fix test on secondary requirements (act-rules#2102)

* fix test on secondary requirements

* More assertions

* Update _rules/aria-required-id-references-in6db8.md

Co-authored-by: Jean-Yves Moyen <jym@siteimprove.com>

---------

Co-authored-by: Jean-Yves Moyen <jym@siteimprove.com>

Author: WilcoFiers

__tests__/frontmatter.js

@@ -95,17 +95,17 @@ function validateRuleFrontmatter({ frontmatter }, metaData) {
 		 */
 		const accRequirementValues = Object.values(accessibility_requirements)
 		test.each(accRequirementValues)('has expected keys for accessibility requirement: `%p`', accReq => {
-			if (!accReq) {
-				return
-			} else if (accReq.secondary) {
-				// Note; empty strings & false won't get here, and so aren't allowed
-				expect(['string', 'boolean']).toContain(typeof accReq.secondary)
-				return
-			}
-
+			expect(accReq).not.toBeNull()
+			expect(typeof accReq).toBe('object')
 			const keys = Object.keys(accReq).sort()
-			expect(keys.length).toBeGreaterThanOrEqual(4)
-			expect(keys).toIncludeAllMembers(['failed', 'forConformance', 'inapplicable', 'passed'])
+
+			if (keys.includes('secondary')) {
+				expect(keys.length).toBe(1)
+				expect(typeof accReq.secondary).toBe('string')
+			} else {
+				expect(keys.length).toBeGreaterThanOrEqual(4)
+				expect(keys).toIncludeAllMembers(['failed', 'forConformance', 'inapplicable', 'passed'])
+			}
 		})
 	}
 }

_rules/aria-required-id-references-in6db8.md

@@ -12,9 +12,9 @@ accessibility_requirements:
     passed: satisfied
     inapplicable: satisfied
   wcag20:1.3.1: # Info and Relationships (A)
-    secondary: true
+    secondary: This success criterion is **less strict** than this rule. This is because the rule does not check for alternatives which may be accessible. Some of the failed examples satisfy this success criterion.
   wcag20:4.1.2: # Name, Role, Value (A)
-    secondary: true
+    secondary: This success criterion is **less strict** than this rule. This is because the rule does not check for alternatives which may be accessible. Some of the failed examples satisfy this success criterion.
 input_aspects:
   - DOM Tree
   - CSS Styling
@@ -32,7 +32,7 @@ This rule applies to any `aria-controls` attribute defined on an [HTML element][
 
 ## Expectation
 
-Each test target's [attribute value][] is a space-separated list of one or more IDs. At least one of those IDs must match an `id` [attribute value][] in the same [shadow tree][] or, if not within a [shadow tree][], within the same [document][document tree] 
+Each test target's [attribute value][] is a space-separated list of one or more IDs. At least one of those IDs must match an `id` [attribute value][] in the same [shadow tree][] or, if not within a [shadow tree][], within the same [document][document tree].
 
 ## Assumptions
 

_rules/text-contrast-afw4f7.md

@@ -11,7 +11,7 @@ accessibility_requirements:
     passed: further testing needed
     inapplicable: further testing needed
   wcag20:1.4.6: # Contrast (Enhanced) (AAA)
-secondary: This success criterion is **more strict** than this rule. This is because this criterion has a higher minimum contrast. Some of the passed examples do not satisfy this success criterion.
+    secondary: This success criterion is **more strict** than this rule. This is because this criterion has a higher minimum contrast. Some of the passed examples do not satisfy this success criterion.
 input_aspects:
   - Accessibility Tree
   - DOM Tree