JUnit 5

Parameterised Tests

  • Some examples from Excel library,

    static List<ExcelWriter> getTestWorkbookWriters() {
        val streaming = testWriter().isStreaming(true).build();
        val nonStreaming = testWriter().isStreaming(false).build();
        return Arrays.asList(streaming, nonStreaming);
    void testSimpleWritesOfOscars(ExcelWriter writer) {
        val sheetWriter = writer.getRowDataWriter("Oscars");
        sheetWriter.writeRow(Arrays.asList("Name", "Year", "Movie"));
        sheetWriter.writeRow(Arrays.asList("Warner Baxter", 1929, "In Old Arizona"));
        ExcelSheetWriter sw = (ExcelSheetWriter) sheetWriter;
        val sheet = sw.getSheet();
        assertEquals(5, sheet.getLastRowNum() + 1); // number of rows = last row num (zero based) + 1
  • TODO: To test exceptions

JUnit parameterised tests still feel quite constrained compared to flexible ScalaTest etc. Thus for a big Java project, it might be worth looking at Groovy based Spock framework for testing.

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