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"""Tests related to positioning self.x and self.y on the page.
implemented:
* ln()
to be implemented:
* set_x()
* set_y()
* set_xy()
"""
from pathlib import Path
import math
import pytest
from fpdf import FPDF
# from test.conftest import assert_pdf_equal
HERE = Path(__file__).resolve().parent
# pylint: disable=protected-access
def test_ln_before_text(): # Issue 937
pdf = FPDF()
pdf.add_page()
# no text added yet, ln() uses default font_size
pdf.x += 20
prev_y = pdf.y
pdf.ln()
assert math.isclose(
pdf.y - prev_y, pdf.font_size
), f"ln() before writing text didn't move y by font size ({pdf.y-prev_y} vs. {pdf.font_size})."
assert (
pdf.x == pdf.l_margin
), f"ln() before writing text didn't move x to l_margin ({pdf.x} vs. {pdf.l_margin})."
# changed font size affects amount of movement
pdf.set_font("helvetica", size=36)
pdf.x += 30
prev_y = pdf.y
pdf.ln()
assert math.isclose(
pdf.y - prev_y, pdf.font_size
), f"ln() before writing text didn't move y by font size ({pdf.y-prev_y} vs. {pdf.font_size})."
assert (
pdf.x == pdf.l_margin
), f"ln() before writing text didn't move x to l_margin ({pdf.x} vs. {pdf.l_margin})."
def test_ln_by_h():
pdf = FPDF()
pdf.add_page()
# ln() uses argument h.
pdf.x += 20
prev_y = pdf.y
h = 15.0
pdf.ln(h)
assert math.isclose(
pdf.y - prev_y, h
), f"ln() didn't move y by argument h ({pdf.y-prev_y} vs. {h})."
assert (
pdf.x == pdf.l_margin
), f"ln() with argument h didn't move x to l_margin ({pdf.x} vs. {pdf.l_margin})."
# bad argument h
with pytest.raises(TypeError):
pdf.ln("hello")
def test_ln_by_lasth():
pdf = FPDF()
pdf.add_page()
# ln() uses self._lasth after writing some text.
pdf.set_font("helvetica", size=16)
pdf.x += 20
pdf.cell(text="something")
h = pdf.font_size # last *used* font height, no cell height given
prev_y = pdf.y
pdf.ln(h)
assert math.isclose(
pdf.y - prev_y, pdf._lasth
), f"ln() after cell() didn't move y by font height ({pdf.y-prev_y} vs. {h})."
assert (
pdf.x == pdf.l_margin
), f"ln() after cell() didn't move x to l_margin ({pdf.x} vs. {pdf.l_margin})."
# once we have a self._lasth, changing the font size without writing anything should
# not affect the movement.
pdf.set_font("helvetica", size=36)
prev_y = pdf.y
pdf.ln(h)
assert math.isclose(
pdf.y - prev_y, pdf._lasth
), f"ln() after cell() didn't move y by font height ({pdf.y-prev_y} vs. {h})."
assert (
pdf.x == pdf.l_margin
), f"ln() after cell() didn't move x to l_margin ({pdf.x} vs. {pdf.l_margin})."
# cell(h=x) should set _lasth to that
h = 20
pdf.x += 33
pdf.cell(h=h, text="something")
prev_y = pdf.y
pdf.ln()
assert math.isclose(
pdf.y - prev_y, h
), f"ln() after cell() didn't move y by cell height ({pdf.y-prev_y} vs. {h})."
assert (
pdf.x == pdf.l_margin
), f"ln() after cell() didn't move x to l_margin ({pdf.x} vs. {pdf.l_margin})."
def test_ln_with_zero_h():
pdf = FPDF()
pdf.add_page()
prev_y = pdf.y
# Passing 0(zero) as h
pdf.ln(0)
assert math.isclose(
pdf.y, prev_y
), f"ln() after call with 0 (zero) h parameter moves by y axis ({pdf.y} vs.{prev_y})"
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