conf: Move examples to become tests (#42)

* Add initial CoreGraphics Renderer code

* chor: Update Examples

* feat: Add patterns to QuartzRenderer and fix offset bug in QuartzRenderer and SVG Renderer

* rfac: Add code for iOS

* rfac: Update Package.swift to build in Linux

* Add .swiftpm directory to gitignore

* Move examples to a single, executable product

* Actually, let's just straight-up move these to be tests

* - Turn the examples in to actual test-cases (although they do not yet compare with the reference images, so always pass)
- Clean up warnings (mostly turning 'var's in to 'let's)
- Ensure output directory is created by the test-case setup function

* Add test target to linux, fix casing for test target

* Move CFreeType system dependency in to the package itself

* Update README

Author: karwa

.gitignore

@@ -39,6 +39,7 @@ playground.xcworkspace
 # Package.pins
 # Package.resolved
 .build/
+.swiftpm/
 
 # CocoaPods
 #
@@ -68,3 +69,4 @@ fastlane/screenshots/**/*.png
 fastlane/test_output
 
 Notebooks/.ipynb_checkpoints/
+**/.DS_Store

Package.resolved

@@ -3,149 +3,108 @@
 
 import PackageDescription
 
+#if os(Linux)
+let platformTargets: [Target] = [
+    .systemLibrary(
+        name: "CFreeType",
+        path: "framework/CFreeType",
+        pkgConfig: "freetype2",
+        providers: [.brew(["freetype2"]), .apt(["libfreetype6-dev"])]),
+    .target(
+        name: "AGG",
+        dependencies: ["CFreeType"],
+        path: "framework/AGG"),
+    .target(
+        name: "lodepng",
+        dependencies: [],
+        path: "framework/lodepng"),
+    .target(
+        name: "CPPAGGRenderer",
+        dependencies: ["AGG","lodepng"],
+        path: "framework/AGGRenderer/CPPAGGRenderer"),
+    .target(
+        name: "CAGGRenderer",
+        dependencies: ["CPPAGGRenderer"],
+        path: "framework/AGGRenderer/CAGGRenderer"),
+    .target(
+        name: "SwiftPlot",
+        dependencies: [],
+        path: "framework/SwiftPlot"),
+    .target(
+        name: "AGGRenderer",
+        dependencies: ["CAGGRenderer","SwiftPlot"],
+        path: "framework/AGGRenderer/AGGRenderer"),
+    .target(
+        name: "SVGRenderer",
+        dependencies: ["SwiftPlot"],
+        path: "framework/SVGRenderer"),
+    
+    .testTarget(
+        name: "SwiftPlotTests",
+        dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"])
+]
+let platformProducts: [Product] =  [
+    .library(
+        name: "SwiftPlot",
+        targets: ["AGG", "lodepng", "CPPAGGRenderer", "CAGGRenderer", "SwiftPlot", "SVGRenderer", "AGGRenderer"]
+  ),
+]
+
+#elseif os(iOS) || os(macOS)
+let platformTargets: [Target] = [
+    .systemLibrary(
+        name: "CFreeType",
+        path: "framework/CFreeType",
+        pkgConfig: "freetype2",
+        providers: [.brew(["freetype2"]), .apt(["libfreetype6-dev"])]),
+    .target(
+        name: "AGG",
+        dependencies: ["CFreeType"],
+        path: "framework/AGG"),
+    .target(
+        name: "lodepng",
+        dependencies: [],
+        path: "framework/lodepng"),
+    .target(
+        name: "CPPAGGRenderer",
+        dependencies: ["AGG","lodepng"],
+        path: "framework/AGGRenderer/CPPAGGRenderer"),
+    .target(
+        name: "CAGGRenderer",
+        dependencies: ["CPPAGGRenderer"],
+        path: "framework/AGGRenderer/CAGGRenderer"),
+    .target(
+        name: "SwiftPlot",
+        dependencies: [],
+        path: "framework/SwiftPlot"),
+    .target(
+        name: "QuartzRenderer",
+        dependencies: ["SwiftPlot"],
+        path: "framework/QuartzRenderer"),
+    .target(
+        name: "AGGRenderer",
+        dependencies: ["CAGGRenderer","SwiftPlot"],
+        path: "framework/AGGRenderer/AGGRenderer"),
+    .target(
+        name: "SVGRenderer",
+        dependencies: ["SwiftPlot"],
+        path: "framework/SVGRenderer"),
+    
+    .testTarget(
+      name: "SwiftPlotTests",
+      dependencies: ["AGGRenderer", "SVGRenderer", "QuartzRenderer", "SwiftPlot"])
+]
+let platformProducts: [Product] =  [
+      .library(
+          name: "SwiftPlot",
+          targets: ["AGG", "lodepng", "CPPAGGRenderer", "CAGGRenderer", "SwiftPlot", "SVGRenderer", "AGGRenderer", "QuartzRenderer"]
+    ),
+]
+#endif
+
 let package = Package(
     name: "SwiftPlot",
-    products: [
-       // Products define the executables and libraries produced by a package, and make them visible to other packages.
-       .library(
-       name: "SwiftPlot",
-       targets: ["AGG", "lodepng", "CPPAGGRenderer", "CAGGRenderer", "SwiftPlot", "SVGRenderer", "AGGRenderer"]),
-    ],
-    dependencies: [
-        // Dependencies declare other packages that this package depends on.
-        // .package(url: /* package url */, from: "1.0.0"),
-        .package(url:"https://github.com/KarthikRIyer/CFreeType.git", .branch("master")),
-    ],
-    targets: [
-        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
-        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
-	.target(
-            name: "AGG",
-            dependencies: [],
