POC

vendor/github.com/onsi/gomega/matchers/be_true_matcher.go

@@ -0,0 +1,28 @@
+// untested sections: 2
+
+package matchers
+
+import (
+	"fmt"
+
+	"github.com/onsi/gomega/format"
+)
+
+type BeTrueMatcher struct {
+}
+
+func (matcher *BeTrueMatcher) Match(actual interface{}) (success bool, err error) {
+	if !isBool(actual) {
+		return false, fmt.Errorf("Expected a boolean.  Got:\n%s", format.Object(actual, 1))
+	}
+
+	return actual.(bool), nil
+}
+
+func (matcher *BeTrueMatcher) FailureMessage(actual interface{}) (message string) {
+	return format.Message(actual, "to be true")
+}
+
+func (matcher *BeTrueMatcher) NegatedFailureMessage(actual interface{}) (message string) {
+	return format.Message(actual, "not to be true")
+}