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python_charts/tests/test_plot.py
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Python

import matplotlib
matplotlib.use("Agg")
import os
import sys
import pandas as pd
sys.path.append(os.path.abspath("."))
from scripts.lagged_oil_unrate_chart_styled import plot_lagged
from scripts.custom_chart import plot_series, main as custom_main
def test_plot_lagged_returns_figure():
dates = pd.date_range("2000-01-01", periods=5, freq="M")
unrate = pd.DataFrame({"value": [5, 6, 7, 5, 4]}, index=dates)
oil = pd.DataFrame({"value": [20, 25, 30, 35, 40]}, index=dates)
fig = plot_lagged(unrate, oil, 1, dates[0], dates[-1], 0)
assert len(fig.axes) == 2
assert any(ax.get_lines() for ax in fig.axes)
def test_plot_series_and_main():
dates = pd.date_range("2020-01-01", periods=3, freq="D")
df = pd.DataFrame({"A": [1, 2, 3], "B": [4, 5, 6]}, index=dates)
fig = plot_series(df)
assert len(fig.axes) == 1
assert any(fig.axes[0].get_lines())
fig2 = custom_main(
[
"--series",
"UNRATE",
"DCOILWTICO",
"--start",
"2020-01-01",
"--end",
"2020-03-01",
"--db",
"data/fred.db",
]
)
assert len(fig2.axes) == 1
assert any(fig2.axes[0].get_lines())