nodejs
diff --git a/Collapse file
‎lib/internal/test_runner/tap_stream.js‎
Copy file name to clipboardExpand all lines: lib/internal/test_runner/tap_stream.js
+25Lines changed: 25 additions & 0 deletions b/Collapse file
‎lib/internal/test_runner/tap_stream.js‎
Copy file name to clipboardExpand all lines: lib/internal/test_runner/tap_stream.js
+25Lines changed: 25 additions & 0 deletions
diff --git a/Collapse file
‎test/message/test_runner_describe_it.out‎
Copy file name to clipboardExpand all lines: test/message/test_runner_describe_it.out
+3Lines changed: 3 additions & 0 deletions b/Collapse file
‎test/message/test_runner_describe_it.out‎
Copy file name to clipboardExpand all lines: test/message/test_runner_describe_it.out
+3Lines changed: 3 additions & 0 deletions
diff --git a/Collapse file
‎test/message/test_runner_output.out‎
Copy file name to clipboardExpand all lines: test/message/test_runner_output.out
+3Lines changed: 3 additions & 0 deletions b/Collapse file
‎test/message/test_runner_output.out‎
Copy file name to clipboardExpand all lines: test/message/test_runner_output.out
+3Lines changed: 3 additions & 0 deletions
@@ -179,17 +179,30 @@ function jsToYaml(indent, name, value) {
       code,
       failureType,
       message,
+      expected,
+      actual,
+      operator,
       stack,
     } = value;
     let errMsg = message ?? '<unknown error>';
     let errStack = stack;
     let errCode = code;
+    let errExpected = expected;
+    let errActual = actual;
+    let errOperator = operator;
+    let errIsAssertion = isAssertionLike(value);
 
     // If the ERR_TEST_FAILURE came from an error provided by user code,
     // then try to unwrap the original error message and stack.
     if (code === 'ERR_TEST_FAILURE' && kUnwrapErrors.has(failureType)) {
       errStack = cause?.stack ?? errStack;
       errCode = cause?.code ?? errCode;
+      if (isAssertionLike(cause)) {
+        errExpected = cause.expected;
+        errActual = cause.actual;
+        errOperator = cause.operator ?? errOperator;
+        errIsAssertion = true;
+      }
       if (failureType === kTestCodeFailure) {
         errMsg = cause?.message ?? errMsg;
       }
@@ -201,6 +214,14 @@ function jsToYaml(indent, name, value) {
       result += jsToYaml(indent, 'code', errCode);
     }
 
+    if (errIsAssertion) {
+      result += jsToYaml(indent, 'expected', errExpected);
+      result += jsToYaml(indent, 'actual', errActual);
+      if (errOperator) {
+        result += jsToYaml(indent, 'operator', errOperator);
+      }
+    }
+
     if (typeof errStack === 'string') {
       const frames = [];
 
@@ -229,4 +250,8 @@ function jsToYaml(indent, name, value) {
   return result;
 }
 
+function isAssertionLike(value) {
+  return value && typeof value === 'object' && 'expected' in value && 'actual' in value;
+}
+
 module.exports = { TapStream };
@@ -123,6 +123,9 @@ not ok 13 - async assertion fail
     true !== false
 
   code: 'ERR_ASSERTION'
+  expected: false
+  actual: true
+  operator: 'strictEqual'
   stack: |-
     *
     *
 
@@ -133,6 +133,9 @@ not ok 13 - async assertion fail
     true !== false
 
   code: 'ERR_ASSERTION'
+  expected: false
+  actual: true
+  operator: 'strictEqual'
   stack: |-
     *
     *
Original file line number	Diff line number	Diff line change
`@@ -123,6 +123,9 @@ not ok 13 - async assertion fail`
`123`	`123`	`true !== false`
`124`	`124`
`125`	`125`	`code: 'ERR_ASSERTION'`
	`126`	`+ expected: false`
	`127`	`+ actual: true`
	`128`	`+ operator: 'strictEqual'`
`126`	`129`	`stack: \|-`
`127`	`130`	`*`
`128`	`131`	`*`
Original file line number	Diff line number	Diff line change
`@@ -133,6 +133,9 @@ not ok 13 - async assertion fail`
`133`	`133`	`true !== false`
`134`	`134`
`135`	`135`	`code: 'ERR_ASSERTION'`
	`136`	`+ expected: false`
	`137`	`+ actual: true`
	`138`	`+ operator: 'strictEqual'`
`136`	`139`	`stack: \|-`
`137`	`140`	`*`
`138`	`141`	`*`