terraform/internal/addrs/parse_ref_test.go

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package addrs
import (
"testing"
"github.com/go-test/deep"
"github.com/hashicorp/hcl/v2"
"github.com/hashicorp/hcl/v2/hclsyntax"
"github.com/hashicorp/terraform/internal/tfdiags"
"github.com/zclconf/go-cty/cty"
)
func TestParseRef(t *testing.T) {
tests := []struct {
Input string
Want *Reference
WantErr string
}{
// count
{
`count.index`,
&Reference{
Subject: CountAttr{
Name: "index",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 12, Byte: 11},
},
},
``,
},
{
`count.index.blah`,
&Reference{
Subject: CountAttr{
Name: "index",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 12, Byte: 11},
},
Remaining: hcl.Traversal{
hcl.TraverseAttr{
Name: "blah",
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 12, Byte: 11},
End: hcl.Pos{Line: 1, Column: 17, Byte: 16},
},
},
},
},
``, // valid at this layer, but will fail during eval because "index" is a number
},
{
`count`,
nil,
`The "count" object cannot be accessed directly. Instead, access one of its attributes.`,
},
{
`count["hello"]`,
nil,
`The "count" object does not support this operation.`,
},
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// each
{
`each.key`,
&Reference{
Subject: ForEachAttr{
Name: "key",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 9, Byte: 8},
},
},
``,
},
{
`each.value.blah`,
&Reference{
Subject: ForEachAttr{
Name: "value",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 11, Byte: 10},
},
Remaining: hcl.Traversal{
hcl.TraverseAttr{
Name: "blah",
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 11, Byte: 10},
End: hcl.Pos{Line: 1, Column: 16, Byte: 15},
},
},
},
},
``,
},
{
`each`,
nil,
`The "each" object cannot be accessed directly. Instead, access one of its attributes.`,
},
{
`each["hello"]`,
nil,
`The "each" object does not support this operation.`,
},
// data
{
`data.external.foo`,
&Reference{
Subject: Resource{
Mode: DataResourceMode,
Type: "external",
Name: "foo",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 18, Byte: 17},
},
},
``,
},
{
`data.external.foo.bar`,
&Reference{
Subject: ResourceInstance{
Resource: Resource{
Mode: DataResourceMode,
Type: "external",
Name: "foo",
},
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 18, Byte: 17},
},
Remaining: hcl.Traversal{
hcl.TraverseAttr{
Name: "bar",
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 18, Byte: 17},
End: hcl.Pos{Line: 1, Column: 22, Byte: 21},
},
},
},
},
``,
},
{
`data.external.foo["baz"].bar`,
&Reference{
Subject: ResourceInstance{
Resource: Resource{
Mode: DataResourceMode,
Type: "external",
Name: "foo",
},
Key: StringKey("baz"),
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 25, Byte: 24},
},
Remaining: hcl.Traversal{
hcl.TraverseAttr{
Name: "bar",
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 25, Byte: 24},
End: hcl.Pos{Line: 1, Column: 29, Byte: 28},
},
},
},
},
``,
},
{
`data.external.foo["baz"]`,
&Reference{
Subject: ResourceInstance{
Resource: Resource{
Mode: DataResourceMode,
Type: "external",
Name: "foo",
},
Key: StringKey("baz"),
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 25, Byte: 24},
},
},
``,
},
{
`data`,
nil,
`The "data" object must be followed by two attribute names: the data source type and the resource name.`,
},
{
`data.external`,
nil,
`The "data" object must be followed by two attribute names: the data source type and the resource name.`,
},
// local
{
`local.foo`,
&Reference{
Subject: LocalValue{
Name: "foo",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 10, Byte: 9},
},
},
``,
},
{
`local.foo.blah`,
&Reference{
Subject: LocalValue{
Name: "foo",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 10, Byte: 9},
},
Remaining: hcl.Traversal{
hcl.TraverseAttr{
Name: "blah",
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 10, Byte: 9},
End: hcl.Pos{Line: 1, Column: 15, Byte: 14},
},
},
},
},
``,
},
{
`local.foo["blah"]`,
&Reference{
Subject: LocalValue{
Name: "foo",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 10, Byte: 9},
},
Remaining: hcl.Traversal{
hcl.TraverseIndex{
Key: cty.StringVal("blah"),
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 10, Byte: 9},
End: hcl.Pos{Line: 1, Column: 18, Byte: 17},
},
},
},
},
``,
},
{
`local`,
nil,
`The "local" object cannot be accessed directly. Instead, access one of its attributes.`,
},
{
`local["foo"]`,
nil,
`The "local" object does not support this operation.`,
},
// module
{
`module.foo`,
&Reference{
Subject: ModuleCall{
Name: "foo",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 11, Byte: 10},
},
},
``,
},
{
`module.foo.bar`,
&Reference{
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Subject: AbsModuleCallOutput{
Call: ModuleCallInstance{
Call: ModuleCall{
Name: "foo",
},
},
Name: "bar",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 15, Byte: 14},
},
},
``,
},
{
`module.foo.bar.baz`,
&Reference{
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Subject: AbsModuleCallOutput{
Call: ModuleCallInstance{
Call: ModuleCall{
Name: "foo",
},
},
Name: "bar",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 15, Byte: 14},
},
Remaining: hcl.Traversal{
hcl.TraverseAttr{
Name: "baz",
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 15, Byte: 14},
End: hcl.Pos{Line: 1, Column: 19, Byte: 18},
},
},
},
},
``,
},
{
`module.foo["baz"]`,
&Reference{
Subject: ModuleCallInstance{
Call: ModuleCall{
Name: "foo",
},
Key: StringKey("baz"),
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 18, Byte: 17},
},
},
``,
},
{
`module.foo["baz"].bar`,
