test(io): add Gmsh ASCII reader regression

test/io/test_gmsh_reader.jl

@@ -0,0 +1,21 @@
+# SPDX-FileCopyrightText: 2015-2026 Jukka Aho
+# SPDX-License-Identifier: MIT
+
+using Test
+using JuliaFEM.GmshReader: read_gmsh_mesh, get_surface_nodes
+
+@testset "GmshReader Tet4 (ASCII 4.1)" begin
+    path = joinpath(@__DIR__, "..", "testdata", "cantilever_beam.msh")
+    gm = read_gmsh_mesh(path)
+    @test size(gm.nodes, 1) == 3
+    @test size(gm.elements, 1) == 4
+    @test size(gm.nodes, 2) ≥ 1
+    @test size(gm.elements, 2) ≥ 1
+    @test haskey(gm.physical_groups, "Bulk")
+
+    fix = get_surface_nodes(gm, "FixedEnd")
+    top = get_surface_nodes(gm, "PressureSurface")
+    @test !isempty(fix)
+    @test !isempty(top)
+    @test isempty(get_surface_nodes(gm, "UnknownBoundary"))
+end