Types src/content

test/shared/operations.test.ts

@@ -0,0 +1,41 @@
+import * as operations from 'shared/operations';
+
+describe('operations', () => {
+  describe('#valueOf', () => {
+    it('returns an Operation', () => {
+      let op: operations.Operation = operations.valueOf({
+        type: operations.SCROLL_VERTICALLY,
+        count: 10,
+      });
+      expect(op.type).to.equal(operations.SCROLL_VERTICALLY);
+      expect(op.count).to.equal(10);
+    });
+
+    it('throws an Error on missing required parameter', () => {
+      expect(() => operations.valueOf({
+        type: operations.SCROLL_VERTICALLY,
+      })).to.throw(TypeError);
+    });
+
+    it('fills default valus of optional parameter', () => {
+      let op: operations.Operation = operations.valueOf({
+        type: operations.COMMAND_SHOW_OPEN,
+      });
+
+      expect(op.type).to.equal(operations.COMMAND_SHOW_OPEN)
+      expect(op.alter).to.be.false;
+    });
+
+    it('throws an Error on mismatch of parameter', () => {
+      expect(() => operations.valueOf({
+        type: operations.SCROLL_VERTICALLY,
+        count: '10',
+      })).to.throw(TypeError);
+
+      expect(() => valueOf({
+        type: operations.COMMAND_SHOW_OPEN,
+        alter: 'true',
+      })).to.throw(TypeError);
+    });
+  });
+})