Klasse FileLoader um Textdateien zu laden

src/test/java/schule/ngb/zm/util/FileLoaderTest.java

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+package schule.ngb.zm.util;
+
+import org.junit.jupiter.api.Test;
+
+import java.nio.charset.StandardCharsets;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class FileLoaderTest {
+
+	@Test
+	void loadLines() {
+		String[] data;
+		List<String> lines;
+
+		data = new String[]{
+			"Header1,Header2,Header3",
+			"1.1,1.2,1.3",
+			"2.1,2.2,2.3",
+			"3.1,3.2,3.3"
+		};
+
+		lines = FileLoader.loadLines("data_comma.csv");
+		assertEquals(data.length, lines.size());
+		for( int i = 0; i < lines.size(); i++ ) {
+			assertEquals(data[i], lines.get(i));
+		}
+
+		data = new String[]{
+			"Nöme;Häder2;Straße",
+			"1.1;1.2;1.3",
+			"2.1;2.2;2.3",
+			"3.1;3.2;3.3"
+		};
+
+		lines = FileLoader.loadLines("data_semicolon_latin.csv", FileLoader.ISO_8859_1);
+		assertEquals(data.length, lines.size());
+		for( int i = 0; i < lines.size(); i++ ) {
+			assertEquals(data[i], lines.get(i));
+		}
+	}
+
+	@Test
+	void loadText() {
+		String data;
+		String text;
+
+		data = "Header1,Header2,Header3\n" +
+			"1.1,1.2,1.3\n" +
+			"2.1,2.2,2.3\n" +
+			"3.1,3.2,3.3\n";
+		text = FileLoader.loadText("data_comma.csv");
+		assertEquals(data, text);
+
+		data = "Nöme;Häder2;Straße\n" +
+			"1.1;1.2;1.3\n" +
+			"2.1;2.2;2.3\n" +
+			"3.1;3.2;3.3\n";
+		text = FileLoader.loadText("data_semicolon_latin.csv", FileLoader.ISO_8859_1);
+		assertEquals(data, text);
+	}
+
+	@Test
+	void loadCsv() {
+		double[][] data;
+		double[][] csv;
+
+		data = new double[][]{
+			{1.1,1.2,1.3},
+			{2.1,2.2,2.3},
+			{3.1,3.2,3.3}
+		};
+		csv = FileLoader.loadDoubles("data_comma.csv", ',', true);
+		assertArrayEquals(data, csv);
+
+		csv = FileLoader.loadDoubles("data_semicolon_latin.csv", ';', true, FileLoader.ISO_8859_1);
+		assertArrayEquals(data, csv);
+	}
+
+}

src/test/resources/data_comma.csv

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+Header1,Header2,Header3
+1.1,1.2,1.3
+2.1,2.2,2.3
+3.1,3.2,3.3

src/test/resources/data_semicolon.csv

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+Header1;Header2;Header3
+1.1;1.2;1.3
+2.1;2.2;2.3
+3.1;3.2;3.3

src/test/resources/data_semicolon_latin.csv

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+Nöme;Häder2;Straße
+1.1;1.2;1.3
+2.1;2.2;2.3
+3.1;3.2;3.3