Roll Observatory packages and add a roll script

packages/charted/test.disabled/svg/svg_arc_test.dart

+/*
+ * Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file or at
+ * https://developers.google.com/open-source/licenses/bsd
+ */
+
+part of charted.test.svg;
+
+testSvgArc() {
+
+  List mockSvgData = [
+    new SvgArcData(null, 0, 0,      0,      0,  100),  // Init sector
+    new SvgArcData(null, 0, 0,      0,      50, 100),  // Init donut
+    new SvgArcData(null, 0, 0,      2 * PI, 0,  100),  // Whole sector
+    new SvgArcData(null, 0, 0,      2 * PI, 50, 100),  // Whole donut
+    new SvgArcData(null, 0, 0,      PI / 3, 0,  100),  // Sector start angle 0
+    new SvgArcData(null, 0, 0,      PI / 3, 50, 100),  // Slice start angle 0
+    new SvgArcData(null, 0, PI / 3, PI,     0,  100),  // Sector start angle > 0
+    new SvgArcData(null, 0, PI / 3, PI,     50, 100),  // Slice start angle > 0
+  ];
+
+  test('interpolateSvgArcData() returns an InterpolateFn that '
+      'correctly interpolates two SvgArcData', () {
+    InterpolateFn arcInterpolator =
+        interpolateSvgArcData(mockSvgData[5], mockSvgData[6]);
+    for (var i = 0.0; i <= 1.0; i += 0.2) {
+      SvgArcData arcData = arcInterpolator(i);
+      expect(arcData.startAngle, closeTo(mockSvgData[5].startAngle * (1 - i) +
+          mockSvgData[6].startAngle * i, EPSILON));
+      expect(arcData.endAngle, closeTo(mockSvgData[5].endAngle * (1 - i) +
+          mockSvgData[6].endAngle * i, EPSILON));
+      expect(arcData.innerRadius, closeTo(mockSvgData[5].innerRadius * (1 - i) +
+          mockSvgData[6].innerRadius * i, EPSILON));
+      expect(arcData.outerRadius, closeTo(mockSvgData[5].outerRadius * (1 - i) +
+          mockSvgData[6].outerRadius * i, EPSILON));
+    }
+  });
+
+  group('SvgArc.innerRadiusCallback', () {
+    test('is assigned defaultInnerRadiusCallback by default', () {
+      SvgArc svgArc = new SvgArc();
+      SelectionCallback<num> callBack = svgArc.innerRadiusCallback;
+      mockSvgData.forEach((e) =>
+          expect(callBack(e, 0, null), equals(e.innerRadius)));
+      expect(callBack(null, 0, null), equals(0));
+      expect(callBack(new SvgArcData(0, 0, 0, 0, null, 0), 0, null), equals(0));
+    });
+    test('is assigned to (value) => value when set by value', () {
+      SvgArc svgArc = new SvgArc();
+      svgArc.innerRadius = 30;
+      SelectionCallback<num> callBack = svgArc.innerRadiusCallback;
+      mockSvgData.forEach((e) =>
+          expect(callBack(e, 0, null), equals(30)));
+    });
+  });
+
+  group('SvgArc.outerRadiusCallback', () {
+    test('is assigned defaultOuterRadiusCallback by default', () {
+      SvgArc svgArc = new SvgArc();
+      SelectionCallback<num> callBack = svgArc.outerRadiusCallback;
+      mockSvgData.forEach((e) =>
+          expect(callBack(e, 0, null), equals(e.outerRadius)));
+      expect(callBack(null, 0, null), equals(0));
+      expect(callBack(new SvgArcData(0, 0, 0, 0, 0, null), 0, null), equals(0));
+    });
+    test('is assigned to (value) => value when set by value', () {
+      SvgArc svgArc = new SvgArc();
+      svgArc.outerRadius = 30;
+      SelectionCallback<num> callBack = svgArc.outerRadiusCallback;
+      mockSvgData.forEach((e) =>
+          expect(callBack(e, 0, null), equals(30)));
+    });
+  });
+
+  group('SvgArc.startAngleCallback', () {
+    test('is assigned defaultStartAngleCallback by default', () {
+      SvgArc svgArc = new SvgArc();
