From ee6bcd96638f97a78910d55a60a2d9f46fd7d7c3 Mon Sep 17 00:00:00 2001
From: Neven Sajko <4944410+nsajko@users.noreply.github.com>
Date: Sat, 1 Feb 2025 14:06:20 +0100
Subject: [PATCH] test trying to construct array with `undef` but no element
 type (#97)

---
 test/runtests.jl | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/test/runtests.jl b/test/runtests.jl
index 62ab341..43b4dd3 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -150,6 +150,11 @@ end
         test_inferred(FixedSizeVector{Int}, return_type, arr)
     end
 
+    @testset "`undef` construction without element type" begin
+        @test_throws MethodError FixedSizeVector(undef, 1)
+        @test_throws MethodError FixedSizeMatrix(undef, 1, 1)
+    end
+
     for storage_type ∈ (((@isdefined Memory) ? (Memory,) : ())..., Vector)
         FSV = fsv(storage_type)
         FSM = fsm(storage_type)
@@ -167,6 +172,10 @@ end
         end
 
         @testset "Constructors" begin
+            @testset "`undef` construction without element type" begin
+                @test_throws MethodError FSV(undef, 1)
+                @test_throws MethodError FSM(undef, 1, 1)
+            end
             @testset "mismatched ndims" begin
                 @test_throws MethodError FSV{Int}(undef)
                 @test_throws MethodError FSV{Int}(undef, 1, 1)