From f83cd94cda35081a48d7cd693ca24f9fdf38c078 Mon Sep 17 00:00:00 2001
From: TheoryOfNekomata <allan.crisostomo@outlook.com>
Date: Sun, 26 Jul 2020 10:50:31 +0800
Subject: [PATCH] Improve test coverage

Cover scenarios primarily for adjusted behavior on Button, as well as ensure components are exported correctly.
---
 .npmignore                                    |   1 -
 .prettierrc                                   |   2 +-
 lib/components/Button/Button.test.tsx         |  64 ++++-
 lib/components/Button/Button.tsx              | 218 ++++++++++-----
 lib/components/Checkbox/Checkbox.test.tsx     |   3 +
 lib/components/Checkbox/Checkbox.tsx          |  26 +-
 lib/components/Icon/Icon.test.tsx             |   3 +
 lib/components/Icon/Icon.tsx                  |  21 +-
 .../RadioButton/RadioButton.test.tsx          |   3 +
 lib/components/RadioButton/RadioButton.tsx    |  61 +++--
 lib/components/Select/Select.test.tsx         |  30 +--
 lib/components/Select/Select.tsx              |  86 +++---
 lib/components/Slider/Slider.test.tsx         |   3 +
 lib/components/Slider/Slider.tsx              |  74 ++---
 lib/components/TextInput/TextInput.test.tsx   |  45 +---
 lib/components/TextInput/TextInput.tsx        | 253 ++++++++----------
 lib/index.test.ts                             |  26 ++
 lib/services/isEmpty.test.ts                  |  18 +-
 lib/services/isEmpty.ts                       |   5 +-
 lib/services/splitValueAndUnit.test.ts        |  41 +--
 lib/services/splitValueAndUnit.ts             |   6 +-
 lib/services/stringify.test.ts                |  55 ++--
 lib/services/stringify.ts                     |   8 +-
 package.json                                  |   2 +-
 24 files changed, 534 insertions(+), 520 deletions(-)
 create mode 100644 lib/index.test.ts

diff --git a/.npmignore b/.npmignore
index 54bdf08..30ba8a2 100644
--- a/.npmignore
+++ b/.npmignore
@@ -8,7 +8,6 @@ utilities/
 .editorconfig
 .prettierrc
 doczrc.js
-global.d.ts
 jest.config.js
 jest.setup.ts
 plopfile.js
diff --git a/.prettierrc b/.prettierrc
index 75c93d5..3380468 100644
--- a/.prettierrc
+++ b/.prettierrc
@@ -4,6 +4,6 @@
   "printWidth": 120,
   "semi": false,
   "trailingComma": "all",
-  "quoteProps": "consistent",
+  "quoteProps": "as-needed",
   "arrowParens": "always"
 }
diff --git a/lib/components/Button/Button.test.tsx b/lib/components/Button/Button.test.tsx
index e2c1b70..c2f286c 100644
--- a/lib/components/Button/Button.test.tsx
+++ b/lib/components/Button/Button.test.tsx
@@ -1,16 +1,17 @@
+/// <reference types="jest-enzyme" />
+/// <reference path="../../../utilities/jest/extensions.ts" />
+
 import * as fc from 'fast-check'
 import * as Enzyme from 'enzyme'
 import * as Axe from 'jest-axe'
 import * as React from 'react'
-import Button, { Variant } from './Button'
+import Button, { Variant, ButtonElement } from './Button'
 import stringify from '../../services/stringify'
 
 const CUSTOM_VARIANTS: string[] = ['primary']
 
 const AVAILABLE_VARIANTS: string[] = ['outline', 'primary']
 
-const BLOCK_DISPLAYS = ['block', 'grid', 'flex', 'table']
-
 it('should exist', () => {
   expect(Button).toBeDefined()
 })
@@ -23,21 +24,46 @@ it('should render without crashing given minimum required props', () => {
   expect(() => <Button />).not.toThrow()
 })
 
-it('should render a border', () => {
-  const wrapper = Enzyme.shallow(<Button />)
-  expect(wrapper.find('button').find('span')).toHaveLength(1)
+it('should render a button element for button kind', () => {
+  const wrapper = Enzyme.shallow(<Button element="button" />)
+  expect(wrapper.name()).toBe('button')
+})
+
+it('should render an a element for anchor kind', () => {
+  const wrapper = Enzyme.shallow(<Button element="a" />)
+  expect(wrapper.name()).toBe('a')
 })
 
-it('should render fullwidth when declared as block', () => {
-  const wrapper = Enzyme.shallow(<Button block />)
+describe('on unknown kinds', () => {
+  let originalConsoleError: typeof console.error
 
-  expect(wrapper.find('button')).toHaveStyle('width', '100%')
+  beforeEach(() => {
+    originalConsoleError = console.error
+    console.error = () => {}
+  })
+
+  afterEach(() => {
+    console.error = originalConsoleError
+  })
+
+  it('should render null', () => {
+    fc.assert(
+      fc.property(fc.string().filter(s => !['button', 'a'].includes(s)), (element) => {
+        const wrapper = Enzyme.shallow(<Button element={element as ButtonElement} />)
+
+        expect(wrapper.isEmptyRender()).toBe(true)
+      }),
+      {
+        numRuns: 300,
+      },
+    )
+  })
 })
 
-it('should render as block element when declared as block', () => {
-  const wrapper = Enzyme.shallow(<Button block />)
 
-  expect(BLOCK_DISPLAYS).toContain(wrapper.find('button').prop('style')!.display)
+it('should render a border', () => {
+  const wrapper = Enzyme.shallow(<Button />)
+  expect(wrapper.find('button').find('span')).toHaveLength(1)
 })
 
 it('should render a label', () => {
@@ -53,6 +79,18 @@ it('should render a label', () => {
   )
 })
 
+describe('on disabled', () => {
+  it('should render a disabled button element for button kind', () => {
+    const wrapper = Enzyme.shallow(<Button disabled element="button" />)
+    expect(wrapper.find('button')).toHaveProp('disabled', true)
+  })
+
+  it('should render a span element for anchor kind', () => {
+    const wrapper = Enzyme.shallow(<Button disabled element="a" />)
+    expect(wrapper.name()).toBe('span')
+  })
+})
+
 describe.each(AVAILABLE_VARIANTS)('with %p variant', (rawVariant) => {
   const variant = rawVariant as Variant
 
@@ -77,7 +115,7 @@ describe.each(AVAILABLE_VARIANTS)('with %p variant', (rawVariant) => {
 })
 
 describe('with unknown variants', () => {
-  let originalConsoleError: any
+  let originalConsoleError: typeof console.error
 
   beforeEach(() => {
     // silence console.error() from prop type validation since
diff --git a/lib/components/Button/Button.tsx b/lib/components/Button/Button.tsx
index adec171..410aba4 100644
--- a/lib/components/Button/Button.tsx
+++ b/lib/components/Button/Button.tsx
@@ -1,64 +1,86 @@
 import * as React from 'react'
 import * as PropTypes from 'prop-types'
-import styled from 'styled-components'
+import styled, { CSSObject } from 'styled-components'
 import { Size, SizeMap } from '../../services/utilities'
 import stringify from '../../services/stringify'
 
 export type Variant = 'outline' | 'primary'
 
