Add Linkki broadcast image

linkki-tiedotus/tests/test_formatting.py

@@ -0,0 +1,125 @@
+from linkki_poster.formatting import (
+    CAPTION_LIMIT,
+    estimate_caption_length,
+    parse_markdown_template,
+    render_preview_html,
+    render_template,
+    validate_markdown_syntax,
+)
+from linkki_poster.models import Language
+
+
+def test_markdown_subset_and_placeholder_rendering() -> None:
+    raw = (
+        "# title\n"
+        "**bold** _italic_ ++under++ ~~strike~~ ||spoil|| `code` [site](https://example.com)\n"
+        "Go [English](en) and [Finnish](fi)\n"
+    )
+    parsed = parse_markdown_template(raw)
+
+    unresolved = render_template(parsed, {})
+    assert "<b>TITLE</b>" in unresolved
+    assert "<b>bold</b>" in unresolved
+    assert "<i>italic</i>" in unresolved
+    assert "<u>under</u>" in unresolved
+    assert "<s>strike</s>" in unresolved
+    assert "<tg-spoiler>spoil</tg-spoiler>" in unresolved
+    assert "<code>code</code>" in unresolved
+    assert '<a href="https://example.com">site</a>' in unresolved
+    assert "English" in unresolved
+    assert "Finnish" in unresolved
+    assert 'href="https://t.me/' not in unresolved
+
+    resolved = render_template(
+        parsed,
+        {
+            Language.EN: "https://t.me/testchan/123",
+            Language.FI: "https://t.me/testchan/456",
+        },
+    )
+    assert '<a href="https://t.me/testchan/123">English</a>' in resolved
+    assert '<a href="https://t.me/testchan/456">Finnish</a>' in resolved
+
+
+def test_caption_length_estimate_uses_worst_case_links() -> None:
+    parsed = parse_markdown_template("[EN](en) " * 80)
+    assert estimate_caption_length(parsed, "channel") > CAPTION_LIMIT
+
+
+def test_multiline_spoiler_is_supported() -> None:
+    parsed = parse_markdown_template("||line1\n\nline2||")
+    rendered = render_template(parsed, {})
+    assert "<tg-spoiler>line1\n\nline2</tg-spoiler>" in rendered
+
+
+def test_validate_markdown_syntax_finds_unclosed_markers() -> None:
+    issues = validate_markdown_syntax("Can we do **[bold links](fi)")
+    messages = [issue.message for issue in issues]
+    assert any("**" in message for message in messages)
+
+
+def test_lists_and_blockquotes_are_rendered_for_telegram_html() -> None:
+    parsed = parse_markdown_template(
+        "- item\n"
+        "  - nested\n"
+        "1. first\n"
+        "  1. nested first\n"
+        "> quoted\n"
+        "> text\n"
+    )
+    rendered = render_template(parsed, {})
+    assert "• item" in rendered
+    assert "\u00a0\u00a0\u00a0\u00a0• nested" in rendered
+    assert "1. first" in rendered
+    assert "\u00a0\u00a0\u00a0\u00a01. nested first" in rendered
+    assert "<blockquote>quoted\ntext</blockquote>" in rendered
+
+
+def test_escaped_list_markers_and_heading_markers_stay_literal() -> None:
+    parsed = parse_markdown_template("\\* not a list\n1\\. not numbered\n\\# not a heading")
+    rendered = render_template(parsed, {})
+    assert "* not a list" in rendered
+    assert "1. not numbered" in rendered
+    assert "# not a heading" in rendered
+
+
+def test_escaped_backticks_and_link_brackets_stay_literal() -> None:
+    parsed = parse_markdown_template(
+        r"test \`code` test" "\n"
+        r"\```" "\n"
+        "code\n"
+        "```\n"
+        r"\[label\]\(url\)"
+    )
+    rendered = render_template(parsed, {})
+    assert r"test `code` test" in rendered
+    assert "<code>code</code>" not in rendered
+    assert "<pre><code>" not in rendered
+    assert "[label](url)" in rendered
+
+
+def test_escaped_cross_language_link_stays_literal() -> None:
+    parsed = parse_markdown_template(r"\[English](en)")
+    rendered = render_template(parsed, {Language.EN: "https://t.me/test/123"})
+    assert "[English](en)" in rendered
+    assert 'href="https://t.me/test/123"' not in rendered
+
+
+def test_preview_renders_fake_links_for_available_targets() -> None:
+    preview = render_preview_html("[English](en) [Finnish](fi)", {Language.EN})
+    assert '<a href="#en">English</a>' in preview
+    assert "Finnish" in preview
+    assert 'href="#fi"' not in preview
+
+
+def test_apostrophes_are_not_escaped_in_headings_or_plain_text() -> None:
+    heading = render_template(parse_markdown_template("#THERE'S"), {})
+    plain_heading_char = render_template(parse_markdown_template("#'"), {})
+    bold = render_template(parse_markdown_template("**THERE'S**"), {})
+
+    assert "<b>THERE'S</b>" in heading
+    assert "<b>'</b>" in plain_heading_char
+    assert "<b>THERE'S</b>" in bold
+    assert "&#x27;" not in heading
+    assert "&#x27;" not in plain_heading_char
+    assert "&#x27;" not in bold