feature: @putout/plugin-printer: remove-useless-tuples-from-type-checker: comparison

Author: coderaiser

packages/plugin-printer/lib/remove-useless-tuples-from-type-checker/fixture/comparison.js

@@ -0,0 +1,4 @@
+const isInsideArrayTupleOfThree = createTypeChecker([
+    '-: parentPath.parentPath -> !ArrayExpression',
+    ['+: parentPath.parentPath.node.elements.length', '=', 3],
+]);

packages/plugin-printer/lib/remove-useless-tuples-from-type-checker/index.js

@@ -40,11 +40,13 @@ export const traverse = ({push}) => ({
     },
 });
 
-const isTwoElementTuple = (a) => {
+const isCountElementsTuple = (count) => (a) => {
     if (!isArrayExpression(a))
         return false;
 
-    return a.node.elements.length === 2;
+    const {length} = a.node.elements;
+    
+    return length === count;
 };
 
 function isConsistent(elements) {
@@ -58,5 +60,8 @@ function isConsistent(elements) {
     if (elements.length === identifiersCount)
         return true;
 
-    return elements.filter(isTwoElementTuple).length;
+    if (elements.filter(isCountElementsTuple(3)).length)
+        return true;
+    
+    return elements.filter(isCountElementsTuple(2)).length;
 }

packages/plugin-printer/lib/remove-useless-tuples-from-type-checker/index.spec.js

@@ -21,3 +21,8 @@ test('printer: remove-useless-tuples-from-type-checker: transform: one-element-t
     t.transform('one-element-tuple');
     t.end();
 });
+
+test('printer: remove-useless-tuples-from-type-checker: no report: comparison', (t) => {
+    t.noReport('comparison');
+    t.end();
+});