+export type ButtonElement = 'a' | 'button'
+
+type ButtonType = 'submit' | 'reset' | 'button'
+
 const MIN_HEIGHTS: SizeMap<string | number> = {
   small: '2.5rem',
   medium: '3rem',
   large: '4rem',
 }
 
-const Base = styled('button')({
-  'appearance': 'none',
-  'padding': '0 1rem',
-  'font': 'inherit',
-  'fontFamily': 'var(--font-family-base)',
-  'textTransform': 'uppercase',
-  'fontWeight': 'bolder',
-  'borderRadius': '0.25rem',
-  'placeContent': 'center',
-  'position': 'relative',
-  'cursor': 'pointer',
-  'border': 0,
-  'userSelect': 'none',
-  'textDecoration': 'none',
-  'transitionProperty': 'background-color, color',
-  'whiteSpace': 'nowrap',
-  'lineHeight': 1,
+const disabledButtonStyles: CSSObject = {
+  opacity: 0.5,
+  cursor: 'not-allowed',
+}
+
+const buttonStyles: CSSObject = {
+  display: 'grid',
+  appearance: 'none',
+  padding: '0 1rem',
+  font: 'inherit',
+  fontFamily: 'var(--font-family-base)',
+  textTransform: 'uppercase',
+  fontWeight: 'bolder',
+  borderRadius: '0.25rem',
+  placeContent: 'center',
+  position: 'relative',
+  cursor: 'pointer',
+  border: 0,
+  userSelect: 'none',
+  textDecoration: 'none',
+  transitionProperty: 'background-color, color',
+  whiteSpace: 'nowrap',
+  lineHeight: 1,
   ':focus': {
     '--color-accent': 'var(--color-active, Highlight)',
-    'outline': 0,
-  },
-  ':disabled': {
-    opacity: 0.5,
-    cursor: 'not-allowed',
+    outline: 0,
   },
+  ':disabled': disabledButtonStyles,
   '::-moz-focus-inner': {
     outline: 0,
     border: 0,
   },
-})
+}
+
+const disabledLinkButtonStyles: CSSObject = {
+  ...buttonStyles,
+  ...disabledButtonStyles,
+}
+
+const Base = styled('button')(buttonStyles)
 
 Base.displayName = 'button'
 
+const LinkBase = styled('a')(buttonStyles)
+
+LinkBase.displayName = 'a'
+
+const DisabledLinkBase = styled('span')(disabledLinkButtonStyles)
+
+DisabledLinkBase.displayName = 'span'
+
 const Border = styled('span')({
-  'borderColor': 'var(--color-accent, blue)',
-  'boxSizing': 'border-box',
-  'display': 'inline-block',
-  'borderWidth': '0.125rem',
-  'borderStyle': 'solid',
-  'position': 'absolute',
-  'top': 0,
-  'left': 0,
-  'width': '100%',
-  'height': '100%',
-  'borderRadius': 'inherit',
-  'pointerEvents': 'none',
-  'transitionProperty': 'border-color',
+  borderColor: 'var(--color-accent, blue)',
+  boxSizing: 'border-box',
+  display: 'inline-block',
+  borderWidth: '0.125rem',
+  borderStyle: 'solid',
+  position: 'absolute',
+  top: 0,
+  left: 0,
+  width: '100%',
+  height: '100%',
+  borderRadius: 'inherit',
+  pointerEvents: 'none',
+  transitionProperty: 'border-color',
   '::before': {
     position: 'absolute',
     top: 0,
@@ -77,6 +99,19 @@ const Border = styled('span')({
 
 Border.displayName = 'span'
 
+const defaultVariantStyleSet: React.CSSProperties = {
+  backgroundColor: 'transparent',
+  color: 'var(--color-accent, blue)',
+}
+
+const variantStyleSets: Record<Variant, React.CSSProperties> = {
+  outline: defaultVariantStyleSet,
+  primary: {
+    backgroundColor: 'var(--color-accent, blue)',
+    color: 'var(--color-bg, white)',
+  },
+}
+
 const propTypes = {
   /**
    * Size of the component.
@@ -85,11 +120,7 @@ const propTypes = {
   /**
    * Variant of the component.
    */
-  variant: PropTypes.oneOf<Exclude<Variant, 'unknown'>>(['outline', 'primary']),
-  /**
-   * Should the component take up the remaining space parallel to the content flow?
-   */
-  block: PropTypes.bool,
+  variant: PropTypes.oneOf<Variant>(['outline', 'primary']),
   /**
    * Text to identify the action associated upon activation of the component.
    */
@@ -98,43 +129,88 @@ const propTypes = {
    * Can the component be activated?
    */
   disabled: PropTypes.bool,
+  /**
+   * The corresponding HTML element of the component.
+   */
+  element: PropTypes.oneOf<ButtonElement>(['a', 'button']),
+  /**
+   * The URL of the page to navigate to, if element is set to "a".
+   */
+  href: PropTypes.string,
+  /**
+   * The target on where to display the page navigated to, if element is set to "a".
+   */
+  target: PropTypes.string,
+  /**
+   * The relationship of the current page to the referred page in "href", if element is set to "a".
+   */
+  rel: PropTypes.string,
+  /**
+   * The type of the button, if element is set to "button".
+   */
+  type: PropTypes.oneOf<ButtonType>(['submit', 'reset', 'button']),
 }
 
 type Props = PropTypes.InferProps<typeof propTypes>
 
-const defaultVariantStyleSet: React.CSSProperties = {
-  backgroundColor: 'transparent',
-  color: 'var(--color-accent, blue)',
-}
-
-const variantStyleSets: Record<Variant, React.CSSProperties> = {
-  outline: defaultVariantStyleSet,
-  primary: {
-    backgroundColor: 'var(--color-accent, blue)',
-    color: 'var(--color-bg, white)',
-  },
-}
-
-const Button = React.forwardRef<HTMLButtonElement, Props>(
-  ({ size = 'medium', variant = 'outline', block = false, disabled = false, children, ...etcProps }, ref) => {
+const Button = React.forwardRef<HTMLAnchorElement | HTMLButtonElement | HTMLSpanElement, Props>(
+  (
+    {
+      size = 'medium',
+      variant = 'outline',
+      disabled = false,
+      children,
+      element = 'button',
+      href,
+      target,
+      rel,
+      type = 'button',
+    },
+    ref,
+  ) => {
     const { [variant as Variant]: theVariantStyleSet = defaultVariantStyleSet } = variantStyleSets
-
-    return (
-      <Base
-        {...etcProps}
-        ref={ref}
-        disabled={disabled!}
-        style={{
-          ...theVariantStyleSet,
-          minHeight: MIN_HEIGHTS[size as Size],
-          width: block ? '100%' : undefined,
-          display: block ? 'grid' : 'inline-grid',
-        }}
-      >
+    const commonButtonStyles: React.CSSProperties = {
+      ...theVariantStyleSet,
+      minHeight: MIN_HEIGHTS[size!],
+    }
+    const buttonContent = (
+      <React.Fragment>
         <Border />
         {stringify(children)}
-      </Base>
+      </React.Fragment>
     )
+
+    switch (element) {
+      case 'button':
+        return (
+          <Base type={type!} ref={ref as React.Ref<HTMLButtonElement>} disabled={disabled!} style={commonButtonStyles}>
+            {buttonContent}
+          </Base>
+        )
+      case 'a':
+        if (disabled) {
+          return (
+            <DisabledLinkBase ref={ref as React.Ref<HTMLSpanElement>} style={commonButtonStyles}>
+              {buttonContent}
+            </DisabledLinkBase>
+          )
+        }
+        return (
+          <LinkBase
+            href={href!}
+            target={target!}
+            rel={rel!}
+            ref={ref as React.Ref<HTMLAnchorElement>}
+            style={commonButtonStyles}
+          >
+            {buttonContent}
+          </LinkBase>
+        )
+      default:
+        break
+    }
+
+    return null
   },
 )
 
