Split [pypi] tests (#3704)

* Split [pypi] tests

* Changed filenames to match previous class names

services/pypi/pypi-implementation.tester.js

@@ -0,0 +1,22 @@
+'use strict'
+
+const t = (module.exports = require('../tester').createServiceTester())
+
+t.create('implementation (valid, package version in request)')
+  .get('/beehive/1.0.json')
+  .expectBadge({ label: 'implementation', message: 'cpython | jython | pypy' })
+
+t.create('implementation (valid, no package version specified)')
+  .get('/numpy.json')
+  .expectBadge({ label: 'implementation', message: 'cpython' })
+
+t.create('implementation (not specified)')
+  .get('/chai/1.1.2.json')
+  .expectBadge({ label: 'implementation', message: 'cpython' })
+
+t.create('implementation (invalid)')
+  .get('/not-a-package.json')
+  .expectBadge({
+    label: 'implementation',
+    message: 'package or version not found',
+  })