87 lines
2.0 KiB
Go
87 lines
2.0 KiB
Go
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package physical
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import (
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"database/sql"
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"fmt"
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"os"
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"testing"
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_ "github.com/go-sql-driver/mysql"
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)
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func TestMySQLBackend(t *testing.T) {
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address := os.Getenv("MYSQL_ADDR")
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if address == "" {
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t.SkipNow()
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}
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database := os.Getenv("MYSQL_DB")
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if database == "" {
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database = "test"
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}
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table := os.Getenv("MYSQL_TABLE")
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if table == "" {
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table = "test"
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}
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username := os.Getenv("MYSQL_USERNAME")
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password := os.Getenv("MYSQL_PASSWORD")
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// Create MySQL handle for the database.
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db, err := sql.Open("mysql", username+":"+password+"@tcp("+address+")/"+database)
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if err != nil {
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t.Fatalf("Failed to open an handler with database: %v", err)
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}
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defer db.Close()
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// Prepare statement for creating table.
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create_stmt := "CREATE TABLE " + database + "." + table + "(num int, sqr int, PRIMARY KEY (num))"
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stmtCrt, err := db.Prepare(create_stmt)
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if err != nil {
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t.Fatalf("Failed to prepare statement: %v", err)
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}
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defer stmtCrt.Close()
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// Create table
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_, err = stmtCrt.Exec()
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if err != nil {
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t.Fatalf("Failed to create table: %v", err)
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}
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// Prepare statement for inserting data.
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insert_stmt := "INSERT INTO " + database + "." + table + " VALUES( ?, ? ) ON DUPLICATE KEY UPDATE sqr=VALUES(sqr)"
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stmtIns, err := db.Prepare(insert_stmt)
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if err != nil {
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t.Fatalf("Failed to prepare statement: %v", err)
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}
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defer stmtIns.Close()
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// Prepare statement for reading data.
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select_stmt := "SELECT sqr FROM " + database + "." + table + " WHERE num = ?"
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stmtOut, err := db.Prepare(select_stmt)
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if err != nil {
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t.Fatalf("Failed to prepare statement: %v", err)
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}
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defer stmtOut.Close()
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// Insert square numbers for 0-24 in the database
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for i := 0; i < 25; i++ {
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_, err = stmtIns.Exec(i, (i * i)) // Insert tuples (i, i^2)
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if err != nil {
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t.Fatalf("Failed to insert data: %v", err)
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}
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}
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var square int
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// Query the square-number of 13
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err = stmtOut.QueryRow(13).Scan(&square)
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if err != nil {
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t.Fatalf("Failed to query data: %v", err)
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}
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fmt.Printf("The square number of 13 is: %d", square)
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}
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