Styling: added simple unit tests

flatlaf-core/build.gradle.kts

@@ -21,6 +21,11 @@ plugins {
 	`flatlaf-publish`
 }
 
+dependencies {
+	testImplementation( "org.junit.jupiter:junit-jupiter-api:5.7.2" )
+	testRuntimeOnly( "org.junit.jupiter:junit-jupiter-engine" )
+}
+
 java {
 	withSourcesJar()
 	withJavadocJar()
@@ -52,6 +57,10 @@ tasks {
 	named<Jar>( "javadocJar" ) {
 		archiveBaseName.set( "flatlaf" )
 	}
+
+	test {
+		useJUnitPlatform()
+	}
 }
 
 flatlafPublish {

flatlaf-core/src/test/java/com/formdev/flatlaf/ui/FlatStylingTests.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2021 FormDev Software GmbH
+ *
+ * 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
+ *
+ *     https://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.formdev.flatlaf.ui;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import java.awt.Color;
+import java.util.HashMap;
+import java.util.Map;
+import org.junit.jupiter.api.Test;
+
+/**
+ * @author Karl Tauber
+ */
+public class FlatStylingTests
+{
+	@Test
+	void parse() {
+		assertEquals( null, FlatStyleSupport.parse( null ) );
+		assertEquals( null, FlatStyleSupport.parse( "" ) );
+		assertEquals( null, FlatStyleSupport.parse( "  " ) );
+		assertEquals( null, FlatStyleSupport.parse( ";" ) );
+		assertEquals( null, FlatStyleSupport.parse( " ; ; " ) );
+
+		assertEquals(
+			expectedMap( "background", Color.WHITE ),
+			FlatStyleSupport.parse( "background: #fff" ) );
+		assertEquals(
+			expectedMap( "background", Color.WHITE, "foreground", Color.BLACK ),
+			FlatStyleSupport.parse( "background: #fff; foreground: #000" ) );
+		assertEquals(
+			expectedMap( "background", Color.WHITE, "foreground", Color.BLACK, "someWidth", 20 ),
+			FlatStyleSupport.parse( "background: #fff; foreground: #000; someWidth: 20" ) );
+	}
+
+	private Map<Object, Object> expectedMap( Object... keyValuePairs ) {
+		Map<Object, Object> map = new HashMap<>();
+		for( int i = 0; i < keyValuePairs.length; i += 2 )
+			map.put( keyValuePairs[i], keyValuePairs[i+1] );
+		return map;
+	}
+
+	@Test
+	void checkbox() {
+		FlatCheckBoxUI ui = new FlatCheckBoxUI( false );
+
+		ui.applyStyle( "disabledText: #fff" );
+	}
+
+	@Test
+	void radiobutton() {
+		FlatRadioButtonUI ui = new FlatRadioButtonUI( false );
+
+		ui.applyStyle( "disabledText: #fff" );
+	}
+
+	@Test
+	void slider() {
+		FlatSliderUI ui = new FlatSliderUI();
+
+		ui.applyStyle( "trackWidth: 2" );
+		ui.applyStyle( "thumbSize: 12,12" );
+		ui.applyStyle( "focusWidth: 4" );
+
+		ui.applyStyle( "trackValueColor: #fff" );
+		ui.applyStyle( "trackColor: #fff" );
+		ui.applyStyle( "thumbColor: #fff" );
+		ui.applyStyle( "thumbBorderColor: #fff" );
+		ui.applyStyle( "focusedColor: #fff" );
+		ui.applyStyle( "focusedThumbBorderColor: #fff" );
+		ui.applyStyle( "hoverThumbColor: #fff" );
+		ui.applyStyle( "pressedThumbColor: #fff" );
+		ui.applyStyle( "disabledTrackColor: #fff" );
+		ui.applyStyle( "disabledThumbColor: #fff" );
+		ui.applyStyle( "disabledThumbBorderColor: #fff" );
+		ui.applyStyle( "tickColor: #fff" );
+	}
+}