jschoubben
bf82805cfd
Design 29 §1's load-bearing rule: a module names its events, tools and seats locally and the mesh derives the subject, so reorganising the subject space leaves every manifest correct. It held by construction, and a rule held by construction is one a later field breaks quietly.
74 lines
2.0 KiB
Go
74 lines
2.0 KiB
Go
package catalogue
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import (
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"encoding/json"
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"os"
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"path/filepath"
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"regexp"
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"strings"
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"testing"
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)
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// **A manifest holds no subject** (novox/hq design 29 §1).
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//
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// A module names its events, tools and seats locally, and the mesh derives where they land. The
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// property that buys: reorganise the subject space and every manifest in the catalogue is still
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// correct. It holds today by construction — nothing reads a subject from a manifest — and a rule
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// held by construction is one a later field breaks quietly, with the symptom appearing as a
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// permission that does not match a subject rather than as a manifest that was wrong.
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func TestNoManifestContainsASubject(t *testing.T) {
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root := filepath.Join("..", "..", "..", "mesh-catalog", "modules")
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entries, err := os.ReadDir(root)
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if err != nil {
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t.Skipf("catalogue sibling not present: %v", err)
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}
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// Anything in the mesh's own subject space, and anything shaped like a wire address.
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subject := regexp.MustCompile(`^(mesh|\$JS)\.[a-zA-Z0-9_*>.-]+$`)
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var found []string
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var walk func(module string, path string, v any)
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walk = func(module, path string, v any) {
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switch t := v.(type) {
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case string:
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if subject.MatchString(t) {
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found = append(found, module+" "+path+" = "+t)
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}
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case map[string]any:
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for k, inner := range t {
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walk(module, path+"."+k, inner)
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}
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case []any:
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for _, inner := range t {
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walk(module, path+"[]", inner)
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}
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}
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}
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checked := 0
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for _, e := range entries {
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if !e.IsDir() {
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continue
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}
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raw, err := os.ReadFile(filepath.Join(root, e.Name(), "module.json"))
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if err != nil {
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continue
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}
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var m any
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if err := json.Unmarshal(raw, &m); err != nil {
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t.Errorf("%s: %v", e.Name(), err)
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continue
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}
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checked++
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walk(e.Name(), "", m)
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}
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if checked == 0 {
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t.Skip("no manifests read")
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}
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if len(found) > 0 {
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t.Errorf("a manifest names a subject, so reorganising the subject space would mean "+
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"editing the catalogue:\n %s", strings.Join(found, "\n "))
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}
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t.Logf("%d manifests hold no subject", checked)
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}
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