fix: move tests from single directory

.flowconfig

@@ -0,0 +1,2 @@
+ [options]
+  esproposal.export_star_as=enable

.gitignore

@@ -3,6 +3,7 @@ dist/
 es/
 lib/
 coverage/
+__tests__
 .env
 
 npm-debug.log*

jest.config.js

@@ -1,6 +1,6 @@
 module.exports = {
   collectCoverage: false,
-  roots: ['<rootDir>/src'],
+  roots: ['<rootDir>/__tests__'],
   transform: {
     '^.+\\.js$': 'babel-jest',
   },

src/calculators/calc-leading.js

@@ -0,0 +1,4 @@
+// @flow
+
+export const calcLeading = (base: number[], lineHeight: number) =>
+  Math.round(base[0] * lineHeight);

src/calculators/modular-scale/index.js → src/calculators/modular-scale.js

@@ -3,16 +3,14 @@
 //  https://www.modularscale.com/
 //  from https://github.com/modularscale/modularscale.com/blob/master/source/javascripts/_ms.js.erb#L27-L52
 
-import type { Breakpoint } from '../../models';
+import type { Breakpoint } from '../models/breakpoints';
 
-type CalcStartPosition = (number, number[]) => number;
-const calcStartPosition: CalcStartPosition = (step, base) =>
+const calcStartPosition = (step: number, base: number[]) =>
   Math.round(
     (step / base.length - Math.floor(step / base.length)) * base.length,
   );
 
-type CalcFontSize = (number, number[], number) => number;
-const calcFontSize: CalcFontSize = (step, base, ratio) =>
+const calcFontSize = (step: number, base: number[], ratio: number) =>
   Math.pow(ratio, Math.floor(step / base.length));
 
 /* eslint-disable no-param-reassign, no-plusplus */
@@ -32,8 +30,7 @@ const normalizeBases = (base, baseHigh, ratio) => {
 };
 /* eslint-enable */
 
-type ModularScale = (number) => (Breakpoint) => number;
-export const modularScale: ModularScale = (step) => ({ base, ratio }) => {
+export const modularScale = (step: number) => ({ base, ratio }: Breakpoint) => {
   if (base.length === 1) {
     return Math.pow(ratio, step) * parseFloat(base);
   }

src/constants/index.js

@@ -1,51 +1,8 @@
 // @flow
 
+export * as regexes from './regexes';
+export * as ratios from './ratios';
 export const COMMA_AND_NEW_LINE = ',\n'; // postcss
 export const HALF = 0.5;
 export const BROWSER_VIEWPORT_WIDTH = '100vw';
 export const BROWSER_DEFAULT_FONT_SIZE = 16;
-
-// ratios
-export const AUGMENTED_FOURTH = 1.41421;
-export const DOUBLE_OCTAVE = 4;
-export const GOLDEN_SECTION = 1.618034;
-export const MAJOR_ELEVENTH = 2.666666667;
-export const MAJOR_SECOND = 1.125;
-export const MAJOR_SEVENTH = 1.875;
-export const MAJOR_SIXTH = 1.666666667;
-export const MAJOR_TENTH = 2.5;
-export const MAJOR_THIRD = 1.25;
-export const MAJOR_TWELFTH = 3;
-export const MINOR_SECOND = 1.066666667;
-export const MINOR_SEVENTH = 1.777777778;
-export const MINOR_THIRD = 1.2;
-export const OCTAVE = 2;
-export const PERFECT_FIFTH = 1.5;
-export const PERFECT_FOURTH = 1.333333333;
-export const PHI = 1.618034;
-
-// regexes
-export const SPACE_AT_WORD_SPACE = /\sat\s/;
-export const POSITIVE_OR_NEGATIVE_INTEGER_OR_FLOATING_NUMBER_AT_BEGINNING_OF_STRING = /^-?\d+(\.\d+)?$/;
-export const DASH_HYPHEN_WHITESPACE_ANY_CHARACTERS = /[-_\s]+(.)?/g;
-export const FONT_SIZE = /\b\d+(\.\d+)?(px|em)\b/g;
-export const PX_OR_EM_FONT_SIZE_AT_BEGINNING_OF_STRING = /^\d+(\.\d+)?(px|em)\b/g;
-export const PX_OR_EM_FONT_SIZE = /\d+(\.\d+)?(px|em)/;
-export const PX_FONT_SIZE = /\d+(\.\d+)?px/;
-export const SEPARATE_STRING_INTO_WORDS_WITH_CAPITAL_LETTER = /(?=[A-Z])/;
-export const EM_FONT_SIZE = /\d+(\.\d+)?em/;
-export const ALL_CHARACTERS_AFTER_COLON = /:.+\b/; // postcss
-export const ALL_CHARACTERS_BEFORE_COLON = /^\(.+\):?/; // postcss
-export const ALL_ROUND_BRACKETS = /[()]/g; // postcss
-export const AMPERSAND = /&/; // postcss
-export const LAST_COMMA = /,\s*$/; // postcss
-export const LINE_BREAKS_AND_SPACES = /[\n\s]/g; // postcss
-export const REM_FONT_SIZE = /\d+(\.\d+)?rem/; // postcss
-export const REVERCE_BRACKET = /\)/; // postcss
-export const STEP_UNIT = /step/; // postcss
-export const STEP_FUNCTION_WITH_VALUE = /^step\(.+?\)$/; // postcss
-export const STEP_FONT_SIZE_AT_BEGINNING_OF_STRING = /^-?\d+(\.\d+)?step$/; // postcss
-export const FONT_SIZE_PROP = /^font-size$/; // postcss
-export const STEP_WITH_BRACKET = /step\(/; // postcss
-export const EM_FONT_SIZE_AT_BEGINNING_OF_STRING = /^\d+(\.\d+)?em\b/g; // postcss
-export const POSITIVE_OR_NEGATIVE_INTEGER_OR_FLOATING_NUMBER_AT_END_OF_STRING = /-?\b\d+(\.\d+)?\b\s*$/g; // postcss