From 9d0b14becbcd26ef991f80a7b15f6a4ab8729e13 Mon Sep 17 00:00:00 2001
From: Fabian Becker <fabian@zesty.com>
Date: Fri, 11 Dec 2015 16:55:09 +0100
Subject: [PATCH] Mathematics tests

refs #53
---
 .../java/eva2/tools/math/Mathematics.java     | 21 ++++----
 .../java/eva2/tools/math/MathematicsTest.java | 50 +++++++++++++++++++
 2 files changed, 61 insertions(+), 10 deletions(-)

diff --git a/src/main/java/eva2/tools/math/Mathematics.java b/src/main/java/eva2/tools/math/Mathematics.java
index 94491398..efbccfbd 100644
--- a/src/main/java/eva2/tools/math/Mathematics.java
+++ b/src/main/java/eva2/tools/math/Mathematics.java
@@ -811,7 +811,7 @@ public final class Mathematics {
     }
 
     /**
-     * Project the values in x to the range given. The range must be an vector
+     * Project the values in x to the range given. The range must be a vector
      * of 2d-arrays each of which containing lower and upper bound in the i-th
      * dimension. x must not be longer than the available ranges. Values
      * exceeding the bounds are set on the bound. The number of bound violations
@@ -841,9 +841,9 @@ public final class Mathematics {
     /**
      * Project the value to the range given.
      *
-     * @param v
-     * @param min
-     * @param max
+     * @param v     Value
+     * @param min   Lower bound
+     * @param max   Upper bound
      * @return the closest value to v within [min,max]
      */
     public static double projectValue(double v, double min, double max) {
@@ -987,8 +987,8 @@ public final class Mathematics {
     /**
      * Rotate the vector by angle alpha around axis i/j
      *
-     * @param vect
-     * @param alpha
+     * @param vect  Vector
+     * @param alpha Rotation angle
      * @param i
      * @param j
      */
@@ -1003,8 +1003,8 @@ public final class Mathematics {
      * Rotate a given double vector using a rotation matrix. If the matrix is
      * null, x will be returned unchanged. Matrix dimensions must fit.
      *
-     * @param x
-     * @param rotMatrix
+     * @param x         Vector
+     * @param rotMatrix Rotation matrix
      * @return the rotated vector
      */
     public static double[] rotate(double[] x, Matrix rotMatrix) {
@@ -1077,6 +1077,7 @@ public final class Mathematics {
      * Shift bounds by a constant value in every dimension.
      *
      * @param range
+     * @param dist
      * @return
      */
     public static void shiftRange(double[][] range, double dist) {
@@ -1292,8 +1293,8 @@ public final class Mathematics {
     /**
      * Add vectors returning a new vector c = a + b;
      *
-     * @param a
-     * @param b
+     * @param a Vector 1
+     * @param b Vector 2
      * @return a new vector c = a + b
      */
     public static double[] vvAdd(double[] a, double[] b) {
diff --git a/src/test/java/eva2/tools/math/MathematicsTest.java b/src/test/java/eva2/tools/math/MathematicsTest.java
index 20c704d2..29471166 100644
--- a/src/test/java/eva2/tools/math/MathematicsTest.java
+++ b/src/test/java/eva2/tools/math/MathematicsTest.java
@@ -116,7 +116,29 @@ public class MathematicsTest {
 
     @Test
     public void testProjectToRange() throws Exception {
+        double[] v = {1.0, 11.0, 7.5, 9.0};
+        double[][] range = {
+                {5.0, 10.0},
+                {5.0, 10.0},
+                {5.0, 10.0},
+                {5.0, 10.0}
+        };
 
+        int violations = Mathematics.projectToRange(v, range);
+
+        // Has two violations
+        assertEquals(2, violations);
+        assertArrayEquals(new double[]{5.0, 10.0, 7.5, 9.0}, v, 0.0);
+    }
+
+    @Test
+    public void testProjectToValue() throws Exception {
+        // Lower range
+        assertEquals(5.0, Mathematics.projectValue(2.0, 5.0, 10.0), 0.0);
+        // Upper range
+        assertEquals(10.0, Mathematics.projectValue(12.0, 5.0, 10.0), 0.0);
+        // In range
+        assertEquals(7.5, Mathematics.projectValue(7.5, 5.0, 10.0), 0.0);
     }
 
     @Test
@@ -226,4 +248,32 @@ public class MathematicsTest {
 
         assertArrayEquals(new double[]{2.0, 2.0, 2.0}, Mathematics.vvSub(v1, v2), 0.0);
     }
+
+    @Test
+    public void testVvAdd() throws Exception {
+        double[] v1 = {5.0, 6.0, 7.0}, v2 = {3.0, 4.0, 5.0};
+
+        assertArrayEquals(new double[]{8.0, 10.0, 12.0}, Mathematics.vvAdd(v1, v2), 0.0);
+    }
+
+    @Test
+    public void testSvMult() throws Exception {
+        double[] v1 = {3.0, 4.0, 5.0};
+
+        assertArrayEquals(new double[]{6.0, 8.0, 10.0}, Mathematics.svMult(2.0, v1), 0.0);
+    }
+
+    @Test
+    public void testSvDiv() throws Exception {
+        double[] v1 = {6.0, 8.0, 10.0};
+
+        assertArrayEquals(new double[]{3.0, 4.0, 5.0}, Mathematics.svDiv(2.0, v1), 0.0);
+    }
+
+    @Test
+    public void testSvAdd() throws Exception {
+        double[] v1 = {3.0, 4.0, 5.0};
+
+        assertArrayEquals(new double[]{5.0, 6.0, 7.0}, Mathematics.svAdd(2.0, v1), 0.0);
+    }
 }
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