diff --git a/lib/components/Checkbox/Checkbox.test.tsx b/lib/components/Checkbox/Checkbox.test.tsx
index 602782f..2701bc2 100644
--- a/lib/components/Checkbox/Checkbox.test.tsx
+++ b/lib/components/Checkbox/Checkbox.test.tsx
@@ -1,3 +1,6 @@
+/// <reference types="jest-enzyme" />
+/// <reference path="../../../utilities/jest/extensions.ts" />
+
 import * as fc from 'fast-check'
 import * as Enzyme from 'enzyme'
 import * as Axe from 'jest-axe'
diff --git a/lib/components/Checkbox/Checkbox.tsx b/lib/components/Checkbox/Checkbox.tsx
index ae8104b..d458d4a 100644
--- a/lib/components/Checkbox/Checkbox.tsx
+++ b/lib/components/Checkbox/Checkbox.tsx
@@ -9,7 +9,7 @@ const Base = styled('div')({
 })
 
 const CaptureArea = styled('label')({
-  'marginTop': '0.25rem',
+  marginTop: '0.25rem',
   '::after': {
     content: '""',
   },
@@ -52,18 +52,18 @@ const IndicatorWrapper = styled('span')({
 })
 
 const Border = styled('span')({
-  'borderColor': 'var(--color-accent, blue)',
-  'boxSizing': 'border-box',
-  'display': 'inline-block',
-  'borderWidth': '0.125rem',
-  'borderStyle': 'solid',
-  'position': 'absolute',
-  'top': 0,
-  'left': 0,
-  'width': '100%',
-  'height': '100%',
-  'borderRadius': 'inherit',
-  'transitionProperty': 'border-color',
+  borderColor: 'var(--color-accent, blue)',
+  boxSizing: 'border-box',
+  display: 'inline-block',
+  borderWidth: '0.125rem',
+  borderStyle: 'solid',
+  position: 'absolute',
+  top: 0,
+  left: 0,
+  width: '100%',
+  height: '100%',
+  borderRadius: 'inherit',
+  transitionProperty: 'border-color',
   '::before': {
     position: 'absolute',
     top: 0,
diff --git a/lib/components/Icon/Icon.test.tsx b/lib/components/Icon/Icon.test.tsx
index 8d18042..becab96 100644
--- a/lib/components/Icon/Icon.test.tsx
+++ b/lib/components/Icon/Icon.test.tsx
@@ -1,3 +1,6 @@
+/// <reference types="jest-enzyme" />
+/// <reference path="../../../utilities/jest/extensions.ts" />
+
 import * as fc from 'fast-check'
 import * as Enzyme from 'enzyme'
 import * as React from 'react'
diff --git a/lib/components/Icon/Icon.tsx b/lib/components/Icon/Icon.tsx
index 4f1f01d..1dd47f9 100644
--- a/lib/components/Icon/Icon.tsx
+++ b/lib/components/Icon/Icon.tsx
@@ -6,10 +6,10 @@ import { pascalCase, pascalCaseTransformMerge } from 'pascal-case'
 import splitValueAndUnit from '../../services/splitValueAndUnit'
 
 const Label = styled('span')({
-  'position': 'absolute',
-  'left': -999999,
-  'width': 1,
-  'height': 1,
+  position: 'absolute',
+  left: -999999,
+  width: 1,
+  height: 1,
   ':empty': {
     display: 'none',
   },
@@ -51,19 +51,6 @@ const propTypes = {
 
 type Props = PropTypes.InferProps<typeof propTypes>
 
-/**
- * Component for displaying graphical icons.
- *
- * @see {@link //feathericons.com|Feather Icons} for a complete list of icons.
- * @param {string} name - Name of the icon to display.
- * @param {string} weight - Width of the icon's strokes.
- * @param {string | number} [size] - Size of the icon. This controls both the width and the height.
- * @param {CSSProperties} [style] - CSS style of the icon. For icon dimensions, use `size` instead.
- * @param {string} [label] - Describe of what the component represents.
- * @param {string} [className] - Class name used for styling.
- * @param {object} etcProps - The rest of the props.
- * @returns {React.ReactElement | null} - The component elements.
- */
 const Icon: React.FC<Props> = ({
   name,
   weight = '0.125rem',
diff --git a/lib/components/RadioButton/RadioButton.test.tsx b/lib/components/RadioButton/RadioButton.test.tsx
index 958b13e..59ff9b3 100644
--- a/lib/components/RadioButton/RadioButton.test.tsx
+++ b/lib/components/RadioButton/RadioButton.test.tsx
@@ -1,3 +1,6 @@
+/// <reference types="jest-enzyme" />
+/// <reference path="../../../utilities/jest/extensions.ts" />
+
 import * as fc from 'fast-check'
 import * as Enzyme from 'enzyme'
 import * as Axe from 'jest-axe'
diff --git a/lib/components/RadioButton/RadioButton.tsx b/lib/components/RadioButton/RadioButton.tsx
index b217bc6..59240b3 100644
--- a/lib/components/RadioButton/RadioButton.tsx
+++ b/lib/components/RadioButton/RadioButton.tsx
@@ -8,7 +8,7 @@ const Base = styled('div')({
 })
 
 const CaptureArea = styled('label')({
-  'marginTop': '0.25rem',
+  marginTop: '0.25rem',
   '::after': {
     content: '""',
     clear: 'both',
@@ -52,18 +52,18 @@ const IndicatorWrapper = styled('span')({
 })
 
 const Border = styled('span')({
-  'borderColor': 'var(--color-accent, blue)',
-  'boxSizing': 'border-box',
-  'display': 'inline-block',
-  'borderWidth': '0.125rem',
-  'borderStyle': 'solid',
-  'position': 'absolute',
-  'top': 0,
-  'left': 0,
-  'width': '100%',
-  'height': '100%',
-  'borderRadius': 'inherit',
-  'transitionProperty': 'border-color',
+  borderColor: 'var(--color-accent, blue)',
+  boxSizing: 'border-box',
+  display: 'inline-block',
+  borderWidth: '0.125rem',
+  borderStyle: 'solid',
+  position: 'absolute',
+  top: 0,
+  left: 0,
+  width: '100%',
+  height: '100%',
+  borderRadius: 'inherit',
+  transitionProperty: 'border-color',
   '::before': {
     position: 'absolute',
     top: 0,
@@ -131,21 +131,26 @@ type Props = PropTypes.InferProps<typeof propTypes>
  * @see {@link Select} for a similar component suitable for selecting more values.
  * @type {React.ComponentType<{readonly label?: string, readonly name?: string} & React.ClassAttributes<unknown>>}
  */
-const RadioButton = React.forwardRef<HTMLInputElement, Props>(({ label = '', name, ...etcProps }, ref) => (
-  <Base>
-    <CaptureArea>
-      <Input {...etcProps} ref={ref} name={name} type="radio" />
-      <IndicatorWrapper>
-        <Border />
-        <Indicator />
-      </IndicatorWrapper>
-      {typeof label! !== 'undefined' && label !== null && ' '}
-      <Label>
-        <LabelContent>{stringify(label)}</LabelContent>
-      </Label>
-    </CaptureArea>
-  </Base>
-))
+const RadioButton = React.forwardRef<HTMLInputElement, Props>(
+  (
+    { label = '', name, ...etcProps },
+    ref
+  ) => (
+    <Base>
+      <CaptureArea>
+        <Input {...etcProps} ref={ref} name={name} type="radio" />
+        <IndicatorWrapper>
+          <Border />
+          <Indicator />
+        </IndicatorWrapper>
+        {typeof label! !== 'undefined' && label !== null && ' '}
+        <Label>
+          <LabelContent>{stringify(label)}</LabelContent>
+        </Label>
+      </CaptureArea>
+    </Base>
+  )
+)
 
