add failing test (take 2)

Author: ericphanson

Project.toml

@@ -9,17 +9,19 @@ Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 [weakdeps]
 FlameGraphs = "08572546-2f56-4bcf-ba4e-bab62c3a3f89"
 
+[extensions]
+FlameGraphsExt = "FlameGraphs"
+
 [compat]
 ExprTools = "0.1.0"
 FlameGraphs = "1"
+Pkg = "1"
 julia = "1.10"
 
 [extras]
 FlameGraphs = "08572546-2f56-4bcf-ba4e-bab62c3a3f89"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
-
-[extensions]
-FlameGraphsExt = "FlameGraphs"
+Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 
 [targets]
-test = ["Test", "FlameGraphs"]
+test = ["Test", "FlameGraphs", "Pkg"]

test/TestPkg/Project.toml

@@ -0,0 +1,6 @@
+name = "TestPkg"
+uuid = "a1172fb3-f03b-46d1-aab3-7b5cb3128a7b"
+version = "0.1.0"
+
+[deps]
+TimerOutputs = "a759f4b9-e2f1-59dc-863e-4aeb61b1ea8f"

test/TestPkg/src/TestPkg.jl

@@ -0,0 +1,11 @@
+module TestPkg
+
+using TimerOutputs
+
+const TIMER = TimerOutput()
+
+@timeit TIMER function abc()
+    1 + 1
+end
+
+end # module TestPkg

test/coverage_script.jl

@@ -0,0 +1,7 @@
+# entrypoint to TestPkg to invoke `abc`
+using Pkg, TimerOutputs
+
+Pkg.develop(; path=joinpath(pkgdir(TimerOutputs), "test", "TestPkg"))
+using TestPkg
+
+TestPkg.abc()

test/runtests.jl

@@ -759,3 +759,5 @@ end
     flamegraph(to)
     flamegraph(to, crop_root=true)
 end
+
+include("test_coverage.jl")

test/test_coverage.jl

@@ -0,0 +1,16 @@
+function find_cov_files()
+    pkg = joinpath(pkgdir(TimerOutputs), "test", "TestPkg")
+    return filter(endswith(".cov"), readdir(joinpath(pkg, "src"); join=true))
+end
+
+# remove existing coverage
+foreach(rm, find_cov_files())
+
+@testset "functions defined with `@timeit` macro generate code coverage" begin
+    @test isempty(find_cov_files())
+
+    script = joinpath(pkgdir(TimerOutputs), "test", "coverage_script.jl")
+    run(`julia --startup-file=no --project=$(pkgdir(TimerOutputs)) --check-bounds=yes --code-coverage $script`)
+
+    @test !isempty(find_cov_files())
+end