import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;

import com.google.common.collect.SetMultimap;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;
import com.google.common.testing.EqualsTester;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import okhttp3.Protocol
import okhttp3.RecordingEventListener
import okhttp3.RecordingHostnameVerifier
import okhttp3.Request
import okhttp3.RequestBody.Companion.toRequestBody
import okhttp3.internal.duplex.MockSocketHandler
import okhttp3.testing.PlatformRule
import okio.ProtocolException
import okio.buffer
import okio.use
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.RegisterExtension

import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.ArgumentCaptor;
import org.mockito.Mock;
import org.mockito.MockedStatic;

Now modify the file `main.py` to receive a body from a `PUT` request.

Declare the body using standard Python types, thanks to Pydantic.

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")

import com.google.common.collect.testing.testers.MapRemoveTester;
import com.google.common.collect.testing.testers.MapSerializationTester;
import com.google.common.collect.testing.testers.MapSizeTester;
import com.google.common.collect.testing.testers.MapToStringTester;
import com.google.common.testing.SerializableTester;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Map;

import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.DoubleBuffer;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.nio.LongBuffer;
import java.nio.ShortBuffer;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.Collection;
import java.util.Comparator;
import java.util.Currency;
import java.util.Deque;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.UUID;
import java.util.function.Supplier;
import java.util.stream.Collectors;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.fess.Constants;
import org.codelibs.fess.app.web.api.ApiResult;

package util

import common.BuildToolBuildJvm
import common.Os
import common.VersionedSettingsBranch
import common.javaHome
import common.requiresOs
import common.toCapitalized
import jetbrains.buildServer.configs.kotlin.AbsoluteId
import jetbrains.buildServer.configs.kotlin.BuildType
import jetbrains.buildServer.configs.kotlin.ParameterDisplay
import jetbrains.buildServer.configs.kotlin.buildSteps.exec

  "INVISIBLE_REFERENCE",
)

package okhttp3

import assertk.assertThat
import assertk.assertions.containsExactly
import assertk.assertions.hasMessage
import assertk.assertions.isEqualTo
import assertk.assertions.isIn
import java.io.IOException
import java.net.InetSocketAddress
import java.net.UnknownHostException
import java.time.Duration
import java.util.Arrays
import java.util.concurrent.TimeUnit