add more jsonschema tests

Author: kvch

internal/jsonschema/testdata/create-constraint-4-invalid-fk-nulls.txtar

@@ -0,0 +1,35 @@
+This is an invalid 'create_constraint' migration.
+Foreign key constraints cannot configure nulls_not_distinct.
+
+-- create_constraint.json --
+{
+  "name": "migration_name",
+  "operations": [
+    {
+      "create_constraint": {
+        "name": "my_invalid_check",
+        "table": "my_table",
+        "type": "foreign_key",
+        "nulls_not_distinct": true,
+        "references": {
+          "columns": ["title"],
+          "table": "referenced",
+          "on_delete": "CASCADE",
+          "on_update": "SET NULL"
+        },
+        "columns": [
+          "my_column"
+        ],
+        "up": {
+          "my_column": "my_column"
+        },
+        "down": {
+          "my_column": "my_column"
+        }
+      }
+    }
+  ]
+}
+
+-- valid --
+false

internal/jsonschema/testdata/create-constraint-5-valid-unique-nulls.txtar

@@ -0,0 +1,28 @@
+This is an valid 'create_constraint' migration.
+
+-- create_constraint.json --
+{
+  "name": "migration_name",
+  "operations": [
+    {
+      "create_constraint": {
+        "name": "my_invalid_check",
+        "table": "my_table",
+        "type": "unique",
+        "nulls_not_distinct": true,
+        "columns": [
+          "my_column"
+        ],
+        "up": {
+          "my_column": "my_column"
+        },
+        "down": {
+          "my_column": "my_column"
+        }
+      }
+    }
+  ]
+}
+
+-- valid --
+true

internal/jsonschema/testdata/create-invalid-index.txtar renamed to internal/jsonschema/testdata/create-index-1-invalid-method.txtar

@@ -0,0 +1,21 @@
+This is an invalid 'create_index' migration.
+Only unique indexes can set null_not_distinct.
+
+-- create_index.json --
+{
+  "name": "migration_name",
+  "operations": [
+    {
+      "create_index": {
+        "name": "reviews_index",
+        "columns": {
+            "my-column": {}
+        },
+        "nulls_not_distinct": true
+      }
+    }
+  ]
+}
+
+-- valid --
+false

internal/jsonschema/testdata/create-index-2-invalid-not-unique-nulls.txtar

@@ -0,0 +1,22 @@
+This is an valid 'create_index' migration.
+
+-- create_index.json --
+{
+  "name": "migration_name",
+  "operations": [
+    {
+      "create_index": {
+        "name": "reviews_index",
+        "table": "my_table",
+        "columns": {
+            "my-column": {}
+        },
+        "unique": true,
+        "nulls_not_distinct": true
+      }
+    }
+  ]
+}
+
+-- valid --
+true

internal/jsonschema/testdata/create-index-3-valid-unique-nulls.txtar

@@ -623,6 +623,24 @@
           "default": false
         }
       },
+      "allOf": [
+        {
+          "if": {
+            "properties": {
+              "unique": {
+                "const": false
+              }
+            }
+          },
+          "then": {
+            "properties": {
+              "nulls_not_distinct": {
+                "const": false
+              }
+            }
+          }
+        }
+      ],
       "required": ["columns", "name", "table"],
       "type": "object"
     },