Condense toBeBefore matcher into one file

src/matchers/toBeBefore.js

@@ -0,0 +1,19 @@
+export function toBeBefore(actual, expected) {
+  const { matcherHint, printReceived } = this.utils;
+  const passMessage = () =>
+    matcherHint('.not.toBeBefore', 'received', '') +
+    '\n\n' +
+    `Expected date to be before ${printReceived(actual)} but received:\n` +
+    `  ${printReceived(expected)}`;
+
+  const failMessage = () =>
+    matcherHint('.toBeBefore', 'received', '') +
+    '\n\n' +
+    `Expected date to be before ${printReceived(actual)} but received:\n` +
+    `  ${printReceived(expected)}`;
+
+  const pass = actual < expected;
+  const message = pass ? passMessage : failMessage;
+
+  return { pass, message };
+}

src/matchers/toBeBefore/__snapshots__/index.test.js.snap → test/matchers/__snapshots__/toBeBefore.test.js.snap

@@ -3,13 +3,13 @@
 exports[`.not.toBeBefore fails when given an earlier date 1`] = `
 "<dim>expect(</><red>received</><dim>).not.toBeBefore()</>
 
-Expected date to be before <red>2018-06-02T22:00:00.000Z</> but received:
-  <red>2018-06-01T22:00:00.000Z</>"
+Expected date to be before <red>2018-06-01T22:00:00.000Z</> but received:
+  <red>2018-06-02T22:00:00.000Z</>"
 `;
 
 exports[`.toBeBefore fails when given a later date 1`] = `
 "<dim>expect(</><red>received</><dim>).toBeBefore()</>
 
-Expected date to be before <red>2018-06-01T22:00:00.000Z</> but received:
-  <red>2018-06-02T22:00:00.000Z</>"
+Expected date to be before <red>2018-06-02T22:00:00.000Z</> but received:
+  <red>2018-06-01T22:00:00.000Z</>"
 `;

src/matchers/toBeBefore/index.test.js → test/matchers/toBeBefore.test.js

@@ -1,4 +1,4 @@
-import * as matcher from './';
+import * as matcher from 'src/matchers/toBeBefore';
 
 expect.extend(matcher);