【发布时间】：2021-11-18 08:15:00
【问题描述】：
当 Xcode 在 WatchOS 测试执行期间崩溃时，代码 9 意味着什么（以及如何解决该问题）？
场景：
我有一个 XCTestCase 可以读取大约 100 个 CSV 测试资源文件。这些文件以逗号分隔，大约有 6,000 行，平均大小为 64K。在我的测试用例中，我将这些文件读入内存，其中一个是我的，我验证输入文件（经过一些处理）与输出文件匹配。下面是一些演示流程的代码：
import XCTest
@testable import MyWatch_Extension
class MyTest: XCTestCase {
func testMyAlgo() throws {
let testingData = discoverAvailableTestFiles(filter: "dataset_1");
XCTAssertGreaterThan(testingData.count, 0, "have data to process")
for (_, testingEntry) in testingData.enumerated() {
var input : [Double] = [];
var expectations : [Double] = [];
readInputOutputTestData(entries: &input, fileName: testingEntry + "_input");
readInputOutputTestData(entries: &expectations, fileName: testingEntry + "_expected_output");
// do something with the input, and store it into results
let results = MyAglo().doSomething();
compareResultsAndExpectations(testingEntry: testingEntry, results: results, expectations: expectations);
}
}
func discoverAvailableTestFiles(filter: String) -> Set<String> {
let bundle = Bundle(for: type(of: self))
let paths = bundle.paths(forResourcesOfType: "csv", inDirectory: nil);
var results = Set<String>()
for path in paths {
if (path.contains(filter)) {
let fileNameSubstring = path[path.index(path.lastIndex(of: "/")!, offsetBy: 1)...]
let qaFileName = fileNameSubstring[...fileNameSubstring.index(fileNameSubstring.lastIndex(of: "_")!, offsetBy: -1)]
results.insert(String(qaFileName))
}
}
return results;
}
func readInputOutputTestData(entries : inout [Double], fileName : String) {
let bundle = Bundle(for: type(of: self))
let path = bundle.path(forResource: fileName, ofType: "csv")!
do {
let data = try String(contentsOfFile: path, encoding: .utf8)
let myStrings = data.components(separatedBy: .newlines);
for idx in 0..<myStrings.count {
let parts = myStrings[idx].split(separator: ",");
if (parts.count > 0) {
for part in parts {
entries.append((part as NSString).doubleValue);
}
}
}
} catch {
print(error)
}
}
func compareResultsAndExpectations(testingEntry: String, results: [Double], expectations: [Double]) {
print("## testing \(testingEntry)");
XCTAssertEqual(results.count, expectations.count / 3, "mismatch in data count \(testingEntry)")
var counter = 0;
for idx in stride(from: 0, to: expectations.count, by: 3) {
XCTAssertEqual(results[counter], expectations[idx], accuracy: 0.5, "\(idx + 1) value mismatch")
counter += 1;
}
}
}
当我执行 testMyAlgo 测试用例时，我可能会读取前 20 个文件，并收到错误消息：
The test runner exited with code 9 before finishing running tests.
如果我单独或小批量运行每个文件（可能只有 20 个，而不是 100 的整个循环），一切都很好。这让我相信我正在耗尽手表的内存空间，或者应该以不同的方式执行测试用例。知道问题是什么，或者我应该如何重新构建测试用例以摆脱这个错误？ （在每个测试用例之前可能有免费资源或类似的东西）
【问题讨论】：