75     S1Interval empty = S1Interval.empty();  in testBasic()  local
76     assertTrue(empty.isValid() && empty.isEmpty() && !empty.isFull());  in testBasic()
77     assertTrue(empty.isInverted());  in testBasic()
100     assertTrue(empty.getLength() < 0);  in testBasic()
104     assertTrue(empty.complement().isFull());  in testBasic()
116     assertTrue(!empty.contains(0) && !empty.contains(S2.M_PI) && !empty.contains(-S2.M_PI));  in testBasic()
117     assertTrue(!empty.interiorContains(S2.M_PI) && !empty.interiorContains(-S2.M_PI));  in testBasic()
142     testIntervalOps(empty, empty, "TTFF", empty, empty);  in testBasic()
143     testIntervalOps(empty, full, "FFFF", full, empty);  in testBasic()
144     testIntervalOps(empty, zero, "FFFF", zero, empty);  in testBasic()
145     testIntervalOps(empty, pi, "FFFF", pi, empty);  in testBasic()
146     testIntervalOps(empty, mipi, "FFFF", mipi, empty);  in testBasic()
148     testIntervalOps(full, empty, "TTFF", full, empty);  in testBasic()
156     testIntervalOps(zero, empty, "TTFF", zero, empty);  in testBasic()
159     testIntervalOps(zero, pi, "FFFF", new S1Interval(0, S2.M_PI), empty);  in testBasic()
160     testIntervalOps(zero, pi2, "FFFF", quad1, empty);  in testBasic()
161     testIntervalOps(zero, mipi, "FFFF", quad12, empty);  in testBasic()
162     testIntervalOps(zero, mipi2, "FFFF", quad4, empty);  in testBasic()
164     testIntervalOps(zero, quad23, "FFFF", quad123, empty);  in testBasic()
166     testIntervalOps(pi2, empty, "TTFF", pi2, empty);  in testBasic()
168     testIntervalOps(pi2, zero, "FFFF", quad1, empty);  in testBasic()
169     testIntervalOps(pi2, pi, "FFFF", new S1Interval(S2.M_PI_2, S2.M_PI), empty);  in testBasic()
171     testIntervalOps(pi2, mipi, "FFFF", quad2, empty);  in testBasic()
172     testIntervalOps(pi2, mipi2, "FFFF", quad23, empty);  in testBasic()
176     testIntervalOps(pi, empty, "TTFF", pi, empty);  in testBasic()
178     testIntervalOps(pi, zero, "FFFF", new S1Interval(S2.M_PI, 0), empty);  in testBasic()
180     testIntervalOps(pi, pi2, "FFFF", new S1Interval(S2.M_PI_2, S2.M_PI), empty);  in testBasic()
182     testIntervalOps(pi, mipi2, "FFFF", quad3, empty);  in testBasic()
186     testIntervalOps(mipi, empty, "TTFF", mipi, empty);  in testBasic()
188     testIntervalOps(mipi, zero, "FFFF", quad34, empty);  in testBasic()
190     testIntervalOps(mipi, pi2, "FFFF", quad2, empty);  in testBasic()
192     testIntervalOps(mipi, mipi2, "FFFF", new S1Interval(-S2.M_PI, -S2.M_PI_2), empty);  in testBasic()
196     testIntervalOps(quad12, empty, "TTFF", quad12, empty);  in testBasic()
205     testIntervalOps(quad23, empty, "TTFF", quad23, empty);  in testBasic()
207     testIntervalOps(quad23, zero, "FFFF", quad234, empty);  in testBasic()
236     testIntervalOps(quad12, mid34, "FFFF", quad123eps, empty);  in testBasic()
237     testIntervalOps(mid34, quad12, "FFFF", quad123eps, empty);  in testBasic()
252     testIntervalOps(quad23, mid41, "FFFF", quadeps123, empty);  in testBasic()
253     testIntervalOps(mid41, quad23, "FFFF", quadeps123, empty);  in testBasic()
256     S1Interval r = S1Interval.empty();  in testBasic()
304     assertEquals(empty.expanded(1), empty);  in testBasic()
314     assertTrue(empty.approxEquals(empty));  in testBasic()
315     assertTrue(zero.approxEquals(empty) && empty.approxEquals(zero));  in testBasic()
316     assertTrue(pi.approxEquals(empty) && empty.approxEquals(pi));  in testBasic()
317     assertTrue(mipi.approxEquals(empty) && empty.approxEquals(mipi));  in testBasic()