+      SelectionCallback<num> callBack = svgArc.startAngleCallback;
+      mockSvgData.forEach((e) =>
+          expect(callBack(e, 0, null), equals(e.startAngle)));
+      expect(callBack(null, 0, null), equals(0));
+      expect(callBack(new SvgArcData(0, 0, null, 0, 0, 0), 0, null), equals(0));
+    });
+    test('is assigned to (value) => value when set by value', () {
+      SvgArc svgArc = new SvgArc();
+      svgArc.startAngle = 30;
+      SelectionCallback<num> callBack = svgArc.startAngleCallback;
+      mockSvgData.forEach((e) =>
+          expect(callBack(e, 0, null), equals(30)));
+    });
+  });
+
+  group('SvgArc.endAngleCallback', () {
+    test('is assigned defaultEndAngleCallback by default', () {
+      SvgArc svgArc = new SvgArc();
+      SelectionCallback<num> callBack = svgArc.endAngleCallback;
+      mockSvgData.forEach((e) =>
+          expect(callBack(e, 0, null), equals(e.endAngle)));
+      expect(callBack(null, 0, null), equals(0));
+      expect(callBack(new SvgArcData(0, 0, 0, null, 0, 0), 0, null), equals(0));
+    });
+    test('is assigned to (value) => value when set by value', () {
+      SvgArc svgArc = new SvgArc();
+      svgArc.endAngle = 30;
+      SelectionCallback<num> callBack = svgArc.endAngleCallback;
+      mockSvgData.forEach((e) =>
+          expect(callBack(e, 0, null), equals(30)));
+    });
+  });
+
+  test('SvgArc.centroid calculates the centroid of arc slice', () {
+    SvgArc svgArc = new SvgArc();
+    List centroid = svgArc.centroid(mockSvgData[0], 0, null);
+    expect(centroid[0], closeTo(0, EPSILON));
+    expect(centroid[1], closeTo(-50, EPSILON));
+    centroid = svgArc.centroid(mockSvgData[2], 0, null);
+    expect(centroid[0], closeTo(0, EPSILON));
+    expect(centroid[1], closeTo(50, EPSILON));
+    centroid = svgArc.centroid(mockSvgData[7], 0, null);
+    expect(centroid[0], closeTo(64.9519052838329, EPSILON));
+    expect(centroid[1], closeTo(37.5, EPSILON));
+  });
+
+  group('SvgArc.path', () {
+    test('generates concentric pie sector', () {
+      SvgArc svgArc = new SvgArc();
+      expect(svgArc.path(mockSvgData[2], 0, null),
+          equals('M0,100A100,100 0 1,1 0,-100A100,100 0 1,1 0,100Z'));
+    });
+    test('generates concentric donut circle', () {
+      SvgArc svgArc = new SvgArc();
+      expect(svgArc.path(mockSvgData[3], 0, null),
+          equals('M0,100A100,100 0 1,1 0,-100A100,100 0 1,1 0,100M0,'
+                 '50A50,50 0 1,0 0,-50A50,50 0 1,0 0,50Z'));
+    });
+    test('correctly generates pie sector', () {
+      SvgArc svgArc = new SvgArc();
+      expect(svgArc.path(mockSvgData[5], 0, null),
+          equals('M6.123233995736766e-15,-100.0A100,100 0 0,1 '
+                 '86.60254037844386,-50.0L43.30127018922193,'
+                 '-25.0A50,50 0 0,0 3.061616997868383e-15,-50.0Z'));
+      expect(svgArc.path(mockSvgData[7], 0, null),
+          equals('M86.60254037844386,-50.0A100,100 0 0,1 '
+                 '6.123233995736766e-15,100.0L3.061616997868383e-15,'
+                 '50.0A50,50 0 0,0 43.30127018922193,-25.0Z'));
+    });
+    test('correctly generates donut slice', () {
+      SvgArc svgArc = new SvgArc();
+      expect(svgArc.path(mockSvgData[4], 0, null),
+          equals('M6.123233995736766e-15,-100.0A100,100 '
+                 '0 0,1 86.60254037844386,-50.0L0,0Z'));
+      expect(svgArc.path(mockSvgData[6], 0, null),
+          equals('M86.60254037844386,-50.0A100,100 0 0,1 '
+                 '6.123233995736766e-15,100.0L0,0Z'));
+    });
+  });
+
+}