Add JuliaLowering to TESTNAMES / make test

The environment when running under Distributed is slightly different
than running via `Pkg.test()` so this required some tweaks to error
printing, etc.

Author: topolarity

JuliaLowering/test/runtests_vendored.jl

@@ -0,0 +1,25 @@
+old_active_project = Base.active_project()
+try
+    # test local (dev) copy of JuliaLowering, not yet vendored into Base
+    Base.set_active_project(joinpath(@__DIR__, "..", "Project.toml"))
+    manifest_path = joinpath(@__DIR__, "..", "Manifest.toml")
+    isfile(manifest_path) && rm(manifest_path)
+
+    # activate and instantiate JuliaSyntax as a local package (rather than using
+    # Base.JuliaSyntax)
+    import Pkg
+    Pkg.instantiate()
+
+    # restore error hints (emptied by `testdefs.jl`) so that errors print as
+    # JuliaLowering expects them to
+    Base.Experimental.register_error_hint(Base.UndefVarError_hint, UndefVarError)
+
+    # n.b.: these must be run in `Main`, so that type-printing is equivalent
+    # when running via Pkg.test() (e.g. "SyntaxGraph" should be printed instead
+    # of "JuliaLowering.SyntaxGraph")
+    @eval Main using JuliaLowering
+    Core.include(Main, joinpath(@__DIR__, "runtests.jl")) # run the actual tests
+finally
+    # Restore original load path and active project
+    Base.set_active_project(old_active_project)
+end

test/Makefile

@@ -11,7 +11,7 @@ export JULIA_LOAD_PATH := @$(PATHSEP)@stdlib
 unexport JULIA_PROJECT :=
 unexport JULIA_BINDIR :=
 
-TESTGROUPS = unicode strings compiler Compiler JuliaSyntax
+TESTGROUPS = unicode strings compiler Compiler JuliaSyntax JuliaLowering
 TESTS = all default stdlib $(TESTGROUPS) \
 		$(patsubst $(STDLIBDIR)/%/,%,$(dir $(wildcard $(STDLIBDIR)/*/.))) \
 		$(filter-out runtests testdefs relocatedepot, \

test/choosetests.jl

@@ -31,7 +31,7 @@ const TESTNAMES = [
         "smallarrayshrink", "opaque_closure", "filesystem", "download",
         "scopedvalues", "compileall", "rebinding",
         "faulty_constructor_method_should_not_cause_stack_overflows",
-        "JuliaSyntax"
+        "JuliaSyntax", "JuliaLowering",
 ]
 
 const INTERNET_REQUIRED_LIST = [
@@ -48,9 +48,9 @@ const INTERNET_REQUIRED_LIST = [
 const NETWORK_REQUIRED_LIST = vcat(INTERNET_REQUIRED_LIST, ["Sockets"])
 
 const TOP_LEVEL_PKGS = [
-    "Compiler"
-    "JuliaSyntax"
-    "JuliaLowering"
+    "Compiler",
+    "JuliaSyntax",
+    "JuliaLowering",
 ]
 
 function test_path(test)
@@ -71,6 +71,9 @@ function test_path(test)
     elseif t[1] == "JuliaSyntax"
         testpath = length(t) >= 2 ? t[2:end] : ("runtests_vendored",)
         return joinpath(@__DIR__, "..", t[1], "test", testpath...)
+    elseif t[1] == "JuliaLowering"
+        testpath = length(t) >= 2 ? t[2:end] : ("runtests_vendored",)
+        return joinpath(@__DIR__, "..", t[1], "test", testpath...)
     else
         return joinpath(@__DIR__, test)
     end