Add tests for passNim feature.

tests/passNimFlags/passNimFlags.nim

@@ -0,0 +1 @@
+when not defined(passNimIsWorking): {.error: "-d:passNimIsWorking wasn't passed to the compiler"}

tests/passNimFlags/passNimFlags.nimble

@@ -0,0 +1,11 @@
+# Package
+
+version       = "0.1.0"
+author        = "SolitudeSF"
+description   = "Test nimble install flag forwarding"
+license       = "BSD"
+bin           = @["passNimFlags"]
+
+# Dependencies
+
+requires "nim >= 0.13.0"

tests/tester.nim

@@ -840,3 +840,7 @@ test "remove skips packages with revDeps (#504)":
 
   check execNimble("path", "nimboost").exitCode != QuitSuccess
   check execNimble("path", "nimfp").exitCode != QuitSuccess
+
+test "pass options to the compiler with `nimble install`":
+  cd "passNimFlags":
+    check execNimble("install", "--passNim:-d:passNimIsWorking").exitCode == QuitSuccess