demo for #46

Author: JohannesJander

src/test/java/io/frictionlessdata/datapackage/PackageTest.java

@@ -7,6 +7,7 @@
 import io.frictionlessdata.datapackage.exceptions.DataPackageFileOrUrlNotFoundException;
 import io.frictionlessdata.datapackage.exceptions.DataPackageValidationException;
 import io.frictionlessdata.datapackage.resource.*;
+import io.frictionlessdata.tableschema.exception.ConstraintsException;
 import io.frictionlessdata.tableschema.exception.ValidationException;
 import io.frictionlessdata.tableschema.field.DateField;
 import io.frictionlessdata.tableschema.schema.Schema;
@@ -968,6 +969,20 @@ public void testReadPackageAllFields() throws Exception{
         Assertions.assertEquals("Example Corp", c.getOrganization());
     }
 
+    @Test
+    // check for https://github.com/frictionlessdata/datapackage-java/issues/46
+    @DisplayName("Show that minimum constraints work")
+    void validateDataPackage() throws Exception {
+        Package dp = this.getDataPackageFromFilePath(
+                "/fixtures/datapackages/constraint-violation/datapackage.json", true);
+        Resource resource = dp.getResource("person_data");
+        ConstraintsException exception = assertThrows(ConstraintsException.class, () -> resource.getData(false, false, true, false));
+
+        // Assert the validation messages
+        Assertions.assertNotNull(exception.getMessage());
+        Assertions.assertFalse(exception.getMessage().isEmpty());
+    }
+
     private static void fingerprintFiles(Path path) {
         List<String> fingerprints = new ArrayList<>();
         MessageDigest md;

src/test/resources/fixtures/datapackages/constraint-violation/data/person.csv

@@ -0,0 +1,5 @@
+firstname,lastname,gender,age
+John,Doe,male,30
+Jane,Smith,female,25
+Alice,Johnson,female,19
+Bob,Williams,male,1

src/test/resources/fixtures/datapackages/constraint-violation/datapackage.json

@@ -0,0 +1,52 @@
+{
+    "name":"csv-validation-using-ig",
+    "description":"Validates Person",
+    "dialect":{
+        "delimiter":","
+    },
+    "resources":[
+        {
+            "name":"person_data",
+            "path":"datapackages/constraint-violation/data/person.csv",
+            "schema":{
+                "fields":[
+                    {
+                        "name":"firstname",
+                        "type":"string",
+                        "description":"The first name of the person.",
+                        "constraints":{
+                            "required":true
+                        }
+                    },
+                    {
+                        "name":"lastname",
+                        "type":"string",
+                        "description":"The last name of the person.",
+                        "constraints":{
+                            "required":true
+                        }
+                    },
+                    {
+                        "name":"gender",
+                        "type":"string",
+                        "description":"Gender of the person. Valid values are 'male' or 'female'.",
+                        "constraints":{
+                            "enum":[
+                                "male",
+                                "female"
+                            ]
+                        }
+                    },
+                    {
+                        "name":"age",
+                        "type":"integer",
+                        "description":"The age of the person. Must be greater than 18.",
+                        "constraints":{
+                            "minimum":19
+                        }
+                    }
+                ]
+            }
+        }
+    ]
+}