Replace Karma + Jasmine with Jest

__mocks__/d3.js

@@ -0,0 +1,34 @@
+let NewD3 = function () {
+  return {
+    append: function () {
+      return NewD3()
+    },
+    attr: function () {
+      return this
+    },
+    style: function () {
+      return this
+    },
+    text: function () {
+      return this
+    },
+    0: {
+      0: {
+        getBBox: function () {
+          return {
+            height: 10,
+            width: 20
+          }
+        }
+      }
+    }
+  }
+}
+
+export const select = function () {
+  return new NewD3()
+}
+
+export const selectAll = function () {
+  return new NewD3()
+}