skip some tests in CI if using system python

Author: Christopher Doris

test/Compat.jl

@@ -1,4 +1,4 @@
-@testitem "gui" begin
+@testitem "gui" setup=[Setup] begin
     @testset "fix_qt_plugin_path" begin
         @test PythonCall.fix_qt_plugin_path() isa Bool
         # second time is a no-op
@@ -7,7 +7,7 @@
     @testset "event_loop_on/off" begin
         @testset "$g" for g in [:pyqt4, :pyqt5, :pyside, :pyside2, :pyside6, :gtk, :gtk3, :wx]
             # TODO: actually test the various GUIs somehow?
-            if g == :pyside6
+            if Setup.devdeps && g == :pyside6
                 # pyside6 is installed as a dev dependency
                 # AND it's a dependency of matplotlib, which is also a dev dependency
                 @test PythonCall.event_loop_on(g) isa Timer
@@ -18,8 +18,10 @@
         end
     end
     @testset "matplotlib issue 676" begin
-        plt = pyimport("matplotlib.pyplot")
-        @test plt.get_backend() isa Py
+        if Setup.devdeps
+            plt = pyimport("matplotlib.pyplot")
+            @test plt.get_backend() isa Py
+        end
     end
 end
 

test/runtests.jl

@@ -1,3 +1,10 @@
 using TestItemRunner
 
+@testmodule Setup begin
+    # test if we are in CI
+    ci = get(ENV, "CI", "") == "true"
+    # test if we have all dev conda deps (assume true if not in CI)
+    devdeps = ci ? ENV["JULIA_PYTHONCALL_EXE"] == "@CondaPkg" : true
+end
+
 @run_package_tests