feat: Persist assert_integrity feature (#1032)

Fixes #1020

---------

Co-authored-by: Patrice Bender <[email protected]>

Author: daogrady

postgres/cds-plugin.js

@@ -25,11 +25,23 @@ cds.build?.register?.('postgres', class PostgresBuildPlugin extends cds.build.Pl
     if (fs.existsSync(path.join(this.task.src, 'package.json'))) {
       promises.push(this.copy(path.join(this.task.src, 'package.json')).to('package.json'))
     } else {
-      promises.push(
-        this.write({
-          dependencies: { '@sap/cds': '^8', '@cap-js/postgres': '^1' },
-          scripts: { start: 'cds-deploy' },
-        }).to('package.json'),
+      const packageJson = {
+        dependencies: {
+          '@sap/cds': '^8',
+          '@cap-js/postgres': '^1'
+        },
+        scripts: {
+          start: 'cds-deploy'
+        }
+      }
+      const assertIntegrity = cds.env?.features?.assert_integrity
+      if (assertIntegrity) {
+        packageJson.cds ??= {}
+        packageJson.cds.features ??= {}
+        packageJson.cds.features.assert_integrity = assertIntegrity
+      }
+      promises.push(        
+        this.write(packageJson).to('package.json')
       )
     }
     promises.push(this.write(cds.compile.to.json(model)).to(path.join('db', 'csn.json')))

postgres/test/cds-build.test.js

@@ -9,7 +9,8 @@ const cds = require('../../test/cds.js')
 
 const workDir = path.join(__dirname, 'tiny-sample')
 const genDir = path.join(workDir, 'gen')
-const dbDest = path.join(genDir, 'pg/db')
+const pgDest = path.join(genDir, 'pg')
+const dbDest = path.join(pgDest, 'db')
 
 // delete the generated folder after each test
 afterEach(() => {
@@ -27,4 +28,12 @@ describe('cds build plugin', () => {
     execSync('npx cds build --production', { cwd: workDir })
     expect(fs.existsSync(path.join(dbDest, 'csn.json'))).to.be.true
   })
+
+  test('should retain assert_integrity setting', () => {
+    execSync('npx cds build --production', { cwd: workDir })
+    const packageJson = require(path.join(pgDest, 'package.json'))
+    expect(packageJson.cds?.features?.assert_integrity).to.equal('db')
+    const ddl = String(execSync('npx cds deploy --dry', { cwd: workDir }))
+    expect(ddl).to.contain('REFERENCES')
+  })
 })

postgres/test/tiny-sample/db/schema.cds

@@ -4,4 +4,9 @@ entity Books {
   key ID : Integer;
   title  : String;
   stock  : Integer;
+  author : Association to Authors;
+}
+
+entity Authors {
+    key ID : Integer;
 }

postgres/test/tiny-sample/package.json

@@ -4,5 +4,10 @@
   "description": "A simple CAP project, to test the build plugin",
   "dependencies": {
     "@cap-js/postgres": "../../."
+  },
+  "cds": {
+    "features": {
+      "assert_integrity": "db"
+    }
   }
 }