Testing the result of a method for custom type

[karlwessel]

I tried to test the result of a method for a custom type. But the test errored with

Failed to show value:

MethodError: no method matching show(::IOContext{IOBuffer}, ::MIME{Symbol("text/html")}, ::Main.workspace17.A)

Closest candidates are:

show(::IO, ::M, !Matched::PlutoTest.Show{M}) where M<:MIME at /home/karl/.julia/packages/PlutoTest/y8rEN/src/notebook.jl:1051

show(::IO, !Matched::AbstractString, ::Any) at multimedia.jl:111

show(::IO, !Matched::MIME{Symbol("text/plain")}, ::Any) at multimedia.jl:47

...

print(::HypertextLiteral.EscapeProxy{IOContext{IOBuffer}}, ::HypertextLiteral.Render{Main.workspace17.A})@primitives.jl:52
(::HypertextLiteral.var"#7#8"{Vector{Any}})(::HypertextLiteral.EscapeProxy{IOContext{IOBuffer}})@convert.jl:86
print(::HypertextLiteral.EscapeProxy{IOContext{IOBuffer}}, ::HypertextLiteral.Reprint)@primitives.jl:51
(::HypertextLiteral.var"#1#2"{Tuple{HypertextLiteral.Bypass{String}, HypertextLiteral.Reprint, HypertextLiteral.Bypass{String}}})(::HypertextLiteral.EscapeProxy{IOContext{IOBuffer}})@macro.jl:52
print(::HypertextLiteral.EscapeProxy{IOContext{IOBuffer}}, ::HypertextLiteral.Result)@macro.jl:61
(::HypertextLiteral.var"#7#8"{Vector{HypertextLiteral.Result}})(::HypertextLiteral.EscapeProxy{IOContext{IOBuffer}})@convert.jl:86
print(::HypertextLiteral.EscapeProxy{IOContext{IOBuffer}}, ::HypertextLiteral.Reprint)@primitives.jl:51
(::HypertextLiteral.var"#1#2"{Tuple{HypertextLiteral.Bypass{String}, HypertextLiteral.Reprint, HypertextLiteral.Bypass{String}}})(::HypertextLiteral.EscapeProxy{IOContext{IOBuffer}})@macro.jl:52
show(::IOContext{IOBuffer}, ::MIME{Symbol("text/html")}, ::HypertextLiteral.Result)@macro.jl:57
show(::IOContext{IOBuffer}, ::MIME{Symbol("text/html")}, ::PlutoTest.SlottedDisplay)@notebook.jl:711
print@primitives.jl:52[inlined]
(::HypertextLiteral.var"#7#8"{Vector{PlutoTest.SlottedDisplay}})(::HypertextLiteral.EscapeProxy{IOContext{IOBuffer}})@convert.jl:86
print(::HypertextLiteral.EscapeProxy{IOContext{IOBuffer}}, ::HypertextLiteral.Reprint)@primitives.jl:51
(::HypertextLiteral.var"#1#2"{Tuple{HypertextLiteral.Bypass{String}, HypertextLiteral.Reprint, HypertextLiteral.Bypass{String}, HypertextLiteral.Reprint, HypertextLiteral.Bypass{String}, HypertextLiteral.Reprint, HypertextLiteral.Bypass{String}, HypertextLiteral.Bypass{String}, HypertextLiteral.Bypass{String}}})(::HypertextLiteral.EscapeProxy{IOContext{IOBuffer}})@macro.jl:52
print(::HypertextLiteral.EscapeProxy{IOContext{IOBuffer}}, ::HypertextLiteral.Result)@macro.jl:61
(::HypertextLiteral.var"#1#2"{Tuple{HypertextLiteral.Bypass{String}, HypertextLiteral.Reprint, HypertextLiteral.Bypass{String}, HypertextLiteral.Result, HypertextLiteral.Bypass{String}, HypertextLiteral.Bypass{String}, HypertextLiteral.Bypass{String}, HypertextLiteral.Bypass{String}, HypertextLiteral.Bypass{String}}})(::HypertextLiteral.EscapeProxy{IOContext{IOBuffer}})@macro.jl:52
show(::IOContext{IOBuffer}, ::MIME{Symbol("text/html")}, ::HypertextLiteral.Result)@macro.jl:57
show(::IOContext{IOBuffer}, ::MIME{Symbol("text/html")}, ::PlutoTest.CorrectCall)@notebook.jl:1221
show_richest(::IOContext{IOBuffer}, ::Any)@PlutoRunner.jl:654
var"#sprint_withreturned#28"(::IOContext{Base.DevNull}, ::Int64, ::typeof(Main.PlutoRunner.sprint_withreturned), ::Function, ::PlutoTest.CorrectCall)@PlutoRunner.jl:591
format_output_default(::Any, ::Any)@PlutoRunner.jl:515
#format_output#17@PlutoRunner.jl:532[inlined]
formatted_result_of(::Base.UUID, ::Bool, ::Nothing, ::Module)@PlutoRunner.jl:448
top-level scope@none:1
(::Distributed.var"#106#108"{Distributed.CallMsg{:call_fetch}})()@process_messages.jl:278
run_work_thunk(::Distributed.var"#106#108"{Distributed.CallMsg{:call_fetch}}, ::Bool)@process_messages.jl:63
macro expansion@process_messages.jl:278[inlined]
(::Distributed.var"#105#107"{Distributed.CallMsg{:call_fetch}, Distributed.MsgHeader, Sockets.TCPSocket})()@task.jl:411

when trying to display the test result.

Here is a MWE:

### A Pluto.jl notebook ###
# v0.15.0

using Markdown
using InteractiveUtils

# ╔═╡ e72db698-d351-11eb-17f2-6f472bf03968
begin
	import Pkg
	Pkg.activate(mktempdir())
	Pkg.add([
	   Pkg.PackageSpec(url="https://github.com/JuliaPluto/PlutoTest.jl")
	])
end

# ╔═╡ 25a017f0-fc4d-4838-9b98-3923796f59ed
using PlutoTest

# ╔═╡ 26873798-e2b7-40df-bd22-8a71e7e21d81
f(t) = "Q60"

# ╔═╡ b38c3423-4f76-4fe4-92ac-d7624c7b017d
@test f(2) == "Q60"

# ╔═╡ 81735126-fb74-4add-93f2-b9b5a427ae03
struct A end

# ╔═╡ 7c0bbcf1-7a3b-41f1-8ac7-a3c1ba03ed10
f(A())

# ╔═╡ 209682f4-21ab-4038-b005-4978d078c4e6
@test f(A()) == "Q60"

# ╔═╡ Cell order:
# ╠═e72db698-d351-11eb-17f2-6f472bf03968
# ╠═25a017f0-fc4d-4838-9b98-3923796f59ed
# ╠═26873798-e2b7-40df-bd22-8a71e7e21d81
# ╠═b38c3423-4f76-4fe4-92ac-d7624c7b017d
# ╠═81735126-fb74-4add-93f2-b9b5a427ae03
# ╠═7c0bbcf1-7a3b-41f1-8ac7-a3c1ba03ed10
# ╠═209682f4-21ab-4038-b005-4978d078c4e6

Feel free to ignore or delete this issue if PlutoTest isn't in a stage where you take error reports yet :).

[fonsp]

Thanks @karlwessel ! Keep the reports coming!

[karlwessel]

This seems to be fixed now, thanks!