From 7332ca17a89c4ffcb48c69c48547a7f096ca1a7a Mon Sep 17 00:00:00 2001
From: MeAkib <akibh805@gmail.com>
Date: Thu, 22 Oct 2026 23:12:18 +0600
Subject: [PATCH 1/2] test(@angular/build): add spec for the unit-test
 `coverageWatermarks` option

The `coverageWatermarks` option had no test. Run coverage with the HTML reporter using watermarks
that classify any result as high (`[0, 0]`) or low (`[101, 101]`) and check the report's status class.
---
 .../options/code-coverage-watermarks_spec.ts  | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 packages/angular/build/src/builders/unit-test/tests/options/code-coverage-watermarks_spec.ts

diff --git a/packages/angular/build/src/builders/unit-test/tests/options/code-coverage-watermarks_spec.ts b/packages/angular/build/src/builders/unit-test/tests/options/code-coverage-watermarks_spec.ts
new file mode 100644
index 000000000000..eec73a88201b
--- /dev/null
+++ b/packages/angular/build/src/builders/unit-test/tests/options/code-coverage-watermarks_spec.ts
@@ -0,0 +1,47 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.dev/license
+ */
+
+import { execute } from '../../index';
+import {
+  BASE_OPTIONS,
+  describeBuilder,
+  UNIT_TEST_BUILDER_INFO,
+  setupApplicationTarget,
+} from '../setup';
+
+describeBuilder(execute, UNIT_TEST_BUILDER_INFO, (harness) => {
+  describe('Option: "coverageWatermarks"', () => {
+    beforeEach(async () => {
+      setupApplicationTarget(harness);
+    });
+
+    // Any coverage percentage is at or above a 0% high watermark and below a 101% low watermark.
+    for (const [watermark, level] of [
+      [[0, 0], 'high'],
+      [[101, 101], 'low'],
+    ] as const) {
+      it(`should mark coverage as "${level}" in the HTML report with ${watermark} watermarks`, async () => {
+        harness.useTarget('test', {
+          ...BASE_OPTIONS,
+          coverage: true,
+          coverageReporters: ['html'] as any,
+          coverageWatermarks: {
+            statements: [...watermark],
+            branches: [...watermark],
+            functions: [...watermark],
+            lines: [...watermark],
+          },
+        });
+
+        const { result } = await harness.executeOnce();
+        expect(result?.success).toBeTrue();
+        harness.expectFile('coverage/test/index.html').content.toContain(`status-line ${level}`);
+      });
+    }
+  });
+});

From 9fa0f27e0ed77606ddd47e556bbe81fc24703c8b Mon Sep 17 00:00:00 2001
From: Shuaib Hasan Akib <48770016+MeAkib@users.noreply.github.com>
Date: Thu, 22 Oct 2026 23:24:48 +0600
Subject: [PATCH 2/2] fixup! test(@angular/build): add spec for the unit-test
 `coverageWatermarks` option

---
 .../unit-test/tests/options/code-coverage-watermarks_spec.ts   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/angular/build/src/builders/unit-test/tests/options/code-coverage-watermarks_spec.ts b/packages/angular/build/src/builders/unit-test/tests/options/code-coverage-watermarks_spec.ts
index eec73a88201b..8e29470e86b0 100644
--- a/packages/angular/build/src/builders/unit-test/tests/options/code-coverage-watermarks_spec.ts
+++ b/packages/angular/build/src/builders/unit-test/tests/options/code-coverage-watermarks_spec.ts
@@ -7,6 +7,7 @@
  */
 
 import { execute } from '../../index';
+import { CoverageReporterEnum } from '../../schema';
 import {
   BASE_OPTIONS,
   describeBuilder,
@@ -29,7 +30,7 @@ describeBuilder(execute, UNIT_TEST_BUILDER_INFO, (harness) => {
         harness.useTarget('test', {
           ...BASE_OPTIONS,
           coverage: true,
-          coverageReporters: ['html'] as any,
+          coverageReporters: [CoverageReporterEnum.Html],
           coverageWatermarks: {
             statements: [...watermark],
             branches: [...watermark],