Show evaluated test arguments for set/char/numeric comparison functions

stdlib/Test/src/Test.jl

@@ -30,15 +30,40 @@ using InteractiveUtils: gen_call_with_extracted_types
 using Base: typesplit, remove_linenums!
 using Serialization: Serialization
 
+# Whitelist boolean functions which show their evaluated arguments when the test fails
 const DISPLAY_FAILED = (
-    :isequal,
-    :isapprox,
     :≈,
-    :occursin,
-    :startswith,
+    :contains,
     :endswith,
+    :isapprox,
+    :isascii,
+    :iscntrl,
+    :isdigit,
+    :isdisjoint,
+    :isletter,
+    :islowercase,
     :isempty,
-    :contains
+    :isequal,
+    :isfinite,
+    :isinf,
+    :isinteger,
+    :ismissing,
+    :isnothing,
+    :isnumeric,
+    :isprint,
+    :ispunct,
+    :isnan,
+    :isone,
+    :isreal,
+    :issetequal,
+    :isspace,
+    :issubset,
+    :isuppercase,
+    :isvalid,
+    :isxdigit,
+    :iszero,
+    :occursin,
+    :startswith,
 )
 
 const FAIL_FAST = Ref{Bool}(false)
@@ -1623,6 +1648,7 @@ julia> @testset let logi = log(im)
        end
 Test Failed at none:3
   Expression: !(iszero(real(logi)))
+   Evaluated: !(iszero(0.0))
      Context: logi = 0.0 + 1.5707963267948966im
 
 ERROR: There was an error during testing

stdlib/Test/test/runtests.jl

@@ -163,6 +163,10 @@ let fails = @testset NoThrowTestSet begin
         @test_throws r"sqrt\([Cc]omplx" sqrt(-1)
         @test_throws str->occursin("a T", str) error("a test")
         @test_throws ["BoundsError", "acquire", "1-element", "at index [2]"] [1][2]
+        # 27 - Fail - issetequal
+        a = [1, 2]
+        b = [1, 3]
+        @test issetequal(a, b)
     end
     for fail in fails
         @test fail isa Test.Fail
@@ -298,6 +302,11 @@ let fails = @testset NoThrowTestSet begin
         @test occursin(r"Message: \"BoundsError.* 1-element.*at index \[2\]", str)
     end
 
+    let str = sprint(show, fails[27])
+        @test occursin("Expression: issetequal(a, b)", str)
+        @test occursin("Evaluated: issetequal([1, 2], [1, 3])", str)
+    end
+
 end
 
 struct BadError <: Exception end