[fix] Fix bug in functionName regex during stack parsing

Previously, this line was splitting on the letter 's'; more likely, it was meant to split on spaces.

lib/test.js

@@ -282,7 +282,7 @@ Test.prototype._assert = function assert (ok, opts) {
 
             // Function call description may not (just) be a function name.
             // Try to extract function name by looking at first "word" only.
-            res.functionName = callDescription.split(/s+/)[0]
+            res.functionName = callDescription.split(/\s+/)[0]
             res.file = filePath;
             res.line = Number(m[3]);
             if (m[4]) res.column = Number(m[4]);

test/stackTrace.js

@@ -68,6 +68,42 @@ tap.test('preserves stack trace with newlines', function (tt) {
     });
 });
 
+tap.test('parses function name from original stack', function (tt) {
+    tt.plan(1);
+
+    var test = tape.createHarness();
+    test.createStream();
+
+    test._results._watch = function (t) {
+        t.on('result', function (res) {
+            tt.equal('Test.testFunctionNameParsing', res.functionName)
+        });
+    };
+
+    test('t.equal stack trace', function testFunctionNameParsing(t) {
+        t.equal(true, false, 'true should be false');
+        t.end();
+    });
+});
+
+tap.test('parses function name from original stack for anonymous function', function (tt) {
+    tt.plan(1);
+
+    var test = tape.createHarness();
+    test.createStream();
+
+    test._results._watch = function (t) {
+        t.on('result', function (res) {
+            tt.equal('Test.<anonymous>', res.functionName)
+        });
+    };
+
+    test('t.equal stack trace', function (t) {
+        t.equal(true, false, 'true should be false');
+        t.end();
+    });
+});
+
 tap.test('preserves stack trace for failed assertions', function (tt) {
     tt.plan(6);
 
@@ -214,4 +250,4 @@ function getDiag (body) {
 
 function stripAt (body) {
     return body.replace(/^\s*at:\s+Test.*$\n/m, '');
-}
+}