Test degenrate matmul cases

JuliaArrays · Oct 22, 2019 · 829034c · 829034c
1 parent ce7c422
commit 829034c
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/test/base_maths.jl b/test/base_maths.jl
@@ -68,6 +68,7 @@ using Test
  end # Addition
 
  @testset "Multiplication" begin
+
  @testset "BlockDiagonal * BlockDiagonal" begin
  @test b1 * b1 isa BlockDiagonal
  @test Matrix(b1 * b1) ≈ Matrix(b1) * Matrix(b1)
@@ -96,6 +97,13 @@ using Test
  @test A′ * b1 isa Matrix
  @test A′ * b1 ≈ A′ * Matrix(b1)
  @test_throws DimensionMismatch A * b1
+
+ # degenerate cases
+ m = rand(0, 0)
+ @test m * BlockDiagonal([m]) == m * m == m
+ m = rand(5, 0)
+ @test m' * BlockDiagonal([m]) == m' * m == rand(0, 0)
+ @test m * BlockDiagonal([m']) == m * m' == zeros(5, 5)
  end
 
  @testset "BlockDiagonal * Diagonal" begin