Add add config validators

src/configloader/ValidateInstanceLink_test.go

@@ -0,0 +1,55 @@
+package configloader
+
+import (
+    "testing"
+)
+
+// Test that ValidateInstanceLink() fails on non-URLs.
+func TestValidateInstanceFailsOnNonUrl(t *testing.T) {
+
+    _, err := ValidateInstanceLink("abcmuseum-digital.org")
+
+    if err == nil {
+        t.Fatalf("ValidateInstanceLink() does not return an error on a non-URL")
+    }
+
+}
+
+// Test that ValidateInstanceLink() fails on links outside of md.
+func TestValidateInstanceLinkFailsOutsideOfMd(t *testing.T) {
+
+    _, err := ValidateInstanceLink("test.museum-digital.de")
+
+    if err == nil {
+        t.Fatalf("ValidateInstanceLink() accepts URLs outside of the main museum-digital")
+    }
+
+}
+
+// Test that ValidateInstanceLink() fails on valid md aggregated instances
+// (uploads can only happen to regional instances / those that have a dedicated
+// instance of musdb).
+func TestValidateInstanceLinkFailsWithAggregatedInstance(t *testing.T) {
+
+    _, err := ValidateInstanceLink("https://nat.museum-digital.de")
+
+    if err == nil {
+        t.Fatalf("ValidateInstanceLink() accepts URLs of aggregated instance")
+    }
+
+}
+
+// Test that ValidateInstanceLink() works with a valid instance of md.
+func TestValidateInstanceWorks(t *testing.T) {
+
+    result, err := ValidateInstanceLink("https://hessen.museum-digital.de")
+
+    if err != nil {
+        t.Fatalf("ValidateInstanceLink() returns an error where it should work")
+    }
+    if result != "https://hessen.museum-digital.de" {
+        t.Fatalf("Output of ValidateInstanceLink() is not https://hessen.museum-digital.de where it should be")
+    }
+
+
+}