From f9eb0d14971b040b73ee0b14c737c960b375dc1a Mon Sep 17 00:00:00 2001
From: Glavo <zjx001202@gmail.com>
Date: Thu, 7 Nov 2024 18:00:25 +0800
Subject: [PATCH] Create EitherTest

---
 src/test/java/kala/control/EitherTest.java | 62 ++++++++++++++++++++++
 src/test/java/kala/control/ResultTest.java |  1 -
 src/test/util/kala/TestValue.java          | 23 ++++++++
 3 files changed, 85 insertions(+), 1 deletion(-)
 create mode 100644 src/test/java/kala/control/EitherTest.java
 create mode 100644 src/test/util/kala/TestValue.java

diff --git a/src/test/java/kala/control/EitherTest.java b/src/test/java/kala/control/EitherTest.java
new file mode 100644
index 00000000..96a11783
--- /dev/null
+++ b/src/test/java/kala/control/EitherTest.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2024 Glavo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package kala.control;
+
+import kala.TestValue;
+import org.junit.jupiter.api.*;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public final class EitherTest {
+    private final TestValue<?> value = new TestValue<>("value");
+    private final TestValue<?> otherValue = new TestValue<>("otherValue");
+
+    private final Either.Left<TestValue<?>, ?> left = Either.left(value);
+    private final Either.Right<?, TestValue<?>> right = Either.right(value);
+
+    @Test
+    public void swapTest() {
+        assertEquals(left, right.swap());
+        assertEquals(right, left.swap());
+    }
+
+    @Test
+    public void toResultTest() {
+        assertEquals(Result.ok(value), right.toResult());
+        assertEquals(Result.err(value), left.toResult());
+    }
+
+    @Test
+    public void leftProjectionTest() {
+        assertTrue(left.leftProjection().isDefined());
+        assertFalse(right.leftProjection().isDefined());
+
+        assertEquals(Either.left(otherValue), left.leftProjection().map(it -> otherValue).getEither());
+        assertEquals(right, right.leftProjection().map(it -> otherValue).getEither());
+    }
+
+    @Test
+    public void rightProjectionTest() {
+        assertFalse(left.rightProjection().isDefined());
+        assertTrue(right.rightProjection().isDefined());
+
+        assertEquals(left, left.rightProjection().map(it -> otherValue).getEither());
+        assertEquals(Either.right(otherValue), right.rightProjection().map(it -> otherValue).getEither());
+    }
+
+    private EitherTest() {
+    }
+}
diff --git a/src/test/java/kala/control/ResultTest.java b/src/test/java/kala/control/ResultTest.java
index 16bbb745..5501822c 100644
--- a/src/test/java/kala/control/ResultTest.java
+++ b/src/test/java/kala/control/ResultTest.java
@@ -20,7 +20,6 @@
 
 import java.io.IOException;
 import java.util.NoSuchElementException;
-import java.util.Objects;
 
 import static org.junit.jupiter.api.Assertions.*;
 
diff --git a/src/test/util/kala/TestValue.java b/src/test/util/kala/TestValue.java
new file mode 100644
index 00000000..4f117e57
--- /dev/null
+++ b/src/test/util/kala/TestValue.java
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2024 Glavo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package kala;
+
+public record TestValue<T>(T value) {
+    @Override
+    public boolean equals(Object obj) {
+        return this == obj;
+    }
+}