 RadioButton.propTypes = propTypes
 
diff --git a/lib/components/Select/Select.test.tsx b/lib/components/Select/Select.test.tsx
index 9caf497..8e61a09 100644
--- a/lib/components/Select/Select.test.tsx
+++ b/lib/components/Select/Select.test.tsx
@@ -1,3 +1,6 @@
+/// <reference types="jest-enzyme" />
+/// <reference path="../../../utilities/jest/extensions.ts" />
+
 import * as fc from 'fast-check'
 import * as Enzyme from 'enzyme'
 import * as Axe from 'jest-axe'
@@ -68,33 +71,6 @@ it('should render a hint for describing valid input values', () => {
   )
 })
 
-describe('on being declared a block component', () => {
-  const BLOCK_DISPLAYS = ['block', 'grid', 'flex', 'table']
-
-  it('should render the base element fullwidth', () => {
-    const wrapper = Enzyme.shallow(<Select block />)
-
-    expect(BLOCK_DISPLAYS).toContain(wrapper.find('div').prop('style')!.display)
-  })
-
-  it('should render the input fullwidth', () => {
-    const wrapper = Enzyme.shallow(<Select block />)
-
-    expect(wrapper.find('label').find('select')).toHaveStyle('width', '100%')
-  })
-
-  it('should render the input as block element', () => {
-    const wrapper = Enzyme.shallow(<Select block />)
-
-    expect(BLOCK_DISPLAYS).toContain(
-      wrapper
-        .find('label')
-        .find('select')
-        .prop('style')!.display,
-    )
-  })
-})
-
 it('should render as half-opaque when disabled', () => {
   const wrapper = Enzyme.shallow(<Select disabled />)
 
diff --git a/lib/components/Select/Select.tsx b/lib/components/Select/Select.tsx
index 5b03510..cfd36c6 100644
--- a/lib/components/Select/Select.tsx
+++ b/lib/components/Select/Select.tsx
@@ -36,10 +36,10 @@ const SECONDARY_TEXT_SIZES: SizeMap<string | number> = {
 }
 
 const ComponentBase = styled('div')({
-  'position': 'relative',
-  'borderRadius': '0.25rem',
-  'fontFamily': 'var(--font-family-base)',
-  'maxWidth': '100%',
+  position: 'relative',
+  borderRadius: '0.25rem',
+  fontFamily: 'var(--font-family-base)',
+  maxWidth: '100%',
   ':focus-within': {
     '--color-accent': 'var(--color-active, Highlight)',
   },
@@ -76,21 +76,22 @@ const LabelWrapper = styled('span')({
 LabelWrapper.displayName = 'span'
 
 const Input = styled('select')({
-  'backgroundColor': 'var(--color-bg, white)',
-  'color': 'var(--color-fg, black)',
-  'appearance': 'none',
-  'boxSizing': 'border-box',
-  'position': 'relative',
-  'border': 0,
-  'paddingLeft': '1rem',
-  'margin': 0,
-  'font': 'inherit',
-  'minHeight': '4rem',
-  'minWidth': '16rem',
-  'maxWidth': '100%',
-  'zIndex': 1,
-  'cursor': 'pointer',
-  'transitionProperty': 'background-color, color',
+  display: 'block',
+  backgroundColor: 'var(--color-bg, white)',
+  color: 'var(--color-fg, black)',
+  appearance: 'none',
+  boxSizing: 'border-box',
+  position: 'relative',
+  border: 0,
+  paddingLeft: '1rem',
+  margin: 0,
+  font: 'inherit',
+  minHeight: '4rem',
+  minWidth: '8rem',
+  maxWidth: '100%',
+  zIndex: 1,
+  cursor: 'pointer',
+  transitionProperty: 'background-color, color',
   ':focus': {
     outline: 0,
   },
@@ -106,20 +107,20 @@ const Input = styled('select')({
 Input.displayName = 'select'
 
 const Border = styled('span')({
-  'borderColor': 'var(--color-accent, blue)',
-  'boxSizing': 'border-box',
-  'display': 'inline-block',
-  'borderWidth': '0.125rem',
-  'borderStyle': 'solid',
-  'position': 'absolute',
-  'top': 0,
-  'left': 0,
-  'width': '100%',
-  'height': '100%',
-  'borderRadius': 'inherit',
-  'zIndex': 2,
-  'pointerEvents': 'none',
-  'transitionProperty': 'border-color',
+  borderColor: 'var(--color-accent, blue)',
+  boxSizing: 'border-box',
+  display: 'inline-block',
+  borderWidth: '0.125rem',
+  borderStyle: 'solid',
+  position: 'absolute',
+  top: 0,
+  left: 0,
+  width: '100%',
+  height: '100%',
+  borderRadius: 'inherit',
+  zIndex: 2,
+  pointerEvents: 'none',
+  transitionProperty: 'border-color',
   '::before': {
     position: 'absolute',
     top: 0,
@@ -188,10 +189,6 @@ const propTypes = {
    * Size of the component.
    */
   size: PropTypes.oneOf<Size>(['small', 'medium', 'large']),
-  /**
-   * Should the component take up the remaining space parallel to the content flow?
-   */
-  block: PropTypes.bool,
   /**
    * Can multiple values be selected?
    */
@@ -208,22 +205,13 @@ const propTypes = {
 
