refactor: sql-tools (#19717)

server/src/sql-tools/comparers/column.comparer.spec.ts

@@ -0,0 +1,81 @@
+import { compareColumns } from 'src/sql-tools/comparers/column.comparer';
+import { DatabaseColumn, Reason } from 'src/sql-tools/types';
+import { describe, expect, it } from 'vitest';
+
+const testColumn: DatabaseColumn = {
+  name: 'test',
+  tableName: 'table1',
+  nullable: false,
+  isArray: false,
+  type: 'character varying',
+  synchronize: true,
+};
+
+describe('compareColumns', () => {
+  describe('onExtra', () => {
+    it('should work', () => {
+      expect(compareColumns.onExtra(testColumn)).toEqual([
+        {
+          tableName: 'table1',
+          columnName: 'test',
+          type: 'ColumnDrop',
+          reason: Reason.MissingInSource,
+        },
+      ]);
+    });
+  });
+
+  describe('onMissing', () => {
+    it('should work', () => {
+      expect(compareColumns.onMissing(testColumn)).toEqual([
+        {
+          type: 'ColumnAdd',
+          column: testColumn,
+          reason: Reason.MissingInTarget,
+        },
+      ]);
+    });
+  });
+
+  describe('onCompare', () => {
+    it('should work', () => {
+      expect(compareColumns.onCompare(testColumn, testColumn)).toEqual([]);
+    });
+
+    it('should detect a change in type', () => {
+      const source: DatabaseColumn = { ...testColumn };
+      const target: DatabaseColumn = { ...testColumn, type: 'text' };
+      const reason = 'column type is different (character varying vs text)';
+      expect(compareColumns.onCompare(source, target)).toEqual([
+        {
+          columnName: 'test',
+          tableName: 'table1',
+          type: 'ColumnDrop',
+          reason,
+        },
+        {
+          type: 'ColumnAdd',
+          column: source,
+          reason,
+        },
+      ]);
+    });
+
+    it('should detect a comment change', () => {
+      const source: DatabaseColumn = { ...testColumn, comment: 'new comment' };
+      const target: DatabaseColumn = { ...testColumn, comment: 'old comment' };
+      const reason = 'comment is different (new comment vs old comment)';
+      expect(compareColumns.onCompare(source, target)).toEqual([
+        {
+          columnName: 'test',
+          tableName: 'table1',
+          type: 'ColumnAlter',
+          changes: {
+            comment: 'new comment',
+          },
+          reason,
+        },
+      ]);
+    });
+  });
+});