Separate integration tests

A common use case for build tags is separating regular unit tests from integration tests that require external resources, like a database or network access.

To do this, add a custom build constraint to the top of the test file:

// +build integration

package main

import (
    "testing"
)

func TestThatRequiresNetworkAccess(t *testing.T) {
    t.Fatal("It failed!")
}

Those tests will not be compiles unless you run tests with go test -tags "integration".

Results:

$ go test
?       bitbucket.org/yourname/yourproject    [no test files]
$ go test -tags "integration"
--- FAIL: TestThatRequiresNetworkAccess (0.00s)
        main_test.go:10: It failed!
FAIL
exit status 1
FAIL    bitbucket.org/yourname/yourproject    0.003s