 type Props = PropTypes.InferProps<typeof propTypes>
 
-/**
- * Component for selecting values from a larger number of options.
- * @see {@link Checkbox} for a similar component on selecting values among very few choices.
- * @see {@link RadioButton} for a similar component on selecting a single value among very few choices.
- * @type {React.ComponentType<{readonly label?: string, readonly hint?: string, readonly className?: string, readonly
- *   size?: 'small' | 'medium' | 'large', readonly multiple?: boolean, readonly block?: boolean} &
- *   React.ClassAttributes<unknown>>}
- */
 const Select = React.forwardRef<HTMLSelectElement, Props>(
   (
     {
       label = '',
       className = '',
       hint = '',
-      size: sizeProp = 'medium',
-      block = false,
+      size = 'medium',
       multiple = false,
       disabled = false,
       style = {},
@@ -231,11 +219,9 @@ const Select = React.forwardRef<HTMLSelectElement, Props>(
     },
     ref,
   ) => {
-    const size = sizeProp as Size
     return (
       <ComponentBase
         style={{
-          display: block ? 'block' : 'inline-block',
           opacity: disabled ? 0.5 : undefined,
         }}
       >
@@ -259,10 +245,8 @@ const Select = React.forwardRef<HTMLSelectElement, Props>(
             multiple={multiple!}
             style={{
               ...style,
-              display: block ? 'block' : 'inline-block',
               verticalAlign: 'top',
               fontSize: INPUT_FONT_SIZES[size!],
-              width: block || multiple ? '100%' : undefined,
               height: multiple ? undefined : MIN_HEIGHTS[size!],
               minHeight: MIN_HEIGHTS[size!],
               resize: multiple ? 'vertical' : undefined,
diff --git a/lib/components/Slider/Slider.test.tsx b/lib/components/Slider/Slider.test.tsx
index 9bb2c30..a710259 100644
--- a/lib/components/Slider/Slider.test.tsx
+++ b/lib/components/Slider/Slider.test.tsx
@@ -1,3 +1,6 @@
+/// <reference types="jest-enzyme" />
+/// <reference path="../../../utilities/jest/extensions.ts" />
+
 import * as fc from 'fast-check'
 import * as Enzyme from 'enzyme'
 import * as React from 'react'
diff --git a/lib/components/Slider/Slider.tsx b/lib/components/Slider/Slider.tsx
index e2bc111..8990f58 100644
--- a/lib/components/Slider/Slider.tsx
+++ b/lib/components/Slider/Slider.tsx
@@ -5,9 +5,9 @@ import styled from 'styled-components'
 import stringify from '../../services/stringify'
 
 const Wrapper = styled('div')({
-  'position': 'relative',
-  'display': 'inline-block',
-  'verticalAlign': 'top',
+  position: 'relative',
+  display: 'inline-block',
+  verticalAlign: 'top',
   ':focus-within': {
     '--color-accent': 'var(--color-active, Highlight)',
   },
@@ -16,10 +16,10 @@ const Wrapper = styled('div')({
 Wrapper.displayName = 'div'
 
 const Base = styled(ReachSlider.SliderInput)({
-  'boxSizing': 'border-box',
-  'position': 'absolute',
-  'bottom': 0,
-  'right': 0,
+  boxSizing: 'border-box',
+  position: 'absolute',
+  bottom: 0,
+  right: 0,
   ':active': {
     cursor: 'grabbing',
   },
@@ -28,10 +28,10 @@ const Base = styled(ReachSlider.SliderInput)({
 Base.displayName = 'input'
 
 const Track = styled(ReachSlider.SliderTrack)({
-  'borderRadius': '0.125rem',
-  'position': 'relative',
-  'width': '100%',
-  'height': '100%',
+  borderRadius: '0.125rem',
+  position: 'relative',
+  width: '100%',
+  height: '100%',
   '::before': {
     display: 'block',
     position: 'absolute',
@@ -45,15 +45,15 @@ const Track = styled(ReachSlider.SliderTrack)({
 })
 
 const Handle = styled(ReachSlider.SliderHandle)({
-  'cursor': 'grab',
-  'width': '1.25rem',
-  'height': '1.25rem',
-  'backgroundColor': 'var(--color-accent, blue)',
-  'borderRadius': '50%',
-  'zIndex': 1,
-  'transformOrigin': 'center',
-  'outline': 0,
-  'position': 'relative',
+  cursor: 'grab',
+  width: '1.25rem',
+  height: '1.25rem',
+  backgroundColor: 'var(--color-accent, blue)',
+  borderRadius: '50%',
+  zIndex: 1,
+  transformOrigin: 'center',
+  outline: 0,
+  position: 'relative',
   '::before': {
     position: 'absolute',
     top: 0,
@@ -113,12 +113,12 @@ const LabelWrapper = styled('span')({
 LabelWrapper.displayName = 'span'
 
 const FallbackTrack = styled('span')({
-  'padding': '1.875rem 0.75rem 0.875rem',
-  'boxSizing': 'border-box',
-  'position': 'absolute',
-  'top': 0,
-  'left': 0,
-  'pointerEvents': 'none',
+  padding: '1.875rem 0.75rem 0.875rem',
+  boxSizing: 'border-box',
+  position: 'absolute',
+  top: 0,
+  left: 0,
+  pointerEvents: 'none',
   '::before': {
     display: 'block',
     content: "''",
@@ -131,17 +131,17 @@ const FallbackTrack = styled('span')({
 })
 
 const FallbackSlider = styled('input')({
-  'boxSizing': 'border-box',
-  'backgroundColor': 'transparent',
-  'verticalAlign': 'top',
-  'margin': 0,
-  'width': '100%',
-  'height': '2rem',
-  'marginTop': '1rem',
-  'appearance': 'none',
-  'outline': 0,
-  'position': 'absolute',
-  'left': 0,
+  boxSizing: 'border-box',
+  backgroundColor: 'transparent',
+  verticalAlign: 'top',
+  margin: 0,
+  width: '100%',
+  height: '2rem',
+  marginTop: '1rem',
+  appearance: 'none',
+  outline: 0,
+  position: 'absolute',
+  left: 0,
   '::-moz-focus-inner': {
     outline: 0,
     border: 0,
diff --git a/lib/components/TextInput/TextInput.test.tsx b/lib/components/TextInput/TextInput.test.tsx
index 06a48a9..554361d 100644
--- a/lib/components/TextInput/TextInput.test.tsx
+++ b/lib/components/TextInput/TextInput.test.tsx
@@ -1,3 +1,6 @@
+/// <reference types="jest-enzyme" />
+/// <reference path="../../../utilities/jest/extensions.ts" />
+
 import * as fc from 'fast-check'
 import * as Enzyme from 'enzyme'
 import * as Axe from 'jest-axe'
@@ -64,13 +67,12 @@ it('should render as half-opaque when disabled', () => {
 })
 
 describe.each`
-  multiline | inputWidth   | tag
-  ${false}  | ${'100%'}    | ${'input'}
-  ${true}   | ${undefined} | ${'textarea'}
-`('on multiline (multiline=$multiline)', ({ tag: rawTag, multiline: rawMultiline, inputWidth: rawInputWidth }) => {
+  multiline | tag
+  ${false}  | ${'input'}
+  ${true}   | ${'textarea'}
+`('on multiline (multiline=$multiline)', ({ tag: rawTag, multiline: rawMultiline, }) => {
   const tag = rawTag as string
   const multiline = rawMultiline as boolean
-  const inputWidth = rawInputWidth as string
 
   it('should render an element to input text on', () => {
     const wrapper = Enzyme.shallow(<TextInput multiline={multiline} />)
@@ -99,39 +101,6 @@ describe.each`
         .prop('style')!.paddingRight,
     ).not.toBe('1rem')
   })
-
-  describe('on being declared a block component', () => {
-    const BLOCK_DISPLAYS = ['block', 'grid', 'flex', 'table']
-
-    it('should render the base element fullwidth', () => {
-      const wrapper = Enzyme.shallow(<TextInput multiline={multiline} block />)
-
-      const { display } = wrapper.find('div').prop('style')!
-
-      expect(BLOCK_DISPLAYS).toContain(display)
-    })
-
-    it('should render the input fullwidth', () => {
-      const wrapper = Enzyme.shallow(<TextInput multiline={multiline} block />)
-
-      if (tag === 'textarea') {
-        expect(wrapper.find('label').find(tag)).not.toHaveStyle('width')
-      } else {
-        expect(wrapper.find('label').find(tag)).toHaveStyle('width', inputWidth)
-      }
-    })
-
-    it('should render the input as block element', () => {
-      const wrapper = Enzyme.shallow(<TextInput multiline={multiline} block />)
-
-      const { display } = wrapper
-        .find('label')
-        .find(tag)
-        .prop('style')!
-
-      expect(BLOCK_DISPLAYS).toContain(display)
-    })
-  })
 })
 
