reference: Add hue and green

Signed-off-by: Ce Gao <ce.gao@outlook.com>

examples/reference/green/green1/.test.yml

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+test:
+  reference: https://processing.org/reference/images/green_.png

examples/reference/green/green1/green1.rpde

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+c = color(20, 75, 200)  # Define color 'c'
+fill(c)  # Use color variable 'c' as fill color
+rect(15, 20, 35, 60)  # Draw left rectangle
+
+greenValue = green(c)  # Get green in 'c'
+print(greenValue)  # Print '75.0'
+fill(0, greenValue, 0)  # Use 'greenValue' in new fill
+rect(50, 20, 35, 60)  # Draw right rectangle

examples/reference/hue/hue1/.test.yml

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+test:
+  reference: https://processing.org/reference/images/hue_.png

examples/reference/hue/hue1/hue1.rpde

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+noStroke()
+colorMode(HSB, 255)
+c = color(0, 126, 255)
+fill(c)
+rect(15, 20, 35, 60)
+value = hue(c)  # Sets 'value' to '0'
+fill(value)
+rect(50, 20, 35, 60)

src/test/e2e/core/function/Green1Test.java

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+
+// Generated by hack/generate-e2e-test.py
+package test.e2e.core.function;
+
+import static org.junit.Assert.fail;
+import org.junit.Test;
+import test.e2e.core.E2eTestBase;
+
+public class Green1Test extends E2eTestBase {
+
+  public Green1Test() {
+    coreCodeTemplate = "c = color(20, 75, 200)  # Define color 'c'\nfill(c)  # Use color variable 'c' as fill color\nrect(15, 20, 35, 60)  # Draw left rectangle\n\ngreenValue = green(c)  # Get green in 'c'\nprint(greenValue)  # Print '75.0'\nfill(0, greenValue, 0)  # Use 'greenValue' in new fill\nrect(50, 20, 35, 60)  # Draw right rectangle\n\nsaveFrame(\"%s\")\nexit()\n";
+    referenceURI = "https://processing.org/reference/images/green_.png";
+  }
+
+  @Test
+  public void test() {
+    try {
+      defaultOperation();
+    } catch (Exception exception) {
+      System.err.println(exception);
+      fail("Should not have thrown any exception");
+    }
+  }
+}

src/test/e2e/core/function/Hue1Test.java

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+
+// Generated by hack/generate-e2e-test.py
+package test.e2e.core.function;
+
+import static org.junit.Assert.fail;
+import org.junit.Test;
+import test.e2e.core.E2eTestBase;
+
+public class Hue1Test extends E2eTestBase {
+
+  public Hue1Test() {
+    coreCodeTemplate = "noStroke()\ncolorMode(HSB, 255)\nc = color(0, 126, 255)\nfill(c)\nrect(15, 20, 35, 60)\nvalue = hue(c)  # Sets 'value' to '0'\nfill(value)\nrect(50, 20, 35, 60)\n\nsaveFrame(\"%s\")\nexit()\n";
+    referenceURI = "https://processing.org/reference/images/hue_.png";
+  }
+
+  @Test
+  public void test() {
+    try {
+      defaultOperation();
+    } catch (Exception exception) {
+      System.err.println(exception);
+      fail("Should not have thrown any exception");
+    }
+  }
+}