res.RowsAffected()
if err != nil {
t.Errorf("error '%s' was not expected, while getting affected rows", err)
}
if id != 1 {
t.Errorf("expected last insert id to be 1, but got %d instead", id)
}
if affected != 1 {
t.Errorf("expected affected rows to be 1, but got %d instead", affected)
}
if err := mock.ExpectationsWereMet(); err != nil {
t.Errorf("there were unfulfilled expections: %s", err)
}
}
func TestRowBuilderAndNilTypes(t *testing.T) {
t.Parallel()
db, mock, err := New()
if err != nil {
t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
}
defer db.Close()
rs := NewRows([]string{"id", "active", "created", "status"}).
AddRow(1, true, time.Now(), 5).
AddRow(2, false, nil, nil)
mock.ExpectQuery("SELECT (.+) FROM sales").WillReturnRows(rs)
rows, err := db.Query("SELECT * FROM sales")
if err != nil {
t.Errorf("error '%s' was not expected while retrieving mock rows", err)
}
defer func() {
if er := rows.Close(); er != nil {
t.Error("Unexpected error while trying to close rows")
}
}()
// NullTime and NullInt are used from stubs_test.go
var (
id int
active bool
created NullTime
status NullInt
)
if !rows.Next() {
t.Error("it must have had row in rows, but got empty result set instead")
}
err = rows.Scan(&id, &active, &created, &status)
if err != nil {
t.Errorf("error '%s' was not expected while trying to scan row", err)
}
if id != 1 {
t.Errorf("expected mocked id to be 1, but got %d instead", id)
}
if !active {
t.Errorf("expected 'active' to be 'true', but got '%v' instead", active)
}
if !created.Valid {
t.Errorf("expected 'created' to be valid, but it %+v is not", created)
}
if !status.Valid {
t.Errorf("expected 'status' to be valid, but it %+v is not", status)
}
if status.Integer != 5 {
t.Errorf("expected 'status' to be '5', but got '%d'", status.Integer)
}
// test second row
if !rows.Next() {
t.Error("it must have had row in rows, but got empty result set instead")
}
err = rows.Scan(&id, &active, &created, &status)
if err != nil {
t.Errorf("error '%s' was not expected while trying to scan row", err)
}
if id != 2 {
t.Errorf("expected mocked id to be 2, but got %d instead", id)
}
if active {
t.Errorf("expected 'active' to be 'false', but got '%v' instead", active)
}
if created.Valid {
t.Errorf("expected 'created' to be invalid, but it %+v is not", created)
}
if status.Valid {
t.Errorf("expected 'status' to be invalid, but it %+v is not", status)
}
if err := mock.ExpectationsWereMet(); err != nil {
t.Errorf("there were unfulfilled expections: %s", err)
}
}
func TestArgumentReflectValueTypeError(t *testing.T) {
t.Parallel()
db, mock, err := New()
if err != nil {
t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
}
defer db.Close()
rs := NewRows([]string{"id"}).AddRow(1)
mock.ExpectQuery("SELECT (.+) FROM sales").WithArgs(5.5).WillReturnRows(rs)
_, err = db.Query("SELECT * FROM sales WHERE x = ?", 5)
if err == nil {
t.Error("Expected error, but got none")
}
}
func TestGoroutineExecutionWithUnorderedExpectationMatching(t *testing.T) {
t.Parallel()
db, mock, err := New()
if err != nil {
t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
}
defer db.Close()
// note this line is important for unordered expectation matching
mock.MatchExpectationsInOrder(false)
result := NewResult(1, 1)
mock.ExpectExec("^UPDATE one").WithArgs("one").WillReturnResult(result)
mock.ExpectExec("^UPDATE two").WithArgs("one", "two").WillReturnResult(result)
mock.ExpectExec("^UPDATE three").WithArgs("one", "two", "three").WillReturnResult(result)
var wg sync.WaitGroup
queries := map[string][]interface{}{
"one": []interface{}{"one"},
"two": []interface{}{"one", "two"},
"three": []interface{}{"one", "two", "three"},
}
wg.Add(len(queries))
for table, args := range queries {
go func(tbl string, a []interface{}) {
if _, err := db.Exec("UPDATE "+tbl, a...); err != nil {
t.Errorf("error was not expected: %s", err)
}
wg.Done()
}(table, args)
}
wg.Wait()
if err := mock.ExpectationsWereMet(); err != nil {
t.Errorf("there were unfulfilled expections: %s", err)
}
}
func ExampleSqlmock_goroutines() {
db, mock, err := New()
if err != nil {
fmt.Println("failed to open sqlmock database:", err)
}
defer db.Close()
// note this line is important for unordered expectation matching
mock.MatchExpectationsInOrder(false)
result := NewResult(1, 1)
mock.ExpectExec("^UPDATE one").WithArgs("one").WillReturnResult(result)
mock.ExpectExec("^UPDATE two").WithArgs("one", "two").WillReturnResult(result)
mock.ExpectExec("^UPDATE three").WithArgs("one", "two", "three").WillReturnResult(result)
var wg sync.WaitGroup
queries := map[string][]interface{}{
"one": []interface{}{"one"},
"two": []interface{}{"one", "two"},
"three": []interface{}{"one", "two", "three"},
}
wg.Add(len(queries))
for table, args := range queries {
go func(tbl string, a []interface{}) {
if _, err := db.Exec("UPDATE "+tbl, a...); err != nil {
fmt.Println("error was not expected:", err)
}
wg.Done()
}(table, args)
}
wg.Wait()
if err := mock.ExpectationsWereMet(); err != nil {
fmt.Println("there were unfulfilled expections:", err)
}
// Output:
}