bird-count

elixir/bird-count/test/bird_count_test.exs

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+defmodule BirdCountTest do
+  use ExUnit.Case
+
+  describe "today/1" do
+    @tag task_id: 1
+    test "returns nil if no bird watching data recorded" do
+      assert BirdCount.today([]) == nil
+    end
+
+    @tag task_id: 1
+    test "returns today's bird count" do
+      assert BirdCount.today([7]) == 7
+      assert BirdCount.today([2, 4, 11, 10, 6, 8]) == 2
+    end
+  end
+
+  describe "increment_day_count/1" do
+    @tag task_id: 2
+    test "creates entry for today if no bird watching data recorded" do
+      assert BirdCount.increment_day_count([]) == [1]
+    end
+
+    @tag task_id: 2
+    test "adds 1 to today's bird count" do
+      assert BirdCount.increment_day_count([7]) == [8]
+      assert BirdCount.increment_day_count([4, 2, 1, 0, 10]) == [5, 2, 1, 0, 10]
+    end
+  end
+
+  describe "has_day_without_birds?/1" do
+    @tag task_id: 3
+    test "false if no bird watching data recorded" do
+      assert BirdCount.has_day_without_birds?([]) == false
+    end
+
+    @tag task_id: 3
+    test "false if there are no zeros in bird watching data" do
+      assert BirdCount.has_day_without_birds?([1]) == false
+      assert BirdCount.has_day_without_birds?([6, 7, 10, 2, 5]) == false
+    end
+
+    @tag task_id: 3
+    test "true if there are is at least one zero in bird watching data" do
+      assert BirdCount.has_day_without_birds?([0]) == true
+      assert BirdCount.has_day_without_birds?([4, 4, 0, 1]) == true
+      assert BirdCount.has_day_without_birds?([0, 0, 3, 0, 5, 6, 0]) == true
+    end
+  end
+
+  describe "total/1" do
+    @tag task_id: 4
+    test "zero if no bird watching data recorded" do
+      assert BirdCount.total([]) == 0
+    end
+
+    @tag task_id: 4
+    test "sums up bird counts" do
+      assert BirdCount.total([4]) == 4
+      assert BirdCount.total([3, 0, 0, 4, 4, 0, 0, 10]) == 21
+    end
+  end
+
+  describe "busy_days/1" do
+    @tag task_id: 5
+    test "zero if no bird watching data recorded" do
+      assert BirdCount.busy_days([]) == 0
+    end
+
+    @tag task_id: 5
+    test "counts days with bird count of 5 or more" do
+      assert BirdCount.busy_days([1]) == 0
+      assert BirdCount.busy_days([0, 5]) == 1
+      assert BirdCount.busy_days([0, 6, 10, 4, 4, 5, 0]) == 3
+    end
+  end
+end

elixir/bird-count/test/test_helper.exs

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+ExUnit.start()
+ExUnit.configure(exclude: :pending, trace: true, seed: 0)