test: add tests for get-node-text (#307)

Author: DylanPiercey

src/__tests__/get-node-text.js

@@ -0,0 +1,17 @@
+import {getNodeText} from '../get-node-text'
+import {render} from './helpers/test-utils'
+
+test('it prints out the text content of a container', () => {
+  const {container} = render('Hello <!--skipped-->World!')
+  expect(getNodeText(container)).toMatchInlineSnapshot(`"Hello World!"`)
+})
+
+test('it prints the value for submit and button inputs', () => {
+  const {container} = render(
+    '<input type="submit" value="save"><input type="button" value="reset">',
+  )
+
+  expect(getNodeText(container.firstChild)).toMatchInlineSnapshot(`"save"`)
+
+  expect(getNodeText(container.lastChild)).toMatchInlineSnapshot(`"reset"`)
+})