Auto merge of #13335 - Manishearth:stylo-tests, r=emilio

Add unit test crate for stylo

@canaltinova needs this for his mask work -- we need a way to test stylo code (or style code that's conditionally compiled out for gecko)

We can add this to the CI as well.

r? @emilio

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ports/geckolib/Cargo.lock

@@ -14,6 +14,7 @@ dependencies = [
  "selectors 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "style_traits 0.0.1",
+ "stylo_tests 0.0.1",
  "url 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -52,6 +53,7 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "encoding 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "matches 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -393,6 +395,17 @@ dependencies = [
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "stylo_tests"
+version = "0.0.1"
+dependencies = [
+ "app_units 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cssparser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gecko_bindings 0.0.1",
+ "style 0.0.1",
+ "style_traits 0.0.1",
+]
+
 [[package]]
 name = "thread-id"
 version = "2.0.0"

ports/geckolib/Cargo.toml

@@ -23,3 +23,6 @@ selectors = "0.13"
 style = {path = "../../components/style", features = ["gecko"]}
 style_traits = {path = "../../components/style_traits"}
 url = "1.2"
+
+[dev-dependencies]
+stylo_tests = {path = "../../tests/unit/stylo"}

ports/geckolib/lib.rs

@@ -22,7 +22,6 @@ mod snapshot;
 mod snapshot_helpers;
 #[allow(non_snake_case)]
 pub mod glue;
-mod sanity_checks;
 mod traversal;
 mod wrapper;
 

python/servo/testing_commands.py

@@ -25,7 +25,7 @@ from mach.decorators import (
     Command,
 )
 
-from servo.command_base import CommandBase, call, check_call, host_triple
+from servo.command_base import CommandBase, call, cd, check_call, host_triple
 from wptrunner import wptcommandline
 from update import updatecommandline
 from servo_tidy import tidy
@@ -208,6 +208,8 @@ class MachCommands(CommandBase):
         if not packages:
             packages = set(os.listdir(path.join(self.context.topdir, "tests", "unit")))
 
+        packages.remove('stylo')
+
         args = ["cargo", "test"]
         for crate in packages:
             args += ["-p", "%s_tests" % crate]
@@ -232,6 +234,23 @@ class MachCommands(CommandBase):
         if result != 0:
             return result
 
+    @Command('test-stylo',
+             description='Run stylo unit tests',
+             category='testing')
+    def test_stylo(self):
+        self.set_use_stable_rust()
+        self.ensure_bootstrapped()
+
+        env = self.build_env()
+        env["RUST_BACKTRACE"] = "1"
+        env["CARGO_TARGET_DIR"] = path.join(self.context.topdir, "target", "geckolib").encode("UTF-8")
+
+        with cd(path.join("ports", "geckolib")):
+            result = call(["cargo", "test", "-p", "stylo_tests"], env=env)
+
+        if result != 0:
+            return result
+
     @Command('test-compiletest',
              description='Run compiletests',
              category='testing')

tests/unit/stylo/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "stylo_tests"
+version = "0.0.1"
+authors = ["The Servo Project Developers"]
+license = "MPL-2.0"
+
+[lib]
+name = "stylo_tests"
+path = "lib.rs"
+doctest = false
+
+[dependencies]
+app_units = "0.3"
+cssparser = {version = "0.7", features = ["heap_size"]}
+gecko_bindings = {path = "../../../ports/geckolib/gecko_bindings"}
+style = {path = "../../../components/style", features = ["gecko"]}
+style_traits = {path = "../../../components/style_traits"}

tests/unit/stylo/lib.rs

@@ -0,0 +1,11 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+extern crate app_units;
+extern crate cssparser;
+extern crate gecko_bindings;
+extern crate style;
+extern crate style_traits;
+
+mod sanity_checks;

tests/unit/stylo/sanity_checks.rs

@@ -62,7 +62,7 @@ fn assert_basic_pseudo_elements() {
         };
     }
 
-    include!("../../components/style/generated/gecko_pseudo_element_helper.rs");
+    include!("../../../components/style/generated/gecko_pseudo_element_helper.rs");
 
     assert!(saw_before);
     assert!(saw_after);