Add a Rep test for Generators

Author: nchevobbe

packages/devtools-reps/src/reps/stubs/grip.js

@@ -977,4 +977,22 @@ stubs.set(`{test: "http://example.com/ some other text"}`, {
   }
 });
 
+stubs.set("Generator", {
+  "type": "object",
+  "actor": "server1.conn2.child1/obj33",
+  "class": "Generator",
+  "extensible": true,
+  "frozen": false,
+  "sealed": false,
+  "ownPropertyLength": 0,
+  "preview": {
+    "kind": "Object",
+    "ownProperties": {},
+    "ownSymbols": [],
+    "ownPropertiesLength": 0,
+    "ownSymbolsLength": 0,
+    "safeGetterValues": {}
+  }
+});
+
 module.exports = stubs;

packages/devtools-reps/src/reps/tests/grip.js

@@ -553,3 +553,22 @@ describe("Grip - Without preview", () => {
   });
 });
 
+describe("Grip - Generator object", () => {
+  // Test object:
+  // `function* genFunc() { var a = 5; while (a < 10) { yield a++; } }; genFunc();`
+  const object = stubs.get("Generator");
+
+  it("correctly selects Grip Rep", () => {
+    expect(getRep(object)).toBe(Grip.rep);
+  });
+
+  it("renders as expected", () => {
+    const renderRep = (props) => shallowRenderRep(object, props);
+    const defaultOutput = "Generator {  }";
+
+    expect(renderRep({ mode: undefined }).text()).toBe(defaultOutput);
+    expect(renderRep({ mode: MODE.TINY }).text()).toBe("Generator");
+    expect(renderRep({ mode: MODE.SHORT }).text()).toBe(defaultOutput);
+    expect(renderRep({ mode: MODE.LONG }).text()).toBe(defaultOutput);
+  });
+});