57 lines
2.2 KiB
Go
57 lines
2.2 KiB
Go
package lang
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import (
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"os"
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"path/filepath"
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"testing"
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)
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// TestALanguageAbsentFromTheRepositoryCutsFromDataAlone is the project's default review question, asked as a
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// test: "will a pair that is NOT in this repository work without editing Go?"
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//
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// Korean is the witness because it answers BOTH halves. It is a CJK-script language, so with no data file it
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// falls to the embedded default and gets that default's marker 第 — which never appears in a Korean book, so
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// nothing is cut. Drop a ko/structure.txt naming 제 and 장, change no Go, and the same text cuts. The data
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// file is the only difference between the two halves.
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func TestALanguageAbsentFromTheRepositoryCutsFromDataAlone(t *testing.T) {
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root := t.TempDir()
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// Half one: no file. The language resolves to the embedded CJK default, whose marker is not Korean.
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bare, err := LoadSourceStructure(root, "ko")
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if err != nil {
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t.Fatal(err)
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}
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if bare == nil {
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t.Fatal("a CJK-script language must still resolve to the embedded default")
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}
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if bare.Units['장'] {
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t.Fatal("the embedded default must not already know the Korean section unit — the test would prove nothing")
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}
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// Half two: the language ships its own grammar. No Go changes, no new package, no registry entry.
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if err := os.MkdirAll(filepath.Join(root, "ko"), 0o755); err != nil {
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t.Fatal(err)
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}
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data := "# Korean chapter grammar\nmarker\t제\nunits\t장\n"
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if err := os.WriteFile(filepath.Join(root, "ko", structureFile), []byte(data), 0o644); err != nil {
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t.Fatal(err)
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}
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st, err := LoadSourceStructure(root, "ko")
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if err != nil {
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t.Fatal(err)
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}
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if len(st.Markers) != 1 || st.Markers[0] != "제" {
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t.Fatalf("markers = %q, want [제]", st.Markers)
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}
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if !st.Units['장'] {
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t.Fatal("the declared section unit did not load")
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}
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if !st.HeaderNumeralRE().MatchString("제1장 시작") {
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t.Fatal("the compiled header pattern does not match the language's own header")
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}
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// The fingerprint must come from the FILE, not from the default: it is what re-cuts the book when the
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// grammar is edited.
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if st.Fingerprint() == bare.Fingerprint() {
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t.Fatal("a book cut by its own grammar must not share the default's cut-tag component")
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}
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}
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