Hook up dependency overrides to the rest of pub.

sdk/lib/_internal/pub/test/dependency_override_test.dart

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'descriptor.dart' as d;
+import 'test_pub.dart';
+
+main() {
+  initConfig();
+  forBothPubGetAndUpgrade((command) {
+    integration("chooses best version matching override constraint", () {
+      servePackages([
+        packageMap("foo", "1.0.0"),
+        packageMap("foo", "2.0.0"),
+        packageMap("foo", "3.0.0")
+      ]);
+
+      d.dir(appPath, [
+        d.pubspec({
+          "name": "myapp",
+          "dependencies": {
+            "foo": ">2.0.0"
+          },
+          "dependency_overrides": {
+            "foo": "<3.0.0"
+          }
+        })
+      ]).create();
+
+      pubCommand(command);
+
+      d.packagesDir({
+        "foo": "2.0.0"
+      }).validate();
+    });
+
+    integration("treats override as implicit dependency", () {
+      servePackages([
+        packageMap("foo", "1.0.0")
+      ]);
+
+      d.dir(appPath, [
+        d.pubspec({
+          "name": "myapp",
+          "dependency_overrides": {
+            "foo": "any"
+          }
+        })
+      ]).create();
+
+      pubCommand(command);
+
+      d.packagesDir({
+        "foo": "1.0.0"
+      }).validate();
+    });
+
+    integration("ignores other constraints on overridden package", () {
+      servePackages([
+        packageMap("foo", "1.0.0"),
+        packageMap("foo", "2.0.0"),
+        packageMap("foo", "3.0.0"),
+        packageMap("bar", "1.0.0", {"foo": "5.0.0-nonexistent"})
+      ]);
+
+      d.dir(appPath, [
+        d.pubspec({
+          "name": "myapp",
+          "dependencies": {
+            "bar": "any"
+          },
+          "dependency_overrides": {
+            "foo": "<3.0.0"
+          }
+        })
+      ]).create();
+
+      pubCommand(command);
+
+      d.packagesDir({
+        "foo": "2.0.0",
+        "bar": "1.0.0"
+      }).validate();
+    });
+
+    integration("warns about overridden dependencies", () {
+      servePackages([
+        packageMap("foo", "1.0.0"),
+        packageMap("bar", "1.0.0"),
+        packageMap("baz", "1.0.0")
+      ]);
+
+      d.dir(appPath, [
+        d.pubspec({
+          "name": "myapp",
+          "dependency_overrides": {
+            "foo": "any",
+            "bar": "any",
+            "baz": "any"
+          }
+        })
+      ]).create();
+
+      schedulePub(args: [command.name], output: command.success, error:
+          """
+          Warning: You are overriding these dependencies:
+          - bar any from hosted (bar)
+          - baz any from hosted (baz)
+          - foo any from hosted (foo)
+          """);
+    });
+  });
+}