d6fc633aa0
For applications already using hcldec, a decoder specification can be used to automatically drive the recursive variable detection walk that begins with WalkForEachVariables, allowing all "for_each" and "labels" variables in a recursive block structure to be detected in a single call.
120 lines
2.7 KiB
Go
120 lines
2.7 KiB
Go
package dynblock
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import (
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"reflect"
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"testing"
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"github.com/hashicorp/hcl2/hcldec"
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"github.com/zclconf/go-cty/cty"
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"github.com/davecgh/go-spew/spew"
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"github.com/hashicorp/hcl2/hcl"
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"github.com/hashicorp/hcl2/hcl/hclsyntax"
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)
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func TestForEachVariables(t *testing.T) {
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const src = `
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# We have some references to things inside the "val" attribute inside each
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# of our "b" blocks, but since our ForEachVariables walk only considers
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# "for_each" and "labels" within a dynamic block we do _not_ expect these
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# to be in the output.
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a {
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dynamic "b" {
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for_each = [for i, v in some_list_0: "${i}=${v},${baz}"]
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labels = ["${b.value} ${something_else_0}"]
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content {
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val = "${b.value} ${something_else_1}"
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}
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}
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}
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dynamic "a" {
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for_each = some_list_1
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content {
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b "foo" {
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val = "${a.value} ${something_else_2}"
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}
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dynamic "b" {
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for_each = some_list_2
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iterator = dyn_b
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labels = ["${a.value} ${dyn_b.value} ${b} ${something_else_3}"]
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content {
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val = "${a.value} ${dyn_b.value} ${something_else_4}"
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}
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}
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}
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}
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dynamic "a" {
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for_each = some_list_3
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iterator = dyn_a
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content {
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b "foo" {
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val = "${dyn_a.value} ${something_else_5}"
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}
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dynamic "b" {
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for_each = some_list_4
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labels = ["${dyn_a.value} ${b.value} ${a} ${something_else_6}"]
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content {
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val = "${dyn_a.value} ${b.value} ${something_else_7}"
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}
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}
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}
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}
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`
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f, diags := hclsyntax.ParseConfig([]byte(src), "", hcl.Pos{})
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if len(diags) != 0 {
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t.Errorf("unexpected diagnostics during parse")
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for _, diag := range diags {
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t.Logf("- %s", diag)
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}
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return
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}
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spec := &hcldec.BlockListSpec{
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TypeName: "a",
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Nested: &hcldec.BlockListSpec{
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TypeName: "b",
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Nested: &hcldec.AttrSpec{
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Name: "val",
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Type: cty.String,
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},
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},
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}
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traversals := ForEachVariablesHCLDec(f.Body, spec)
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got := make([]string, len(traversals))
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for i, traversal := range traversals {
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got[i] = traversal.RootName()
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}
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// The block structure is traversed one level at a time, so the ordering
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// here is reflecting first a pass of the root, then the first child
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// under the root, then the first child under that, etc.
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want := []string{
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"some_list_1",
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"some_list_3",
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"some_list_0",
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"baz",
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"something_else_0",
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"some_list_2",
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"b", // This is correct because it is referenced in a context where the iterator is overridden to be dyn_b
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"something_else_3",
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"some_list_4",
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"a", // This is correct because it is referenced in a context where the iterator is overridden to be dyn_a
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"something_else_6",
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}
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if !reflect.DeepEqual(got, want) {
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t.Errorf("wrong result\ngot: %swant: %s", spew.Sdump(got), spew.Sdump(want))
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}
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}
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