lilleman
98 lines
3.7 KiB
Go
98 lines
3.7 KiB
Go
package fakes
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import "testing"
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// TestRootReferenceAcrossFolders is the headline case: a category in one folder
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// pulls a value from another via a {..path} reference resolved from the data root.
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func TestRootReferenceAcrossFolders(t *testing.T) {
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dir := writeData(t, map[string]string{
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"en_US/person": `["Pat Smith"]`,
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"sv_SE/greeting": `{"format":"Hej, {..en_US.person}!"}`,
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})
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f := newFakes(t, dir, WithSeed(1))
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if got := fake(t, f, "sv_SE.greeting"); got != "Hej, Pat Smith!" {
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t.Fatalf("greeting = %q, want \"Hej, Pat Smith!\"", got)
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}
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}
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// TestReferenceIntoAField reaches a field inside a referenced category, crossing
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// a single-variant choice and then a template field (..who.last).
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func TestReferenceIntoAField(t *testing.T) {
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dir := writeData(t, map[string]string{
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"who": `[{"format":"{first} {last}","first":["Ada"],"last":["Byron"]}]`,
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"card": `{"format":"signed {..who.last}"}`,
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})
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f := newFakes(t, dir, WithSeed(1))
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if got := fake(t, f, "card"); got != "signed Byron" {
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t.Fatalf("card = %q, want \"signed Byron\"", got)
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}
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}
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// TestReferenceInAlternation lets a reference stand as one arm of a {a|..b}
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// alternation, so a field and a cross-file value share one slot.
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func TestReferenceInAlternation(t *testing.T) {
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dir := writeData(t, map[string]string{
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"far": `["X"]`,
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"near": `{"format":"{here|..far}","here":["H"]}`,
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})
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f := newFakes(t, dir, WithSeed(2))
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seen := map[string]bool{}
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for i := 0; i < 100; i++ {
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seen[fake(t, f, "near")] = true
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}
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if !seen["H"] || !seen["X"] || len(seen) != 2 {
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t.Fatalf("alternation produced %v, want both H and X", seen)
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}
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}
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// TestReferenceCombinesLoadedPaths is the point of references over the merge
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// model: data layered from two dirs can point at each other through the root.
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func TestReferenceCombinesLoadedPaths(t *testing.T) {
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a := writeData(t, map[string]string{"en_US/word": `["river"]`})
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b := writeData(t, map[string]string{"mine/slug": `{"format":"the-{..en_US.word}"}`})
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f := newFakesN(t, []string{a, b}, WithSeed(1))
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if got := fake(t, f, "mine.slug"); got != "the-river" {
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t.Fatalf("slug = %q, want the-river", got)
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}
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}
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// TestReferenceChain follows a reference to a node that is itself a reference, so
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// linking order cannot matter.
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func TestReferenceChain(t *testing.T) {
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dir := writeData(t, map[string]string{
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"a": `{"format":"{..b}"}`,
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"b": `{"format":"{..c}"}`,
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"c": `["deep"]`,
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})
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f := newFakes(t, dir, WithSeed(1))
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if got := fake(t, f, "a"); got != "deep" {
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t.Fatalf("a = %q, want deep", got)
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}
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}
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// TestReferenceErrors lists the references New must reject up front, so a bad path
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// fails at load, never at a random render.
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func TestReferenceErrors(t *testing.T) {
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cases := map[string]map[string]string{
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"missing target": {"card": `{"format":"{..nope.gone}"}`},
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"folder target": {"en_US/word": `["w"]`, "card": `{"format":"{..en_US}"}`},
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"multi-variant on the path": {
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"who": `[{"format":"{f}","f":["1"]},{"format":"{f}","f":["2"]}]`,
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"card": `{"format":"{..who.f}"}`,
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},
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"empty reference path": {"card": `{"format":"{..}"}`},
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// A reference that leads back to its own value never terminates at render,
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// so New must reject the cycle up front (direct, mutual, or chained).
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"direct cycle": {"a": `{"format":"x{..a}"}`},
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"mutual cycle": {"a": `{"format":"{..b}"}`, "b": `{"format":"{..a}"}`},
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"chain cycle": {"a": `{"format":"{..b}"}`, "b": `{"format":"{..c}"}`, "c": `{"format":"{..a}"}`},
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// calc renders its operands, so a cycle through one must be caught too.
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"calc operand cycle": {"x": `{"format":"{calc(y)}","y":[{"format":"{..x}"}]}`},
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}
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for name, files := range cases {
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if _, err := New([]string{writeData(t, files)}); err == nil {
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t.Errorf("%s: New = nil error, want a reference error", name)
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}
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}
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}
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