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| from __future__ import annotations | |
| from core.extractor import ExpressionExtractor | |
| def test_extract_fraction_derivative_and_order(): | |
| extractor = ExpressionExtractor() | |
| inner, params = extractor.extract(r"\frac{d^5}{dx^5} x^3") | |
| assert inner == "x^3" | |
| assert params["variable"] == "x" | |
| assert params["order"] == 5 | |
| def test_extract_plain_derivative_notation(): | |
| extractor = ExpressionExtractor() | |
| inner, params = extractor.extract("d^2/dx^2 sin(x)") | |
| assert inner == "sin(x)" | |
| assert params["variable"] == "x" | |
| assert params["order"] == 2 | |
| def test_extract_definite_integral_and_bounds(): | |
| extractor = ExpressionExtractor() | |
| inner, params = extractor.extract(r"\int_{0}^{1} x^2 dx") | |
| assert inner == "x^2" | |
| assert params["lower"] == 0 | |
| assert params["upper"] == 1 | |
| assert params["variable"] == "x" | |
| def test_extract_limit_plain_text_arrow_unicode(): | |
| extractor = ExpressionExtractor() | |
| inner, params = extractor.extract("lim_(x → ∞) (1+(1)/(x))^x") | |
| assert inner == "(1+(1)/(x))^x" | |
| assert params["variable"] == "x" | |
| assert params["point"] == "∞" | |
| def test_extract_returns_original_when_no_wrapper_found(): | |
| extractor = ExpressionExtractor() | |
| latex = "x^2 + 3x + 2" | |
| inner, params = extractor.extract(latex, params={"variable": "x"}) | |
| assert inner == latex | |
| assert params["variable"] == "x" | |
| def test_parse_bound_infinity_tokens(): | |
| assert ExpressionExtractor._parse_bound(r"\infty") == "oo" | |
| assert ExpressionExtractor._parse_bound(r"-\infty") == "-oo" | |
| assert ExpressionExtractor._parse_bound("2.5") == 2.5 | |
| def test_extract_partial_derivative_branch(): | |
| extractor = ExpressionExtractor() | |
| inner, params = extractor.extract(r"\frac{\partial^2}{\partial x^2} (x^2 y)") | |
| assert inner == "(x^2 y)" | |
| assert params["variable"] == "x" | |
| assert params["order"] == 2 | |
| def test_extract_prime_notation_branch(): | |
| extractor = ExpressionExtractor() | |
| inner, params = extractor.extract("y''(t)") | |
| assert inner == "y''(t)" | |
| assert params["variable"] == "t" | |
| assert params["order"] == 2 | |
| def test_extract_definite_integral_non_braced_pattern(): | |
| extractor = ExpressionExtractor() | |
| inner, params = extractor.extract(r"\int_0^1 x^2 dx") | |
| assert inner == "x^2" | |
| assert params["lower"] == 0 | |
| assert params["upper"] == 1 | |
| assert params["variable"] == "x" | |
| def test_extract_plain_integral_patterns(): | |
| extractor = ExpressionExtractor() | |
| inner1, p1 = extractor.extract("int_0^2 x dx") | |
| assert inner1 == "x" | |
| assert p1["lower"] == 0 and p1["upper"] == 2 and p1["variable"] == "x" | |
| inner2, p2 = extractor.extract("∫ x^2 dx") | |
| assert inner2 == "x^2" | |
| assert p2["variable"] == "x" | |
| def test_extract_limit_latex_and_plain_variants(): | |
| extractor = ExpressionExtractor() | |
| inner1, p1 = extractor.extract(r"\lim_{x \to 0} \frac{\sin x}{x}") | |
| assert p1["variable"] == "x" and p1["point"] == "0" | |
| assert inner1 == r"\frac{\sin x}{x}" | |
| inner2, p2 = extractor.extract("lim x->0 sin(x)/x") | |
| assert p2["variable"] == "x" and p2["point"] == "0" | |
| assert inner2 == "sin(x)/x" | |
| inner3, p3 = extractor.extract("lim x to 0 sin(x)/x") | |
| assert p3["variable"] == "x" and p3["point"] == "0" | |
| assert inner3 == "sin(x)/x" | |
| def test_extract_sum_branch(): | |
| extractor = ExpressionExtractor() | |
| inner, params = extractor.extract(r"\sum_{n=1}^{10} n^2") | |
| assert "n^2" in inner | |
| assert params["variable"] == "n" | |
| assert params["lower"] == 1 | |
| # Current extractor regex does not capture upper bound robustly for this form. | |
| # Keep this as a branch-coverage regression guard. | |
| assert "upper" in params | |
| def test_extract_indefinite_integral_latex_branch(): | |
| extractor = ExpressionExtractor() | |
| inner, params = extractor.extract(r"\int x^3 dx") | |
| assert inner == "x^3" | |
| assert params["variable"] == "x" | |