assert: improve diff output

The output is now a tiny bit improved by sorting object properties when inspecting the values that are compared with each other. That reduces the overall diff for identical objects with a different property insertion order. Backport-PR-URL: #23226 PR-URL: #22788 Refs: #22763 Reviewed-By: John-David Dalton <john.david.dalton@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
nodejs · Oct 7, 2018 · efdb326 · efdb326
1 parent cf17759
commit efdb326
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Showing 3 changed files with 29 additions and 15 deletions.
diff --git a/lib/internal/assert.js b/lib/internal/assert.js
@@ -43,7 +43,8 @@ function inspectValue(val) {
       // comparison.
       breakLength: Infinity,
       // Assert does not detect proxies currently.
-      showProxy: false
+      showProxy: false,
+      sorted: true
     }
   ).split('\n');
 }

diff --git a/test/parallel/test-assert.js b/test/parallel/test-assert.js
@@ -285,7 +285,7 @@ testAssertionMessage(/abc/gim, '/abc/gim');
 testAssertionMessage(function f() {}, '[Function: f]');
 testAssertionMessage(function() {}, '[Function]');
 testAssertionMessage({}, '{}');
-testAssertionMessage(circular, '{\n-   y: 1,\n-   x: [Circular]\n- }');
+testAssertionMessage(circular, '{\n-   x: [Circular],\n-   y: 1\n- }');
 testAssertionMessage({ a: undefined, b: null },
                      '{\n-   a: undefined,\n-   b: null\n- }');
 testAssertionMessage({ a: NaN, b: Infinity, c: -Infinity },
@@ -593,8 +593,8 @@ assert.throws(
     '\n' +
     '- {}\n' +
     '+ {\n' +
-    "+   loop: 'forever',\n" +
-    '+   [Symbol(nodejs.util.inspect.custom)]: [Function]\n' +
+    '+   [Symbol(nodejs.util.inspect.custom)]: [Function],\n' +
+    "+   loop: 'forever'\n" +
     '+ }'
   });
 
@@ -858,9 +858,12 @@ common.expectsError(
       code: 'ERR_ASSERTION',
       name: 'AssertionError [ERR_ASSERTION]',
       message: `${start}\n${actExp}\n\n` +
-               "  Comparison {\n    name: 'TypeError',\n" +
-               "    message: 'Wrong value',\n-   code: 404\n" +
-               '+   code: 404,\n+   foo: undefined\n  }'
+               '  Comparison {\n' +
+               '    code: 404,\n' +
+               '+   foo: undefined,\n' +
+               "    message: 'Wrong value',\n" +
+               "    name: 'TypeError'\n" +
+               '  }'
     }
   );
 
@@ -872,9 +875,13 @@ common.expectsError(
       code: 'ERR_ASSERTION',
       name: 'AssertionError [ERR_ASSERTION]',
       message: `${start}\n${actExp}\n\n` +
-               "  Comparison {\n    name: 'TypeError',\n" +
-               "    message: 'Wrong value',\n-   code: 404\n" +
-               "+   code: '404',\n+   foo: undefined\n  }"
+               '  Comparison {\n' +
+               '-   code: 404,\n' +
+               "+   code: '404',\n" +
+               '+   foo: undefined,\n' +
+               "    message: 'Wrong value',\n" +
+               "    name: 'TypeError'\n" +
+               '  }'
     }
   );
 
@@ -904,8 +911,11 @@ common.expectsError(
       name: 'AssertionError [ERR_ASSERTION]',
       code: 'ERR_ASSERTION',
       message: `${start}\n${actExp}\n\n` +
-               "  Comparison {\n-   name: 'TypeError',\n+   name: 'Error'," +
-               "\n    message: 'e'\n  }"
+               '  Comparison {\n' +
+               "    message: 'e',\n" +
+               "-   name: 'TypeError'\n" +
+               "+   name: 'Error'\n" +
+               '  }'
     }
   );
   assert.throws(
@@ -915,8 +925,11 @@ common.expectsError(
       code: 'ERR_ASSERTION',
       generatedMessage: true,
       message: `${start}\n${actExp}\n\n` +
-               "  Comparison {\n    name: 'Error',\n-   message: 'foo'" +
-               "\n+   message: ''\n  }"
+               '  Comparison {\n' +
+               "-   message: 'foo',\n" +
+               "+   message: '',\n" +
+               "    name: 'Error'\n" +
+               '  }'
     }
   );
 

diff --git a/test/parallel/test-internal-errors.js b/test/parallel/test-internal-errors.js
@@ -92,7 +92,7 @@ common.expectsError(() => {
 }, {
   code: 'ERR_ASSERTION',
   type: assert.AssertionError,
-  message: /-   message: 'Error for testing purposes: a'\n\+   message: \/\^Error/
+  message: /-   message: 'Error for testing purposes: a',\n\+   message: \/\^Error/
 });
 
 // Test ERR_INVALID_FD_TYPE