package com.codechecker.cache;

import java.io.IOException;
import java.io.InputStream;
import java.io.UncheckedIOException;
import java.nio.charset.StandardCharsets;
import java.io.ByteArrayOutputStream;

/**
 * 测试通用工具：加载 classpath 下的 fixture 文本。
 */
public final class TestSupport {

    private TestSupport() {
    }

    public static String fixture(String path) {
        try (InputStream in = TestSupport.class.getClassLoader().getResourceAsStream(path)) {
            if (in == null) {
                throw new IllegalArgumentException("fixture 不存在: " + path);
            }
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            byte[] chunk = new byte[8192];
            int read;
            while ((read = in.read(chunk)) != -1) {
                buffer.write(chunk, 0, read);
            }
            return new String(buffer.toByteArray(), StandardCharsets.UTF_8);
        } catch (IOException e) {
            throw new UncheckedIOException(e);
        }
    }
}