fix: repair tests of parallel validation

Author: pierrecamilleri

data/invalid/datapackage_no_foreign_key.json

@@ -0,0 +1,49 @@
+{
+    "name": "testing",
+    "resources": [
+        {
+            "name": "data",
+            "path": "data.csv",
+            "schema": {
+                "fields": [
+                    {
+                        "name": "id",
+                        "type": "string",
+                        "constraints": {
+                            "required": true
+                        }
+                    },
+                    {
+                        "name": "name",
+                        "type": "string"
+                    },
+                    {
+                        "name": "description",
+                        "type": "string"
+                    },
+                    {
+                        "name": "amount",
+                        "type": "number"
+                    }
+                ],
+                "primaryKey": "id"
+            }
+        },
+        {
+            "name": "data2",
+            "path": "data2.csv",
+            "schema": {
+                "fields": [
+                    {
+                        "type": "string",
+                        "name": "parent"
+                    },
+                    {
+                        "type": "string",
+                        "name": "comment"
+                    }
+                ]
+            }
+        }
+    ]
+}

frictionless/validator/__spec__/package/test_parallel.py

@@ -6,18 +6,21 @@
 
 # General
 
+# Note: to test parallel validation, do not use foreign keys to prevent an
+# automatic fallback on single-core execution
+
 
 @pytest.mark.ci
 def test_package_validate_parallel_from_dict():
-    with open("data/package/datapackage.json") as file:
-        package = Package(json.load(file), basepath="data/package")
+    with open("data/datapackage.json") as file:
+        package = Package(json.load(file), basepath="data")
         report = package.validate(parallel=True)
         assert report.valid
 
 
 @pytest.mark.ci
 def test_package_validate_parallel_from_dict_invalid():
-    with open("data/invalid/datapackage.json") as file:
+    with open("data/invalid/datapackage_no_foreign_key.json") as file:
         package = Package(json.load(file), basepath="data/invalid")
         report = package.validate(parallel=True)
         assert report.flatten(["taskNumber", "rowNumber", "fieldNumber", "type"]) == [
@@ -29,7 +32,7 @@ def test_package_validate_parallel_from_dict_invalid():
 
 @pytest.mark.ci
 def test_package_validate_with_parallel():
-    package = Package("data/invalid/datapackage.json")
+    package = Package("data/invalid/datapackage_no_foreign_key.json")
     report = package.validate(parallel=True)
     assert report.flatten(["taskNumber", "rowNumber", "fieldNumber", "type"]) == [
         [1, 3, None, "blank-row"],