90 lines
2.4 KiB
Go
90 lines
2.4 KiB
Go
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package postgres
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import (
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"context"
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"math/big"
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"strings"
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"testing"
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"github.com/jackc/pgx/v4/pgxpool"
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"github.com/vulcanize/ipld-ethcl-indexer/pkg/dbtools/sql"
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"github.com/vulcanize/ipld-ethcl-indexer/pkg/testhelpers"
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)
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var (
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pgConfig, _ = MakeConfig(DefaultConfig)
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ctx = context.Background()
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)
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func expectContainsSubstring(t *testing.T, full string, sub string) {
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if !strings.Contains(full, sub) {
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t.Fatalf("Expected \"%v\" to contain substring \"%v\"\n", full, sub)
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}
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}
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func TestPostgresPGX(t *testing.T) {
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t.Run("connects to the sql", func(t *testing.T) {
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dbPool, err := pgxpool.ConnectConfig(context.Background(), pgConfig)
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if err != nil {
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t.Fatalf("failed to connect to db with connection string: %s err: %v", pgConfig.ConnString(), err)
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}
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if dbPool == nil {
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t.Fatal("DB pool is nil")
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}
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dbPool.Close()
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})
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t.Run("serializes big.Int to db", func(t *testing.T) {
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// postgres driver doesn't support go big.Int type
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// various casts in golang uint64, int64, overflow for
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// transaction value (in wei) even though
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// postgres numeric can handle an arbitrary
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// sized int, so use string representation of big.Int
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// and cast on insert
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dbPool, err := pgxpool.ConnectConfig(context.Background(), pgConfig)
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if err != nil {
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t.Fatalf("failed to connect to db with connection string: %s err: %v", pgConfig.ConnString(), err)
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}
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defer dbPool.Close()
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bi := new(big.Int)
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bi.SetString("34940183920000000000", 10)
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testhelpers.ExpectEqual(t, bi.String(), "34940183920000000000")
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defer dbPool.Exec(ctx, `DROP TABLE IF EXISTS example`)
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_, err = dbPool.Exec(ctx, "CREATE TABLE example ( id INTEGER, data NUMERIC )")
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if err != nil {
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t.Fatal(err)
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}
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sqlStatement := `
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INSERT INTO example (id, data)
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VALUES (1, cast($1 AS NUMERIC))`
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_, err = dbPool.Exec(ctx, sqlStatement, bi.String())
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if err != nil {
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t.Fatal(err)
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}
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var data string
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err = dbPool.QueryRow(ctx, `SELECT cast(data AS TEXT) FROM example WHERE id = 1`).Scan(&data)
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if err != nil {
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t.Fatal(err)
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}
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testhelpers.ExpectEqual(t, data, bi.String())
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actual := new(big.Int)
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actual.SetString(data, 10)
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testhelpers.ExpectEqual(t, actual, bi)
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})
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t.Run("throws error when can't connect to the database", func(t *testing.T) {
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_, err := NewPGXDriver(ctx, Config{})
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if err == nil {
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t.Fatal("Expected an error")
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}
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expectContainsSubstring(t, err.Error(), sql.DbConnectionFailedMsg)
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})
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}
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