Start adding support for lock files.

utils/tests/pub/lock_file_test.dart

Index: utils/tests/pub/lock_file_test.dart
diff --git a/utils/tests/pub/lock_file_test.dart b/utils/tests/pub/lock_file_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..5cb978573e86b798b2295ea2ced7a7af77d208aa
--- /dev/null
+++ b/utils/tests/pub/lock_file_test.dart
@@ -0,0 +1,171 @@
+// Copyright (c) 2012, 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.
+
+#library('lock_file_test');
+
+#import('../../../lib/unittest/unittest.dart');
+#import('../../pub/lock_file.dart');
+#import('../../pub/package.dart');
+#import('../../pub/source.dart');
+#import('../../pub/source_registry.dart');
+#import('../../pub/utils.dart');
+#import('../../pub/version.dart');
+
+class MockSource extends Source {
+  final String name = 'mock';
+  final bool shouldCache = false;
+
+  void validateDescription(String description) => description.endsWith(' desc');
+
+  String packageName(PackageId id) {
+    // Strip off ' desc'.
+    return id.description.substring(0, id.description.length - 5);
+  }
+}
+
+main() {
+  var sources = new SourceRegistry();
+  var mockSource = new MockSource();
+  sources.register(mockSource);
+
+  group('LockFile', () {
+    group('parse()', () {
+      test('returns an empty lockfile if the contents are empty', () {
+        var lockFile = new LockFile.parse('', sources);
+        expect(lockFile.packages.length).equals(0);
+      });
+
+      test('returns an empty lockfile if the contents are whitespace', () {
+        var lockFile = new LockFile.parse('  \t\n  ', sources);
+        expect(lockFile.packages.length).equals(0);
+      });
+
+      test('parses a series of package descriptions', () {
+        var lockFile = new LockFile.parse('''
+packages:
+  bar:
+    version: 1.2.3
+    source: mock
+    description: bar desc
+  foo:
+    version: 2.3.4
+    source: mock
+    description: foo desc
+''', sources);
+
+        expect(lockFile.packages.length).equals(2);
+
+        var bar = lockFile.packages['bar'];
+        expect(bar.name).equals('bar');
+        expect(bar.version).equals(new Version(1, 2, 3));
+        expect(bar.source).equals(mockSource);
+        expect(bar.description).equals('bar desc');
+
+        var foo = lockFile.packages['foo'];
+        expect(foo.name).equals('foo');
+        expect(foo.version).equals(new Version(2, 3, 4));
+        expect(foo.source).equals(mockSource);
+        expect(foo.description).equals('foo desc');
+      });
+
+      test("throws if the version is missing", () {
+        throwsBadFormat(() {
+          new LockFile.parse('''
+packages:
+  foo:
+    source: mock
+    description: foo desc
+''', sources);
+        });
+      });
+
+      test("throws if the version is invalid", () {
+        throwsBadFormat(() {
+          new LockFile.parse('''
+packages:
+  foo:
+    version: vorpal
+    source: mock
+    description: foo desc
+''', sources);
+        });
+      });
+
+      test("throws if the source is missing", () {
+        throwsBadFormat(() {
+          new LockFile.parse('''
+packages:
+  foo:
+    version: 1.2.3
+    description: foo desc
+''', sources);
+        });
+      });
+
+      test("throws if the source is unknown", () {
+        throwsBadFormat(() {
+          new LockFile.parse('''
+packages:
+  foo:
+    version: 1.2.3
+    source: notreal
+    description: foo desc
+''', sources);
+        });
+      });
+
+      test("throws if the description is missing", () {
+        throwsBadFormat(() {
+          new LockFile.parse('''
+packages:
+  foo:
+    version: 1.2.3
+    source: mock
+''', sources);
+        });
+      });
+
+      test("throws if the description is invalid", () {
+        throwsBadFormat(() {
+          new LockFile.parse('''
+packages:
+  foo:
+    version: 1.2.3
+    source: mock
+    description: foo desc is bad
+''', sources);
+        });
+      });
+
+      test("throws if the source name doesn't match the given name", () {
+        throwsBadFormat(() {
+          new LockFile.parse('''
+packages:
+  foo:
+    version: 1.2.3
+    source: mock
+    description: notfoo desc
+''', sources);
+        });
+      });
+
+      test("ignores extra stuff in file", () {
+        var lockFile = new LockFile.parse('''
+extra:
+  some: stuff
+packages:
+  foo:
+    bonus: not used
+    version: 1.2.3
+    source: mock
+    description: foo desc
+''', sources);
+      });
+    });
+  });
+}
+
+throwsBadFormat(function) {
+  expectThrow(function, (e) => e is FormatException);
+}