Test two combinations in triangular test sets (#1294)

Change `elty1` to `elty2` to avoid repeating the condition.

Author: jishnub

test/testtriag.jl

@@ -314,10 +314,10 @@ function test_triangular(elty1_types)
             @test ((A1 \ A1)::t1) ≈ M1 \ M1
 
             # Begin loop for second Triangular matrix
-            @testset for elty2 in (Float32, Float64, BigFloat, ComplexF32, ComplexF64, Complex{BigFloat}, Int)
+            @testset for elty2 in push!(Set((ComplexF32, Int)), elty1)
                 # Only test methods for the same element type and a single combination of mixed element types
                 # to avoid too much compilation
-                if !(elty1 == elty2 || elty1 ∈ (ComplexF32, Int) || elty1 ∈ (ComplexF32, Int))
+                if elty1 ∉ (elty2, ComplexF32, Int)
                     continue
                 end
                 @testset for (t2, uplo2) in ((UpperTriangular, :U),
@@ -409,10 +409,10 @@ function test_triangular(elty1_types)
                 end
             end
 
-            @testset for eltyB in (Float32, Float64, BigFloat, ComplexF32, ComplexF64, Complex{BigFloat})
+            @testset for eltyB in push!(Set((ComplexF32,)), elty1)
                 # Only test methods for the same element type and a single combination of mixed element types
                 # to avoid too much compilation
-                if !(elty1 == eltyB || elty1 ∈ (ComplexF32, Int) || eltyB ∈ (ComplexF32, Int))
+                if elty1 ∉ (eltyB, ComplexF32, Int)
                     continue
                 end