add Tooltip styles tests

src/__tests__/Tooltip/style.test.js

@@ -0,0 +1,47 @@
+import {
+  defaultStyle,
+  mobileStyle,
+  desktopStyle
+} from '../../Tooltip/style'
+
+describe('Tooltip styles', () => {
+  describe('defaultStyle', () => {
+    it('should return the default styles', () => {
+      const backgroundColor = '#C562A4'
+
+      const expected = "line-height:0;" +
+        "transition:all .2s ease-in-out;" +
+        "background:" + backgroundColor + ";"
+
+      expect(defaultStyle(backgroundColor)).toEqual(expected)
+    })
+  })
+
+  describe('mobileStyle', () => {
+    it('should return mobile styles', () => {
+      const buttonSize = 50
+
+      const expected = "position:fixed;" +
+        "bottom:calc(50% - 64px);" +
+        "left:0;" +
+        "width:" + buttonSize + "px;" +
+        "border-top-right-radius:5px;" +
+        "border-bottom-right-radius:5px;"
+
+      expect(mobileStyle(buttonSize)).toEqual(expected)
+    })
+  })
+
+  describe('desktopStyle', () => {
+    it('should return desktop styles', () => {
+      const [top, left] = [10, 20]
+
+      const expected = "position:absolute;" +
+        "border-radius:3px;" +
+        "top:" + top + "px;" +
+        "left:" + left + "px;"
+
+      expect(desktopStyle(top, left)).toEqual(expected)
+    })
+  })
+})