From da306cdb0f3125d0b9682d11c2ec007cdfd1746f Mon Sep 17 00:00:00 2001
From: Nathan Friend <nathan@gitlab.com>
Date: Mon, 12 Aug 2019 15:22:58 -0400
Subject: Convert spec/javascripts/environments/*rollback* tests to Jest

This commit converts two Jasmine tests into Jest tests.
---
 spec/frontend/matchers.js | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 spec/frontend/matchers.js

(limited to 'spec/frontend/matchers.js')

diff --git a/spec/frontend/matchers.js b/spec/frontend/matchers.js
new file mode 100644
index 00000000000..35c362d0bf5
--- /dev/null
+++ b/spec/frontend/matchers.js
@@ -0,0 +1,38 @@
+export default {
+  toHaveSpriteIcon: (element, iconName) => {
+    if (!iconName) {
+      throw new Error('toHaveSpriteIcon is missing iconName argument!');
+    }
+
+    if (!(element instanceof HTMLElement)) {
+      throw new Error(`${element} is not a DOM element!`);
+    }
+
+    const iconReferences = [].slice.apply(element.querySelectorAll('svg use'));
+    const matchingIcon = iconReferences.find(reference =>
+      reference.getAttribute('xlink:href').endsWith(`#${iconName}`),
+    );
+
+    const pass = Boolean(matchingIcon);
+
+    let message;
+    if (pass) {
+      message = `${element.outerHTML} contains the sprite icon "${iconName}"!`;
+    } else {
+      message = `${element.outerHTML} does not contain the sprite icon "${iconName}"!`;
+
+      const existingIcons = iconReferences.map(reference => {
+        const iconUrl = reference.getAttribute('xlink:href');
+        return `"${iconUrl.replace(/^.+#/, '')}"`;
+      });
+      if (existingIcons.length > 0) {
+        message += ` (only found ${existingIcons.join(',')})`;
+      }
+    }
+
+    return {
+      pass,
+      message: () => message,
+    };
+  },
+};
-- 
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