 describe('on aiding user input', () => {
diff --git a/lib/components/TextInput/TextInput.tsx b/lib/components/TextInput/TextInput.tsx
index 6a63d37..3f829a8 100644
--- a/lib/components/TextInput/TextInput.tsx
+++ b/lib/components/TextInput/TextInput.tsx
@@ -3,7 +3,6 @@ import * as PropTypes from 'prop-types'
 import styled from 'styled-components'
 import stringify from '../../services/stringify'
 import { Size, SizeMap } from '../../services/utilities'
-import { ChangeEvent, InputHTMLAttributes, TextareaHTMLAttributes } from 'react'
 
 const MIN_HEIGHTS: SizeMap<string | number> = {
   small: '2.5rem',
@@ -36,10 +35,10 @@ const SECONDARY_TEXT_SIZES: SizeMap<string | number> = {
 }
 
 const ComponentBase = styled('div')({
-  'position': 'relative',
-  'borderRadius': '0.25rem',
-  'fontFamily': 'var(--font-family-base)',
-  'maxWidth': '100%',
+  position: 'relative',
+  borderRadius: '0.25rem',
+  fontFamily: 'var(--font-family-base)',
+  maxWidth: '100%',
   ':focus-within': {
     '--color-accent': 'var(--color-active, Highlight)',
   },
@@ -78,20 +77,20 @@ const LabelWrapper = styled('span')({
 LabelWrapper.displayName = 'span'
 
 const Border = styled('span')({
-  'borderColor': 'var(--color-accent, blue)',
-  'boxSizing': 'border-box',
-  'display': 'inline-block',
-  'borderWidth': '0.125rem',
-  'borderStyle': 'solid',
-  'position': 'absolute',
-  'top': 0,
-  'left': 0,
-  'width': '100%',
-  'height': '100%',
-  'borderRadius': 'inherit',
-  'zIndex': 2,
-  'pointerEvents': 'none',
-  'transitionProperty': 'border-color',
+  borderColor: 'var(--color-accent, blue)',
+  boxSizing: 'border-box',
+  display: 'inline-block',
+  borderWidth: '0.125rem',
+  borderStyle: 'solid',
+  position: 'absolute',
+  top: 0,
+  left: 0,
+  width: '100%',
+  height: '100%',
+  borderRadius: 'inherit',
+  zIndex: 2,
+  pointerEvents: 'none',
+  transitionProperty: 'border-color',
   '::before': {
     position: 'absolute',
     top: 0,
@@ -109,23 +108,24 @@ const Border = styled('span')({
 })
 
 const Input = styled('input')({
-  'backgroundColor': 'var(--color-bg, white)',
-  'color': 'var(--color-fg, black)',
-  'verticalAlign': 'top',
-  'paddingTop': 0,
-  'paddingBottom': 0,
-  'boxSizing': 'border-box',
-  'position': 'relative',
-  'border': 0,
-  'borderRadius': 'inherit',
-  'paddingLeft': '1rem',
-  'margin': 0,
-  'font': 'inherit',
-  'minHeight': '4rem',
-  'minWidth': '16rem',
-  'maxWidth': '100%',
-  'zIndex': 1,
-  'transitionProperty': 'background-color, color',
+  display: 'block',
+  backgroundColor: 'var(--color-bg, white)',
+  color: 'var(--color-fg, black)',
+  verticalAlign: 'top',
+  paddingTop: 0,
+  paddingBottom: 0,
+  boxSizing: 'border-box',
+  position: 'relative',
+  border: 0,
+  borderRadius: 'inherit',
+  paddingLeft: '1rem',
+  margin: 0,
+  font: 'inherit',
+  minHeight: '4rem',
+  minWidth: '8rem',
+  maxWidth: '100%',
+  zIndex: 1,
+  transitionProperty: 'background-color, color',
   ':focus': {
     outline: 0,
     color: 'var(--color-fg, black)',
@@ -138,22 +138,23 @@ const Input = styled('input')({
 Input.displayName = 'input'
 
 const TextArea = styled('textarea')({
-  'backgroundColor': 'var(--color-bg, white)',
-  'color': 'var(--color-fg, black)',
-  'verticalAlign': 'top',
-  'width': '100%',
-  'boxSizing': 'border-box',
-  'position': 'relative',
-  'border': 0,
-  'borderRadius': 'inherit',
-  'paddingLeft': '1rem',
-  'margin': 0,
-  'font': 'inherit',
-  'minHeight': '4rem',
-  'minWidth': '16rem',
-  'maxWidth': '100%',
-  'zIndex': 1,
-  'transitionProperty': 'background-color, color',
+  display: 'block',
+  backgroundColor: 'var(--color-bg, white)',
+  color: 'var(--color-fg, black)',
+  verticalAlign: 'top',
+  width: '100%',
+  boxSizing: 'border-box',
+  position: 'relative',
+  border: 0,
+  borderRadius: 'inherit',
+  paddingLeft: '1rem',
+  margin: 0,
+  font: 'inherit',
+  minHeight: '4rem',
+  minWidth: '16rem',
+  maxWidth: '100%',
+  zIndex: 1,
+  transitionProperty: 'background-color, color',
   ':focus': {
     outline: 0,
   },
@@ -216,10 +217,6 @@ const propTypes = {
    * Additional description, usually graphical, indicating the nature of the component's value.
    */
   indicator: PropTypes.node,
-  /**
-   * Should the component take up the remaining space parallel to the content flow?
-   */
-  block: PropTypes.bool,
   /**
    * Should the component accept multiple lines of input?
    */
@@ -240,12 +237,6 @@ const propTypes = {
 
