# 進階使用者指南 { #advanced-user-guide }

## 更多功能 { #additional-features }

主要的[教學 - 使用者指南](../tutorial/index.md) 應足以帶你快速瀏覽 **FastAPI** 的所有核心功能。

在接下來的章節中，你會看到其他選項、設定，以及更多功能。

/// tip

接下來的章節**不一定是「進階」**。

而且對於你的使用情境，解法很可能就在其中某一節。

///

## 先閱讀教學 { #read-the-tutorial-first }

只要掌握主要[教學 - 使用者指南](../tutorial/index.md) 的內容，你就能使用 **FastAPI** 的大多數功能。

import static java.util.Arrays.asList;

import com.google.common.base.Function;
import com.google.common.collect.Multiset.Entry;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.google.SortedMultisetTestSuiteBuilder;
import com.google.common.collect.testing.google.TestStringMultisetGenerator;

# About FastAPI versions { #about-fastapi-versions }

**FastAPI** is already being used in production in many applications and systems. And the test coverage is kept at 100%. But its development is still moving quickly.

New features are added frequently, bugs are fixed regularly, and the code is still continuously improving.

import com.google.common.collect.ImmutableSortedMap;
import com.google.common.collect.Ordering;
import com.google.common.collect.Sets;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.testing.SerializableTester;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;

package com.google.common.collect.testing.google;

import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ADD;
import static com.google.common.collect.testing.google.ReflectionFreeAssertThrows.assertThrows;
import static java.util.Arrays.asList;

import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.testing.features.CollectionFeature;
import java.util.Collections;
import org.junit.Ignore;

/**

import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ADD;
import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE;
import static com.google.common.collect.testing.features.CollectionSize.ONE;
import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
import static com.google.common.collect.testing.features.CollectionSize.ZERO;

@com.google.errorprone.annotations.CheckReturnValue

    }

    @Test
    void testOpenConnection_HttpProtocol_ReturnsNtlmHttpURLConnection() throws Exception {
        // This test ensures that for a standard HTTP URL, openConnection wraps the connection
        // in an NtlmHttpURLConnection, using mock handlers to avoid dependency on system handlers.
        setupMockProtocolHandlers();

        // Act
        String actual = blob.toString();

        // Assert
        assertEquals(expected, actual, "Hex string should match expected format");
    }

    // Ensures a default-constructed blob starts empty and stable across APIs
    @Test
    @DisplayName("Default constructor yields empty state")
    void defaultConstructor_initialState() {
        // Arrange & Act

* `feature`: Features
    * New features, adding support for things that didn't exist before.
* `bug`: Fixes