request.setModelSource(new StringModelSource(BASE1));
        request.setModelResolver(new CycleInImportsResolver());

        assertThrows(ModelBuildingException.class, () -> builder.build(request));
    }

    static class CycleInImportsResolver extends BaseModelResolver {
        @Override
        public ModelSource resolveModel(Dependency dependency) throws UnresolvableModelException {

        maven = container.lookup(Maven.class);

        executionRequestPopulator = container.lookup(MavenExecutionRequestPopulator.class);

        modelProcessor = createModelProcessor(container);

        configurationProcessors = container.lookupMap(ConfigurationProcessor.class);

        toolchainsBuilder = container.lookup(ToolchainsBuilder.class);

        }
    }

    public static class Build {}

    public static class Dependency {
        private String artifactId;

        public String getArtifactId() {
            return artifactId;
        }

        public void setArtifactId(String id) {
            artifactId = id;
        }
    }

    public static class Scm {
        private String connection;

import java.util.function.Function;
import java.util.function.Predicate;

/**
 * This should be removed when https://bugs.openjdk.org/browse/JDK-8323729
 * is released in our minimum JDK.
 */
class ImmutableCollections {

    private static final Map<?, ?> EMPTY_MAP = new AbstractImmutableMap<>() {
        @Override
        public Set<Entry<Object, Object>> entrySet() {
            return new AbstractImmutableSet<>() {

import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 *
 */
class RequirementMatcherFactoryTest {

    /**
     * Test of createExactMatcher method, of class RequirementMatcherFactory.
     */
    @Test
    void testCreateExactMatcher() {
        RequirementMatcher matcher;

    }

    // Mock classes for testing
    private static class MockInvokerRequest {
        private final boolean verbose;

        MockInvokerRequest(boolean verbose) {
            this.verbose = verbose;
        }

        boolean effectiveVerbose() {
            return verbose;
        }
    }

    private static class MockOptions {
        private final boolean quiet;

* 这种方式更适于处理图像、视频、二进制文件等大型文件，好处是不会占用所有内存；
* 可获取上传文件的元数据；
* 自带 <a href="https://docs.python.org/zh-cn/3/glossary.html#term-file-like-object" class="external-link" target="_blank">file-like</a> `async` 接口；
* 暴露的 Python <a href="https://docs.python.org/zh-cn/3/library/tempfile.html#tempfile.SpooledTemporaryFile" class="external-link" target="_blank">`SpooledTemporaryFile`</a> 对象，可直接传递给其他预期「file-like」对象的库。

### `UploadFile`

`UploadFile` 的属性如下：

## A "callable" instance { #a-callable-instance }

In Python there's a way to make an instance of a class a "callable".

Not the class itself (which is already a callable), but an instance of that class.

To do that, we declare a method `__call__`:

{* ../../docs_src/dependencies/tutorial011_an_py39.py hl[12] *}

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