Add error marshaling tests.

api/errors_test.go

@@ -0,0 +1,65 @@
+package api
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+)
+
+func TestError_MarshalJSON(t *testing.T) {
+	type fields struct {
+		Status int
+		Err    error
+	}
+	tests := []struct {
+		name    string
+		fields  fields
+		want    []byte
+		wantErr bool
+	}{
+		{"ok", fields{400, fmt.Errorf("bad request")}, []byte(`{"status":400,"message":"Bad Request"}`), false},
+		{"ok no error", fields{500, nil}, []byte(`{"status":500,"message":"Internal Server Error"}`), false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			e := &Error{
+				Status: tt.fields.Status,
+				Err:    tt.fields.Err,
+			}
+			got, err := e.MarshalJSON()
+			if (err != nil) != tt.wantErr {
+				t.Errorf("Error.MarshalJSON() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("Error.MarshalJSON() = %s, want %s", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestError_UnmarshalJSON(t *testing.T) {
+	type args struct {
+		data []byte
+	}
+	tests := []struct {
+		name     string
+		args     args
+		expected *Error
+		wantErr  bool
+	}{
+		{"ok", args{[]byte(`{"status":400,"message":"bad request"}`)}, &Error{Status: 400, Err: fmt.Errorf("bad request")}, false},
+		{"fail", args{[]byte(`{"status":"400","message":"bad request"}`)}, &Error{}, true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			e := new(Error)
+			if err := e.UnmarshalJSON(tt.args.data); (err != nil) != tt.wantErr {
+				t.Errorf("Error.UnmarshalJSON() error = %v, wantErr %v", err, tt.wantErr)
+			}
+			if !reflect.DeepEqual(tt.expected, e) {
+				t.Errorf("Error.UnmarshalJSON() wants = %v, got %v", tt.expected, e)
+			}
+		})
+	}
+}