[core] Load source TileJSON immediately

This reverses #3095. Rationale:

* We're now exposing source attributes as a public API. Making those attributes unavailable at certain times complicates that API.
* We're preparing to split RenderSource out of Source. Removing this removes a point of coupling between the two.

4 files changed, 4 insertions, 76 deletions

diff --git a/test/fixtures/api/annotation.json b/test/fixtures/api/annotation.json
index ab83d43476..972b22fc4d 100644
--- a/test/fixtures/api/annotation.json
+++ b/test/fixtures/api/annotation.json
@@ -3,7 +3,7 @@
   "sources": {
     "fake": {
       "type": "vector",
-      "url": "fake"
+      "tiles": ["fake"]
     }
   },
   "layers": [{
diff --git a/test/fixtures/api/query_style.json b/test/fixtures/api/query_style.json
index 97f1d04432..2e499c383d 100644
--- a/test/fixtures/api/query_style.json
+++ b/test/fixtures/api/query_style.json
@@ -53,11 +53,11 @@
     },
     "source5": {
       "type": "vector",
-      "url": "mapbox://mapbox.mapbox-streets-v6"
+      "tiles": ["fake"]
     },
     "source6": {
       "type": "raster",
-      "url": "mapbox://mapbox.satellite",
+      "tiles": ["fake"],
       "tileSize": 256
     }
   },
diff --git a/test/fixtures/api/water.json b/test/fixtures/api/water.json
index 387471b842..0a563a4955 100644
--- a/test/fixtures/api/water.json
+++ b/test/fixtures/api/water.json
@@ -4,7 +4,7 @@
   "sources": {
     "mapbox": {
       "type": "vector",
-      "url": "asset://streets.json"
+      "tiles": ["asset://streets/{z}-{x}-{y}.vector.pbf"]
     }
   },
   "layers": [{
diff --git a/test/style/style.test.cpp b/test/style/style.test.cpp
index f87e31cce2..b529abad4a 100644
--- a/test/style/style.test.cpp
+++ b/test/style/style.test.cpp
@@ -14,78 +14,6 @@
 using namespace mbgl;
 using namespace mbgl::style;
 
-TEST(Style, UnusedSource) {
-    util::RunLoop loop;
-
-    ThreadPool threadPool{ 1 };
-    StubFileSource fileSource;
-    Style style { threadPool, fileSource, 1.0 };
-
-    auto now = Clock::now();
-
-    style.setJSON(util::read_file("test/fixtures/resources/style-unused-sources.json"));
-
-    // If we haven't calculated whether the source is used, we have to assume it is used.
-    EXPECT_FALSE(style.isLoaded());
-
-    style.cascade(now, MapMode::Still);
-    style.recalculate(0, now, MapMode::Still);
-
-    Source* usedSource = style.getSource("usedsource");
-    EXPECT_TRUE(usedSource);
-    EXPECT_TRUE(usedSource->baseImpl->isLoaded());
-
-    Source* unusedSource = style.getSource("unusedsource");
-    EXPECT_TRUE(unusedSource);
-    EXPECT_FALSE(unusedSource->baseImpl->isLoaded());
-
-    Layer* unusedLayer = style.getLayer("unusedlayervisibility");
-    EXPECT_TRUE(unusedLayer);
-
-    unusedLayer->setVisibility(mbgl::style::VisibilityType::Visible);
-
-    style.relayout();
-    EXPECT_FALSE(unusedSource->baseImpl->isLoaded());
-
-    // Style loads sources upon request when recalculating style.
-    style.recalculate(0, now, MapMode::Still);
-    EXPECT_TRUE(unusedSource->baseImpl->isLoaded());
-}
-
-TEST(Style, UnusedSourceActiveViaClassUpdate) {
-    util::RunLoop loop;
-
-    ThreadPool threadPool{ 1 };
-    StubFileSource fileSource;
-    Style style { threadPool, fileSource, 1.0 };
-
-    style.setJSON(util::read_file("test/fixtures/resources/style-unused-sources.json"));
-    EXPECT_TRUE(style.addClass("visible"));
-    EXPECT_TRUE(style.hasClass("visible"));
-
-    auto now = Clock::now();
-
-    style.cascade(now, MapMode::Still);
-    style.recalculate(0, now, MapMode::Still);
-
-    Source *unusedSource = style.getSource("unusedsource");
-    EXPECT_TRUE(unusedSource);
-    EXPECT_TRUE(unusedSource->baseImpl->isLoaded());
-
-    // Style classes should be cleared upon new style load.
-    style.setJSON(util::read_file("test/fixtures/resources/style-unused-sources.json"));
-    EXPECT_FALSE(style.hasClass("visible"));
-
-    now = Clock::now();
-
-    style.cascade(now, MapMode::Still);
-    style.recalculate(0, now, MapMode::Still);
-
-    unusedSource = style.getSource("unusedsource");
-    EXPECT_TRUE(unusedSource);
-    EXPECT_FALSE(unusedSource->baseImpl->isLoaded());
-}
-
 TEST(Style, Properties) {
     util::RunLoop loop;