Add some basic error testing, don't use logging macro for errors

src/Common.jl

@@ -5,7 +5,7 @@ end
 
 function rand(::Type{T}, w::W, n::Int64; checkinput::Bool=true) where {T <: GeneticSeq, W<: Weights}
   if checkinput && length(w) != 4
-    @error "Invalid sampling weights for $T generation"
+    throw(ErrorException("Invalid sampling weights for $T generation"))
   end
   x = BitArray(fill(0, (4, n)))
   @simd for i = 1:n
@@ -42,7 +42,7 @@ function setindex!(x::T, a::BitArray{1}, i::Int64) where {T <: GeneticSeq}
   if length(a) == 4 && sum(a) == 1
     return x.data[:, i] = a
   else
-    @error "Invalid input"
+    throw(ErrorException("Invalid input"))
   end
 end
 

src/DNA.jl

@@ -6,7 +6,7 @@ struct DNASeq <: GeneticSeq
       if _checkinput(x)
         return new(x)
       else
-        @error "Invalid input"
+        throw(ErrorException("Invalid input"))
       end
     else
       return new(x)
@@ -25,7 +25,7 @@ function onehot(::Type{DNASeq}, x::Char)
   elseif x == 'T'
     return BitArray{1}([0, 0, 0, 1])
   else
-    @error "Invalid  `Char`"
+    throw(ErrorException("Invalid `Char`"))
   end
 end
 
@@ -47,7 +47,7 @@ function DNASeq(seq::Vector{Char})
     elseif seq[i] == 'T'
       x[4, i] = 1
     else
-      @error "Invalid  `Char` at index $i"
+      throw(ErrorException("Invalid `Char` at index $i"))
     end
   end
   return DNASeq(x, checkinput=false)

src/RNA.jl

@@ -6,7 +6,7 @@ struct RNASeq <: GeneticSeq
       if _checkinput(x)
         return new(x)
       else
-        @error "Invalid input"
+        throw(ErrorException("Invalid input"))
       end
     else
       return new(x)
@@ -25,7 +25,7 @@ function onehot(::Type{RNASeq}, x::Char)
   elseif x == 'U'
     return BitArray{1}([0, 0, 0, 1])
   else
-    @error "Invalid `Char`"
+    throw(ErrorException("Invalid `Char`"))
   end
 end
 
@@ -47,7 +47,7 @@ function RNASeq(seq::Vector{Char})
     elseif seq[i] == 'U'
       x[4, i] = 1
     else
-      @error "Invalid  `Char` at index $i"
+      throw(ErrorException("Invalid `Char` at index $i"))
     end
   end
   return RNASeq(x, checkinput=false)

test/runtests.jl

@@ -23,3 +23,9 @@ end
   b[1] = 'U'
   @test b[1] == RNASeq("U")
 end
+
+@testset "Errors" begin
+  @test_throws ErrorException DNASeq("AAAU")
+  @test_throws ErrorException RNASeq("AAAT")
+  @test_throws ErrorException rand(RNASeq, Weights(fill(0.25, 3)), 1000)
+end