1 files changed, 67 insertions, 0 deletions
diff --git a/errors_test.go b/errors_test.go
new file mode 100644
index 0000000..7b4c7a4
--- /dev/null
+++ b/errors_test.go
@@ -0,0 +1,67 @@
+package pflag
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestNotExistError(t *testing.T) {
+	err := &NotExistError{
+		name:                "foo",
+		specifiedShorthands: "bar",
+	}
+
+	if err.GetSpecifiedName() != "foo" {
+		t.Errorf("Expected GetSpecifiedName to return %q, got %q", "foo", err.GetSpecifiedName())
+	}
+	if err.GetSpecifiedShortnames() != "bar" {
+		t.Errorf("Expected GetSpecifiedShortnames to return %q, got %q", "bar", err.GetSpecifiedShortnames())
+	}
+}
+
+func TestValueRequiredError(t *testing.T) {
+	err := &ValueRequiredError{
+		flag:                &Flag{},
+		specifiedName:       "foo",
+		specifiedShorthands: "bar",
+	}
+
+	if err.GetFlag() == nil {
+		t.Error("Expected GetSpecifiedName to return its flag field, but got nil")
+	}
+	if err.GetSpecifiedName() != "foo" {
+		t.Errorf("Expected GetSpecifiedName to return %q, got %q", "foo", err.GetSpecifiedName())
+	}
+	if err.GetSpecifiedShortnames() != "bar" {
+		t.Errorf("Expected GetSpecifiedShortnames to return %q, got %q", "bar", err.GetSpecifiedShortnames())
+	}
+}
+
+func TestInvalidValueError(t *testing.T) {
+	expectedCause := errors.New("error")
+	err := &InvalidValueError{
+		flag:  &Flag{},
+		value: "foo",
+		cause: expectedCause,
+	}
+
+	if err.GetFlag() == nil {
+		t.Error("Expected GetSpecifiedName to return its flag field, but got nil")
+	}
+	if err.GetValue() != "foo" {
+		t.Errorf("Expected GetValue to return %q, got %q", "foo", err.GetValue())
+	}
+	if err.Unwrap() != expectedCause {
+		t.Errorf("Expected Unwrwap to return %q, got %q", expectedCause, err.Unwrap())
+	}
+}
+
+func TestInvalidSyntaxError(t *testing.T) {
+	err := &InvalidSyntaxError{
+		specifiedFlag: "--=",
+	}
+
+	if err.GetSpecifiedFlag() != "--=" {
+		t.Errorf("Expected GetSpecifiedFlag to return %q, got %q", "--=", err.GetSpecifiedFlag())
+	}
+}