Fix #1: Add some unit tests

errors_test.go

@@ -0,0 +1,82 @@
+package jira
+
+import (
+	"net/http"
+	"net/url"
+	"testing"
+)
+
+func TestErrorResponse_Empty(t *testing.T) {
+	u, _ := url.Parse("https://issues.apache.org/jira/browse/MESOS-5040")
+	r := &http.Response{
+		Request: &http.Request{
+			Method: "POST",
+			URL:    u,
+		},
+		StatusCode: 200,
+	}
+
+	mockData := []struct {
+		Response ErrorResponse
+		Expected string
+	}{
+		{
+			Response: ErrorResponse{},
+			Expected: "[] map[]",
+		},
+		{
+			Response: ErrorResponse{
+				ErrorMessages: []string{"foo", "bar"},
+			},
+			Expected: "[foo bar] map[]",
+		},
+		{
+			Response: ErrorResponse{
+				Errors: map[string]string{"Foo": "Bar"},
+			},
+			Expected: "[] map[Foo:Bar]",
+		},
+		{
+			Response: ErrorResponse{
+				ErrorMessages: []string{"foo", "bar"},
+				Errors:        map[string]string{"Foo": "Bar"},
+			},
+			Expected: "[foo bar] map[Foo:Bar]",
+		},
+		{
+			Response: ErrorResponse{
+				Response: r,
+			},
+			Expected: "POST https://issues.apache.org/jira/browse/MESOS-5040: 200 [] map[]",
+		},
+		{
+			Response: ErrorResponse{
+				Response:      r,
+				ErrorMessages: []string{"foo", "bar"},
+			},
+			Expected: "POST https://issues.apache.org/jira/browse/MESOS-5040: 200 [foo bar] map[]",
+		},
+		{
+			Response: ErrorResponse{
+				Response: r,
+				Errors:   map[string]string{"Foo": "Bar"},
+			},
+			Expected: "POST https://issues.apache.org/jira/browse/MESOS-5040: 200 [] map[Foo:Bar]",
+		},
+		{
+			Response: ErrorResponse{
+				Response:      r,
+				ErrorMessages: []string{"foo", "bar"},
+				Errors:        map[string]string{"Foo": "Bar"},
+			},
+			Expected: "POST https://issues.apache.org/jira/browse/MESOS-5040: 200 [foo bar] map[Foo:Bar]",
+		},
+	}
+
+	for _, data := range mockData {
+		got := data.Response.Error()
+		if got != data.Expected {
+			t.Errorf("Response is different as expected. Expected \"%s\". Got \"%s\"", data.Expected, got)
+		}
+	}
+}