smillmorel
d5ac3fca7e
Collection of engineering calculation projects (Python + Typst), each with input, calc script, tests, results, and generated PDF where available.
92 lines
3.3 KiB
Python
92 lines
3.3 KiB
Python
from pathlib import Path
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import importlib.util
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import json
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import subprocess
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import sys
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import pytest
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import yaml
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HERE = Path(__file__).resolve().parent
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spec = importlib.util.spec_from_file_location("steel_beam_calc", HERE / "calc.py")
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assert spec is not None and spec.loader is not None
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module = importlib.util.module_from_spec(spec)
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spec.loader.exec_module(module)
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def result():
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with (HERE / "input.yaml").open(encoding="utf-8") as handle:
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return module.compute(yaml.safe_load(handle))
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def test_typst_load_demands_match_checked_inputs():
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subprocess.run([sys.executable, str(HERE / "calc.py")], check=True, cwd=HERE.parents[1])
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query = subprocess.run(
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[
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"typst", "eval", "query(<load-demands>)", "--root", ".",
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"--in", "calcs/steel-beam/steel-beam.typ", "--format", "json",
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],
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check=True,
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capture_output=True,
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text=True,
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cwd=HERE.parents[1],
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)
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published = json.loads(query.stdout)
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assert len(published) == 1
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derived = published[0]["value"]
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values = result()["values"]
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assert derived["Mu_kipft"] == pytest.approx(values["moment_kipft"], abs=0.001)
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assert derived["Vu_kip"] == pytest.approx(values["shear_kip"], abs=0.001)
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def test_ground_truth_section_properties():
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values = result()["values"]
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assert values["section_d"] == pytest.approx(5.875)
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assert values["section_A"] == pytest.approx(2.52)
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assert values["section_Sx"] == pytest.approx(5.1)
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assert values["section_Zx"] == pytest.approx(5.73)
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assert values["section_rts"] == pytest.approx(1.05)
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def test_ground_truth_demands_and_flexure():
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output = result()
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values = output["values"]
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assert values["point_load_lbf"] == pytest.approx(7500)
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assert values["moment_kipft"] == pytest.approx(9.375)
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assert values["shear_kip"] == pytest.approx(3.75)
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assert values["Lp_in"] == pytest.approx(37.7, abs=0.1)
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assert values["Lr_ft"] == pytest.approx(9.48, abs=0.01)
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assert values["Fcr_ksi"] == pytest.approx(99.57, abs=0.25)
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assert values["Mp_kipft"] == pytest.approx(23.875)
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assert values["MnLTB_kipft"] == pytest.approx(21.235, abs=0.01)
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assert values["phiMn_kipft"] == pytest.approx(19.1, abs=0.1)
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assert output["checks"]["flexure"]["ok"] is True
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def test_ground_truth_shear_and_deflection():
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output = result()
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values = output["values"]
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assert values["Aw_in2"] == pytest.approx(1.102, abs=0.001)
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assert values["Cv1"] == pytest.approx(1)
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assert values["phiVn_kip"] == pytest.approx(33.047, abs=0.1)
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assert values["delta_limit_in"] == pytest.approx(0.25)
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assert values["delta_in"] == pytest.approx(0.078, abs=0.001)
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assert all(output["checks"][name]["ok"] for name in ("shear", "deflection"))
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def test_invalid_section_is_rejected():
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with pytest.raises(ValueError, match="not found"):
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module.compute({**yaml.safe_load((HERE / "input.yaml").read_text()), "section": "W0X0"})
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def test_cli_can_write_json_to_stdout():
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completed = subprocess.run(
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[sys.executable, str(HERE / "calc.py"), "--input", str(HERE / "input.yaml"), "--stdout"],
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check=True,
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capture_output=True,
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text=True,
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)
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output = json.loads(completed.stdout)
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assert output["section"] == "W6X8.5"
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assert output["values"]["moment_kipft"] == pytest.approx(9.375)
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assert completed.stderr == ""
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