Test freezes for no apparent reason

[onsi]

This was originally over at onsi/ginkgo#71

The following is an extraction of a freezing test. When you run the following, Hello!!! gets printed, but Bye!!! does not because Expect(d.Db).To(BeNil()) freezes for no apparent reason. Go bug?

package test

import (
        "database/sql"
        "fmt"
        "testing"

        . "github.com/onsi/ginkgo"
        . "github.com/onsi/gomega"

        _ "github.com/mattn/go-sqlite3"
)

type Database struct {
        Db *sql.DB
}

func NewSqliteDatabase(dbfile string) (*Database, error) {
        db, err := sql.Open("sqlite3", dbfile)
        if err != nil {
                return nil, err
        }
        return &Database{Db: db}, nil
}

func TestFoo(t *testing.T) {
        RegisterFailHandler(Fail)
        RunSpecs(t, "foo")
}

var _ = Describe("Foo", func() {
        var (
                d *Database
        )

        Describe("NewSqliteDatabase()", func() {
                BeforeEach(func() {
                        d, _ = NewSqliteDatabase("/tmp/test.sqlite3")
                })

                It("opens a sqlite3 database and returns *Database", func() {
                        fmt.Println("Hello!!!")
                        Expect(d.Db).To(BeNil())
                        fmt.Println("Bye!!!")
                })
        })

        AfterEach(func() {
                if d != nil && d.Db != nil {
                        d.Db.Close()
                }
        })
})

Expected Behavior:

$ ginkgo
Running Suite: foo
==================
Random Seed: 1400479221
Will run 1 of 1 specs

Hello!!!
• Failure [0.009 seconds]
Foo
/home/action/workspace/test/foo_test.go:53
  NewSqliteDatabase()
  /home/action/workspace/test/foo_test.go:46
    opens a sqlite3 database and returns *Database [It]
    /home/action/workspace/test/foo_test.go:45

    Expected
        <*sql.DB | 0xc210070c80>: { ... }
    to be nil

    /home/action/workspace/test/foo_test.go:43
------------------------------

Ran 1 of 1 Specs in 0.018 seconds
FAIL! -- 0 Passed | 1 Failed | 0 Pending | 0 Skipped --- FAIL: TestFoo (0.02 seconds)
FAIL

Ginkgo ran in 1.448502789s
Test Suite Failed

Actual Behavior:

$ ginkgo
test: ginkgo
Running Suite: foo
==================
Random Seed: 1400479000
Will run 1 of 1 specs

Hello!!!
^C
Ran 1 of 1 Specs in 29.979 seconds
FAIL! -- 0 Passed | 0 Failed | 0 Pending | 0 Skipped
Ginkgo ran in 31.682427676s

$ go version
go version go1.2.2 linux/amd64
$ ginkgo version
Ginkgo Version 1.0.0-beta

[onsi]

It looks like *sql.DB has a deeply nested recursive structure. I've changed the maximum nesting-level that Gomega's formatter will traversed to 10 (it used to be 20 which is crazy high).

This will prevent your test from hanging but will dump a ton of output to screen. I'm going to make the output configurable as part of #37 so you'll be able to control just how much output you get pretty soon.