test: is_wsl

Author: scivision

+stdlib/is_wsl.m

@@ -20,8 +20,6 @@
   end
 end
 
-w = int32(w);
+mustBeInteger(w)
 
 end
-
-%!assert(class(is_wsl()), "int32")

test/TestSys.m

@@ -3,7 +3,6 @@
 properties (TestParameter)
 fun = {stdlib.iscygwin, stdlib.isoctave, stdlib.isinteractive, stdlib.has_dotnet, ...
        stdlib.has_java, stdlib.has_python}
-fi32 = {stdlib.is_wsl}
 end
 
 
@@ -13,10 +12,6 @@ function test_platform_logical(tc, fun)
 tc.verifyClass(fun, 'logical')
 end
 
-function test_platform_int32(tc, fi32)
-tc.verifyClass(fi32, 'int32')
-end
-
 function test_is_rosetta(tc)
 if ismac()
   tc.verifyClass(stdlib.is_rosetta(), 'logical')
@@ -25,6 +20,14 @@ function test_is_rosetta(tc)
 end
 end
 
+function test_is_wsl(tc)
+if isunix() && ~ismac()
+  tc.verifyGreaterThanOrEqual(stdlib.is_wsl(), 0)
+else
+  tc.verifyEqual(stdlib.is_wsl(), 0)
+end
+end
+
 function test_dotnet_version(tc)
 tc.assumeTrue(stdlib.has_dotnet())
 v = stdlib.dotnet_version();