Test MissingInitError

JuliaFolds · Dec 12, 2019 · c053d7e · c053d7e
1 parent 5b51f18
commit c053d7e
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Showing 3 changed files with 11 additions and 1 deletion.
diff --git a/test/preamble.jl b/test/preamble.jl
@@ -5,7 +5,7 @@ using Statistics: mean
 using Transducers
 using Transducers: Transducer, simple_transduce, Reduced, isexpansive,
     TeeZip, GetIndex, SetIndex, Inject, @~,
-    EmptyResultError, IdentityNotDefinedError, AbortIf, @next
+    EmptyResultError, IdentityNotDefinedError, MissingInitError, AbortIf, @next
 using InitialValues: Init
 using Logging: NullLogger, with_logger
 

diff --git a/test/test_library.jl b/test/test_library.jl
@@ -506,6 +506,10 @@ end
         ),
         [1, 2, 1, 2, 3],
     ) == Dict(2 => 4, 1 => 2)
+
+    err = @test_error GroupBy(identity, -)
+    @test err isa MissingInitError
+    @test occursin("No default identity element for -", sprint(showerror, err))
 end
 
 @testset "ReduceIf" begin

diff --git a/test/test_processes.jl b/test/test_processes.jl
@@ -275,6 +275,12 @@ end
     @test occursin("op = $unknownadd", msg)
 end
 
+@testset "MissingInitError" begin
+    err = @test_error foldl(-, Map(identity), 1:1)
+    @test err isa MissingInitError
+    @test occursin("No default identity element for -", sprint(showerror, err))
+end
+
 @testset "identityof error" begin
     @test_throws EmptyResultError mapfoldl(Map(identity), right, Any[])
     err = @test_error mapfoldl(Map(identity), +, Any[])