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| 1 | +// SPDX-License-Identifier: AGPL-3.0-or-later |
| 2 | + |
| 3 | +package highlight |
| 4 | + |
| 5 | +import ( |
| 6 | + "strings" |
| 7 | + "testing" |
| 8 | +) |
| 9 | + |
| 10 | +func TestRenderLinesPreservesLineCount(t *testing.T) { |
| 11 | + src := "package main\n\nfunc main() {\n\tprintln(\"hi\")\n}\n" |
| 12 | + lines := RenderLines("main.go", src) |
| 13 | + // strings.Split on the trailing newline produces a final empty |
| 14 | + // element; RenderLines mirrors that so the row table has a row |
| 15 | + // for the final newline (consistent with how vim / GitHub render |
| 16 | + // trailing-newline files). |
| 17 | + want := len(strings.Split(src, "\n")) |
| 18 | + if len(lines) != want { |
| 19 | + t.Fatalf("RenderLines produced %d lines; want %d", len(lines), want) |
| 20 | + } |
| 21 | +} |
| 22 | + |
| 23 | +func TestRenderLinesNoLexerFallback(t *testing.T) { |
| 24 | + src := "first line\nsecond line\nthird" |
| 25 | + lines := RenderLines("unknown.weirdext", src) |
| 26 | + if len(lines) != 3 { |
| 27 | + t.Fatalf("plain fallback produced %d lines; want 3", len(lines)) |
| 28 | + } |
| 29 | + for i, want := range []string{"first line", "second line", "third"} { |
| 30 | + if string(lines[i]) != want { |
| 31 | + t.Errorf("line %d = %q; want %q", i+1, string(lines[i]), want) |
| 32 | + } |
| 33 | + } |
| 34 | +} |
| 35 | + |
| 36 | +func TestRenderLinesEscapesPlainText(t *testing.T) { |
| 37 | + lines := RenderLines("unknown.weirdext", "a < b & c > d") |
| 38 | + if len(lines) != 1 { |
| 39 | + t.Fatalf("got %d lines; want 1", len(lines)) |
| 40 | + } |
| 41 | + got := string(lines[0]) |
| 42 | + for _, want := range []string{"<", "&", ">"} { |
| 43 | + if !strings.Contains(got, want) { |
| 44 | + t.Errorf("plain output %q missing escape %q", got, want) |
| 45 | + } |
| 46 | + } |
| 47 | +} |
| 48 | + |
| 49 | +func TestRenderLinesBridgesMultiLineToken(t *testing.T) { |
| 50 | + // Python triple-quoted string spans 3 lines; chroma emits a single |
| 51 | + // <span class="s2">…</span> for the whole literal. The splitter |
| 52 | + // must close + reopen the span at each line boundary so each row |
| 53 | + // is independently well-formed. |
| 54 | + src := "x = '''line one\nline two\nline three'''\n" |
| 55 | + lines := RenderLines("a.py", src) |
| 56 | + if len(lines) < 3 { |
| 57 | + t.Fatalf("got %d lines; want at least 3", len(lines)) |
| 58 | + } |
| 59 | + // Lines 1, 2, 3 each touch the multi-line string literal; each |
| 60 | + // should both open and close a span tag. |
| 61 | + for _, idx := range []int{0, 1, 2} { |
| 62 | + l := string(lines[idx]) |
| 63 | + opens := strings.Count(l, "<span") |
| 64 | + closes := strings.Count(l, "</span>") |
| 65 | + if opens != closes { |
| 66 | + t.Errorf("line %d: %d <span vs %d </span> — not well-formed: %q", |
| 67 | + idx+1, opens, closes, l) |
| 68 | + } |
| 69 | + } |
| 70 | +} |
| 71 | + |
| 72 | +func TestSplitChromaLinesEmptyInput(t *testing.T) { |
| 73 | + lines := splitChromaLines("") |
| 74 | + if len(lines) != 1 || lines[0] != "" { |
| 75 | + t.Fatalf("splitChromaLines(\"\") = %v; want [\"\"]", lines) |
| 76 | + } |
| 77 | +} |
| 78 | + |
| 79 | +func TestSplitChromaLinesNoSpans(t *testing.T) { |
| 80 | + lines := splitChromaLines("a\nb\nc") |
| 81 | + if len(lines) != 3 { |
| 82 | + t.Fatalf("got %d lines; want 3", len(lines)) |
| 83 | + } |
| 84 | + want := []string{"a", "b", "c"} |
| 85 | + for i, w := range want { |
| 86 | + if string(lines[i]) != w { |
| 87 | + t.Errorf("[%d] = %q; want %q", i, string(lines[i]), w) |
| 88 | + } |
| 89 | + } |
| 90 | +} |
| 91 | + |
| 92 | +func TestLanguageGuess(t *testing.T) { |
| 93 | + cases := []struct{ filename, want string }{ |
| 94 | + {"main.go", "Go"}, |
| 95 | + {"app.py", "Python"}, |
| 96 | + {"index.html", "HTML"}, |
| 97 | + {"unknown.weirdext", "Text"}, |
| 98 | + } |
| 99 | + for _, tc := range cases { |
| 100 | + if got := LanguageGuess(tc.filename); got != tc.want { |
| 101 | + t.Errorf("LanguageGuess(%q) = %q; want %q", tc.filename, got, tc.want) |
| 102 | + } |
| 103 | + } |
| 104 | +} |
