Function assertContains

test/unit-thinking-truncation.mjs:40–44

(actual, substring, message)

}

function assertContains(actual, substring, message) {
    if (!actual.includes(substring)) {
        throw new Error(message || `Expected string to contain ${JSON.stringify(substring)}, got ${JSON.stringify(actual)}`);
    }
}

// ==================== splitLeadingThinkingBlocks 测试 ====================