From e0f3fe3cc0e3e35a90a9fd19205409f075cecff4 Mon Sep 17 00:00:00 2001
From: Martin Diehl <mail@martin-diehl.net>
Date: Thu, 21 Nov 2019 21:01:01 +0100
Subject: [PATCH] ported from hand written test class

---
 python/tests/test_Rotation.py  | 54 ++++++++++++++++++++++++++++++++++
 python/tests/test_mechanics.py |  9 +++++-
 2 files changed, 62 insertions(+), 1 deletion(-)
 create mode 100644 python/tests/test_Rotation.py

diff --git a/python/tests/test_Rotation.py b/python/tests/test_Rotation.py
new file mode 100644
index 000000000..c0834f9a8
--- /dev/null
+++ b/python/tests/test_Rotation.py
@@ -0,0 +1,54 @@
+import numpy as np
+from damask import Rotation
+
+class TestRotation:
+   
+    n = 1000
+
+    def test_Eulers(self):
+        for r in range(self.n):
+            rot = Rotation.fromRandom()
+            assert  np.allclose(rot.asQuaternion(), 
+                                Rotation.fromEulers(rot.asEulers()).asQuaternion())
+
+
+    def test_AxisAngle(self):
+        for r in range(self.n):
+            rot = Rotation.fromRandom()
+            assert  np.allclose(rot.asEulers(),
+                                Rotation.fromAxisAngle(rot.asAxisAngle()).asEulers())
+
+
+    def test_Matrix(self):
+        for r in range(self.n):
+            rot = Rotation.fromRandom()
+            assert  np.allclose(rot.asAxisAngle(),
+                                Rotation.fromMatrix(rot.asMatrix()).asAxisAngle())
+
+
+    def test_Rodriques(self):
+        for r in range(self.n):
+            rot = Rotation.fromRandom()
+            assert  np.allclose(rot.asMatrix(),
+                                Rotation.fromRodrigues(rot.asRodrigues()).asMatrix())
+
+
+    def test_Homochoric(self):
+        for r in range(self.n):
+            rot = Rotation.fromRandom()
+            assert  np.allclose(rot.asRodrigues(),
+                                Rotation.fromHomochoric(rot.asHomochoric()).asRodrigues())
+
+
+    def test_Cubochoric(self):
+        for r in range(self.n):
+            rot = Rotation.fromRandom()
+            assert  np.allclose(rot.asHomochoric(),
+                                Rotation.fromCubochoric(rot.asCubochoric()).asHomochoric())
+
+
+    def test_Quaternion(self):
+        for r in range(self.n):
+            rot = Rotation.fromRandom()
+            assert  np.allclose(rot.asCubochoric(),
+                                Rotation.fromQuaternion(rot.asQuaternion()).asCubochoric())
diff --git a/python/tests/test_mechanics.py b/python/tests/test_mechanics.py
index aeed1594a..aab92bef3 100644
--- a/python/tests/test_mechanics.py
+++ b/python/tests/test_mechanics.py
@@ -3,7 +3,7 @@ from damask import mechanics
 
 class TestMechanics:
    
-    n = 9
+    n = 1000
     c = np.random.randint(n)
    
 
@@ -133,3 +133,10 @@ class TestMechanics:
          x = mechanics.symmetric(np.random.random((self.n,3,3)))
          assert np.allclose(mechanics.transpose(x),
                             x)
+
+
+    def test_Mises(self):
+         """Ensure that equivalent stress is 3/2 of equivalent strain."""
+         x = np.random.random((self.n,3,3))
+         assert np.allclose(mechanics.Mises_stress(x)/mechanics.Mises_strain(x),
+                            1.5)