fix(TestOperation): add specific tests for all operation types

Author: Frozen-byte

packages/apollo-angular/testing/tests/operation.spec.ts

@@ -16,6 +16,13 @@ const testSubscription = gql`
     }
   }
 `;
+const testMutation = gql`
+    mutation addHero($hero: String!) {
+        addHero(hero: $hero) {
+            name
+        }
+    }
+`;
 
 describe('TestOperation', () => {
   let mock: ApolloTestingBackend;
@@ -60,7 +67,7 @@ describe('TestOperation', () => {
     });
   });
 
-  test('should close the operation except for subscription', done => {
+  test('should leave the operation open for a subscription', done => {
     const operation = buildOperationForLink(testSubscription, {});
     const emittedResults: FetchResult[] = [];
 
@@ -84,6 +91,7 @@ describe('TestOperation', () => {
         done();
       },
     });
+    
 
     const testOperation = mock.expectOne(testSubscription);
 
@@ -94,6 +102,69 @@ describe('TestOperation', () => {
     testOperation.flushData({
       heroes: ['second Hero'],
     });
+    
     testOperation.complete();
   });
+
+  test('should close the operation after a query', done => {
+    const operation = buildOperationForLink(testQuery, {});
+    const emittedResults: FetchResult[] = [];
+
+    execute(link, operation).subscribe({
+      next(result) {
+        emittedResults.push(result);
+      },
+      complete() {
+        expect(emittedResults).toEqual([
+          {
+            data: {
+              heroes: ['first Hero'],
+            },
+          }
+        ]);
+        done();
+      },
+    });
+
+    const testOperation = mock.expectOne(testQuery);
+
+    testOperation.flushData({
+      heroes: ['first Hero'],
+    });
+
+    testOperation.flushData({
+      heroes: ['second Hero'],
+    });
+  });
+
+  test('should close the operation after a mutation', done => {
+    const operation = buildOperationForLink(testMutation, {hero: 'firstHero'});
+    const emittedResults: FetchResult[] = [];
+
+    execute(link, operation).subscribe({
+      next(result) {
+        emittedResults.push(result);
+      },
+      complete() {
+        expect(emittedResults).toEqual([
+          {
+            data: {
+              heroes: ['first Hero'],
+            },
+          },
+        ]);
+        done();
+      },
+    });
+
+    const testOperation = mock.expectOne(testMutation);
+
+    testOperation.flushData({
+      heroes: ['first Hero'],
+    });
+
+    testOperation.flushData({
+      heroes: ['second Hero'],
+    });
+  });
 });