45 lines
1.2 KiB
Elixir
45 lines
1.2 KiB
Elixir
defmodule NucleotideCountTest do
|
|
use ExUnit.Case
|
|
|
|
describe "count" do
|
|
test "empty dna string has no adenine" do
|
|
assert NucleotideCount.count(~c"", ?A) == 0
|
|
end
|
|
|
|
test "one nucleotide" do
|
|
assert NucleotideCount.count(~c"G", ?G) == 1
|
|
end
|
|
|
|
test "repetitive cytosine gets counted" do
|
|
assert NucleotideCount.count(~c"CCCCC", ?C) == 5
|
|
end
|
|
|
|
test "counts only thymine" do
|
|
assert NucleotideCount.count(~c"GGGGGTAACCCGG", ?T) == 1
|
|
end
|
|
end
|
|
|
|
describe "histogram" do
|
|
test "empty dna string has no nucleotides" do
|
|
expected = %{?A => 0, ?T => 0, ?C => 0, ?G => 0}
|
|
assert NucleotideCount.histogram(~c"") == expected
|
|
end
|
|
|
|
test "one nucleotide" do
|
|
expected = %{?A => 0, ?T => 0, ?C => 0, ?G => 1}
|
|
assert NucleotideCount.histogram(~c"G") == expected
|
|
end
|
|
|
|
test "repetitive sequence has only guanine" do
|
|
expected = %{?A => 0, ?T => 0, ?C => 0, ?G => 8}
|
|
assert NucleotideCount.histogram(~c"GGGGGGGG") == expected
|
|
end
|
|
|
|
test "counts all nucleotides" do
|
|
s = ~c"AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC"
|
|
expected = %{?A => 20, ?T => 21, ?C => 12, ?G => 17}
|
|
assert NucleotideCount.histogram(s) == expected
|
|
end
|
|
end
|
|
end
|