&Reference{
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Subject: AbsModuleCallOutput{
Call: ModuleCallInstance{
Call: ModuleCall{
Name: "foo",
},
Key: StringKey("baz"),
},
Name: "bar",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 22, Byte: 21},
},
},
``,
},
{
`module.foo["baz"].bar.boop`,
&Reference{
2020-03-20 17:18:48 +01:00
Subject: AbsModuleCallOutput{
Call: ModuleCallInstance{
Call: ModuleCall{
Name: "foo",
},
Key: StringKey("baz"),
},
Name: "bar",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 22, Byte: 21},
},
Remaining: hcl.Traversal{
hcl.TraverseAttr{
Name: "boop",
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 22, Byte: 21},
End: hcl.Pos{Line: 1, Column: 27, Byte: 26},
},
},
},
},
``,
},
{
`module`,
nil,
`The "module" object cannot be accessed directly. Instead, access one of its attributes.`,
},
{
`module["foo"]`,
nil,
`The "module" object does not support this operation.`,
},
// path
{
`path.module`,
&Reference{
Subject: PathAttr{
Name: "module",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 12, Byte: 11},
},
},
``,
},
{
`path.module.blah`,
&Reference{
Subject: PathAttr{
Name: "module",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 12, Byte: 11},
},
Remaining: hcl.Traversal{
hcl.TraverseAttr{
Name: "blah",
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 12, Byte: 11},
End: hcl.Pos{Line: 1, Column: 17, Byte: 16},
},
},
},
},
``, // valid at this layer, but will fail during eval because "module" is a string
},
{
`path`,
nil,
`The "path" object cannot be accessed directly. Instead, access one of its attributes.`,
},
{
`path["module"]`,
nil,
`The "path" object does not support this operation.`,
},
// self
{
`self`,
&Reference{
Subject: Self,
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 5, Byte: 4},
},
},
``,
},
{
`self.blah`,
&Reference{
Subject: Self,
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 5, Byte: 4},
},
Remaining: hcl.Traversal{
hcl.TraverseAttr{
Name: "blah",
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 5, Byte: 4},
End: hcl.Pos{Line: 1, Column: 10, Byte: 9},
},
},
},
},
``,
},
// terraform
{
`terraform.workspace`,
&Reference{
Subject: TerraformAttr{
Name: "workspace",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 20, Byte: 19},
},
},
``,
},
{
`terraform.workspace.blah`,
&Reference{
Subject: TerraformAttr{
Name: "workspace",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 20, Byte: 19},
},
Remaining: hcl.Traversal{
hcl.TraverseAttr{
Name: "blah",
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 20, Byte: 19},
End: hcl.Pos{Line: 1, Column: 25, Byte: 24},
},
},
},
},
``, // valid at this layer, but will fail during eval because "workspace" is a string
},
{
`terraform`,
nil,
`The "terraform" object cannot be accessed directly. Instead, access one of its attributes.`,
},
{
`terraform["workspace"]`,
nil,
`The "terraform" object does not support this operation.`,
},
// var
{
`var.foo`,
&Reference{
Subject: InputVariable{
Name: "foo",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 8, Byte: 7},
},
},
``,
},
{
`var.foo.blah`,
&Reference{
Subject: InputVariable{
Name: "foo",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 8, Byte: 7},
},
Remaining: hcl.Traversal{
hcl.TraverseAttr{
Name: "blah",
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 8, Byte: 7},
End: hcl.Pos{Line: 1, Column: 13, Byte: 12},
},
},
},
},
``, // valid at this layer, but will fail during eval because "module" is a string
},
{
`var`,
nil,
`The "var" object cannot be accessed directly. Instead, access one of its attributes.`,
},
{
`var["foo"]`,
nil,
`The "var" object does not support this operation.`,
},
lang: Allow "resource." prefix as another way to refer to resources The current way to refer to a managed resource is to use its resource type name as a top-level symbol in the reference. This is convenient and makes sense given that managed resources are the primary kind of object in Terraform. However, it does mean that an externally-extensible namespace (the set of all possible resource type names) overlaps with a reserved word namespace (the special prefixes like "path", "var", etc), and thus introducing any new reserved prefix in future risks masking an existing resource type so it can't be used anymore. We only intend to introduce new reserved symbols as part of future language editions that each module can opt into separately, and when doing so we will always research to try to choose a name that doesn't overlap with commonly-used providers, but not all providers are visible to us and so there is always a small chance that the name we choose will already be in use by a third-party provider. In preparation for that event, this introduces an alternative way to refer to managed resources that mimics the reference style used for data resources: resource.type.name . When using this form, the second portion is _always_ a resource type name and never a reserved word. There is currently no need to use this because all of the already-reserved symbol names are effectively blocked from use by existing Terraform versions that lack this escape hatch. Therefore there's no explicit documentation about it yet. The intended use for this is that a module upgrade tool for a future language edition would detect references to resource types that have now become reserved words and add the "resource." prefix to keep that functionality working. Existing modules that aren't opted in to the new language edition would keep working without that prefix, thus keeping to compatibility promises.
