Fix Vararg handling on v1.7+ (#17)

Author: christopher-dG

.github/workflows/CI.yml

@@ -0,0 +1,42 @@
+name: CI
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+jobs:
+  test:
+    name: Julia ${{ matrix.version }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        version:
+          - 1.6
+          - 1
+          - nightly
+    steps:
+      - uses: actions/checkout@v2
+      - uses: julia-actions/setup-julia@v1
+        with:
+          version: ${{ matrix.version }}
+      - uses: julia-actions/julia-buildpkg@v1
+      - uses: julia-actions/julia-runtest@v1
+        continue-on-error: ${{ matrix.version == 'nightly' }}
+  docs:
+    name: Documentation
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: julia-actions/setup-julia@v1
+        with:
+          version: 1
+      - run: |
+          julia --project=docs -e '
+            using Pkg
+            Pkg.develop(PackageSpec(path=pwd()))
+            Pkg.instantiate()'
+      - run: julia --project=docs docs/make.jl
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}

.travis.yml

@@ -1,7 +1,7 @@
 name = "SimpleMock"
 uuid = "a896ed2c-15a5-4479-b61d-a0e88e2a1d25"
 authors = ["Chris de Graaf <[email protected]>"]
-version = "1.2.0"
+version = "1.2.1"
 
 [deps]
 Cassette = "7057c7e9-c182-5462-911a-8362d720325c"

Project.toml

@@ -1,4 +1,11 @@
-# SimpleMock [![Docs](https://img.shields.io/badge/docs-stable-blue.svg)](https://juliatesting.github.io/SimpleMock.jl) [![Build Status](https://travis-ci.com/JuliaTesting/SimpleMock.jl.svg?branch=master)](https://travis-ci.com/JuliaTesting/SimpleMock.jl)
+# SimpleMock [![Docs](https://img.shields.io/badge/docs-stable-blue.svg)](https://juliatesting.github.io/SimpleMock.jl) [![CI](https://github.com/JuliaTesting/SimpleMock.jl/actions/workflows/CI.yml/badge.svg)](https://github.com/JuliaTesting/SimpleMock.jl/actions/workflows/CI.yml)
+
+### Notice: kind of broken
+
+This package is [broken in some cases on Julia 1.6 and newer](https://github.com/JuliaTesting/SimpleMock.jl/issues/13), for unknown reasons.
+Use at your own risk!
+
+---
 
 A basic mocking module, inspired by Python's [`unittest.mock`](https://docs.python.org/3/library/unittest.mock.html) and implemented with [Cassette](https://github.com/jrevels/Cassette.jl).
 

README.md

@@ -10,6 +10,10 @@ using Base: Callable, invokelatest, unwrap_unionall
 using Base.Iterators: Pairs
 using Core: Builtin, kwftype
 
+if VERSION >= v"1.7"
+    using Core: TypeofVararg
+end
+
 using Cassette: Cassette, Context, overdub, posthook, prehook, recurse, @context
 
 export

src/SimpleMock.jl

@@ -184,7 +184,20 @@ function make_overdub(::Type{Ctx}, f::F, sig::Tuple) where {Ctx <: Context, F}
         T_uw = unwrap_unionall(T)
         name = gensym()
 
-        if T_uw.name.name === :Vararg
+        if VERSION >= v"1.7" && T_uw isa TypeofVararg
+            # T === T_uw.
+            if isdefined(T, :T) && isdefined(T, :N)  # Vararg{T, N}.
+                foreach(1:T.N) do _i
+                    push!(sig_exs, :($name::$(T.T)))
+                    push!(sig_names, name)
+                    name = gensym()
+                end
+            else  # Vararg{T, N} where {T, N} or Vararg{T, N} where N.
+                T = Vararg{Any}
+                push!(sig_exs, :($name::$(T.T)...))
+                push!(sig_names, :($name...))
+            end
+        elseif T_uw.name.name === :Vararg
             if T isa UnionAll && T.body isa UnionAll  # Vararg{T, N} where {T, N}.
                 T = Vararg{Any}
             end