mirror of
https://github.com/ncruces/go-sqlite3.git
synced 2026-01-12 05:59:14 +00:00
80 lines
1.7 KiB
Go
80 lines
1.7 KiB
Go
package stats
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import (
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"math"
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"testing"
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"github.com/ncruces/go-sqlite3"
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_ "github.com/ncruces/go-sqlite3/embed"
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)
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func TestRegister(t *testing.T) {
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t.Parallel()
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db, err := sqlite3.Open(":memory:")
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if err != nil {
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t.Fatal(err)
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}
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defer db.Close()
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Register(db)
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err = db.Exec(`CREATE TABLE IF NOT EXISTS data (col)`)
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if err != nil {
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t.Fatal(err)
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}
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err = db.Exec(`INSERT INTO data (col) VALUES (4), (7.0), ('13'), (NULL), (16)`)
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if err != nil {
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t.Fatal(err)
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}
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stmt, _, err := db.Prepare(`SELECT
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sum(col), avg(col),
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var_samp(col), var_pop(col),
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stddev_samp(col), stddev_pop(col) FROM data`)
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if err != nil {
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t.Fatal(err)
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}
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defer stmt.Close()
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if stmt.Step() {
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if got := stmt.ColumnFloat(0); got != 40 {
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t.Errorf("got %v, want 40", got)
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}
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if got := stmt.ColumnFloat(1); got != 10 {
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t.Errorf("got %v, want 10", got)
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}
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if got := stmt.ColumnFloat(2); got != 30 {
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t.Errorf("got %v, want 30", got)
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}
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if got := stmt.ColumnFloat(3); got != 22.5 {
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t.Errorf("got %v, want 22.5", got)
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}
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if got := stmt.ColumnFloat(4); got != math.Sqrt(30) {
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t.Errorf("got %v, want √30", got)
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}
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if got := stmt.ColumnFloat(5); got != math.Sqrt(22.5) {
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t.Errorf("got %v, want √22.5", got)
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}
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}
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{
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stmt, _, err := db.Prepare(`SELECT var_samp(col) OVER (ROWS 1 PRECEDING) FROM data`)
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if err != nil {
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t.Fatal(err)
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}
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defer stmt.Close()
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want := [...]float64{0, 4.5, 18, 0, 0}
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for i := 0; stmt.Step(); i++ {
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if got := stmt.ColumnFloat(0); got != want[i] {
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t.Errorf("got %v, want %v", got, want[i])
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}
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if got := stmt.ColumnType(0); (got == sqlite3.FLOAT) != (want[i] != 0) {
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t.Errorf("got %v, want %v", got, want[i])
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}
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}
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}
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}
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