2021-05-15 01:42:30 +02:00
// the "resource" prefix forces interpreting the next name as a
// resource type name. This is an alias for just using a resource
// type name at the top level, to be used only if a later edition
// of the Terraform language introduces a new reserved word that
// overlaps with a resource type name.
{
`resource.boop_instance.foo`,
&Reference{
Subject: Resource{
Mode: ManagedResourceMode,
Type: "boop_instance",
Name: "foo",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 27, Byte: 26},
},
},
``,
},
// We have some names reserved which might be used by a
// still-under-discussion proposal for template values or lazy
// expressions.
{
`template.foo`,
nil,
`The symbol name "template" is reserved for use in a future Terraform version. If you are using a provider that already uses this as a resource type name, add the prefix "resource." to force interpretation as a resource type name.`,
},
{
`lazy.foo`,
nil,
`The symbol name "lazy" is reserved for use in a future Terraform version. If you are using a provider that already uses this as a resource type name, add the prefix "resource." to force interpretation as a resource type name.`,
},
{
`arg.foo`,
nil,
`The symbol name "arg" is reserved for use in a future Terraform version. If you are using a provider that already uses this as a resource type name, add the prefix "resource." to force interpretation as a resource type name.`,
},
// anything else, interpreted as a managed resource reference
{
`boop_instance.foo`,
&Reference{
Subject: Resource{
Mode: ManagedResourceMode,
Type: "boop_instance",
Name: "foo",
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 18, Byte: 17},
},
},
``,
},
{
`boop_instance.foo.bar`,
&Reference{
Subject: ResourceInstance{
Resource: Resource{
Mode: ManagedResourceMode,
Type: "boop_instance",
Name: "foo",
},
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 18, Byte: 17},
},
Remaining: hcl.Traversal{
hcl.TraverseAttr{
Name: "bar",
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 18, Byte: 17},
End: hcl.Pos{Line: 1, Column: 22, Byte: 21},
},
},
},
},
``,
},
{
`boop_instance.foo["baz"].bar`,
&Reference{
Subject: ResourceInstance{
Resource: Resource{
Mode: ManagedResourceMode,
Type: "boop_instance",
Name: "foo",
},
Key: StringKey("baz"),
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 25, Byte: 24},
},
Remaining: hcl.Traversal{
hcl.TraverseAttr{
Name: "bar",
SrcRange: hcl.Range{
Start: hcl.Pos{Line: 1, Column: 25, Byte: 24},
End: hcl.Pos{Line: 1, Column: 29, Byte: 28},
},
},
},
},
``,
},
{
`boop_instance.foo["baz"]`,
&Reference{
Subject: ResourceInstance{
Resource: Resource{
Mode: ManagedResourceMode,
Type: "boop_instance",
Name: "foo",
},
Key: StringKey("baz"),
},
SourceRange: tfdiags.SourceRange{
Start: tfdiags.SourcePos{Line: 1, Column: 1, Byte: 0},
End: tfdiags.SourcePos{Line: 1, Column: 25, Byte: 24},
},
},
``,
},
{
`boop_instance`,
nil,
`A reference to a resource type must be followed by at least one attribute access, specifying the resource name.`,
},
}
for _, test := range tests {
t.Run(test.Input, func(t *testing.T) {
traversal, travDiags := hclsyntax.ParseTraversalAbs([]byte(test.Input), "", hcl.Pos{Line: 1, Column: 1})
if travDiags.HasErrors() {
t.Fatal(travDiags.Error())
}
got, diags := ParseRef(traversal)
switch len(diags) {
case 0:
if test.WantErr != "" {
t.Fatalf("succeeded; want error: %s", test.WantErr)
}
case 1:
if test.WantErr == "" {
t.Fatalf("unexpected diagnostics: %s", diags.Err())
}
if got, want := diags[0].Description().Detail, test.WantErr; got != want {
t.Fatalf("wrong error\ngot: %s\nwant: %s", got, want)
}
default:
t.Fatalf("too many diagnostics: %s", diags.Err())
}
if diags.HasErrors() {
return
}
for _, problem := range deep.Equal(got, test.Want) {
t.Errorf(problem)
}
})
}
}