Add 4 more AL/BC testing patterns from Luc van Vugt's fluxxus.nl blog

Fourth batch from CURABIS ApS, mined from an external BC/NAV testing expert's blog archive (fluxxus.nl). Confirm+StrSubstNo interaction with ConfirmHandler, Table Relation Test's OnAfterRemoveTableRelation exclusion hook (verified against BCApps source, codeunit 134926), committing shared lazy-Initialize fixture data, and Assert.IsFalse vs asserterror for boolean checks.

microsoft/knowledge/testing/commit-shared-test-fixture-inside-lazy-initialize.bad.al

@@ -0,0 +1,19 @@
+codeunit 50142 "Sample Test Library"
+{
+    var
+        Initialized: Boolean;
+
+    procedure Initialize()
+    begin
+        if Initialized then
+            exit;
+
+        CreateSharedFixtureData();
+        Initialized := true;
+    end;
+
+    local procedure CreateSharedFixtureData()
+    begin
+        // insert master/setup data shared across every test in this codeunit
+    end;
+}