#413 Add tests for FontMetrics

test/ca/mcgill/cs/jetuml/views/TestFontMetrics.java

@@ -0,0 +1,54 @@
+package ca.mcgill.cs.jetuml.views;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+
+import java.util.stream.Stream;
+
+import static ca.mcgill.cs.jetuml.views.StringViewer.FONT;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import ca.mcgill.cs.jetuml.geom.Dimension;
+
+public class TestFontMetrics {
+
+	private static final FontMetrics aMetrics = new FontMetrics(FONT);
+	// Ensures there is no caching of sorts when reusing the same Text object
+	@ParameterizedTest
+	@MethodSource("stringPairParameters")
+	public void testStateNotPreserved(String firstString, String secondString)
+	{
+
+		assertNotEquals(aMetrics.getDimension(firstString), aMetrics.getDimension(secondString));
+	}
+
+	private static Stream<Arguments> stringPairParameters() {
+	    return Stream.of(
+	            Arguments.of("X", "XX"),
+	            Arguments.of("XX", "XXX"),
+	            Arguments.of("XXX", "XXXX"),
+	            Arguments.of("XXXX", "XXXXX"),
+	            Arguments.of("XXXXX", "XXXXXX")
+	    );
+	}
+
+	@Test
+	public void testGetDimensions()
+	{
+		assertEquals(new Dimension(0, 11), aMetrics.getDimension(""));
+		assertEquals(new Dimension(92, 11), aMetrics.getDimension("Single-Line-String"));
+		assertEquals(new Dimension(29, 39), aMetrics.getDimension("Multi\nLine\nString"));
+	}
+
+	@Test
+	public void testGetLogicalHeight()
+	{
+		assertEquals(14, aMetrics.getLogicalHeight(""));
+		assertEquals(14, aMetrics.getLogicalHeight("Single-Line-String"));
+		assertEquals(42, aMetrics.getLogicalHeight("Multi\nLine\nString"));
+	}
+}