Refactor links_test to use table test and cleaner error check

Signed-off-by: Jared Scheib <jared.scheib@gmail.com>

server/links_test.go

@@ -1,35 +1,60 @@
 package server
 
 import (
+	"reflect"
 	"testing"
 )
 
 func TestNewCustomLinks(t *testing.T) {
-	customLinks := map[string]string{
-		"cubeapple": "https://cube.apple",
-	}
-	if customLink, err := NewCustomLinks(customLinks); customLink == nil || err != nil {
-		t.Errorf("Unknown error in NewCustomLinks: %v", err)
+	tests := []struct {
+		name    string
+		args    map[string]string
+		want    []CustomLink
+		wantErr bool
+	}{
+		{
+			name: "Unknown error in NewCustomLinks",
+			args: map[string]string{
+				"cubeapple": "https://cube.apple",
+			},
+			want: []CustomLink{
+				{
+					Name: "cubeapple",
+					URL:  "https://cube.apple",
+				},
+			},
+		},
+		{
+			name: "CustomLink missing key for Name",
+			args: map[string]string{
+				"": "https://cube.apple",
+			},
+			wantErr: true,
+		},
+		{
+			name: "CustomLink missing value for URL",
+			args: map[string]string{
+				"cubeapple": "",
+			},
+			wantErr: true,
+		},
+		{
+			name: "Missing protocol scheme",
+			args: map[string]string{
+				"cubeapple": ":k%8a#",
+			},
+			wantErr: true,
+		},
 	}
 
-	customLinks = map[string]string{
-		"": "https://cube.apple",
-	}
-	if customLink, err := NewCustomLinks(customLinks); customLink != nil || err == nil {
-		t.Error("Expected error: CustomLink missing key for Name")
-	}
-
-	customLinks = map[string]string{
-		"cubeapple": "",
-	}
-	if customLink, err := NewCustomLinks(customLinks); customLink != nil || err == nil {
-		t.Error("Expected error: CustomLink missing value for URL")
-	}
-
-	customLinks = map[string]string{
-		"cubeapple": ":k%8a#",
-	}
-	if customLink, err := NewCustomLinks(customLinks); customLink != nil || err == nil {
-		t.Error("Expected error: missing protocol scheme")
+	for _, tt := range tests {
+		got, err := NewCustomLinks(tt.args)
+		if (err != nil) != tt.wantErr {
+			t.Errorf("%q. NewCustomLinks() error = %v, wantErr %v", tt.name, err, tt.wantErr)
+			continue
+		}
+		if !reflect.DeepEqual(got, tt.want) {
+			t.Errorf("%q. NewCustomLinks() = %v, want %v", tt.name, got, tt.want)
+		}
 	}
 }