diff --git a/example_helpers_test.go b/example_helpers_test.go new file mode 100644 index 0000000..0aeecd1 --- /dev/null +++ b/example_helpers_test.go @@ -0,0 +1,34 @@ +package testdb_test + +import ( + "context" + "fmt" + "testing" +) + +// exampleT stands in for the *testing.T a runnable example does not have; +// see postgres/example_helpers_test.go for the full story. The examples +// here close their databases by hand, but a real stand-in keeps them honest +// about what they call on t. +type exampleT struct { + testing.TB + cleanups []func() +} + +func newExampleT() *exampleT { return &exampleT{} } + +func (t *exampleT) Helper() {} +func (t *exampleT) Cleanup(f func()) { t.cleanups = append(t.cleanups, f) } +func (t *exampleT) Context() context.Context { return context.Background() } +func (t *exampleT) Failed() bool { return false } +func (t *exampleT) Logf(string, ...any) {} + +func (t *exampleT) Errorf(format string, args ...any) { fmt.Printf("error: "+format+"\n", args...) } +func (t *exampleT) Fatalf(format string, args ...any) { panic(fmt.Sprintf(format, args...)) } +func (t *exampleT) Fatal(args ...any) { panic(fmt.Sprint(args...)) } + +func (t *exampleT) done() { + for i := len(t.cleanups) - 1; i >= 0; i-- { + t.cleanups[i]() + } +} diff --git a/example_test.go b/example_test.go index e2a328a..e7b0dbe 100644 --- a/example_test.go +++ b/example_test.go @@ -3,7 +3,6 @@ package testdb_test import ( "context" "fmt" - "testing" "github.com/bashhack/testdb" "github.com/bashhack/testdb/postgres" @@ -12,7 +11,8 @@ import ( // Example_new demonstrates using testdb.New with a custom initializer // for full control over database initialization. func Example_new() { - t := &testing.T{} + t := newExampleT() + defer t.done() provider := &postgres.PostgresProvider{} initializer := &postgres.PoolInitializer{} @@ -48,7 +48,8 @@ func Example_new() { // Example_dsnOnly demonstrates using testdb to get just a DSN // without automatic connection initialization. func Example_dsnOnly() { - t := &testing.T{} + t := newExampleT() + defer t.done() provider := &postgres.PostgresProvider{} @@ -78,7 +79,8 @@ func Example_dsnOnly() { // Example_customInitializer shows implementing a custom initializer // for integration with ORMs or custom database types. func Example_customInitializer() { - t := &testing.T{} + t := newExampleT() + defer t.done() provider := &postgres.PostgresProvider{} initializer := &exampleInitializer{} diff --git a/go.work.sum b/go.work.sum index 43105c9..275cf34 100644 --- a/go.work.sum +++ b/go.work.sum @@ -1,32 +1,224 @@ -filippo.io/edwards25519 v1.2.0 h1:crnVqOiS4jqYleHd9vaKZ+HKtHfllngJIiOpNpoJsjo= -filippo.io/edwards25519 v1.2.0/go.mod h1:xzAOLCNug/yB62zG1bQ8uziwrIqIuxhctzJT18Q77mc= +cel.dev/expr v0.25.2/go.mod h1:hrXvqGP6G6gyx8UAHSHJ5RGk//1Oj5nXQ2NI02Nrsg4= +cloud.google.com/go v0.123.0/go.mod h1:xBoMV08QcqUGuPW65Qfm1o9Y4zKZBpGS+7bImXLTAZU= +cloud.google.com/go/auth v0.20.0/go.mod h1:942/yi/itH1SsmpyrbnTMDgGfdy2BUqIKyd0cyYLc5Q= +cloud.google.com/go/auth/oauth2adapt v0.2.8/go.mod h1:XQ9y31RkqZCcwJWNSx2Xvric3RrU88hAYYbjDWYDL+c= +cloud.google.com/go/compute/metadata v0.9.0/go.mod h1:E0bWwX5wTnLPedCKqk3pJmVgCBSM6qQI1yTBdEb3C10= +cloud.google.com/go/iam v1.11.0/go.mod h1:KP+nKGugNJW4LcLx1uEZcq1ok5sQHFaQehQNl4QDgV4= +cloud.google.com/go/longrunning v1.1.0/go.mod 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b/postgres/example_helpers_test.go new file mode 100644 index 0000000..c330a88 --- /dev/null +++ b/postgres/example_helpers_test.go @@ -0,0 +1,42 @@ +package postgres_test + +import ( + "context" + "fmt" + "testing" +) + +// exampleT stands in for the *testing.T a runnable example does not have. +// A zero testing.T would accept t.Cleanup and never run it, so every +// database an example created stayed on the server; exampleT runs the +// cleanups when the example is done. It implements only what the library +// calls; anything else falls through to the nil embedded TB and panics, +// which is the right outcome for an example that strays outside that set. +type exampleT struct { + testing.TB + cleanups []func() +} + +func newExampleT() *exampleT { return &exampleT{} } + +func (t *exampleT) Helper() {} +func (t *exampleT) Cleanup(f func()) { t.cleanups = append(t.cleanups, f) } +func (t *exampleT) Context() context.Context { return context.Background() } +func (t *exampleT) Failed() bool { return false } + +// Logf drops the library's verbose logging, which is not part of an +// example's output. +func (t *exampleT) Logf(string, ...any) {} + +// Errorf and Fatalf surface failures: printing to stdout breaks the +// example's expected output, so the example fails visibly. +func (t *exampleT) Errorf(format string, args ...any) { fmt.Printf("error: "+format+"\n", args...) } +func (t *exampleT) Fatalf(format string, args ...any) { panic(fmt.Sprintf(format, args...)) } +func (t *exampleT) Fatal(args ...any) { panic(fmt.Sprint(args...)) } + +// done runs the cleanups in reverse order, as testing does for a real T. +func (t *exampleT) done() { + for i := len(t.cleanups) - 1; i >= 0; i-- { + t.cleanups[i]() + } +} diff --git a/postgres/example_test.go b/postgres/example_test.go index 10b8936..e746200 100644 --- a/postgres/example_test.go +++ b/postgres/example_test.go @@ -17,7 +17,8 @@ import ( // Example_setup demonstrates basic usage of postgres.Setup for creating // isolated test databases with automatic cleanup. func Example_setup() { - t := &testing.T{} + t := newExampleT() + defer t.done() // Create isolated test database with the schema applied // Cleanup is automatic via t.Cleanup() @@ -79,7 +80,8 @@ func Example_parallel() { // Example_configuration demonstrates configuration options. func Example_configuration() { - t := &testing.T{} + t := newExampleT() + defer t.done() pool := postgres.Setup(t, testdb.WithMigrator(postgres.SQLFiles("../testdata/postgres/schema")), @@ -102,7 +104,7 @@ func Example_configuration() { // Example_helperFunction demonstrates the helper function pattern for // consistent test setup. func Example_helperFunction() { - setupDB := func(t *testing.T) *pgxpool.Pool { + setupDB := func(t testing.TB) *pgxpool.Pool { t.Helper() return postgres.Setup(t, testdb.WithMigrator(postgres.SQLFiles("../testdata/postgres/schema")), @@ -110,7 +112,8 @@ func Example_helperFunction() { ) } - t := &testing.T{} + t := newExampleT() + defer t.done() pool := setupDB(t) if err := pool.Ping(context.Background()); err != nil { @@ -133,7 +136,8 @@ func (g *GormExampleInitializer) InitializeTestDatabase(ctx context.Context, dsn // Example_gorm demonstrates using postgres.New() with GORM for custom database initialization. func Example_gorm() { - t := &testing.T{} + t := newExampleT() + defer t.done() // Create test database with GORM initializer // postgres.New() is used instead of postgres.Setup() when you need custom initialization @@ -179,7 +183,8 @@ func Example_gorm() { // Example_setupVsNew demonstrates when to use Setup() vs New(). func Example_setupVsNew() { - t := &testing.T{} + t := newExampleT() + defer t.done() // Use Setup() when working with pgx/pgxpool directly // Returns *pgxpool.Pool - simplest API @@ -222,7 +227,8 @@ func Example_setupVsNew() { // // For PostgreSQL-specific features, use PoolInitializer or Setup() instead. func Example_sqlDB() { - t := &testing.T{} + t := newExampleT() + defer t.done() // Create test database with sql.DB db := postgres.New(t, &postgres.SqlDbInitializer{}) @@ -276,7 +282,8 @@ func Example_sqlDB() { // Example_basicUsage demonstrates creating an isolated test database. func Example_basicUsage() { - t := &testing.T{} + t := newExampleT() + defer t.done() // Create isolated test database pool := postgres.Setup(t) @@ -298,7 +305,8 @@ func Example_basicUsage() { // Example_customPrefix demonstrates using a custom database name prefix. func Example_customPrefix() { - t := &testing.T{} + t := newExampleT() + defer t.done() pool := postgres.Setup(t, testdb.WithDBPrefix("myapp"), @@ -328,7 +336,8 @@ func Example_customPrefix() { // Example_multipleOptions demonstrates combining multiple configuration options. func Example_multipleOptions() { - t := &testing.T{} + t := newExampleT() + defer t.done() pool := postgres.Setup(t, testdb.WithDBPrefix("test"), @@ -376,7 +385,8 @@ func Example_multipleOptions() { // database, no migration tool required. For goose, tern or golang-migrate, // use the adapter modules under github.com/bashhack/testdb/migrate. func Example_sqlFiles() { - t := &testing.T{} + t := newExampleT() + defer t.done() pool := postgres.Setup(t, testdb.WithMigrator(postgres.SQLFiles("../testdata/postgres/schema")), @@ -420,7 +430,8 @@ func Example_sqlFiles() { // Example_customMigrator shows that any function taking a context and a DSN // can prepare the database: here, a few statements run directly. func Example_customMigrator() { - t := &testing.T{} + t := newExampleT() + defer t.done() createSchema := func(ctx context.Context, dsn string) error { conn, err := pgxpool.New(ctx, dsn)