🎉 Add test mode

src/TRexAttack.js

@@ -132,6 +132,9 @@ if (utils.isInShellProcess()) {
       const color =
           Clutter.Color.from_string(settings.get_string('claw-scratch-color'))[1];
 
+      // If we are currently performing integration test, the animation uses a fixed seed.
+      const testMode = settings.get_boolean('test-mode');
+
       this.set_shader_source(`
 
         // Inject some common shader snippets.
@@ -141,7 +144,8 @@ if (utils.isInShellProcess()) {
         // See assets/README.md for how this texture was created.
         uniform sampler2D uClawTexture;
 
-        const vec2  SEED            = vec2(${Math.random()}, ${Math.random()});
+        const vec2  SEED            = vec2(${testMode ? 0 : Math.random()}, 
+                                           ${testMode ? 0 : Math.random()});
         const float CLAW_SIZE       = ${settings.get_double('claw-scratch-scale')};
         const float NUM_CLAWS       = ${settings.get_int('claw-scratch-count')};
         const float WARP_INTENSITY  = 1.0 + ${settings.get_double('claw-scratch-warp')};