From 9fae7709b4a5d8791fc71f8bafdf58badf401f74 Mon Sep 17 00:00:00 2001
From: Mihai-Cristian Condrea <d4rk7355608@gmail.com>
Date: Sun, 14 Sep 2025 10:20:39 +0300
Subject: [PATCH] test: add CodeHighlighter unit tests

---
 .../java/utils/CodeHighlighterTest.java       | 60 +++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 app/src/test/java/com/d4rk/androidtutorials/java/utils/CodeHighlighterTest.java

diff --git a/app/src/test/java/com/d4rk/androidtutorials/java/utils/CodeHighlighterTest.java b/app/src/test/java/com/d4rk/androidtutorials/java/utils/CodeHighlighterTest.java
new file mode 100644
index 00000000..b02037a9
--- /dev/null
+++ b/app/src/test/java/com/d4rk/androidtutorials/java/utils/CodeHighlighterTest.java
@@ -0,0 +1,60 @@
+package com.d4rk.androidtutorials.java.utils;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+
+import com.amrdeveloper.codeview.CodeView;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+import org.junit.Test;
+
+/**
+ * Tests for {@link CodeHighlighter} ensuring themes register syntax patterns and refresh highlighting.
+ */
+public class CodeHighlighterTest {
+
+    @Test
+    public void applyJavaTheme_addsPatternsAndReHighlights() {
+        CodeView codeView = mock(CodeView.class);
+        List<Pattern> patterns = new ArrayList<>();
+        List<Integer> colors = new ArrayList<>();
+
+        doAnswer(invocation -> {
+            patterns.add(invocation.getArgument(0));
+            colors.add(invocation.getArgument(1));
+            return null;
+        }).when(codeView).addSyntaxPattern(any(Pattern.class), anyInt());
+
+        CodeHighlighter.applyJavaTheme(codeView);
+
+        assertEquals(5, patterns.size());
+        assertEquals(5, colors.size());
+        verify(codeView).reHighlightSyntax();
+    }
+
+    @Test
+    public void applyXmlTheme_addsPatternsAndReHighlights() {
+        CodeView codeView = mock(CodeView.class);
+        List<Pattern> patterns = new ArrayList<>();
+        List<Integer> colors = new ArrayList<>();
+
+        doAnswer(invocation -> {
+            patterns.add(invocation.getArgument(0));
+            colors.add(invocation.getArgument(1));
+            return null;
+        }).when(codeView).addSyntaxPattern(any(Pattern.class), anyInt());
+
+        CodeHighlighter.applyXmlTheme(codeView);
+
+        assertEquals(4, patterns.size());
+        assertEquals(4, colors.size());
+        verify(codeView).reHighlightSyntax();
+    }
+}