 type Props = PropTypes.InferProps<typeof propTypes>
 
-/**
- * Component for inputting textual values.
- * @type {React.ComponentType<{readonly label?: string, readonly hint?: string, readonly multiline?: boolean, readonly
- *   className?: string, readonly indicator?: *, readonly size?: 'small' | 'medium' | 'large', readonly block?:
- *   boolean} & React.ClassAttributes<unknown>>}
- */
 const TextInput = React.forwardRef<HTMLInputElement | HTMLTextAreaElement, Props>(
   (
     {
@@ -253,92 +244,84 @@ const TextInput = React.forwardRef<HTMLInputElement | HTMLTextAreaElement, Props
       className = '',
       hint = '',
       indicator = null,
-      size: sizeProp = 'medium',
-      block = false,
+      size = 'medium',
       multiline = false,
       disabled = false,
       autoResize = false,
       placeholder = '',
     },
     ref,
-  ) => {
-    const size: Size = sizeProp as Size
-    return (
-      <ComponentBase
-        style={{
-          display: block ? 'block' : 'inline-block',
-          opacity: disabled ? 0.5 : undefined,
-        }}
-      >
-        <Border />
-        <CaptureArea className={className!}>
-          <LabelWrapper
-            style={{
-              paddingTop: LABEL_VERTICAL_PADDING_SIZES[size!],
-              paddingBottom: LABEL_VERTICAL_PADDING_SIZES[size!],
-              paddingRight: indicator ? MIN_HEIGHTS[size!] : '0.5rem',
-              fontSize: SECONDARY_TEXT_SIZES[size!],
-            }}
-          >
-            {stringify(label)}
-          </LabelWrapper>
-          {stringify(label).length > 0 && ' '}
-          {multiline && (
-            <TextArea
-              placeholder={placeholder!}
-              ref={ref as React.Ref<HTMLTextAreaElement>}
-              disabled={disabled!}
-              style={{
-                display: block ? 'block' : 'inline-block',
-                fontSize: INPUT_FONT_SIZES[size!],
-                minHeight: MIN_HEIGHTS[size!],
-                paddingTop: VERTICAL_PADDING_SIZES[size!],
-                paddingBottom: VERTICAL_PADDING_SIZES[size!],
-                paddingRight: indicator ? MIN_HEIGHTS[size!] : '1rem',
-              }}
-            />
-          )}
-          {!multiline && (
-            <Input
-              placeholder={placeholder!}
-              ref={ref as React.Ref<HTMLInputElement>}
-              disabled={disabled!}
-              style={{
-                display: block ? 'block' : 'inline-block',
-                fontSize: INPUT_FONT_SIZES[size!],
-                width: block ? '100%' : undefined,
-                minHeight: MIN_HEIGHTS[size!],
-                paddingRight: indicator ? MIN_HEIGHTS[size!] : '1rem',
-              }}
-            />
-          )}
-        </CaptureArea>
-        {stringify(hint).length > 0 && ' '}
-        {stringify(hint).length > 0 && (
-          <HintWrapper
+  ) => (
+    <ComponentBase
+      style={{
+        opacity: disabled ? 0.5 : undefined,
+      }}
+    >
+      <Border />
+      <CaptureArea className={className!}>
+        <LabelWrapper
+          style={{
+            paddingTop: LABEL_VERTICAL_PADDING_SIZES[size!],
+            paddingBottom: LABEL_VERTICAL_PADDING_SIZES[size!],
+            paddingRight: indicator ? MIN_HEIGHTS[size!] : '0.5rem',
+            fontSize: SECONDARY_TEXT_SIZES[size!],
+          }}
+        >
+          {stringify(label)}
+        </LabelWrapper>
+        {stringify(label).length > 0 && ' '}
+        {multiline && (
+          <TextArea
+            placeholder={placeholder!}
+            ref={ref as React.Ref<HTMLTextAreaElement>}
+            disabled={disabled!}
             style={{
-              paddingTop: LABEL_VERTICAL_PADDING_SIZES[size!],
-              paddingBottom: LABEL_VERTICAL_PADDING_SIZES[size!],
+              fontSize: INPUT_FONT_SIZES[size!],
+              minHeight: MIN_HEIGHTS[size!],
+              paddingTop: VERTICAL_PADDING_SIZES[size!],
+              paddingBottom: VERTICAL_PADDING_SIZES[size!],
               paddingRight: indicator ? MIN_HEIGHTS[size!] : '1rem',
-              fontSize: SECONDARY_TEXT_SIZES[size!],
             }}
-          >
-            ({stringify(hint)})
-          </HintWrapper>
+          />
         )}
-        {(indicator as PropTypes.ReactComponentLike) && (
-          <IndicatorWrapper
+        {!multiline && (
+          <Input
+            placeholder={placeholder!}
+            ref={ref as React.Ref<HTMLInputElement>}
+            disabled={disabled!}
             style={{
-              width: MIN_HEIGHTS[size!],
-              height: MIN_HEIGHTS[size!],
+              fontSize: INPUT_FONT_SIZES[size!],
+              minHeight: MIN_HEIGHTS[size!],
+              paddingRight: indicator ? MIN_HEIGHTS[size!] : '1rem',
             }}
-          >
-            {indicator}
-          </IndicatorWrapper>
+          />
         )}
-      </ComponentBase>
-    )
-  },
+      </CaptureArea>
+      {stringify(hint).length > 0 && ' '}
+      {stringify(hint).length > 0 && (
+        <HintWrapper
+          style={{
+            paddingTop: LABEL_VERTICAL_PADDING_SIZES[size!],
+            paddingBottom: LABEL_VERTICAL_PADDING_SIZES[size!],
+            paddingRight: indicator ? MIN_HEIGHTS[size!] : '1rem',
+            fontSize: SECONDARY_TEXT_SIZES[size!],
+          }}
+        >
+          ({stringify(hint)})
+        </HintWrapper>
+      )}
+      {(indicator as PropTypes.ReactComponentLike) && (
+        <IndicatorWrapper
+          style={{
+            width: MIN_HEIGHTS[size!],
+            height: MIN_HEIGHTS[size!],
+          }}
+        >
+          {indicator}
+        </IndicatorWrapper>
+      )}
+    </ComponentBase>
+  ),
 )
 
 TextInput.propTypes = propTypes
diff --git a/lib/index.test.ts b/lib/index.test.ts
new file mode 100644
index 0000000..7d5d7ce
--- /dev/null
+++ b/lib/index.test.ts
@@ -0,0 +1,26 @@
+/// <reference types="jest-enzyme" />
+/// <reference path="../utilities/jest/extensions.ts" />
+
+import * as T from './index'
+
+const Tesseract = T as Record<string, unknown>
+
+describe.each`
+  name              | componentId
+  ${'button'}       | ${'Button'}
+  ${'checkbox'}     | ${'Checkbox'}
+  ${'icon'}         | ${'Icon'}
+  ${'radio button'} | ${'RadioButton'}
+  ${'select'}       | ${'Select'}
+  ${'slider'}       | ${'Slider'}
+  ${'text input'}   | ${'TextInput'}
+`('on $name component', ({ componentId, }) => {
+  const theComponentId = componentId as string
+  it('should exist', () => {
+    expect(Tesseract[theComponentId]).toBeDefined()
+  })
+
+  it('should be a component', () => {
+    expect(Tesseract[theComponentId]).toBeComponent()
+  })
+})
diff --git a/lib/services/isEmpty.test.ts b/lib/services/isEmpty.test.ts
index 88b656d..4837494 100644
--- a/lib/services/isEmpty.test.ts
+++ b/lib/services/isEmpty.test.ts
@@ -16,12 +16,9 @@ describe('lib/services/isEmpty', () => {
 
   it('should return a boolean value', () => {
     fc.assert(
-      fc.property(
-        fc.anything(),
-        v => {
-          expect(typeof isEmpty(v)).toBe('boolean')
-        }
-      )
+      fc.property(fc.anything(), (v) => {
+        expect(typeof isEmpty(v)).toBe('boolean')
+      }),
     )
   })
 
@@ -36,12 +33,9 @@ describe('lib/services/isEmpty', () => {
 
     it('should return `false` on an argument with value that is neither `undefined` nor `null`', () => {
       fc.assert(
-        fc.property(
-          fc.anything().filter(v => typeof v !== 'undefined' && v !== null),
-          v => {
-            expect(isEmpty(v)).toBe(false)
-          }
-        )
+        fc.property(fc.anything().filter((v) => typeof v !== 'undefined' && v !== null), (v) => {
+          expect(isEmpty(v)).toBe(false)
+        }),
       )
     })
   })
diff --git a/lib/services/isEmpty.ts b/lib/services/isEmpty.ts
index b0b72f9..60ba2e2 100644
--- a/lib/services/isEmpty.ts
+++ b/lib/services/isEmpty.ts
@@ -2,9 +2,6 @@ interface IsEmpty {
   (v: any): boolean
 }
 
