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# coding: utf-8
from pix2text.latex_ocr import *
def test_remove_redundant_script():
latex_strs = [
('^ { abc }', 'abc'),
('^ { { a + b } }', '{ a + b }'),
('_ { abc }', 'abc'),
('_ { { a + b } }', '{ a + b }'),
('\\sum _ { t = 1 } ^ { T }', '\\sum _ { t = 1 } ^ { T }'),
]
for ori, res in latex_strs:
assert remove_redundant_script(ori) == res
def test_remove_empty_text():
latex_strs = [
(
'J _ { \\stackrel { \\arraycolsep } { 0 p t } { G } } ^ { }',
'J _ { \\stackrel { \\arraycolsep } { 0 p t } { G } }',
),
('\\hat { }', ''),
('\\hat { } _ { } : h = 0. 5', ': h = 0. 5'),
('\\sum _ { t = 1 } ^ { T }', '\\sum _ { t = 1 } ^ { T }'),
]
for ori, res in latex_strs:
assert remove_empty_text(ori) == res
def test_remove_trailing_whitespace():
latex_strs = [
('abc \\qquad \\qquad \\qquad', 'abc'),
('abc \\qquad \\quad \\qquad', 'abc'),
('abc \\qquad \\ \\quad \\qquad', 'abc'),
('abc \\, \\, \\, \\, \\, \\, \\,', 'abc'),
('f ^ { \\prime } \\ = \\ \\ ', 'f ^ { \\prime } \\ ='),
('\\sum _ { t = 1 } ^ { T }', '\\sum _ { t = 1 } ^ { T }'),
]
for ori, res in latex_strs:
assert remove_trailing_whitespace(ori) == res
def test_remove_unnecessary_spaces():
latex_strs = [
('{ \\cal L }', '{\\cal L}'), # 保留命令后紧跟大写字母的空格
('\\textbf {bold text}', '\\textbf{bold text}'), # 移除命令后的空格
('a + b = c', 'a+b=c'), # 数学模式内的空格被移除
('\\frac{ 1 }{ 2 }', '\\frac{1}{2}'), # 移除大括号内的空格
('\\sum_{ i = 1 }^{ N }', '\\sum_{i=1}^{N}'), # 移除下标和上标中的空格
('\\alpha \\, \\beta', '\\alpha\\, \\beta'), # 保留显式间距调整命令的空格
('\\sqrt { x } + \\sqrt { y }', '\\sqrt{x}+\\sqrt{y}'), # 移除大括号内的空格，保留操作符周围的空格
('\\textit {italic text} with space', '\\textit{italic text} with space'), # 移除命令后的空格，保留文本中的空格
('\\mathrm { a b c }', '\\mathrm{a b c}'), # 移除命令后的空格
('\\sum _ {t=1} ^ {T} 4 _ { 2 }', '\\sum_{t=1}^{T} 4_{2}'),
('\\sim q ( z | x )', '\\sim q ( z | x )'),
]
for ori, res in latex_strs:
assert remove_unnecessary_spaces(ori) == res
def test_fix_latex():
latex_strs = [
('\\left \\frac{1}{2}', '\\frac{1}{2}'),
('\\left ( \\frac{1}{2} + \\left \\frac{1}{2} \\right )', '\\left ( \\frac{1}{2} + \\frac{1}{2} \\right )'),
('\\left( \\frac{1}{2} + \\left \\frac{1}{2} \\right)', '\\left( \\frac{1}{2} + \\frac{1}{2} \\right)'),
]
for ori, res in latex_strs:
assert fix_latex(ori) == res
def test_replace_illegal_symbols():
latex_strs = [
(r'a^2 \.', r'a^2 \ .'),
(r'a^2 \= \.', r'a^2 \ = \ .'),
(r'a^2 \- \.', r'a^2 \ - \ .'),
(r'a^2 \~ \.', r'a^2 \ ~ \ .'),
]
for ori, res in latex_strs:
assert replace_illegal_symbols(ori) == res |