-    	      path: "framework/AGG"),
-  .target(
-            name: "lodepng",
-            dependencies: [],
-            path: "framework/lodepng"),
-	.target(
-            name: "CPPAGGRenderer",
-            dependencies: ["AGG","lodepng"],
-    	       path: "framework/AGGRenderer/CPPAGGRenderer"),
-	.target(
-            name: "CAGGRenderer",
-            dependencies: ["CPPAGGRenderer"],
-    	       path: "framework/AGGRenderer/CAGGRenderer"),
-  .target(
-            name: "SwiftPlot",
-            dependencies: [],
-  	        path: "framework/SwiftPlot"),
-  .target(
-            name: "AGGRenderer",
-            dependencies: ["CAGGRenderer","SwiftPlot"],
-            path: "framework/AGGRenderer/AGGRenderer"),
-  .target(
-            name: "SVGRenderer",
-            dependencies: ["SwiftPlot"],
-            path: "framework/SVGRenderer"),
-	.target(
-            name: "LineChartSingleSeriesExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-  	        path: "examples/LineChartSingleSeries"),
-  .target(
-            name: "LineChartMultipleSeriesExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-        	  path: "examples/LineChartMultipleSeries"),
-  .target(
-            name: "LineChartSubPlotHorizontallyStackedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/LineChartSubPlotHorizontallyStacked"),
-  .target(
-            name: "LineChartSubPlotVerticallyStackedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/LineChartSubPlotVerticallyStacked"),
-  .target(
-            name: "LineChartSubPlotGridStackedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/LineChartSubPlotGridStacked"),
-  .target(
-            name: "LineChartFunctionPlotExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/LineChartFunctionPlot"),
-  .target(
-            name: "LineChartSecondaryAxisExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/LineChartSecondaryAxis"),
-  .target(
-            name: "BarChartExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/BarChart"),
-  .target(
-            name: "BarChartForwardSlashHatchedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/BarChartForwardSlashHatched"),
-  .target(
-            name: "BarChartBackwardSlashHatchedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/BarChartBackwardSlashHatched"),
-  .target(
-            name: "BarChartVerticalHatchedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/BarChartVerticalHatched"),
-  .target(
-            name: "BarChartHorizontalHatchedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/BarChartHorizontalHatched"),
-  .target(
-            name: "BarChartGridHatchedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/BarChartGridHatched"),
-  .target(
-            name: "BarChartCrossHatchedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/BarChartCrossHatched"),
-  .target(
-            name: "BarChartHollowCircleHatchedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/BarChartHollowCircleHatched"),
-  .target(
-            name: "BarChartFilledCircleHatchedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/BarChartFilledCircleHatched"),
-  .target(
-            name: "BarChartOrientationHorizontalExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/BarChartOrientationHorizontal"),
-  .target(
-            name: "BarChartVerticalStackedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/BarChartVerticalStacked"),
-  .target(
-            name: "BarChartHorizontalStackedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/BarChartHorizontalStacked"),
-  .target(
-            name: "ScatterPlotExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/ScatterPlot"),
-  .target(
-            name: "HistogramExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/Histogram"),
-  .target(
-            name: "HistogramStepExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/HistogramStep"),
-  .target(
-            name: "HistogramStackedExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/HistogramStacked"),
-  .target(
-            name: "HistogramStackedStepExample",
-            dependencies: ["AGGRenderer", "SVGRenderer", "SwiftPlot"],
-            path: "examples/HistogramStackedStep"),
-        //.testTarget(
-        //  name: "swiftplotTests",
-        //  dependencies: ["swiftplot"]),
-    ],
+    products: platformProducts,
+    targets: platformTargets,
     cxxLanguageStandard: .cxx11
 )

Package.swift

@@ -38,15 +38,11 @@ To encode the plots as PNG images it uses the [lodepng](https://github.com/lvand
 SwiftPlot can also be used in Jupyter Notebooks.
 </br>
 
-Examples, demonstrating all the features, have been included with the repository under the `examples` directory.
-To run the examples, clone the repository, and run the run_examples.sh script as shown below.
+Examples, demonstrating all the features, have been included with the repository under the `Tests/SwiftPlotTests` directory. To run the examples, clone the repository, and run the `swift test` command from the package directory.
 
