2 files changed, 129 insertions, 0 deletions
diff --git a/tests/src/com/android/inputmethod/keyboard/internal/MatrixUtilsTests.java b/tests/src/com/android/inputmethod/keyboard/internal/MatrixUtilsTests.java
new file mode 100644
index 000000000..e2a11ab99
--- /dev/null
+++ b/tests/src/com/android/inputmethod/keyboard/internal/MatrixUtilsTests.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.keyboard.internal;
+
+import com.android.inputmethod.keyboard.internal.MatrixUtils.MatrixOperationFailedException;
+
+import android.test.AndroidTestCase;
+import android.test.suitebuilder.annotation.SmallTest;
+
+@SmallTest
+public class MatrixUtilsTests extends AndroidTestCase {
+    // "run tests" -c com.android.inputmethod.keyboard.internal.MatrixUtilsTests
+    private static final boolean DEBUG = false;
+    private static final float EPSILON = 0.00001f;
+
+    private static void assertEqualsFloat(float f0, float f1) {
+        assertEqualsFloat(f0, f1, EPSILON);
+    }
+
+    /* package */ static void assertEqualsFloat(float f0, float f1, float error) {
+        assertTrue(Math.abs(f0 - f1) < error);
+    }
+
+    public void testMulti() {
+        final float[][] matrixA = {{1, 2}, {3, 4}};
+        final float[][] matrixB = {{5, 6}, {7, 8}};
+        final float[][] retval = new float[2][2];
+        try {
+            MatrixUtils.multiply(matrixA, matrixB, retval);
+        } catch (MatrixOperationFailedException e) {
+            assertTrue(false);
+        }
+        if (DEBUG) {
+            MatrixUtils.dump("multi", retval);
+        }
+        assertEqualsFloat(retval[0][0], 19);
+        assertEqualsFloat(retval[0][1], 22);
+        assertEqualsFloat(retval[1][0], 43);
+        assertEqualsFloat(retval[1][1], 50);
+    }
+
+    public void testInverse() {
+        final int N = 4;
+        final float[][] matrix =
+                {{1, 2, 3, 4}, {4, 0, 5, 6}, {6, 4, 2, 0}, {6, 4, 2, 1}};
+        final float[][] inverse = new float[N][N];
+        final float[][] tempMatrix = new float[N][N];
+        for (int i = 0; i < N; ++i) {
+            for (int j = 0; j < N; ++j) {
+                tempMatrix[i][j] = matrix[i][j];
+            }
+        }
+        final float[][] retval = new float[N][N];
+        try {
+            MatrixUtils.inverse(tempMatrix, inverse);
+        } catch (MatrixOperationFailedException e) {
+            assertTrue(false);
+        }
+        try {
+            MatrixUtils.multiply(matrix, inverse, retval);
+        } catch (MatrixOperationFailedException e) {
+            assertTrue(false);
+        }
+        for (int i = 0; i < N; ++i) {
+            for (int j = 0; j < N; ++j) {
+                assertEqualsFloat(((i == j) ? 1.0f : 0.0f), retval[i][j]);
+            }
+        }
+    }
+}
diff --git a/tests/src/com/android/inputmethod/keyboard/internal/SmoothingUtilsTests.java b/tests/src/com/android/inputmethod/keyboard/internal/SmoothingUtilsTests.java
new file mode 100644
index 000000000..293741af2
--- /dev/null
+++ b/tests/src/com/android/inputmethod/keyboard/internal/SmoothingUtilsTests.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.keyboard.internal;
+
+import com.android.inputmethod.keyboard.internal.MatrixUtils.MatrixOperationFailedException;
+
+import android.test.AndroidTestCase;
+import android.test.suitebuilder.annotation.SmallTest;
+
+@SmallTest
+public class SmoothingUtilsTests extends AndroidTestCase {
+    // "run tests" -c com.android.inputmethod.keyboard.internal.SmoothingUtilsTests
+    private static final boolean DEBUG = false;
+
+    public void testGet3DParamaters() {
+        final float[] xs = new float[] {0, 1, 2, 3, 4};
+        final float[] ys = new float[] {1, 4, 15, 40, 85}; // y = x^3 + x^2 + x + 1
+        final float[][] retval = new float[4][1];
+        try {
+            SmoothingUtils.get3DParameters(xs, ys, retval);
+            if (DEBUG) {
+                MatrixUtils.dump("3d", retval);
+            }
+            for (int i = 0; i < 4; ++i) {
+                MatrixUtilsTests.assertEqualsFloat(retval[i][0], 1.0f, 0.001f);
+            }
+        } catch (MatrixOperationFailedException e) {
+            assertTrue(false);
+        }
+    }
+}