fix(schematics): rewrite projectFromRc and add spec file

src/schematics/utils.jasmine.ts

@@ -0,0 +1,69 @@
+import { projectFromRc } from './utils';
+
+describe('projectFromRc()', () => {
+  it('Given `projects.default`, should return default project', () => {
+    const FIRE_BASE_RC = `{
+      "targets": {
+        "project_prod": {
+          "hosting": {
+            "app_1": [
+              "target_1_prod"
+            ],
+            "app_2": [
+              "target_2_prod"
+            ]
+          }
+        },
+        "project_stg": {
+          "hosting": {
+            "app_1": [
+              "target_1_stg"
+            ],
+            "app_2": [
+              "target_2_stg"
+            ]
+          }
+        }
+      },
+      "projects": {
+        "default": "project_stg"
+      }
+    }`;
+    expect(projectFromRc(JSON.parse(FIRE_BASE_RC), 'app_1')).toEqual(['project_stg', 'target_1_stg']);
+  });
+
+  it('Given no `projects.default`, should return first matched project', () => {
+    const FIRE_BASE_RC = `{
+      "targets": {
+        "project_prod": {
+          "hosting": {
+            "app_1": [
+              "target_1_prod"
+            ],
+            "app_2": [
+              "target_2_prod"
+            ]
+          }
+        },
+        "project_stg": {
+          "hosting": {
+            "app_1": [
+              "target_1_stg"
+            ],
+            "app_2": [
+              "target_2_stg"
+            ]
+          }
+        }
+      }
+    }`;
+    expect(projectFromRc(JSON.parse(FIRE_BASE_RC), 'app_1')).toEqual(['project_prod', 'target_1_prod']);
+  });
+
+  it('Given empty targets, return [undefined, undefined]', () => {
+    const FIRE_BASE_RC = `{
+      "targets": {}
+    }`;
+    expect(projectFromRc(JSON.parse(FIRE_BASE_RC), 'app_1')).toEqual([undefined, undefined]);
+  });
+});

src/schematics/utils.ts

@@ -95,13 +95,17 @@ export function getFirebaseProjectNameFromFs(
   }
 }
 
-const projectFromRc = (rc: FirebaseRc, target: string): [string|undefined, string|undefined] => {
-  const defaultProject = rc.projects?.default;
-  const project = Object.keys(rc.targets || {}).find(
-    project => !!rc.targets?.[project]?.hosting?.[target]
-  );
-  const site = project && rc.targets?.[project]?.hosting?.[target]?.[0];
-  return [project || defaultProject, site];
+export const projectFromRc = (rc: FirebaseRc, target: string): [string|undefined, string|undefined] => {
+  if (!rc.targets) {
+    return [undefined, undefined];
+  }
+
+  const project = rc.projects?.default || Object.keys(rc.targets)[0];
+  if (!project) {
+    return [undefined, undefined];
+  }
+
+  return [project, rc.targets[project].hosting[target][0]];
 };
 
 /**