whatcanGOwrong

go/pkg/mod/github.com/golang-migrate/migrate/v4@v4.17.1/migration_test.go

@@ -0,0 +1,56 @@
+package migrate
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"strings"
+)
+
+func ExampleNewMigration() {
+	// Create a dummy migration body, this is coming from the source usually.
+	body := io.NopCloser(strings.NewReader("dumy migration that creates users table"))
+
+	// Create a new Migration that represents version 1486686016.
+	// Once this migration has been applied to the database, the new
+	// migration version will be 1486689359.
+	migr, err := NewMigration(body, "create_users_table", 1486686016, 1486689359)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Print(migr.LogString())
+	// Output:
+	// 1486686016/u create_users_table
+}
+
+func ExampleNewMigration_nilMigration() {
+	// Create a new Migration that represents a NilMigration.
+	// Once this migration has been applied to the database, the new
+	// migration version will be 1486689359.
+	migr, err := NewMigration(nil, "", 1486686016, 1486689359)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Print(migr.LogString())
+	// Output:
+	// 1486686016/u <empty>
+}
+
+func ExampleNewMigration_nilVersion() {
+	// Create a dummy migration body, this is coming from the source usually.
+	body := io.NopCloser(strings.NewReader("dumy migration that deletes users table"))
+
+	// Create a new Migration that represents version 1486686016.
+	// This is the last available down migration, so the migration version
+	// will be -1, meaning NilVersion once this migration ran.
+	migr, err := NewMigration(body, "drop_users_table", 1486686016, -1)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Print(migr.LogString())
+	// Output:
+	// 1486686016/d drop_users_table
+}