initial impl

2 files changed, 136 insertions, 0 deletions

diff --git a/src/test/java/org/pacien/lemonad/validation/ValidationResultTest.java b/src/test/java/org/pacien/lemonad/validation/ValidationResultTest.java
new file mode 100644
index 0000000..65b2cb3
--- /dev/null
+++ b/src/test/java/org/pacien/lemonad/validation/ValidationResultTest.java
@@ -0,0 +1,75 @@
+/*
+ * lemonad - Some functional sweetness for Java
+ * Copyright (C) 2019  Pacien TRAN-GIRARD
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package org.pacien.lemonad.validation;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.fail;
+
+/**
+ * @author pacien
+ */
+class ValidationResultTest {
+  @Test void testValidResult() {
+    var subject = "subject";
+    var validationResult = ValidationResult.valid(subject);
+    assertTrue(validationResult.getErrors().isEmpty());
+    assertTrue(validationResult.isValid());
+    assertFalse(validationResult.isInvalid());
+    validationResult.ifValid(innerSubject -> assertEquals(subject, innerSubject));
+    validationResult.ifInvalid((__, ___) -> fail());
+  }
+
+  @Test void testInvalidResult() {
+    var subject = "subject";
+    var errors = List.of(0, 1);
+    var validationResult = ValidationResult.invalid(subject, 0, 1);
+    assertEquals(errors, validationResult.getErrors());
+    assertFalse(validationResult.isValid());
+    assertTrue(validationResult.isInvalid());
+    validationResult.ifValid(Assertions::fail);
+    validationResult.ifInvalid((innerSubject, innerErrors) -> {
+      assertEquals(subject, innerSubject);
+      assertEquals(errors, innerErrors);
+    });
+  }
+
+  @Test void testFlatMap() {
+    ValidationResult.valid("subject")
+                    .ifInvalid((__, ___) -> fail())
+                    .flatMap(res -> ValidationResult.invalid(res.getSubject(), 0))
+                    .ifValid(innerSubject -> fail());
+  }
+
+  @Test void testMerge() {
+    var subject = "subject";
+    assertEquals(List.of(0, 1, 2, 3), ValidationResult.merge(subject, Stream.of(
+      ValidationResult.valid(subject),
+      ValidationResult.invalid(subject, 0, 1),
+      ValidationResult.invalid(subject, 2, 3))
+    ).getErrors());
+  }
+}
diff --git a/src/test/java/org/pacien/lemonad/validation/ValidatorTest.java b/src/test/java/org/pacien/lemonad/validation/ValidatorTest.java
new file mode 100644
index 0000000..55927b5
--- /dev/null
+++ b/src/test/java/org/pacien/lemonad/validation/ValidatorTest.java
@@ -0,0 +1,61 @@
+/*
+ * lemonad - Some functional sweetness for Java
+ * Copyright (C) 2019  Pacien TRAN-GIRARD
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package org.pacien.lemonad.validation;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static java.util.function.Predicate.not;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * @author pacien
+ */
+class ValidatorTest {
+  @Test void testValidatorEnsuringPredicate() {
+    var emptyError = 0;
+    var validator = Validator.ensuringPredicate(not(String::isEmpty), emptyError);
+    assertEquals(List.of(emptyError), validator.validate("").getErrors());
+    assertEquals(List.of(), validator.validate("test").getErrors());
+  }
+
+  @Test void testValidatorValidatingAll() {
+    var emptyError = 0;
+    var tooLongError = 1;
+    var containsBadLetterError = 2;
+
+    var validator = Validator.validatingAll(
+      Validator.ensuringPredicate(not(String::isEmpty), emptyError),
+      Validator.ensuringPredicate((String str) -> str.length() < 10, tooLongError),
+      Validator.ensuringPredicate((String str) -> !str.contains("e"), containsBadLetterError));
+
+    assertEquals(List.of(emptyError), validator.validate("").getErrors());
+    assertEquals(List.of(tooLongError, containsBadLetterError), validator.validate("test test test").getErrors());
+    assertEquals(List.of(), validator.validate("potato").getErrors());
+  }
+
+  @Test void testValidatingField() {
+    var emptyError = 0;
+    var fieldValidator = Validator.ensuringPredicate((Integer len) -> len > 0, emptyError);
+    var validator = Validator.validatingField(String::length, fieldValidator);
+    assertEquals(List.of(emptyError), validator.validate("").getErrors());
+    assertEquals(List.of(), validator.validate("test").getErrors());
+  }
+}