day24: why slope&shift work, while points dont?

day24/lines_test.go

@@ -19,6 +19,19 @@ func TestReadLine(t *testing.T) {
 
 }
 
+func TestReadLineInput(t *testing.T) {
+	lines := `147847636573416, 190826994408605, 140130741291716 @ 185, 49, 219
+287509258905812, 207449079739538, 280539021150559 @ -26, 31, 8
+390970075767404, 535711685410735, 404166182422876 @ -147, -453, -149
+306391780523937, 382508967958270, 264612201472049 @ -24, -274, 28
+278063616684570, 510959526404728, 288141792965603 @ -18, -441, -6`
+	for _, line := range strings.Split(lines, "\n") {
+		hail := ReadHailLine(line)
+		t.Logf("%+v\n", hail)
+	}
+
+}
+
 func TestSecondPointIsInFuture(t *testing.T) {
 	lines := `19, 13, 30 @ -2,  1, -2
 18, 19, 22 @ -1, -1, -2