SemanticOptional cleared

package.json

@@ -38,7 +38,7 @@
     "test": "npm run lint && npm run check && npm run testonly && npm run prettier:check && npm run check:spelling && npm run check:integrations",
     "lint": "eslint --cache --max-warnings 0 .",
     "check": "tsc --pretty",
-    "testonly": "mocha --full-trace src/**/__tests__/**/*-test.ts -g 'SemanticNonNull halts null propagation'",
+    "testonly": "mocha --full-trace src/**/__tests__/**/*-test.ts -g 'SemanticOptional allows null values'",
     "testonly:cover": "c8 npm run testonly",
     "prettier": "prettier --write --list-different .",
     "prettier:check": "prettier --check .",

src/execution/__tests__/executor-test.ts

@@ -1472,10 +1472,54 @@ describe('Execute: Handles Semantic Nullability', () => {
   });
 
   it('SemanticOptional allows null values', async () => {
+    const data = {
+      a: () => null,
+      b: () => null,
+      c: () => 'Cookie'
+    };
+
+    const document = parse(`
+      query {
+        a
+      }
+    `);
 
+    const result = await execute({
+      schema: new GraphQLSchema({ query: DataType }),
+      document,
+      rootValue: data,
+    });
+
+    expect(result).to.deep.equal({
+      data: {
+        a: null
+      }
+    });
   });
 
   it('SemanticOptional allows non-null values', async () => {
+    const data = {
+      a: () => 'Apple',
+      b: () => null,
+      c: () => 'Cookie'
+    };
+
+    const document = parse(`
+      query {
+        a
+      }
+    `);
 
+    const result = await execute({
+      schema: new GraphQLSchema({ query: DataType }),
+      document,
+      rootValue: data,
+    });
+
+    expect(result).to.deep.equal({
+      data: {
+        a: 'Apple'
+      }
+    });
   });
 });