@Test
public void parseMatrixVariablesString() {
MultiValueMap<String, String> variables;
variables = WebUtils.parseMatrixVariables(null);
assertEquals(0, variables.size());
variables = WebUtils.parseMatrixVariables("year");
assertEquals(1, variables.size());
assertEquals("", variables.getFirst("year"));
variables = WebUtils.parseMatrixVariables("year=2012");
assertEquals(1, variables.size());
assertEquals("2012", variables.getFirst("year"));
variables = WebUtils.parseMatrixVariables("year=2012;colors=red,blue,green");
assertEquals(2, variables.size());
assertEquals(Arrays.asList("red", "blue", "green"), variables.get("colors"));
assertEquals("2012", variables.getFirst("year"));
variables = WebUtils.parseMatrixVariables(";year=2012;colors=red,blue,green;");
assertEquals(2, variables.size());
assertEquals(Arrays.asList("red", "blue", "green"), variables.get("colors"));
assertEquals("2012", variables.getFirst("year"));
variables = WebUtils.parseMatrixVariables("colors=red;colors=blue;colors=green");
assertEquals(1, variables.size());
assertEquals(Arrays.asList("red", "blue", "green"), variables.get("colors"));
}
