expect_equal() and bang-bang

[krlmlr]

expands the vectors during reporting. Tested with 1d04028.

library(testthat)

expect_equal(letters[1:2], LETTERS[1:2])
#> Error: letters[1:2] not equal to LETTERS[1:2].
#> 2/2 mismatches
#> x[1]: "a"
#> y[1]: "A"
#> 
#> x[2]: "b"
#> y[2]: "B"
expect_equal(letters[1:2], !!LETTERS[1:2])
#> Error: letters[1:2] not equal to "A".
#> 2/2 mismatches
#> x[1]: "a"
#> y[1]: "A"
#> 
#> x[2]: "b"
#> y[2]: "B"
#> letters[1:2] not equal to "B".
#> 2/2 mismatches
#> x[1]: "a"
#> y[1]: "A"
#> 
#> x[2]: "b"
#> y[2]: "B"
expect_equal(!!letters[1:2], LETTERS[1:2])
#> Error: "a" not equal to LETTERS[1:2].
#> 2/2 mismatches
#> x[1]: "a"
#> y[1]: "A"
#> 
#> x[2]: "b"
#> y[2]: "B"
#> "b" not equal to LETTERS[1:2].
#> 2/2 mismatches
#> x[1]: "a"
#> y[1]: "A"
#> 
#> x[2]: "b"
#> y[2]: "B"
expect_equal(!!letters[1:2], !!LETTERS[1:2])
#> Error: "a" not equal to "A".
#> 2/2 mismatches
#> x[1]: "a"
#> y[1]: "A"
#> 
#> x[2]: "b"
#> y[2]: "B"
#> "b" not equal to "B".
#> 2/2 mismatches
#> x[1]: "a"
#> y[1]: "A"
#> 
#> x[2]: "b"
#> y[2]: "B"

^{Created on 2019-08-27 by the reprex package (v0.3.0)}