providers/template: add tests, address review comments

Do directory expansion on filenames.

Add basic acceptance tests. Code coverage is 72.5%.
Uncovered code is uninteresting and/or impossible error cases.

Note that this required adding a knob to
helper/resource.TestStep to allow transient
resources.
This commit is contained in:
Josh Bleecher Snyder 2015-05-04 10:26:17 -07:00
parent 745d83a995
commit 76bcac3031
3 changed files with 74 additions and 3 deletions

View File

@ -10,6 +10,7 @@ import (
"github.com/hashicorp/terraform/config/lang"
"github.com/hashicorp/terraform/config/lang/ast"
"github.com/hashicorp/terraform/helper/schema"
"github.com/mitchellh/go-homedir"
)
func resource() *schema.Resource {
@ -35,7 +36,6 @@ func resource() *schema.Resource {
"rendered": &schema.Schema{
Type: schema.TypeString,
Computed: true,
Default: nil,
Description: "rendered template",
},
},
@ -55,11 +55,18 @@ func Exists(d *schema.ResourceData, meta interface{}) (bool, error) {
return false, nil
}
var readfile func(string) ([]byte, error) = ioutil.ReadFile // testing hook
func eval(d *schema.ResourceData) error {
filename := d.Get("filename").(string)
vars := d.Get("vars").(map[string]interface{})
buf, err := ioutil.ReadFile(filename)
path, err := homedir.Expand(filename)
if err != nil {
return err
}
buf, err := readfile(path)
if err != nil {
return err
}

View File

@ -0,0 +1,58 @@
package template
import (
"fmt"
"testing"
r "github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/terraform"
)
var testProviders = map[string]terraform.ResourceProvider{
"template": Provider(),
}
func TestTemplateRendering(t *testing.T) {
var cases = []struct {
vars string
template string
want string
}{
{`{}`, `ABC`, `ABC`},
{`{a="foo"}`, `${a}`, `foo`},
{`{a="hello"}`, `${replace(a, "ello", "i")}`, `hi`},
{`{}`, `${1+2+3}`, `6`},
}
for _, tt := range cases {
r.Test(t, r.TestCase{
PreCheck: func() {
readfile = func(string) ([]byte, error) {
return []byte(tt.template), nil
}
},
Providers: testProviders,
Steps: []r.TestStep{
r.TestStep{
Config: `
resource "template_file" "t0" {
filename = "mock"
vars = ` + tt.vars + `
}
output "rendered" {
value = "${template_file.t0.rendered}"
}
`,
Check: func(s *terraform.State) error {
got := s.RootModule().Outputs["rendered"]
if tt.want != got {
return fmt.Errorf("template:\n%s\nvars:\n%s\ngot:\n%s\nwant:\n%s\n", tt.template, tt.vars, got, tt.want)
}
return nil
},
TransientResource: true,
},
},
})
}
}

View File

@ -75,6 +75,12 @@ type TestStep struct {
// Destroy will create a destroy plan if set to true.
Destroy bool
// TransientResource indicates that resources created as part
// of this test step are temporary and might be recreated anew
// with every planning step. This should only be set for
// pseudo-resources, like the null resource or templates.
TransientResource bool
}
// Test performs an acceptance test on a resource.
@ -260,7 +266,7 @@ func testStep(
if p, err := ctx.Plan(); err != nil {
return state, fmt.Errorf("Error on second follow-up plan: %s", err)
} else {
if p.Diff != nil && !p.Diff.Empty() {
if p.Diff != nil && !p.Diff.Empty() && !step.TransientResource {
return state, fmt.Errorf(
"After applying this step and refreshing, the plan was not empty:\n\n%s", p)
}