Minor doc and test update

Author: gpeairs

docs/src/routes.md

@@ -60,7 +60,7 @@ A `Route` supports endpoint inspection much like a `Path` does:
 
 ### Channel routing
 
-`RouteChannels` offer a way to run routes in parallel, with routes joining or leaving a channel at different points. Using `SingleChannelRouting`, we can set the "track" (a path offset from the channel centerline) for each route through the channel, as well as some rules for joining and leaving the channel from route start and end points. Here's a basic example with a straight channel:
+`RouteChannels` offer a way to run routes in parallel, with routes joining or leaving a channel at different points. Using [`Paths.SingleChannelRouting`](@ref), we can set the "track" (a curve offset from the channel centerline) for each route to follow through the channel, as well as some rules for joining and leaving the channel from route start and end points. Here's a basic example with a straight channel:
 
 ```@example 1
 using DeviceLayout, .PreferredUnits, FileIO

test/test_channels.jl

@@ -127,7 +127,7 @@ function test_schematic_single_channel()
         rule,
         spacer1 => :p1_west,
         spacer2 => :p1_east,
-        Paths.SimpleTrace(1μm),
+        Paths.CPW(1μm, 1μm),
         GDSMeta()
     )
     r2 = route!(
@@ -144,6 +144,8 @@ function test_schematic_single_channel()
     # Track assignment means pa1 track is 100um below pa2 track
     @test pathlength(pa1) ≈ 2 * (450μm + pi * 50μm + 0.4mm) + 1mm atol = 1nm
     @test pathlength(pa2) ≈ 2 * (350μm + pi * 50μm + 0.4mm) + 1mm atol = 1nm
+    c = Cell("test", nm)
+    return render!(c, pa1, GDSMeta()) # No error
 end
 
 @testset "Channels" begin
@@ -183,8 +185,6 @@ end
     )
     Paths.set_track!(rule, pa2, 1)
     route!(pa2, Point(0.1mm, 0.1mm), 0, rule, Paths.CPW(2nm, 2nm))
-    c = Cell("test", nm)
-    render!(c, pa2, GDSMeta()) # No error
     @test length(pa2) == 1 # Channel segment turned into waypoint
 
     ## Schematic-level routing

test/test_routes.jl

@@ -118,14 +118,7 @@
     @test α1(pa) == α_end
 
     # Use StraightAnd45 with incompatible waypoints
-    r4 = Route(
-        Paths.StraightAnd45(min_bend_radius=20, max_bend_radius=20),
-        p_start,
-        p_end,
-        α_start,
-        α_end,
-        waypoints=waypoints
-    )
+    r4 = Route(Paths.StraightAnd45(20), p_start, p_end, α_start, α_end, waypoints=waypoints)
     @test_throws ErrorException (pa = Path(r4, sty))
 
     # Use StraightAnd45