tests: split vlib/v/tests/ into several subfolders, to mitigate github limits for number of files in a folder (#22158)

.github/workflows/linux_ci.yml

@@ -176,7 +176,7 @@ jobs:
       - name: Build blog tutorial with -autofree
         run: v -autofree -o blog tutorials/building_a_simple_web_blog_with_vweb/code/blog
       - name: Build option_test.c.v with -autofree
-        run: v -autofree vlib/v/tests/option_test.c.v
+        run: v -autofree vlib/v/tests/options/option_test.c.v
       - name: V self compilation with -parallel-cc
         run: |
           v -o v2 -parallel-cc cmd/v

.github/workflows/windows_ci.yml

@@ -62,7 +62,7 @@ jobs:
       # - name: Test
       #   run: v test-all
       - name: Build option_test.c.v with -autofree
-        run: v -autofree vlib/v/tests/option_test.c.v
+        run: v -autofree vlib/v/tests/options/option_test.c.v
       - name: Test v->js
         run: v -o hi.js examples/hello_v_js.v && node hi.js
       - name: Test v binaries

cmd/tools/modules/testing/common.v

@@ -225,7 +225,7 @@ pub fn new_test_session(_vargs string, will_compile bool) TestSession {
 		skip_files << 'examples/coroutines/simple_coroutines.v'
 		skip_files << 'examples/coroutines/coroutines_bench.v'
 		$if msvc {
-			skip_files << 'vlib/v/tests/const_comptime_eval_before_vinit_test.v' // _constructor used
+			skip_files << 'vlib/v/tests/consts/const_comptime_eval_before_vinit_test.v' // _constructor used
 			skip_files << 'vlib/v/tests/project_with_cpp_code/compiling_cpp_files_with_a_cplusplus_compiler_test.c.v'
 		}
 		$if solaris {

cmd/tools/vtest-self.v

@@ -186,7 +186,7 @@ const skip_with_fsanitize_memory = [
 	'vlib/net/websocket/websocket_test.v',
 	'vlib/net/smtp/smtp_test.v',
 	'vlib/v/tests/websocket_logger_interface_should_compile_test.v',
-	'vlib/v/tests/fn_literal_type_test.v',
+	'vlib/v/tests/fns/fn_literal_type_test.v',
 	'vlib/x/sessions/tests/db_store_test.v',
 ]
 const skip_with_fsanitize_address = [
@@ -280,7 +280,7 @@ const skip_on_ubuntu_musl = [
 	'vlib/builtin/js/array_test.js.v',
 	'vlib/net/smtp/smtp_test.v',
 	'vlib/v/tests/websocket_logger_interface_should_compile_test.v',
-	'vlib/v/tests/fn_literal_type_test.v',
+	'vlib/v/tests/fns/fn_literal_type_test.v',
 	'vlib/x/sessions/tests/db_store_test.v',
 	'vlib/x/vweb/tests/vweb_test.v',
 	'vlib/x/vweb/tests/vweb_app_test.v',
@@ -294,10 +294,10 @@ const skip_on_non_linux = [
 ]
 const skip_on_windows_msvc = [
 	'do_not_remove',
-	'vlib/v/tests/const_fixed_array_containing_references_to_itself_test.v', // error C2099: initializer is not a constant
-	'vlib/v/tests/const_and_global_with_same_name_test.v', // error C2099: initializer is not a constant
-	'vlib/v/tests/sumtype_as_cast_1_test.v', // error: cannot support compound statement expression ({expr; expr; expr;})
-	'vlib/v/tests/sumtype_as_cast_2_test.v', // error: cannot support compound statement expression ({expr; expr; expr;})
+	'vlib/v/tests/consts/const_fixed_array_containing_references_to_itself_test.v', // error C2099: initializer is not a constant
+	'vlib/v/tests/consts/const_and_global_with_same_name_test.v', // error C2099: initializer is not a constant
+	'vlib/v/tests/sumtypes/sumtype_as_cast_1_test.v', // error: cannot support compound statement expression ({expr; expr; expr;})
+	'vlib/v/tests/sumtypes/sumtype_as_cast_2_test.v', // error: cannot support compound statement expression ({expr; expr; expr;})
 	'vlib/v/tests/project_with_cpp_code/compiling_cpp_files_with_a_cplusplus_compiler_test.c.v', // TODO
 ]
 const skip_on_windows = [
@@ -317,7 +317,7 @@ const skip_on_windows = [
 	'vlib/sync/many_times_test.v',
 	'vlib/sync/once_test.v',
 	'vlib/v/tests/websocket_logger_interface_should_compile_test.v',
-	'vlib/v/tests/fn_literal_type_test.v',
+	'vlib/v/tests/fns/fn_literal_type_test.v',
 ]
 const skip_on_non_windows = [
 	'do_not_remove',
@@ -337,7 +337,7 @@ const skip_on_arm64 = [
 const skip_on_non_amd64_or_arm64 = [
 	'do_not_remove',
 	// closures aren't implemented yet:
-	'vlib/v/tests/closure_test.v',
+	'vlib/v/tests/fns/closure_test.v',
 	// native aren't implemented:
 	'vlib/v/gen/native/tests/native_test.v',
 	'vlib/context/cancel_test.v',

vlib/v/tests/aliases/modules/geometry/geometry.v

@@ -0,0 +1,48 @@
+module geometry
+
+const module_name = 'geometry'
+
+pub enum Shape {
+	circle
+	rectangle
+	triangle
+}
+
+pub type ShapeMap = map[Shape]string
+
+// used by vlib/v/tests/map_enum_keys_test.v
+pub enum Form3D {
+	sphere
+	cylinder
+	cone
+	cube
+	invalid
+}
+
+pub struct Point {
+pub mut:
+	x int
+	y int
+}
+
+pub struct Line {
+pub mut:
+	ps []Point
+}
+
+pub fn (a Point) + (b Point) Point {
+	return Point{
+		x: a.x + b.x
+		y: a.y + b.y
+	}
+}
+
+pub fn (a Point) str() string {
+	return '${a.x} ${a.y}'
+}
+
+pub fn point_str(a Point) string {
+	return a.str()
+}
+
+pub type PointCond = fn (p Point) bool