Monorepo for Tangled
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Go
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import ( "strings" "testing")
type testManifest struct { Image string `yaml:"image"` Registry map[string]any `yaml:"registry"` Dependencies []string `yaml:"dependencies"` Nested map[string][]string `yaml:"nested"` Steps []struct { Name string `yaml:"name"` } `yaml:"steps"`}
func TestDescribeManifestError(t *testing.T) { cases := []struct { name string raw string want []string // substrings the message must contain }{ { name: "map field written as list", raw: "registry:\n - nixpkgs: github:nixos/nixpkgs\n", want: []string{"registry", "a mapping", "a list"}, }, { name: "list field written as scalar", raw: "dependencies: bun\n", want: []string{"dependencies", "a list", "a scalar value"}, }, { name: "scalar field written as mapping", raw: "image:\n name: nixos\n", want: []string{"image", "a scalar value", "a mapping"}, }, { name: "nested map value mis-shaped", raw: "nested:\n foo: bar\n", // foo should be a list of strings want: []string{"nested.foo", "a list", "a scalar value"}, }, { name: "field inside a list element mis-shaped", raw: "steps:\n - name:\n x: y\n", // steps[0].name should be a scalar want: []string{"steps[0].name", "a scalar value", "a mapping"}, }, { name: "unknown top-level field (typo)", raw: "dependancies:\n - bun\n", want: []string{"unknown field", "dependancies"}, }, { name: "unknown field inside a list element", raw: "steps:\n - name: x\n cmd: y\n", // it's `command`, not `cmd` want: []string{"unknown field", "steps[0].cmd"}, }, { // `name` (filename-sourced, yaml:"-") must be tolerated so the real // typo `registre` on a later line is the thing that surfaces. name: "tolerated name does not mask a later typo", raw: "name: mill\nengine: microvm\nregistre:\n - x: y\n", want: []string{"unknown field", "registre"}, }, } for _, tc := range cases { t.Run(tc.name, func(t *testing.T) { err := DescribeManifestError(tc.raw, testManifest{}) if err == nil { t.Fatalf("expected an error, got nil") } for _, w := range tc.want { if !strings.Contains(err.Error(), w) { t.Errorf("error %q missing %q", err, w) } } }) }}
func TestDescribeManifestErrorNoFalsePositives(t *testing.T) { cases := []string{ // well-formed manifest "image: nixos\nregistry:\n nixpkgs: github:nixos/nixpkgs\ndependencies:\n - bun\n", // empty value is harmless, not a mismatch "image: nixos\nregistry:\n", // generic workflow keys live in the same doc and aren't engine fields, // but must not be flagged as unknown at the root "engine: microvm\nwhen:\n - event: [push]\nclone:\n skip: true\nimage: nixos\n", // `any` map values accept any shape, including nested lists/maps "registry:\n k:\n - a\n - b\n", // well-formed nested map-of-lists "nested:\n foo:\n - a\n - b\n", // user-defined map keys are data, never flagged as unknown fields "nested:\n any-package-name:\n - a\n", } for _, raw := range cases { if err := DescribeManifestError(raw, testManifest{}); err != nil { t.Errorf("DescribeManifestError(%q) = %v, want nil", raw, err) } }}
func TestDescribeManifestErrorPointerSchema(t *testing.T) { // nixery passes a pointer to an anonymous struct schema := &testManifest{} err := DescribeManifestError("nested: oops\n", schema) if err == nil || !strings.Contains(err.Error(), "nested") { t.Fatalf("expected an error naming `nested`, got %v", err) }}