terraform/builtin/providers/test/data_source_test.go

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package test
import (
"errors"
"fmt"
"regexp"
"strings"
"testing"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/terraform"
)
func TestDataSource_dataSourceCount(t *testing.T) {
resource.UnitTest(t, resource.TestCase{
Providers: testAccProviders,
CheckDestroy: func(s *terraform.State) error {
return nil
},
Steps: []resource.TestStep{
{
Config: strings.TrimSpace(`
data "test_data_source" "test" {
count = 3
input = "count-${count.index}"
}
resource "test_resource" "foo" {
required = "yep"
required_map = {
key = "value"
}
list = "${data.test_data_source.test.*.output}"
}
`),
Check: func(s *terraform.State) error {
res, hasRes := s.RootModule().Resources["test_resource.foo"]
if !hasRes {
return errors.New("No test_resource.foo in state")
}
if res.Primary.Attributes["list.#"] != "3" {
return errors.New("Wrong list.#, expected 3")
}
if res.Primary.Attributes["list.0"] != "count-0" {
return errors.New("Wrong list.0, expected count-0")
}
if res.Primary.Attributes["list.1"] != "count-1" {
return errors.New("Wrong list.0, expected count-1")
}
if res.Primary.Attributes["list.2"] != "count-2" {
return errors.New("Wrong list.0, expected count-2")
}
return nil
},
},
},
})
}
// Test that the output of a data source can be used as the value for
// a "count" in a real resource. This would fail with "count cannot be computed"
// at some point.
func TestDataSource_valueAsResourceCount(t *testing.T) {
resource.UnitTest(t, resource.TestCase{
Providers: testAccProviders,
CheckDestroy: func(s *terraform.State) error {
return nil
},
Steps: []resource.TestStep{
{
Config: strings.TrimSpace(`
data "test_data_source" "test" {
input = "4"
}
resource "test_resource" "foo" {
count = "${data.test_data_source.test.output}"
required = "yep"
required_map = {
key = "value"
}
}
`),
Check: func(s *terraform.State) error {
count := 0
for k, _ := range s.RootModule().Resources {
if strings.HasPrefix(k, "test_resource.foo.") {
count++
}
}
if count != 4 {
return fmt.Errorf("bad count: %d", count)
}
return nil
},
},
},
})
}
// TestDataSource_dataSourceCountGrandChild tests that a grandchild data source
// that is based off of count works, ie: dependency chain foo -> bar -> baz.
// This was failing because CountBoundaryTransformer is being run during apply
// instead of plan, which meant that it wasn't firing after data sources were
// potentially changing state and causing diff/interpolation issues.
//
// This happens after the initial apply, after state is saved.
func TestDataSource_dataSourceCountGrandChild(t *testing.T) {
resource.UnitTest(t, resource.TestCase{
Providers: testAccProviders,
CheckDestroy: func(s *terraform.State) error {
return nil
},
Steps: []resource.TestStep{
{
Config: dataSourceCountGrandChildConfig,
},
{
Config: dataSourceCountGrandChildConfig,
Check: func(s *terraform.State) error {
for _, v := range []string{"foo", "bar", "baz"} {
count := 0
for k := range s.RootModule().Resources {
if strings.HasPrefix(k, fmt.Sprintf("data.test_data_source.%s.", v)) {
count++
}
}
if count != 2 {
return fmt.Errorf("bad count for data.test_data_source.%s: %d", v, count)
}
}
return nil
},
},
},
})
}
const dataSourceCountGrandChildConfig = `
data "test_data_source" "foo" {
count = 2
input = "one"
}
data "test_data_source" "bar" {
count = "${length(data.test_data_source.foo.*.id)}"
input = "${data.test_data_source.foo.*.output[count.index]}"
}
data "test_data_source" "baz" {
count = "${length(data.test_data_source.bar.*.id)}"
input = "${data.test_data_source.bar.*.output[count.index]}"
}
`
func TestDataSource_nilComputedValues(t *testing.T) {
check := func(s *terraform.State) error {
return nil
}
resource.UnitTest(t, resource.TestCase{
Providers: testAccProviders,
Steps: []resource.TestStep{
{
Check: check,
Config: `
variable "index" {
default = "d"
}
locals {
name = {
a = "something"
b = "else"
}
}
data "test_data_source" "x" {
input = "${lookup(local.name, var.index, local.name["a"])}"
}
data "test_data_source" "y" {
input = data.test_data_source.x.nil == "something" ? "something" : "else"
}`,
},
},
})
}
// referencing test_data_source.one.output_map["a"] should produce an error when
// there's a count.
func TestDataSource_indexedCountOfOne(t *testing.T) {
resource.UnitTest(t, resource.TestCase{
Providers: testAccProviders,
Steps: []resource.TestStep{
{
Config: strings.TrimSpace(`
data "test_data_source" "one" {
count = 1
input_map = {
"a" = "b"
}
}
data "test_data_source" "two" {
input_map = {
"x" = data.test_data_source.one.output_map["a"]
}
}
`),
ExpectError: regexp.MustCompile("Because data.test_data_source.one has \"count\" set, its attributes must be accessed on specific instances"),
},
},
})
}
// Verify that we can destroy when a data source references something with a
// count of 1.
func TestDataSource_countRefDestroyError(t *testing.T) {
resource.UnitTest(t, resource.TestCase{
Providers: testAccProviders,
Steps: []resource.TestStep{
{
Config: strings.TrimSpace(`
data "test_data_source" "one" {
count = 1
input = "a"
}
data "test_data_source" "two" {
input = data.test_data_source.one[0].output
}
`),
},
},
})
}
func TestDataSource_planUpdate(t *testing.T) {
resource.UnitTest(t, resource.TestCase{
Providers: testAccProviders,
Steps: []resource.TestStep{
{
Config: strings.TrimSpace(`
resource "test_resource" "a" {
required = "first"
required_map = {
key = "1"
}
optional_force_new = "first"
}
data "test_data_source" "a" {
input = "${test_resource.a.computed_from_required}"
}
output "out" {
value = "${data.test_data_source.a.output}"
}
`),
},
{
Config: strings.TrimSpace(`
resource "test_resource" "a" {
required = "second"
required_map = {
key = "1"
}
optional_force_new = "second"
}
data "test_data_source" "a" {
input = "${test_resource.a.computed_from_required}"
}
output "out" {
value = "${data.test_data_source.a.output}"
}
`),
Check: resource.ComposeAggregateTestCheckFunc(
resource.TestCheckResourceAttr("data.test_data_source.a", "output", "second"),
resource.TestCheckOutput("out", "second"),
),
},
},
})
}