1 files changed, 21 insertions, 0 deletions
diff --git a/spec/frontend/environment.js b/spec/frontend/environment.js
index d1bc11538a3..29aa416149c 100644
--- a/spec/frontend/environment.js
+++ b/spec/frontend/environment.js
@@ -43,6 +43,9 @@ class CustomEnvironment extends JSDOMEnvironment {
     };
     this.global.IS_EE = IS_EE;
 
+    // Set up global `gl` object
+    this.global.gl = {};
+
     this.rejectedPromises = [];
 
     this.global.promiseRejectionHandler = (error) => {
@@ -67,6 +70,24 @@ class CustomEnvironment extends JSDOMEnvironment {
       getEntriesByName: () => [],
     });
 
+    //
+    // Monaco-related environment variables
+    //
+    this.global.MonacoEnvironment = { globalAPI: true };
+    Object.defineProperty(this.global, 'matchMedia', {
+      writable: true,
+      value: (query) => ({
+        matches: false,
+        media: query,
+        onchange: null,
+        addListener: () => null, // deprecated
+        removeListener: () => null, // deprecated
+        addEventListener: () => null,
+        removeEventListener: () => null,
+        dispatchEvent: () => null,
+      }),
+    });
+
     this.global.PerformanceObserver = class {
       /* eslint-disable no-useless-constructor, no-unused-vars, no-empty-function, class-methods-use-this */
       constructor(callback) {}