[resistor-color] Add a test generator template.

exercises/practice/resistor-color/.meta/template.j2

@@ -0,0 +1,17 @@
+{% macro assertion(case) -%}
+{%- if case["property"] == "colors" -%}
+expect({{ exercise_name | remove_spaces }}.colors()).toEqual {{ case["expected"] | format_multiline_list }}
+{%- else -%}
+expect({{ exercise_name | remove_spaces }}.colorCode {{ case["input"]["color"] | quote }}).toEqual {{ case["expected"] | quote }}
+{%- endif -%}
+{%- endmacro %}
+{{ header }}
+
+{{ exercise_name | remove_spaces }} = require './{{ exercise_slug }}'
+
+describe {{ exercise_name | quote }}, ->
+{% for case in cases %}
+  {{ case["test_keyword"] }} {{ case["description"] | quote }}, ->
+{{ assertion(case) | indent(4, true) }}
+
+{% endfor %}

exercises/practice/resistor-color/resistor-color.spec.coffee

@@ -1,33 +1,29 @@
+# These tests are auto-generated with test data from:
+# https://github.com/exercism/problem-specifications/blob/main/exercises/resistor-color/canonical-data.json
+# File last updated on 2026-11-05T15:54:19+00:00
+
 ResistorColor = require './resistor-color'
 
-describe 'ResistorColor', ->
-  it 'Black', ->
-    results = ResistorColor.colorCode('black')
-    expected = 0
-    expect(results).toEqual expected
+describe "Resistor Color", ->
+  it "Black", ->
+    expect(ResistorColor.colorCode "black").toEqual 0
 
-  xit 'White', ->
-    results = ResistorColor.colorCode('white')
-    expected = 9
-    expect(results).toEqual expected
+  xit "White", ->
+    expect(ResistorColor.colorCode "white").toEqual 9
 
-  xit 'Orange', ->
-    results = ResistorColor.colorCode('orange')
-    expected = 3
-    expect(results).toEqual expected
+  xit "Orange", ->
+    expect(ResistorColor.colorCode "orange").toEqual 3
 
-  xit 'Colors', ->
-    results = ResistorColor.colors()
-    expected = [
-      'black'
-      'brown'
-      'red'
-      'orange'
-      'yellow'
-      'green'
-      'blue'
-      'violet'
-      'grey'
-      'white'
+  xit "Colors", ->
+    expect(ResistorColor.colors()).toEqual [
+      "black"
+      "brown"
+      "red"
+      "orange"
+      "yellow"
+      "green"
+      "blue"
+      "violet"
+      "grey"
+      "white"
     ]
-    expect(results).toEqual expected