From 07a22a929e51a1be6de3b5c9c8568397624e2acb Mon Sep 17 00:00:00 2001
From: Tommy Carter <tommyjr@gmail.com>
Date: Fri, 3 Apr 2026 13:04:33 -0500
Subject: [PATCH 1/4] Test cases for no-unused-block-params

---
 .../lib/rules/template-no-unused-block-params.js  | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/tests/lib/rules/template-no-unused-block-params.js b/tests/lib/rules/template-no-unused-block-params.js
index b2063b8a81..6713eeb10e 100644
--- a/tests/lib/rules/template-no-unused-block-params.js
+++ b/tests/lib/rules/template-no-unused-block-params.js
@@ -11,6 +11,21 @@ const validHbs = [
   '{{#each cats as |cat|}}{{meow cat}}{{/each}}',
   '{{#each cats as |cat index|}}{{index}}{{/each}}',
   '{{#each cats as |cat index|}}{{#each cat.lives as |life|}}{{index}}: {{life}}{{/each}}{{/each}}',
+  `
+  {{#each cats as |cat|}}
+    <div data-cat-name={{cat.name}}></div>
+  {{/each}}
+  `,
+  `
+  {{#each cats as |cat|}}
+    <div class="cat {{cat.name}}"></div>
+  {{/each}}
+  `,
+  `
+  {{#each cats as |cat|}}
+    <div class="cat {{if (isFavorite cat.name favoriteCatNames) 'favorite'}}"></div>
+  {{/each}}
+  `,
   `
     <MyComponent @model={{this.model}} as |param|>
       {{! template-lint-disable }}

From 4ec102b6954ed49300d46ce3b9ff310199d571bb Mon Sep 17 00:00:00 2001
From: Tommy Carter <tommyjr@gmail.com>
Date: Fri, 3 Apr 2026 14:18:55 -0500
Subject: [PATCH 2/4] Additional test case for no-unused-block-params

---
 tests/lib/rules/template-no-unused-block-params.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/lib/rules/template-no-unused-block-params.js b/tests/lib/rules/template-no-unused-block-params.js
index 6713eeb10e..c0d76d05db 100644
--- a/tests/lib/rules/template-no-unused-block-params.js
+++ b/tests/lib/rules/template-no-unused-block-params.js
@@ -113,6 +113,11 @@ const invalidHbs = [
     output: null,
     errors: [{ messageId: 'unusedBlockParam', data: { param: 'life' } }],
   },
+  {
+    code: `{{#each cats as |cat|}}plain cat text{{/each}}`,
+    output: null,
+    errors: [{ messageId: 'unusedBlockParam', data: { param: 'cat' } }],
+  },
 ];
 
 function wrapTemplate(entry) {

From caf46da3e4f9fa15286acc0942c9733064c8bdcf Mon Sep 17 00:00:00 2001
From: Tommy Carter <tommyjr@gmail.com>
Date: Fri, 3 Apr 2026 14:33:31 -0500
Subject: [PATCH 3/4] Fix collectChildNodes to include parts during node
 traversal

---
 lib/rules/template-no-unused-block-params.js       | 5 +++++
 tests/lib/rules/template-no-unused-block-params.js | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/lib/rules/template-no-unused-block-params.js b/lib/rules/template-no-unused-block-params.js
index 2525f342ff..a0e043d0d6 100644
--- a/lib/rules/template-no-unused-block-params.js
+++ b/lib/rules/template-no-unused-block-params.js
@@ -24,6 +24,11 @@ function collectChildNodes(n) {
   if (n.children) {
     children.push(...n.children);
   }
+  // GlimmerPathExpression also has 'parts', so make sure we're not treating
+  // concat'd path string parts as AST nodes.
+  if (n.type === 'GlimmerConcatStatement' && n.parts) {
+    children.push(...n.parts);
+  }
   return children;
 }
 
diff --git a/tests/lib/rules/template-no-unused-block-params.js b/tests/lib/rules/template-no-unused-block-params.js
index c0d76d05db..c546100d31 100644
--- a/tests/lib/rules/template-no-unused-block-params.js
+++ b/tests/lib/rules/template-no-unused-block-params.js
@@ -118,6 +118,11 @@ const invalidHbs = [
     output: null,
     errors: [{ messageId: 'unusedBlockParam', data: { param: 'cat' } }],
   },
+  {
+    code: `{{#each cats as |cat|}}{{a.different.cat}}{{/each}}`,
+    output: null,
+    errors: [{ messageId: 'unusedBlockParam', data: { param: 'cat' } }],
+  },
 ];
 
 function wrapTemplate(entry) {

From 05ae98fee51421ff4d92f4e92e84938306b5fe96 Mon Sep 17 00:00:00 2001
From: Tommy Carter <tommyjr@gmail.com>
Date: Fri, 3 Apr 2026 15:10:40 -0500
Subject: [PATCH 4/4] Change quotes to pass lint

---
 tests/lib/rules/template-no-unused-block-params.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/lib/rules/template-no-unused-block-params.js b/tests/lib/rules/template-no-unused-block-params.js
index c546100d31..84ac8840e6 100644
--- a/tests/lib/rules/template-no-unused-block-params.js
+++ b/tests/lib/rules/template-no-unused-block-params.js
@@ -114,12 +114,12 @@ const invalidHbs = [
     errors: [{ messageId: 'unusedBlockParam', data: { param: 'life' } }],
   },
   {
-    code: `{{#each cats as |cat|}}plain cat text{{/each}}`,
+    code: '{{#each cats as |cat|}}plain cat text{{/each}}',
     output: null,
     errors: [{ messageId: 'unusedBlockParam', data: { param: 'cat' } }],
   },
   {
-    code: `{{#each cats as |cat|}}{{a.different.cat}}{{/each}}`,
+    code: '{{#each cats as |cat|}}{{a.different.cat}}{{/each}}',
     output: null,
     errors: [{ messageId: 'unusedBlockParam', data: { param: 'cat' } }],
   },