PowerShell如何从测试报告文本中提取指定行末尾数值存入变量？

完整修改后脚本 #

# 取最新的目标测试报告文件
$file = Get-ChildItem -Path $reportDir -Include "$reportName.$fileformat" -Recurse | Sort-Object LastAccessTime | Select-Object -Last 1

# 提取Number of test steps末尾数值
$testStepCount = (Get-Content $file.FullName | Select-String -Pattern "Number of test steps").Line -replace '.*\s+(\d+)\s*$','$1'
# 提取Failed TestStep Count末尾数值
$failStepCount = (Get-Content $file.FullName | Select-String -Pattern "Failed TestStep Count").Line -replace '.*\s+(\d+)\s*$','$1'

# 输出自定义JSON，使用here-string格式无需手动转义双引号
Write-Host @"
{
    "operation": "$environment",
    "status": "OK",
    "ProjectName": "$project",
    "TestSuit": "$testSuite",   
    "TestCase": "$testCase",
    "TestStep": "$testStepCount",
    "FailStep": "$failStepCount",
    "Coverage": "$value"
}
"@

核心修改说明 #

• 优化文件获取逻辑：Get-ChildItem匹配到多个文件时会返回数组，追加Select-Object -Last 1取最新访问时间的单份报告，避免后续读取文件报错
• 数值提取逻辑：用-replace配合正则捕获行末尾的数字：
  • 正则.*\s+(\d+)\s*$的含义是：匹配任意字符直到最后一段空白符，捕获后面连续的数字作为分组1，忽略行尾多余空白
  • 替换为$1直接取捕获到的数字，即可得到目标数值
• 如需避免变量包含特殊字符导致JSON格式错误，可以改用PowerShell内置对象转JSON的方案，兼容性更强：

$outputObj = [PSCustomObject]@{
    operation = $environment
    status = "OK"
    ProjectName = $project
    TestSuit = $testSuite
    TestCase = $testCase
    TestStep = $testStepCount
    FailStep = $failStepCount
    Coverage = $value
}
Write-Host ($outputObj | ConvertTo-Json -Depth 10)

内容的提问来源于stack exchange，提问作者IraIra25