feat: overwrite Run method.

Author: ghosind

assertion.go

@@ -19,3 +19,16 @@ func New(t *testing.T) *Assertion {
 
 	return a
 }
+
+// Run runs f as a subtest of a called name. It runs f in a separate goroutine
+// and blocks until f returns or calls a.Parallel to become a parallel test.
+// Run reports whether f succeeded (or at least did not fail before calling t.Parallel).
+//
+// Run may be called simultaneously from multiple goroutines, but all such calls
+// must return before the outer test function for a returns.
+func (assertion *Assertion) Run(name string, f func(a *Assertion)) bool {
+	return assertion.T.Run(name, func(t *testing.T) {
+		subAssertion := New(t)
+		f(subAssertion)
+	})
+}

assertion_test.go

@@ -13,3 +13,15 @@ func TestNewAssertion(t *testing.T) {
 		New(new(testing.T))
 	})
 }
+
+func TestRun(t *testing.T) {
+	a := New(t)
+	isSubTestRun := false
+
+	a.Run("sub test", func(sub *Assertion) {
+		DeepEqualNow(t, sub.Name(), "TestRun/sub_test")
+		isSubTestRun = true
+	})
+
+	DeepEqualNow(t, isSubTestRun, true)
+}