R testthat不报告失败或错误

Question

我使用 testthat 发现了一些奇怪的结果。当运行ning test_file 时，会发现个别 test_that 调用，但除了上下文名称之外没有输出到控制台，并且返回的 data.frame 没有预期的结果结果。我怀疑我正在做一些非常愚蠢的事情，但是尝试了很多替代方法并得到了相同的结果。

这是我的 tests.r 文件：

context("The context")

test_that('should pass',function(){
    expect_equal(42,42)
})

test_that('should fail',function(){
    expect_equal(43,42)
})

test_that('should error',function(){
    stop()
})

我运行test_file就可以了：

> require(testthat)
Loading required package: testthat
> test_file('tests.r')
The context : 

> results <- test_file('tests.r')
The context : 

> results
     file     context         test nb failed error user system  real
1 tests.r The context  should pass  0      0 FALSE    0      0 0.002
2 tests.r The context  should fail  0      0 FALSE    0      0 0.001
3 tests.r The context should error  0      0 FALSE    0      0 0.001

如您所见，没有控制台输出和结果 data.frame 而不是一次失败的测试和一次错误的测试，看起来好像一切都通过了。

当我直接在控制台中运行函数体时，我得到了预期的结果：

> expect_equal(42,42)
> expect_equal(43,42)
Error: 43 not equal to 42
Mean relative difference: 0.02380952
> stop()
Error:

这就是我运行宁:

> sessionInfo()
R version 3.1.2 (2014-10-31)
Platform: x86_64-pc-linux-gnu (64-bit)

locale:
 [1] LC_CTYPE=en_NZ.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=en_NZ.UTF-8        LC_COLLATE=en_NZ.UTF-8    
 [5] LC_MONETARY=en_NZ.UTF-8    LC_MESSAGES=en_NZ.UTF-8   
 [7] LC_PAPER=en_NZ.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=en_NZ.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] testthat_0.9.1

怀疑我的安装可能有问题或其他原因，我在 Ubuntu Trusty/R 3.12 和 Windows 7/R 3.11 上尝试了相同的测试并得到了相同的结果。我一定是在做蠢事！

当我使用 Runit 编写类似测试时：

test.should_pass <- function(){
    checkEquals(42,42)
}

test.should_fail <- function(){
    checkEquals(43,42)
}

test.should_error <- function(){
    stop()
}

我得到了预期的输出和结果：

> results <- runTestFile('tests.r')


Executing test function test.should_error  ... Timing stopped at: 0 0 0 
Error in func() : 
    done successfully.



Executing test function test.should_fail  ... Timing stopped at: 0 0 0.001 
Error in checkEquals(43, 42) : Mean relative difference: 0.02325581
done successfully.



Executing test function test.should_pass  ...  done successfully.

> results
Number of test functions: 3 
Number of errors: 1 
Number of failures: 1

Answer 1

在您的 testthat 测试中，您声明了一个匿名函数，如下所示：

function() {
  expect_equal(43,42)
}

运行这段代码。有没有实际执行的东西？不，因为您已经给出了您不调用的函数声明。现在运行

{expect_equal(43,42)}

这是一段代码，不是函数。

将您的测试文件更改为

context("The context")

test_that('should pass', {
  expect_equal(42,42)
})

test_that('should fail', {
  expect_equal(43,42)
})

test_that('should error', {
  stop()
})

产量

The context : .12


1. Failure(@test.R#8): should fail -----------------------------------------------------------------------------------------------------------------------------------
43 not equal to 42
Mean relative difference: 0.02380952

2. Error: should error -----------------------------------------------------------------------------------------------------------------------------------------------

1: withCallingHandlers(eval(code, new_test_environment), error = capture_calls)
2: eval(code, new_test_environment)
3: eval(expr, envir, enclos)
4: stop() at test.R:12

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