added isGeneric method and tests

checker_test.go

@@ -0,0 +1,53 @@
+package checker_test
+
+import (
+	"testing"
+
+	"github.com/lukerodham/email-checker"
+)
+
+func TestIsGeneric(t *testing.T) {
+	tests := []struct {
+		Email       string
+		IsGeneric   bool
+		ShouldError bool
+	}{
+		{
+			Email:       "example@gmail.com",
+			IsGeneric:   true,
+			ShouldError: false,
+		},
+		{
+			Email:       "example@hotmail.com",
+			IsGeneric:   true,
+			ShouldError: false,
+		},
+		{
+			Email:       "example@yahoo.com",
+			IsGeneric:   true,
+			ShouldError: false,
+		},
+		{
+			Email:       "example@google.com",
+			IsGeneric:   false,
+			ShouldError: false,
+		},
+		{
+			Email:       "yahoo.com",
+			IsGeneric:   false,
+			ShouldError: true,
+		},
+	}
+
+	for _, test := range tests {
+		is, err := checker.IsGeneric(test.Email)
+
+		if err != nil && test.ShouldError == false {
+			t.Error(err)
+		}
+
+		if test.IsGeneric != is {
+			t.Errorf("expect %v to equal %v", test.IsGeneric, is)
+		}
+	}
+}