add binary dictionary test

src/test/java/com/worksap/nlp/sudachi/JapaneseDictionaryTest.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 Works Applications Co., Ltd.
+ * Copyright (c) 2024-2025 Works Applications Co., Ltd.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -60,27 +60,18 @@ class JapaneseDictionaryTest {
   @Test
   fun throwExceptionOnUsingIncompatibleDicts() {
     // build another system dict (should have different signature)
-    val anotherSystemDictData: MemChannel = run {
-      val chan = MemChannel()
-      DicBuilder.system()
-          .matrix(res("/dict/matrix.def"))
-          .lexicon(res("/dict/lex.csv"))
-          .comment("another system dictionary for the unit tests")
-          .build(chan)
-      chan
-    }
-    val anotherSystemDict = BinaryDictionary.loadSystem(anotherSystemDictData.buffer())
+    val anotherSystemDict =
+        BinaryDictionary.loadSystem(
+            TestDictionary.buildSystemDictData("another system dictionary for the unit tests")
+                .buffer())
 
     // build user dict based on another system dict
-    val anotherUserDictData = run {
-      val chan = MemChannel()
-      DicBuilder.user().system(anotherSystemDict).lexicon(res("/dict/user.csv")).build(chan)
-      chan
-    }
-    val anotherUserDict = BinaryDictionary.loadUser(anotherUserDictData.buffer())
+    val anotherUserDict =
+        BinaryDictionary.loadUser(
+            TestDictionary.buildUserDictData(anotherSystemDict, res("/dict/user.csv")).buffer())
 
     // TestDictionary.systemDict + another user dict
-    val confAnotherUser = TestDictionary.user0Cfg().addUserDictionary(anotherUserDict)
+    val confAnotherUser = TestDictionary.user1Cfg().addUserDictionary(anotherUserDict)
     assertFailsWith(IllegalArgumentException::class) { Dictionary.load(confAnotherUser) }
 
     // another system dict + TestDictionary.userDict

src/test/java/com/worksap/nlp/sudachi/TestDictionary.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2024 Works Applications Co., Ltd.
+ * Copyright (c) 2017-2025 Works Applications Co., Ltd.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,31 +19,35 @@ package com.worksap.nlp.sudachi
 import com.worksap.nlp.sudachi.dictionary.BinaryDictionary
 import com.worksap.nlp.sudachi.dictionary.build.DicBuilder
 import com.worksap.nlp.sudachi.dictionary.build.MemChannel
+import java.net.URL
 
 /** Utility for lazily creating binary dictionaries for test */
 object TestDictionary {
-  val systemDictData: MemChannel by lazy {
-    val result = MemChannel()
+  fun buildSystemDictData(comment: String): MemChannel {
+    val chan = MemChannel()
     DicBuilder.system()
         .matrix(res("/dict/matrix.def"))
         .lexicon(res("/dict/lex.csv"))
-        .comment("the system dictionary for the unit tests")
-        .build(result)
-    result
+        .comment(comment)
+        .signature(null)
+        .build(chan)
+    return chan
   }
 
-  val userDict1Data: MemChannel by lazy {
+  fun buildUserDictData(system: BinaryDictionary, url: URL): MemChannel {
     val chan = MemChannel()
-    DicBuilder.user().system(systemDict).lexicon(res("/dict/user.csv")).build(chan)
-    chan
+    DicBuilder.user().system(system).lexicon(url).build(chan)
+    return chan
   }
 
-  val userDict2Data: MemChannel by lazy {
-    val chan = MemChannel()
-    DicBuilder.user().system(systemDict).lexicon(res("/dict/user2.csv")).build(chan)
-    chan
+  val systemDictData: MemChannel by lazy {
+    buildSystemDictData("the system dictionary for the unit tests")
   }
 
+  val userDict1Data: MemChannel by lazy { buildUserDictData(systemDict, res("/dict/user.csv")) }
+
+  val userDict2Data: MemChannel by lazy { buildUserDictData(systemDict, res("/dict/user2.csv")) }
+
   val systemDict: BinaryDictionary
     get() = BinaryDictionary.loadSystem(systemDictData.buffer())
 

src/test/java/com/worksap/nlp/sudachi/dictionary/BinaryDictionaryTest.kt

@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2025 Works Applications Co., Ltd.
+ *
+ * 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 com.worksap.nlp.sudachi
+
+import com.worksap.nlp.sudachi.dictionary.BinaryDictionary
+import java.io.IOException
+import kotlin.test.Test
+import kotlin.test.assertFailsWith
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+class BinaryDictionaryTest {
+  @Test
+  fun failToLoadSystemAsUser() {
+    assertFailsWith(IOException::class) {
+      BinaryDictionary.loadUser(TestDictionary.systemDictData.buffer())
+    }
+  }
+
+  @Test
+  fun failToLoadUserAsSystem() {
+    assertFailsWith(IOException::class) {
+      BinaryDictionary.loadSystem(TestDictionary.userDict1Data.buffer())
+    }
+  }
+
+  @Test
+  fun compatibleDicts() {
+    assertTrue(TestDictionary.systemDict.isCompatibleWith(TestDictionary.systemDict))
+    assertTrue(TestDictionary.userDict1.isCompatibleWith(TestDictionary.userDict1))
+
+    assertTrue(TestDictionary.systemDict.isCompatibleWith(TestDictionary.userDict1))
+    assertTrue(TestDictionary.userDict1.isCompatibleWith(TestDictionary.systemDict))
+    assertTrue(TestDictionary.userDict1.isCompatibleWith(TestDictionary.userDict2))
+  }
+
+  @Test
+  fun incompatibleDicts() {
+    // build another system dict (should have different signature)
+    val anotherSystemDict =
+        BinaryDictionary.loadSystem(
+            TestDictionary.buildSystemDictData("another system dictionary for the unit tests")
+                .buffer())
+    val anotherUserDict =
+        BinaryDictionary.loadUser(
+            TestDictionary.buildUserDictData(anotherSystemDict, res("/dict/user.csv")).buffer())
+    assertTrue(anotherSystemDict.isCompatibleWith(anotherUserDict))
+
+    assertFalse(anotherSystemDict.isCompatibleWith(TestDictionary.systemDict))
+    assertFalse(anotherSystemDict.isCompatibleWith(TestDictionary.userDict1))
+    assertFalse(anotherUserDict.isCompatibleWith(TestDictionary.systemDict))
+    assertFalse(anotherUserDict.isCompatibleWith(TestDictionary.userDict2))
+  }
+}