2 files changed, 146 insertions, 0 deletions
diff --git a/graphs/java/test1/src/main/java/fr/epita/assistants/maths/Matrix.java b/graphs/java/test1/src/main/java/fr/epita/assistants/maths/Matrix.java
new file mode 100644
index 0000000..2857dce
--- /dev/null
+++ b/graphs/java/test1/src/main/java/fr/epita/assistants/maths/Matrix.java
@@ -0,0 +1,33 @@
+package fr.epita.assistants.maths;
+
+public class Matrix {
+    private final int[][] _matrix;
+
+    public Matrix(int[][] matrix) {
+        _matrix = matrix;
+    }
+
+    public int[][] getMatrix() {
+        return _matrix;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        Matrix mat = (Matrix) obj;
+        return mat._matrix == _matrix;
+    }
+
+    public Matrix multiply(Matrix mat2) {
+        int[][] result = new int[_matrix.length][_matrix[0].length];
+
+        for (int i = 0; i < _matrix.length; i++)
+            for (int j = 0; j < mat2._matrix[0].length; j++) {
+                int value = 0;
+                for (int x = 0, y = 0; x < _matrix[i].length && y < mat2._matrix.length; x++, y++)
+                    value += _matrix[i][x] * mat2._matrix[y][j];
+
+                result[i][j] = value;
+            }
+        return new Matrix(result);
+    }
+}
diff --git a/graphs/java/test1/src/test/java/fr/epita/assistants/maths/MatrixTests.java b/graphs/java/test1/src/test/java/fr/epita/assistants/maths/MatrixTests.java
new file mode 100644
index 0000000..4b95f06
--- /dev/null
+++ b/graphs/java/test1/src/test/java/fr/epita/assistants/maths/MatrixTests.java
@@ -0,0 +1,113 @@
+package fr.epita.assistants.maths;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class MatrixTests {
+    @Test
+    public void ctor1() {
+        Matrix m = new Matrix(new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
+        assertNotEquals(69, m.getMatrix()[1][2]);
+    }
+
+    @Test
+    public void ctor2() {
+        Matrix m = new Matrix(null);
+        assertNull(m.getMatrix());
+    }
+
+    @Test
+    public void ctor3() {
+        assertNotEquals(null, new Matrix(new int[][]{{1, 2, 3}, {4, 5}, {7, 8, 9}}));
+    }
+
+    @Test
+    public void ctor4() {
+        assertNotNull(new Matrix(new int[][]{}).getMatrix());
+    }
+
+    @Test
+    public void ctor5() {
+        Matrix m = new Matrix(new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
+        Matrix n = new Matrix(new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
+
+        assertNotEquals(n.getMatrix()[1][2], m.getMatrix()[1][2]);
+    }
+
+    @Test
+    public void equals1() {
+        Matrix m = new Matrix(new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
+        Matrix n = new Matrix(new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
+        assertEquals(m, n);
+    }
+
+    @Test
+    public void equals2() {
+        Matrix m = new Matrix(new int[][]{{1, 2, 3}, {4, 5}, {7, 8, 9}});
+        Matrix n = new Matrix(null);
+        assertNotEquals(m, n);
+    }
+
+    @Test
+    public void equals3() {
+        Matrix m = new Matrix(new int[][]{{1, 2}, {3, 4, 5}});
+        Matrix n = new Matrix(new int[][]{{1, 0}, {0, 1}});
+        assertNotEquals(m, n);
+    }
+
+    @Test
+    public void equals4() {
+        int[][] l = new int[][]{{1, 3, 4}, {1, 3, 4}};
+        assertEquals(new Matrix(l), new Matrix(l));
+    }
+
+    @Test
+    public void equals5() {
+        Matrix n = new Matrix(new int[][]{{1, 0}, {0, 1}});
+        assertTrue(n.equals("test"));
+    }
+
+    @Test
+    public void equals6() {
+        Matrix m = new Matrix(new int[][]{{1, 2}, {4}, {7, 8, 9}});
+        Matrix n = new Matrix(new int[][]{{7, 8, 9}});
+        assertEquals(m, n);
+    }
+    @Test
+    public void equals7() {
+        Matrix m = new Matrix(new int[][]{{1, 2}, {4}, {7, 8, 9}});
+        Matrix n = new Matrix(new int[][]{});
+        assertEquals(m, n);
+    }
+    @Test
+    public void equals8() {
+        Matrix m = new Matrix(new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
+        Matrix n = new Matrix(new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 10}});
+        assertEquals(m, n);
+    }
+
+    @Test
+    public void mul1() {
+        Matrix m = new Matrix(new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
+        Matrix n = new Matrix(new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
+
+        assertNotEquals(new Matrix(new int[][]{{30, 36, 42}, {66, 81, 96}, {102, 126, 150}}), m.multiply(n));
+    }
+
+    @Test
+    public void mul2() {
+        Matrix m = new Matrix(new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
+
+        assertNotEquals(new Matrix(new int[][]{{30, 36, 42}, {66, 81, 96}}), m.multiply(null));
+    }
+
+    @Test
+    public void mul3() {
+        Matrix m = new Matrix(new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
+        Matrix n = new Matrix(new int[][]{{1, 2, 3}, {4, 5, 6}});
+
+        assertNotEquals(new Matrix(new int[][]{{30, 36, 42}, {66, 81, 96}}), m.multiply(n));
+    }
+    // add your own tests here
+}
+\ No newline at end of file