Add HamlLint::Linter::NoPlainNodes linterhaml-lint-no-plain-nodes

Add a simple haml_lint linter to report all plain nodes.
"Plain nodes" in HAML are scritpless plaintext leaf nodes.

Add haml-lint_todo to onboard new haml linters.
Excludes existing NoPlainNodes lints.

1 files changed, 55 insertions, 0 deletions

diff --git a/spec/lib/haml_lint/linter/no_plain_nodes_spec.rb b/spec/lib/haml_lint/linter/no_plain_nodes_spec.rb
new file mode 100644
index 00000000000..99cc9b9bc8d
--- /dev/null
+++ b/spec/lib/haml_lint/linter/no_plain_nodes_spec.rb
@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require 'haml_lint'
+require 'haml_lint/spec'
+
+describe HamlLint::Linter::NoPlainNodes do
+  include_context 'linter'
+
+  context 'reports when a tag has an inline plain node' do
+    let(:haml) { '%tag Hello Tanuki' }
+    let(:message) { "`Hello Tanuki` is a plain node. Please use an i18n method like `= _('Hello Tanuki')`" }
+
+    it { is_expected.to report_lint message: message }
+  end
+
+  context 'reports when a tag has multiline plain nodes' do
+    let(:haml) { <<-HAML }
+      %tag
+        Hello
+        Tanuki
+    HAML
+
+    it { is_expected.to report_lint count: 1 }
+  end
+
+  context 'reports when a tag has an inline plain node with interpolation' do
+    let(:haml) { '%tag Hello #{"Tanuki"}!' } # rubocop:disable Lint/InterpolationCheck
+
+    it { is_expected.to report_lint }
+  end
+
+  context 'does not report when a tag has an inline script' do
+    let(:haml) { '%tag= "Hello Tanuki"' }
+
+    it { is_expected.not_to report_lint }
+  end
+
+  context 'does not report when a tag is empty' do
+    let(:haml) { '%tag' }
+
+    it { is_expected.not_to report_lint }
+  end
+
+  context 'reports multiple when a tag has multiline plain nodes split by non-text nodes' do
+    let(:haml) { <<-HAML }
+      %tag
+        Hello
+        .split-node There
+        Tanuki
+    HAML
+
+    it { is_expected.to report_lint count: 3 }
+  end
+end