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DjaPyDjaPy
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Adds server calculates.
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Diff for: ‎main.py

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import operator
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from fastapi import FastAPI
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from pydantic import BaseModel, Field
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MAP_OPERATOR = {
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'+': operator.add,
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'-': operator.sub,
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'*': operator.mul,
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'/': operator.truediv,
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'^': operator.pow,
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}
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app = FastAPI()
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class CalcRequestSchema(BaseModel):
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number_1: int = Field(gt=0, description='First number of an algebraic expression')
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number_2: int = Field(ge=0, description='Second number of an algebraic expression')
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operator: str = Field(max_length=1, )
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class CalcResponseSchema(BaseModel):
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result: int = Field(gt=0)
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@app.post('/calc', response_model=CalcResponseSchema)
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def calculate(request: CalcRequestSchema) -> CalcResponseSchema:
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result = MAP_OPERATOR[request.operator](request.number_1, request.number_2)
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return CalcResponseSchema(result=result)

Diff for: ‎requirements.txt

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fastapi~=0.63.0
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uvicorn~=0.13.4
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requests~=2.25.1
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pytest~=6.2.2
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pydantic~=1.8.1

Diff for: ‎test_calc.py

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import pytest
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from fastapi.testclient import TestClient
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from pydantic import ValidationError
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from main import app, CalcRequestSchema, CalcResponseSchema
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client = TestClient(app)
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@pytest.mark.parametrize(
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'number_1, number_2, operator, result',
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[
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(1, 1, '+', 2),
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(2, 3, '*', 6),
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(123, 101, '-', 22),
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(5, 2, '^', 25),
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]
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)
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def test_calc(number_1, number_2, operator, result):
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response = client.post(
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'/calc',
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CalcRequestSchema(
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number_1=number_1,
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number_2=number_2,
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operator=operator).json(),
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)
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assert response.status_code == 200
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assert response.json() == CalcResponseSchema(result=result).dict()
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@pytest.mark.parametrize(
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'number_1, number_2, operator, result',
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[
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(-1, 1, '+', 2),
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(2, -3, '*', 6),
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(10, 101, '-', 22),
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(0, 2, '^', 25),
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]
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)
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def test_calc_value_error(number_1, number_2, operator, result):
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with pytest.raises(ValidationError):
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client.post(
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'/calc',
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CalcRequestSchema(
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number_1=number_1,
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number_2=number_2,
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operator=operator).json(),
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)

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