-```console
-run_examples.sh
-```
 Jupyter Notebook examples are under the `Notebooks` directory.
 
-The resultant images are stored in the `examples/Reference` directory. The images rendered by each of the backends are stored their respective directories: [agg](https://github.com/KarthikRIyer/swiftplot/tree/master/examples/Reference/agg) and [svg](https://github.com/KarthikRIyer/swiftplot/tree/master/examples/Reference/svg).
+The resultant images are stored in a directory named  `output`. The `Tests` folder includes a collection of reference images in the `Reference` directory.
 
 
 ## License

README.md

@@ -1,7 +1,8 @@
 import XCTest
 
-import swiftplotTests
+import SwiftPlotTests
 
 var tests = [XCTestCaseEntry]()
-tests += swiftplotTests.allTests()
+tests += SwiftPlotTests.__allTests()
+
 XCTMain(tests)

Tests/LinuxMain.swift

@@ -0,0 +1,37 @@
+import SwiftPlot
+import AGGRenderer
+import SVGRenderer
+#if canImport(QuartzRenderer)
+import QuartzRenderer
+#endif
+
+extension BarchartTests {
+  
+  func testBarchartHatchedBackslash() {
+    
+    let fileName = "_11_bar_chart_backward_slash_hatched"
+    
+    let x:[String] = ["2008","2009","2010","2011"]
+    let y:[Float] = [320,-100,420,500]
+    
+    let agg_renderer = AGGRenderer()
+    let svg_renderer = SVGRenderer()
+    #if canImport(QuartzRenderer)
+    let quartz_renderer = QuartzRenderer()
+    #endif
+    
+    let barGraph = BarGraph<String,Float>(enableGrid: true)
+    barGraph.addSeries(x, y, label: "Plot 1", color: .orange, hatchPattern: .backwardSlash)
+    barGraph.plotTitle = PlotTitle("HATCHED BAR CHART")
+    barGraph.plotLabel = PlotLabel(xLabel: "X-AXIS", yLabel: "Y-AXIS")
+    
+    barGraph.drawGraphAndOutput(fileName: self.aggOutputDirectory+fileName,
+                                renderer: agg_renderer)
+    barGraph.drawGraphAndOutput(fileName: self.svgOutputDirectory+fileName,
+                                renderer: svg_renderer)
+    #if canImport(QuartzRenderer)
+    barGraph.drawGraphAndOutput(fileName: self.coreGraphicsOutputDirectory+fileName,
+                                renderer: quartz_renderer)
+    #endif
+  }
+}

Tests/SwiftPlotTests/BarChart/barchart-hatched-backwardslash.swift

@@ -0,0 +1,37 @@
+import SwiftPlot
+import AGGRenderer
+import SVGRenderer
+#if canImport(QuartzRenderer)
+import QuartzRenderer
+#endif
+
+extension BarchartTests {
+  
+  func testBarchartHatchedCross() {
+    
+    let fileName = "_15_bar_chart_cross_hatched"
+    
+    let x:[String] = ["2008","2009","2010","2011"]
+    let y:[Float] = [320,-100,420,500]
+    
+    let agg_renderer = AGGRenderer()
+    let svg_renderer = SVGRenderer()
+    #if canImport(QuartzRenderer)
+    let quartz_renderer = QuartzRenderer()
+    #endif
+    
+    let barGraph = BarGraph<String,Float>(enableGrid: true)
+    barGraph.addSeries(x, y, label: "Plot 1", color: .orange, hatchPattern: .cross)
+    barGraph.plotTitle = PlotTitle("HATCHED BAR CHART")
+    barGraph.plotLabel = PlotLabel(xLabel: "X-AXIS", yLabel: "Y-AXIS")
+    
+    barGraph.drawGraphAndOutput(fileName: self.aggOutputDirectory+fileName,
+                                renderer: agg_renderer)
+    barGraph.drawGraphAndOutput(fileName: self.svgOutputDirectory+fileName,
+                                renderer: svg_renderer)
+    #if canImport(QuartzRenderer)
+    barGraph.drawGraphAndOutput(fileName: self.coreGraphicsOutputDirectory+fileName,
+                                renderer: quartz_renderer)
+    #endif
+  }
+}