Added library size to homepage (#264)

test/pinchflat/utils/number_utils_test.exs

@@ -16,4 +16,35 @@ defmodule Pinchflat.Utils.NumberUtilsTest do
       assert NumberUtils.clamp(2, 1, 3) == 2
     end
   end
+
+  describe "human_byte_size/1" do
+    test "converts byte size to human readable format" do
+      assert NumberUtils.human_byte_size(1024) == {1, "KB"}
+      assert NumberUtils.human_byte_size(1024 * 1024) == {1, "MB"}
+      assert NumberUtils.human_byte_size(1024 * 1024 * 1024) == {1, "GB"}
+      assert NumberUtils.human_byte_size(1024 * 1024 * 1024 * 1024) == {1, "TB"}
+      assert NumberUtils.human_byte_size(1024 * 1024 * 1024 * 1024 * 1024) == {1, "PB"}
+      assert NumberUtils.human_byte_size(1024 * 1024 * 1024 * 1024 * 1024 * 1024) == {1, "EB"}
+      assert NumberUtils.human_byte_size(1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024) == {1, "ZB"}
+      assert NumberUtils.human_byte_size(1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024) == {1, "YB"}
+    end
+
+    test "returns the number when it is less than 1024" do
+      assert NumberUtils.human_byte_size(512) == {512, "B"}
+    end
+
+    test "optionally takes a precision" do
+      assert NumberUtils.human_byte_size(1234 * 1024, precision: 0) == {1, "MB"}
+      assert NumberUtils.human_byte_size(1234 * 1024, precision: 1) == {1.2, "MB"}
+      assert NumberUtils.human_byte_size(1234 * 1024, precision: 2) == {1.21, "MB"}
+    end
+
+    test "handles 0's well" do
+      assert NumberUtils.human_byte_size(0) == {0, "B"}
+    end
+
+    test "handles nil well" do
+      assert NumberUtils.human_byte_size(nil) == {0, "B"}
+    end
+  end
 end