From 6f904f0d3cbdd878d8151f69b606253f3be9ae98 Mon Sep 17 00:00:00 2001
From: Will Douglas <willygdouglas@gmail.com>
Date: Mon, 11 Nov 2019 16:29:53 -0700
Subject: [PATCH] New: Support output option for rule-tester tests of
 suggestions

---
 lib/rule-tester/rule-tester.js       | 7 +++++++
 tests/lib/rules/no-useless-escape.js | 8 ++++----
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/lib/rule-tester/rule-tester.js b/lib/rule-tester/rule-tester.js
index 97064466f85..bbb62d78884 100644
--- a/lib/rule-tester/rule-tester.js
+++ b/lib/rule-tester/rule-tester.js
@@ -612,6 +612,13 @@ class RuleTester {
                                 assertSuggestionKeyEquals("desc");
                                 assertSuggestionKeyEquals("messageId");
                                 assertSuggestionKeyEquals("fix");
+
+                                if (hasOwnProperty(expectedSuggestion, "output")) {
+                                    const fix = actualSuggestion.fix;
+                                    const codeWithAppliedSuggestion = item.code.slice(0, fix.range[0]) + fix.text + item.code.slice(fix.range[1]);
+
+                                    assert.strictEqual(codeWithAppliedSuggestion, expectedSuggestion.output, "Expected the applied suggestion fix to match the test suggestion output");
+                                }
                             });
                         }
                     } else {
diff --git a/tests/lib/rules/no-useless-escape.js b/tests/lib/rules/no-useless-escape.js
index 4b8bd11c78d..0bd34b6b70b 100644
--- a/tests/lib/rules/no-useless-escape.js
+++ b/tests/lib/rules/no-useless-escape.js
@@ -154,10 +154,10 @@ ruleTester.run("no-useless-escape", rule, {
                 type: "Literal",
                 suggestions: [{
                     messageId: "removeEscape",
-                    fix: { range: [11, 12], text: "" }
+                    output: "var foo = /;/;"
                 }, {
                     messageId: "escapeBackslash",
-                    fix: { range: [11, 11], text: "\\" }
+                    output: "var foo = /\\\\;/;"
                 }]
             }]
         },
@@ -171,10 +171,10 @@ ruleTester.run("no-useless-escape", rule, {
                 type: "Literal",
                 suggestions: [{
                     messageId: "removeEscape",
-                    fix: { range: [11, 12], text: "" }
+                    output: "var foo = \"'\";"
                 }, {
                     messageId: "escapeBackslash",
-                    fix: { range: [11, 11], text: "\\" }
+                    output: "var foo = \"\\\\'\";"
                 }]
             }]
         },