Linter: Fix actionview-no-silent-helper inside blocks

javascript/packages/linter/src/rules/actionview-no-silent-helper.ts

@@ -4,7 +4,7 @@ import { isERBOutputNode, PrismVisitor } from "@herb-tools/core"
 import { isActionViewHelperCall } from "./action-view-utils.js"
 
 import type { UnboundLintOffense, LintContext, FullRuleConfig } from "../types.js"
-import type { ParseResult, ERBNode, ParserOptions, PrismNode } from "@herb-tools/core"
+import type { ParseResult, ERBContentNode, ParserOptions, PrismNode } from "@herb-tools/core"
 
 class ActionViewHelperCallCollector extends PrismVisitor {
   public readonly matches: { helperName: string }[] = []
@@ -21,19 +21,19 @@ class ActionViewHelperCallCollector extends PrismVisitor {
 }
 
 class ActionViewNoSilentHelperVisitor extends BaseRuleVisitor {
-  visitERBNode(node: ERBNode): void {
+  visitERBContentNode(node: ERBContentNode): void {
     this.checkSilentHelper(node)
-    super.visitERBNode(node)
+    super.visitERBContentNode(node)
   }
 
-  private checkSilentHelper(node: ERBNode): void {
+  private checkSilentHelper(node: ERBContentNode): void {
     if (isERBOutputNode(node)) return
 
     const tagOpening = node.tag_opening?.value
     if (!tagOpening) return
     if (tagOpening.startsWith("<%%")) return
 
-    const prismNode = (node as any).prismNode
+    const prismNode = node.prismNode
     if (!prismNode) return
 
     const collector = new ActionViewHelperCallCollector()

javascript/packages/linter/test/rules/actionview-no-silent-helper.test.ts

@@ -116,6 +116,16 @@ describe("ActionViewNoSilentHelperRule", () => {
     `)
   })
 
+  test("silent tag with tag.div inside conditional is not allowed", () => {
+    expectError("Avoid using `<% %>` with `tag`. Use `<%= %>` to ensure the helper's output is rendered.")
+
+    assertOffenses(dedent`
+      <% if true %>
+        <% tag.div "Hello" %>
+      <% end %>
+    `)
+  })
+
   test("silent tag with postfix conditional is not allowed", () => {
     expectError("Avoid using `<% %>` with `link_to`. Use `<%= %>` to ensure the helper's output is rendered.")
 
@@ -129,4 +139,79 @@ describe("ActionViewNoSilentHelperRule", () => {
       <%= link_to "Home", root_path if show_link %>
     `)
   })
+
+  test("output tag with link_to inside conditional is allowed", () => {
+    expectNoOffenses(dedent`
+      <% if true %>
+        <%= link_to "Foo", foo_path %>
+      <% end %>
+    `)
+  })
+
+  test("output tag with link_to inside loop is allowed", () => {
+    expectNoOffenses(dedent`
+      <% ["Home", "About"].each do |label| %>
+        <%= link_to label, root_path %>
+      <% end %>
+    `)
+  })
+
+  test("output tag with hidden_field_tag inside each loop is allowed", () => {
+    expectNoOffenses(dedent`
+      <% data.each do |key, value| %>
+        <%= hidden_field_tag "form[#{key}]" %>
+      <% end %>
+    `)
+  })
+
+  test("output tag with helpers inside content_for block is allowed", () => {
+    expectNoOffenses(dedent`
+      <% content_for :mobile_header do %>
+        <%= link_to :back, { class: "size-12 block mt-6" } do %>
+          <%= image_tag "icons/back.svg", alt: "Back icon", class: "size-6" %>
+        <% end %>
+        <h1 class="block font-bold text-lg">
+          Editing a <%= model.class.name %>
+        </h1>
+        <span class="block size-12">&nbsp;</span>
+      <% end %>
+    `)
+  })
+
+  test("output tag with helpers inside nested each loop with conditional is allowed", () => {
+    expectNoOffenses(dedent`
+      <tbody>
+        <% projects.each do |project| %>
+          <tr>
+            <td><a href="<%= project.github_url %>"><%= project.label %></a></td>
+
+            <td>
+              <a href="<%= project.version_badge_url %>">
+                <%= image_tag project.version_badge_image_url, alt: "#{project.label} on rubygems" %>
+              </a>
+            </td>
+
+            <td>
+              <% if project.ci? %>
+                <a href="<%= project.ci_badge_url %>">
+                  <%= image_tag project.ci_badge_image_url, alt: "#{project.label} CI status" %>
+                </a>
+              <% end %>
+            </td>
+          </tr>
+        <% end %>
+      </tbody>
+    `)
+  })
+
+  test("output tag with helpers inside nested conditional with block is allowed", () => {
+    expectNoOffenses(dedent`
+      <% if @topic.talks_count.to_i > 8 %>
+        <%= link_to talks_gem_path(gem_name: @gem.gem_name), class: "link text-primary flex items-center gap-1" do %>
+          View all <%= @topic.talks_count %> talks
+          <%= fa("arrow-right", size: :xs) %>
+        <% end %>
+      <% end %>
+    `)
+  })
 })