[RavSinghChandan]

SVG text with a character that a core font does not have fails with a bare KeyError from the width lookup:

SVGObject('<svg xmlns="http://www.w3.org/2000/svg"><text x="1" y="10">a – b</text></svg>').draw_to_page(pdf)
# KeyError: '–'

The same text in pdf.cell() raises FPDFUnicodeEncodingException: Character "–" at index 2 in text is outside the range of characters supported by the font used: "helvetica". Please consider using a Unicode font. (from normalize_text()). En dashes, € and arrows are common in SVG diagrams.

Text.render() now checks the runs of a core font against its character widths and raises the same exception, with the same font suggestion from suggest_unicode_font_for_error(), before measuring the text.

Added test_svg_text_core_font_unsupported_character, which checks that the message equals the one of cell(); it fails on master. The full test suite passes except test_image_with_explicit_dimensions, which also fails on master in my environment; black, pylint, mypy and pyright pass