-const isEmpty: IsEmpty = v => (
-  typeof v === 'undefined'
-  || v === null
-)
+const isEmpty: IsEmpty = (v) => typeof v === 'undefined' || v === null
 
 export default isEmpty
diff --git a/lib/services/splitValueAndUnit.test.ts b/lib/services/splitValueAndUnit.test.ts
index 8ca9483..5e0027e 100644
--- a/lib/services/splitValueAndUnit.test.ts
+++ b/lib/services/splitValueAndUnit.test.ts
@@ -1,5 +1,5 @@
 import * as fc from 'fast-check'
-import splitValueAndUnit, { Unit, } from './splitValueAndUnit'
+import splitValueAndUnit, { Unit } from './splitValueAndUnit'
 
 it('should exist', () => {
   expect(splitValueAndUnit).toBeDefined()
@@ -15,46 +15,33 @@ it('should accept 1 argument', () => {
 
 it('should throw a TypeError when invalid values are supplied', () => {
   fc.assert(
-    fc.property(
-      fc.anything().filter(s => !['string', 'number'].includes(typeof s)),
-      s => {
-        expect(() => splitValueAndUnit(s)).toThrowError(TypeError)
-      }
-    )
+    fc.property(fc.anything().filter((s) => !['string', 'number'].includes(typeof s)), (s) => {
+      expect(() => splitValueAndUnit(s)).toThrowError(TypeError)
+    }),
   )
 })
 
 it('should parse valid CSS numbers', () => {
   fc.assert(
     fc.property(
-      fc.tuple(
-        fc.float(),
-        fc.oneof<Unit>(
-          fc.constant('px'),
-          fc.constant('rem'),
-          fc.constant('%'),
-        )
-      ),
-      ([magnitude, unit,]) => {
+      fc.tuple(fc.float(), fc.oneof<Unit>(fc.constant('px'), fc.constant('rem'), fc.constant('%'))),
+      ([magnitude, unit]) => {
         expect(splitValueAndUnit(`${magnitude}${unit}`)).toEqual({
           magnitude,
           unit,
         })
-      }
-    )
+      },
+    ),
   )
 })
 
 it('should parse numbers as CSS numbers with implicit pixel units', () => {
   fc.assert(
-    fc.property(
-      fc.float(),
-      magnitude => {
-        expect(splitValueAndUnit(magnitude)).toEqual({
-          magnitude,
-          unit: 'px',
-        })
-      }
-    )
+    fc.property(fc.float(), (magnitude) => {
+      expect(splitValueAndUnit(magnitude)).toEqual({
+        magnitude,
+        unit: 'px',
+      })
+    }),
   )
 })
diff --git a/lib/services/splitValueAndUnit.ts b/lib/services/splitValueAndUnit.ts
index 07723c5..812b3c9 100644
--- a/lib/services/splitValueAndUnit.ts
+++ b/lib/services/splitValueAndUnit.ts
@@ -1,15 +1,15 @@
 export type Unit = 'px' | '%' | 'rem'
 
 export interface ValueAndUnit {
-  magnitude: number,
-  unit: Unit,
+  magnitude: number
+  unit: Unit
 }
 
 interface SplitValueAndUnit {
   (value: any): ValueAndUnit
 }
 
-const splitValueAndUnit: SplitValueAndUnit = value => {
+const splitValueAndUnit: SplitValueAndUnit = (value) => {
   if (!['string', 'number'].includes(typeof value)) {
     throw TypeError('Argument must be a valid CSS number')
   }
diff --git a/lib/services/stringify.test.ts b/lib/services/stringify.test.ts
index 180b62b..7af7924 100644
--- a/lib/services/stringify.test.ts
+++ b/lib/services/stringify.test.ts
@@ -16,12 +16,9 @@ it('should accept 1 argument', () => {
 
 it('should return a string value', () => {
   fc.assert(
-    fc.property(
-      fc.anything(),
-      v => {
-        expect(stringify(v)).toBeString()
-      }
-    )
+    fc.property(fc.anything(), (v) => {
+      expect(stringify(v)).toBeString()
+    }),
   )
 })
 
@@ -36,58 +33,42 @@ describe('on arguments', () => {
 
   it('should stringify non-objects', () => {
     fc.assert(
-      fc.property(
-        fcArb.nonObject(),
-        fc.string(),
-        v => {
-          expect(stringify(v)).toBe(String(v))
-        }
-      )
+      fc.property(fcArb.nonObject(), fc.string(), (v) => {
+        expect(stringify(v)).toBe(String(v))
+      }),
     )
   })
 
   it('should stringify objects', () => {
     fc.assert(
-      fc.property(
-        fc.object(),
-        v => {
-          expect(stringify(v)).toBe(JSON.stringify(v))
-        }
-      )
+      fc.property(fc.object(), (v) => {
+        expect(stringify(v)).toBe(JSON.stringify(v))
+      }),
     )
   })
 
   describe('on arrays', () => {
     it('should stringify empty arrays', () => {
       fc.assert(
-        fc.property(
-          fc.array(fcArb.nonObject(), 0),
-          v => {
-            expect(stringify(v)).toBe('')
-          }
-        )
+        fc.property(fc.array(fcArb.nonObject(), 0), (v) => {
+          expect(stringify(v)).toBe('')
+        }),
       )
     })
 
     it('should stringify arrays with single values', () => {
       fc.assert(
-        fc.property(
-          fc.array(fcArb.nonObject(), 1, 1),
-          v => {
-            expect(stringify(v)).toBe(String(v[0]))
-          }
-        )
+        fc.property(fc.array(fcArb.nonObject(), 1, 1), (v) => {
+          expect(stringify(v)).toBe(String(v[0]))
+        }),
       )
     })
 
     it('should stringify arrays with 2 or more values', () => {
       fc.assert(
-        fc.property(
-          fc.array(fcArb.nonObject(), 2, 20),
-          v => {
-            expect(stringify(v)).toContain(',')
-          }
-        )
+        fc.property(fc.array(fcArb.nonObject(), 2, 20), (v) => {
+          expect(stringify(v)).toContain(',')
+        }),
       )
     })
   })
diff --git a/lib/services/stringify.ts b/lib/services/stringify.ts
index e0b7833..e34bbc6 100644
--- a/lib/services/stringify.ts
+++ b/lib/services/stringify.ts
@@ -1,18 +1,18 @@
 import isEmpty from './isEmpty'
 
 interface Stringify {
-  (v: any): string,
+  (v: any): string
 }
 
-const stringify: Stringify = v => {
+const stringify: Stringify = (v) => {
   if (isEmpty(v)) {
     return ''
   }
 
   if (Array.isArray(v)) {
     return v
-      .filter(v => !isEmpty(v))
-      .map(v => stringify(v))
+      .filter((v) => !isEmpty(v))
+      .map((v) => stringify(v))
       .join(',')
   }
 
diff --git a/package.json b/package.json
index c8ccf74..abd94f2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tesseract-design/react-common",
-  "version": "0.0.0",
+  "version": "0.0.1",
   "description": "Common front-end components for Web using the Tesseract design system, written in React.",
   "directories": {
     "lib": "dist"